bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis of 1-(4-Antipyrine)-3-( 3-Nitroaniline)-Triazene and Study on Determination of Copper(II) in Water Samples by Spectrophotometry
Authors: Chen Wen Bin
Published: October 2011

The synthesis of a new triazene reagent 1-(4-antipyrine)-3-( 3-nitroaniline)-triazene (ANTA) and its color reaction with Cu (Ⅱ) was studied and a new spectrophotometric method for the determination of Cu (Ⅱ) was established. The results showed that in the presence of micromulsion Tween-80, ASTA could reacted with Cu ( Ⅱ) to form a red stable complex of which the molar ratio of reagent︰metal was 2︰1 in Na2B4O7-NaOH medium.. The maximum absorption peak of the complex was located at 522 nm with the apparent molar absorption of 1.5 ×105 L•mol-1•cm-1. Beers law was obeyed in the range of 0.3～5.5 μg/10 mL for Cu (Ⅱ) and the detection limit was 0.10 mg/L. Many ions did not interfere the colour reaction system due to the existence of ammonia. This method was applied to determination of Cu (Ⅱ) in water samples, and the results were in accordance with those obtained by AAS method. Recovery was in the range of 103.1～103.4 % and the RSD(n=6) was not more than 4.2%.
A Numerical Sensitivity Analysis to Bentonite Parameters for a Long Term Geochemical Evolution of a HLW Repository in Clay
Authors: Yang Qing Chun , Lu Wei , Li Ping
Published: October 2011

Deep geological disposal (DGD) is selected for the long-term confinement of high-level radioactive waste (HLW) by many countries. Safety assessment of nuclear waste disposal in a deep geological repository requires understanding and quantifying radionuclide behavior through the hosting geological formation. This paper presents a numerical model to deal with the pore water composition in bentonite barrier in the evolving geochemical environment which includes bentonite, concrete and clay in a high level radioactive waste repository designed in clay formation, the model considers the following processes: advection, diffusion, aqueous complexation, mineral dissolution/precipitation and cation exchange. Bentonite porosity changes caused by mineral dissolution/precipitation reactions are taken into account in the model. The numerical sensitivity analysis to the accessible porosity of bentonite are performed, the results illustrate that the pH in bentonite is sensitive to changes in accessible porosity of bentonite, the concentrations of aqueous species are sensitive to bentonite porosity before 1000 years, and the effective diffusion coefficient of bentonite controls the extent of high pH plume in bentonite.
Research for Treating Avermectin Wastewater with UASB Technique
Authors: Chang Yan Hong , Feng Hui Tao , Luo Hui , Ma San Jian
Published: October 2011

The avermectin wastewater was treated with UASB technique. The paper was focused mainly on the removal rate of COD and the change of ammonia nitrogen of influent and effluent wastewater in the first running stage. At the stable phase of anaerobic operation, the removal rate of COD could be stabilized at 85% when the influent volume load was 9.21 kg/(m3•d), and the effluent COD was about 1400 mg/L. As for ammonia nitrogen concentration of influent and effluent wastewater, in the first 50 days, the former was larger than the latter, after then, it was opposite. In the condition of same volume load but different hydraulic retention time (COD concentration of influent being different), COD removal rate kept almost the same. In the second running stage, the influent COD volume load reached 9.21 kg/(m3•d) at the 16th day, with the COD removal rate being around 87%.
Analysis of Acetone Extract From Shenfu by GC/MS and FTIR
Authors: Ouyang Xiao Dong , Dong Shi Bao , Hu Li Ming , Zong Zhi Min
Published: October 2011

The acetone extracts from Shenfu coal (SFC) of China was filtered into filtrate and cake, and analyzed by GC/MS and FTIR respectively. The results indicate that: The GC/MS identifiable fraction mainly consists of polycyclic aromatics with 2-4 rings and their alkyl derivatives as main components, and polar oxygen compounds with ketones and esters as main components. A variety of nitrogen compounds and several compounds containing phosphor, sulfur, and chlorine were identified. IR spectrum shows that functional groups including hydroxyl, carbonyl, polycyclic aromatic ring, methylene, methyl, etc. are among the main groups of GC/MS unidentified fraction.
Numerical Simulation Investigation of Dust-Controlling Equipment of Main Fan Diffuser of Coal Mine
Authors: Chen Shi Qiang , Wang Hai Qiao , Cheng Jian Lin
Published: October 2011

In order to decrease coal dust pollution of industry square, two types of dust-controlling equipment of main fan diffuser of coal mine are designed by virtue of inertia separation and gravity sedimentation. On the basis of field conditions, the physical models of two equipments are constructed. In application of Computational Fluid Dynamics (CFD), dynamic and kinetic fields of two-phase flow in two equipments are researched. The results show that the application of dust control equipment of main fan diffuser is available approach of decreasing coal dust pollution in industry square of coal mine.
Treatment of Petrochemical Malodorous Gases by Bioﬁlter Packed with Complex Filler
Authors: Zhang Qing Dong , Guo Shao Hui , Zhao Dong Feng , Lv Ming Jie
Published: October 2011

This document discussed a biofilter packing with complex filler, which was inoculated by a kind of toluene-degrading microorganism. The toluene-degrading microorganism(JBJ-3), which was isolated from activated sludge from a wastewater treatment plant of refinery, was classiﬁed as Pseudomonas sp. initially by physiological and biochemical tests. The removal efficiency of JBJ-3 reached to 93.73% for 48h. Complex filler consisted of wood chip, peat and compost etc. It has high amounts of organic matter, high speciﬁc surface area, good water holding capacity, good permeability, varied microbial system, and contains intrinsic nutrients. The complex filler could inoculate Pseudomonas sp. JBJ-3 well. And under the different inlet concentrations of toluene, the overall removal efficiency had reached above 92%. And the bioﬁlter packing complex filler showed a good resistance to shock load.
Microbial Remediation of Atrazine-Contaminated Soil by Rhizobium sp DNS7 and Acinetobacter sp DNS32
Authors: Wang Zhi Gang , Zhang Ying , Guo Huo Sheng , Meng Dong Fang , Wang Yang
Published: October 2011

The uses of herbicides have become an integral part of modern agricultural systems. The intensive use of herbicides atrazine has resulted in serious environmental problems. We researched the microbial Remediation of Atrazine-contaminated soil by Rhizobium sp. DNS7 and Acinetobacter sp DNS32. The results found two strains had a high capability for degrading atrazine in soil and culture medium. The mixed strains was more efﬁcient in the mineralization of atrazine than the isolated strain in soil. The result provided a effective way to remediate atrazine pollution soil.
Integrated Treatment of Domestic Wastewater Using Anaerobic Filter-Constructed Wetland in Military Camps
Authors: Lv Tao , Zhang Wu Long , Zhang Xie , Xue Feng
Published: October 2011

This paper studies through project cases the treatment effect of integrated technique of anaerobic filter and constructed wetland on domestic wastewater in military camps, and the method for preventing the blocking of anaerobic filter and constructed wetland packing. The results show that its average removal rate of COD, NH4+-N, TP and SS is 83.1%, 37.5%, 49.8% and 91.5% respectively, with effluent meeting the standard of Grade II in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002); as planned, two anaerobic filters, one for operation and the other laying fallow at a alternate period of 6 months, in combination of the design of spoil disposal, can effectively prevent the packing layer from being blocked; being preprocessed, anaerobic filter can effectively prevent the packing layer of constructed wetland from being blocked; in case of a certain difference in elevation, the integrated technique can achieve unpowered operation. Besides, it is easy to implement and manage at a low operational cost without professional technician, and can treat decentralized domestic wastewater, therefore, is suitable for camps.
Preparation of Modified Expanded Graphite and its Adsorption Characteristics for Pb (II) and Cr (VI)
Authors: Zhao Ying Hua , Xu Shi Hong , Su Rui Jing , Li Deng Xin
Published: October 2011

A new method to improve the adsorption ability of expanded graphite (EG) was introduced in this paper. EG was modified by nano magnesium hydroxide. Modified expanded graphite (MEG) was characterized by SEM, XRD and FTIR. Then, the removal rate of Pb (Ⅱ) rose to 99% from 60.51% on MEG, and the removal rate of Cr (Ⅵ) could reach at 23.9% from 12.36%.
The Study on the Electrocatalytic Treatment of Dye Wastewater by ACF Cathode
Authors: Hu Jun Sheng , Li Yue , Wang Hui
Published: October 2011

By using ACF as the cathode, acid scarlet 3R as simulated wastewater, the experiment researches into the effect of current density, aeration, electrolyte concentration and the initial pH value on the color removal of wastewater. The results showed that: ACF cathode has a strong adsorption capacity. Oxygen is reduced to H2O2 and other oxidizing substances H2O2 on the cathode surface .Therefore, it has a strong degradation capacity to dye, which is far better than that of the stainless steel cathode; Lower operating current density helps reduce processing costs; Higher electrolyte concentration and aeration is not necessarily better, which follows certain rules; The treatment is effected greatly by the initial pH, and the effect of decolonization in the acidic conditions is better than that in alkaline conditions. When the current density is 6Am/cm², electrolyte concentration is 0.04mol•L-1, aeration capacity is 0.2m3/h, initial pH is 3.5 and the time of treatment is 70min, the decolonization rate of wastewater is 95.30 %.
Experimental Study of Different Material Corona Electrode Absorption with Dusts in Electrostatic Precipitator on the Condition of Low Voltage
Authors: Bai Ming Hua , Zhang Zhi Min , Liu Zhi Qiang , Liu Jing Jing , Li Juan
Published: October 2011

Four main ingredients of the dust and four material corona electrodes were selected from sintering machine electrostatic precipitator (ESP) in this paper, affinity differences of the corona electrode with the four kinds of dusts can be concluded from the experiment on the condition of low voltage. According to the composition of dust to be processed in actual production, corresponding corona electrode and collecting plate materials should be selected to improve the phenomenon of corona electrode surface mast and tip balling and to improve collection efficiency.
Combination of Chlorogenic Acid and Bamboo Charcoal Particles Improve Husbandry Performance and Environment
Authors: Wang Jian Hui , Liu Dong Min , Liu Yong Le , Li Chi Lin , Wang Fa Xiang , Li Xiang Hong , Li Yan
Published: October 2011

The objective of this study was to determine the effects of chlorogenic acid (CA) and bamboo charcoal particles activated by microwave (BCP) on performance, serum urea nitrogen and husbandry environment of broilers. The diets were devoid of antibiotic growth promoters (AGP). Two hundred and forty Avian broilers were allocated to a 2 × 2 factorial experiment involving two levels of CA (0 or 1000 mg CA/kg feed), and two levels of BCP supplementation (0 or 100 mg/kg feed). The diets and water were offered ad libitum. The growth performance and serum urea nitrogen was significantly increased when CA supplemented (P<0.05), while BCP significantly affects the ammonia concentration of the husbandry environment (P<0.05). These results indicate that CA and BCP combination can effectively improve the performance and husbandry environment.
Analysis on Practical Application Problems of SCR Technology In Coal- Fired Power Plants
Authors: Liu Qi Zhen , Sun Yan Jing , Wan Fang
Published: October 2011

Power plants that emit great amounts of nitrogen oxides are the key total mass control part of the “Twelfth Five-Year Plan”. SCR is widely used because the technology is mature and the denitrification efficiency is high. According to the problems of the application of SCR, this paper puts forward relevant suggestions: 1) Combine different flue gas denitrification technologies to raise the denitrification efficiency. 2) Urea is recommended as the reductant considering the safety factors. 3) Issue relevant policies and strictly control the emission of sulfur trioxide.
Removal of Arsenic from Landfill Leachate by Selected Low-Cost Sorbents: An Experimental Study at the Zixiaguan Landfill of Wuhan City, Central China
Authors: Lu Zhi Yan , Guo Qing Hai
Published: October 2011

The leachate from the Zixiaguan landfill of Wuhan City contains a lot of undesirable or toxic chemicals, among which arsenic may have the most serious threat to environment and human health. Lowering the arsenic concentration in the leachate is therefore of extreme importance. In this study, natural sediments obtained from Wuhan City, including clay, silty soil and silty sand, were used as low-cost sorbents to remove arsenic from solution. The results of the batch sorption experiments indicate that the sorption processes of clay and silty sand match well with linear isothermal sorption model, while that of silty soil is in good accordance with Langmuir isothermal sorption model. Among the three sorbents, clay has the best ability for arsenic removal from solution. Further experiments were carried out to determine the optimum sorption conditions for clay sorbent, the results showing that as the ratio of sorbent dosage to solution volume is 25.0 g/L, the reaction time is 120 min, and the pH of solution equals 7.0, the removal rate of arsenic from the leachate by clay sorbent reaches the highest value of 99.3 %.
The Adsorption of Copper Ions by Sodium Alginate Immobilized Bacillus Subtilis Body and Purify Copper of Mine Wastewater
Authors: Guo Jun Jing , Chen Wen Bin
Published: October 2011

In this study, calcium alginate immobilized bacillus subtilis body was used as an adsorbent for the aim of adsorpting Cu(Ⅱ) ions form the aqueous solutions, On sutiable condition, this study use purely bacteria eliminate other bacteria come in life-form bacteria .Through the orthogonal experiment obtains the optimum condition of sodium alginate fossilization bacillus subtilus pellet to the Cu(Ⅱ) adsorption, The biosorption efficiency was strongly influenced by the pH and the initial concentration ofthe Cu(Ⅱ) aqueous solutions. We also discusses the influence of single factor to the sodium alginate fossilization bacillus subtilus pellet to the Cu(Ⅱ) adsorption ,which included pH, contact time, temperature, initial metal ion concentrations and ionic strength in the adsorption process. The adsorption of the adsorbent on Cu(Ⅱ) is related to its concentration . From the research,we know the maximum adsorption rate to the Cu(Ⅱ) is about 83.2%. Using different model to analyse data. The sorption process follows pseudo-second-order kinetics very well,and the correlation coefficients R all reached to 0.9, and the rate constant of this kinetics model for the adsorption processes, k2, increased with the increasing temperatures. The isothermal data could be well described by the Langmuir adsorption isothermal equations．The experimental results showed that heavy metals could be eficciently accumulated by the immobilized bacteria.
Treatment of Chromium-Containing Mine Wastewater with Layered Nanometer Co3O4 Hydroxide
Authors: Xu Guo Xiang , Chen Wen Bin
Published: October 2011

Experiment was made to study heavy metal ion mining wastewater.The effect of Temperature, pH, Initial concentration, coexisting ions and time on the performance of Nanomaterials were investigated. Results showed that removal efficiency of heavy metal ions was higher than 86% after adsorption treatment of containing Cr(VI) mine wastewater, Cr(VI) concentration in permeation liquid was lower than 0.1 mg/L, and the concentration of Cr(VI) ions reaches the first class of irrigation water quality standards , which verified that Nanomaterials is effective for the removal of heavy metal ions, and the concentration liquid can be reclaimed.
The Concentration and the Abatement Strategy of Organic Contaminants in Sewage Sludge Dewatering
Authors: Yu Jie , Zheng Guo Di , Chen Tong Bin
Published: October 2011

Sludge agriculture application in future will be one of the main sewage sludge disposal ways in China. To ensure safety and environment of sewage sludge agriculture application, except to strengthen the research of sludge heavy metal, pathogen outside the organic contaminants will be one of the focuses of the future research, especially to strengthen the PAHs and NP/NPE. In order to reduce the environmental risks of sludge agriculture application, using biological aerobic fermentation processing technology treatment sludge can effectively reduce the organic contaminants, depress secondary pollution problem, which sewage sludge brings.
Treatment of Cr(III) - Containing Wastewater by Continuous Foam Separation
Authors: Wang De Jin , Zhang Yong , Qin Ming Zheng
Published: October 2011

Cr(III)-containing wastewater was treated by continuous foam separation process. The factors affecting the Cr(III) removal efficiency were researched. The optimal operating conditions determined by orthogonal experiments are as follows:wastewater pH 6.50,gas flow 400ml/min,cationic surfactant dosage 50mg/L.When the mass concentration of Cr(III) in the influent is 7.5mg/L,the effluent can meet the national discharge standard with 98% of Cr(III) removal rate for continuous running. The kinetic experimental results show that the foam separation of Cr(III) accords with the first order kinetic equation. The results of continuous experiments in a scale-up foam separation column indicate which reach the Second Wastewater Discharge Standard of Country.
Study of Ballast Water Micro-Algae Inactivation Using High-Voltage Pulsed Discharge: Discharge Characteristics
Authors: Su Peng Hao , Feng Dao Lun , Liao De Xiang , Ma Yi Ping , Xu Le Ping
Published: October 2011

Treatment technology for ballast water is in need. High-voltage pulsed discharge has great potentiality to inactivating micro-algae living in ballast water. In this study, effects of discharge reactor parameters and ballast water parameters to discharge characteristics were studied, the efficiency of the micro-algae inactivation was confirmed preliminarily, and the principle of designing discharge reactor parameters was discussed. The main conclusions are: UP increased with the increasing of d, while decreased with the increasing of r; IP increased with the increasing of r, while decreased with the increasing of d; UP and IP both increased with the increasing of U. E decreased with the increasing of d; when d=2mm, the value of E was far larger than that of d≥6mm; when d was 2mm，larger r, larger E; when d was between 6-20mm, larger r, smaller E. The optimized structure of discharge reactor should be r=3mm and d=6mm. Up increased with the increasing of Q while decreased with the increasing of T. η increased with the increasing of U and d, decreased with the increasing of r.
Experimental Study on Factors for the Capability of Ca-Based Absorbent for CO2-Capture
Authors: Chen Hong Wei , Wei Ri Guang , Mei Jian , Gao Jian Qiang , Wang Chun Bo
Published: October 2011

In order to find the factors and their effects for the Ca-based absorbent for CO2-capture, the experimental method was used to research the limestone in the calcination/carbonation fixed bed process. Then measured the specific surface and specific pore volume respectively by the method of COULTER_SA_3100 nitrogen absorption specific surface and the method of BET and BJH through pore size analyzer. The result has showed that the microstructure of absorber and conversion ratio of carbonation X was affected by the operating parameters including calcination temperature (Tcal), CO2 concentration in calcination atmosphere, variable cyclic number N and carbonation temperature (Tcar). In this experiment, X reached its maximum when Tcal was 850°C, with the calcination temperature continued to rise, X reduced gradually. The increase of the concentration of CO2 will strengthen the role of sintering and reduce X in the calcination atmosphere. With the increase of the cyclic number N, sintering effect made the micro-structure of absorbent change, so that X decreased. Tcar close to the limit temperature was appropriate. In the limited temperature range, with the increase of N, conversion ratio of carbonation X declined slowly.
Retartation Performance to Pollutants of Antiseepage Slurry for Waste Landfill Sites
Authors: Jing Xiang Dang , Yu Bo , Xie Jun Ge
Published: October 2011

Based on self-developed bentonite - fly ash - cement（BFC）slurry and flexible wall permeameter, infiltration test was conducted on slurry concretion samples of different height using heavy metal ions Solution and leachate from waste landfill site. Test proved that as a result of the infiltration deposition and adsorption residence performance, retardation by slurry concretion happened in about 30mm of initial infiltration to 95% of heavy metal ion pollutants(Hg, As, Pb, Cr, Cd etc.) and 60% of waste leachate pollutants (NH4-N, TN, TP, CODCr, BOD5 etc.). Moreover, blocking rate for all pollutants presents an increasing trend along with the increase of the height of slurry concretion samples in a defined way.
Treatment of Waste Cutting Oil Emulsions by Leaching Solutions of White Mud
Authors: Wu Tao , Sun De Jun , Li Yu Jiang , Zhang Guo Chen
Published: October 2011

A leaching solution of white mud was prepared from this waste material of soda production, and used for treatment of waste cutting oil emulsion. In alkaline conditions, the leaching solution of white mud generates hydroxide precipitates, which have relatively high specific surface area and excess surface energy, and readily adsorb the pollutants in waste cutting oil emulsion. The chemical composition of the white mud was determined and the hydroxide precipitates were characterized. The maximum removal efficiency (of turbidity, oil contents and TOC) was obtained at an adsorbent dosage of 4.0 g/L, pH 12.0 and 25°C. Leaching solutions of white mud could be used as an effective and low-cost material for treatment of waste cutting oil emulsion by the precipitation method.
Multi-System Phytoremediation on Oil-Contaminated Alkaline Soil in Daqing Oilfield
Authors: Dai Chun Lei , Chen Li Sha , Liu Xiao Yan , Hu Yan , Liu Shan Shan
Published: October 2011

Daqing oilfield; oil-contaminated soil; alkaline soil; multi-plant system; phytoremediation Abstract: Daqing oil-contaminated alkaline soil and high concentrations oil-pollutant samples were mixed at the ratio of 4:1, 2:1, 1:1 and 1:2 (vsoil/voil), respectively. Then the oil content of the mixed samples were detected and analyzed after phytoremediation experiment with multi-plant systems. The research results showed that Salsola collina Pall-Chinese wildrye-Thistle Herb-Medicago-Artemisia ordosica multi-plant system had a good degradation effect on oily-pollutants. During the 105-day experiment, the degradation rate of oil-pollutants could be up to 80.5% in the mixed soil (4:1, vsoil/voil). During the whole experiment, removal rate of total petroleum hydrocarbons (TPHs) could raise up 65.5% in the Coronilla varia-Lolium perenne-Amaranthus hypochondriacus multi-plant system mixed soil (2:1, vsoil/voil). Experimental results proved that the degradation effect on TPHs could be improved by the multi-plant systems and they could be reasonably matched to cure and restore the ecological environment of oil-contaminated soils.
Corrosion Behaviors of 0Cr18Ni9 Stainless Steel under the Combination Action of Sulfate-Reducing Bacteria and V.natriegens
Authors: Gu Cai Xiang , Zhao Xiao Ming , Yin Yan Sheng , Ji Gui Jun
Published: October 2011

Advantage strains SRB and V.natriegens were obtained from the China East Sea for this study. Polarization curves, corrosion potential, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses were adopted in order to investigate the corrosion behaviors of 0Cr18Ni9 stainless steel under the combination action of anaerobic SRB and facultative anaerobic V.natriegens, The characteristics and mechanisms of microbial corrosion action in sea water were analyzed in this paper. The results show that SRB and V.natriegens promote each other’s growth when cultivated in the mixed microbe medium, in which the rate of corrosion is higher than that in the single microbe; Under the combined action of the mixed microbe, the microbial film gets wider and thicker, and corrosion products and metabolite are produced, which furthermore accelerates the passivation and pit corrosion to the 0Cr18Ni9 stainless steel.
A Fuzzy Comprehensive Assessment System for Agricultural Soil Pollution Based on GIS
Authors: Zou Zhi Wen , Zhang Li Qiang , Chen Ji Ming
Published: October 2011

Aiming at the necessary of the research about agricultural soil pollution, fully integrated real monitoring results of agricultural soil pollution, combined with the theory of fuzzy mathematical analysis and geographic information systems technology, the main purpose of the fuzzy comprehensive assessment system is to reveal the formation, dynamic changes of agricultural soil pollution and the movement of pollution, providing effective management decision for agricultural soil pollution prevention and planning management.
Treatment of Pharmaceutical Wastewater by Micro-Electrolysis and Fenton Oxidation Process
Authors: Huang Chong Hao , Cao Meng Xing , Luo Jun Hong , Zhang Chao
Published: October 2011

Pharmaceutical wastewater was treated by micro-electrolysis and Fenton process.The aim of this research was to optimize operating parameters in micro-electrolysis and Fenton process. Effectiveness of important process parameters such as mass ratio of iron to carbon, the initial pH, reaction time and H2O2 dosage on the performance of micro-electrolysis and Fenton process were investigated. The results show that the removal efficiency of pharmaceutical wastewater chemical oxygen demand (COD) could reach 37.3% at the optimal pH of 4 with the iron to carbon ratio of 1:1 after 80 min treatment. The operating conditions of Fenton process are 0.5% of H2O2 dosage, the pH value of 4 and the reaction time of 180 min. The pharmaceutical wastewater COD removal could reach 79.4%.
NaNO2/Fe3+/O2 System Catalyzed Wet Air Oxidation of Reactive Brilliant Blue KN-R
Authors: Dong Xiao Li , Dong Xue Wei , Zhang Xin Xin , Ma Hong Chao
Published: October 2011

Subscript textThe degradation of Reactive Brilliant Blue KN-R by NaNO2/Fe3+/O2 system was evaluated. The optimal conditions of dye degradation by the NaNO2/Fe3+/O2 system were: reaction temperature 150°C, oxygen partial pressure 0.5Mpa, pH 3.0, Reactive Brilliant Blue KN-R /NaNOSubscript textSubscript text2/FeCl3 (mole ratio) equal to 1:2:0.2.Under the optimal conditions, the removal rates of color 、COD and TOC were 100% 、64% and 52%, respectively.
Removal of Gas-Phase Elemental Mercury by Bromine-Impregnated Activated Carbon
Authors: Wu Jiang , Chen Jie He , Zhang Shuai Bo , He Ping , Fang Ji Hui , Wu Ye Cheng
Published: October 2011

Br-impregnated activated carbon for gas-phase elemental mercury adsorption experiments were carried out at a fixed-bed system to get the suitable mass fraction of KBr impregnation solution. Hg removal efficiency of 1% wt KBr-ACs was 69.0%, while that of 10% wt KBr-ACs was 57.9%. Both of them were higher than that of the raw activated carbon, 42.2%. The removal efficiency of Hg0 was not proportional to bromine concentration. Under 80-180°C, Hg removal efficiency of 1% wt KBr-ACs were 68.3%-71.8%, and at 140°C it reached the highest due to the increasing chemical adsorption ability of the functional groups which was on the surfaces of activated carbons by impregnating. At 160°C, Hg removal efficiency was lower than that at 140°C due to desorption making physical adsorption decrease, so that the total adsorption decreased.
Removal of Phenol by a New Emulsion Liquid Membrane System and its Heat-Induced Demulsification
Authors: Peng Wei , Xu Chun Jian
Published: October 2011

Removal of phenol from aqueous solution by a new emulsion liquid membrane (ELM) system and its heat-induced demulsification have been investigated. The ELM consists of commercial kerosene as organic solvent, OP-4 as surfactant agent, hydrochloric acid as the stripping phase. Effect of different operating parameters such as internal phase concentration, surfactant concentration, stirring speed, PH value in external phase, volume ratio of membrane phase to internal phase and volume ratio of membrane phase to external phase were investigated for the removal of phenol from aqueous solution. At the optimum condition about 95.7% phenol is removed in less than 20min of contact time. The demulsification efficiency was investigated under different temperature and time and proved to be high at 80°C.
An Efficient Removal of Rhodamine B in Water by Targeted Adsorption on SnS2 Nanosheets
Authors: Li Xi , Zhu Jian , Lv Fu Jian , Wang Jin Guo , Xie Zong Li , Hoang Manh , Li He Xing
Published: October 2011

Two kinds of SnS2 materials were prepared through the hydrothermal route, respectively using thioacetamide (TAA) and thiourea as the sulfur source. The as-prepared SnS2 samples were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2-sorption. The results showed that the SnS2 sample prepared with TAA had a lengthening shape, a smaller size and surface area, but a better adsorption of rhodamine B (RhB). X-ray photoelectron spectroscopy (XPS) analysis was used to confirm that there was an interaction between RhB molecule and SnS2 contributing to the strong adsorption of RhB.
Established the Evaluation Index System of Food Security in State Farms of Heilongjiang Province
Authors: Sun Bao Min
Published: October 2011

At present, there are still a number of global population faces food crisis in the background of food security. Many developing countries are fighting the food crisis in a different way in particular. Food security is related to our life, the rapid development of our countries, and formulates long-term development strategy of national. This paper has established the evaluation index system of food security in state farms of Heilongjiang province from six aspects.
A Novel Approach to Recycle the Waste Plastics by Bitumen Modification for Paving Application
Authors: Naskar Moumita , Chaki Tapan Kumar , Reddy Kusum Sudhkar
Published: October 2011

Recycling of waste plastics (WP) denotes an effectual method to dispose the post-consumer products for possible alternative way to obtain new materials with good properties. With this aim the influences of WP and maleic anhydride (MA) grafted WPs (MA-g-WP) were investigated as the bitumen modifiers for paving applications. Fourier transform infrared (FTIR) spectroscopy analysis established the effective grafting of MA with the waste plastic (WP). Polymer modified bitumen (PMB) binders were analyzed under scanning electron microscopy (SEM) and optical microscopy (OP) in an effort to characterize the bitumen/modifier interphase morphology. The conventional rheological tests such as penetration test, softening point, and ductility results indicate that the degree of polymer modifications are function of the nature of modifier, bitumen–modifier compatibility, and modifier concentration. It has also been confirmed that the morphology observed by SEM and optical microscopy revealed the compatibility between MA-g-WP and bitumen, and the storage stability of binder was improved significantly compared with WP modified bitumen (WPMB) binders. Consequently, the use of grafted modifier with polar site can be considered as a suitable alternation for modification of binder in pavement by expecting their chances for better performance during service.
Mechanism and Structural Analysis of the Thermal Activation of Coal-Gangue
Authors: Zhang Chi , Yang Xiao Yi , Li Yong Feng
Published: October 2011

This paper presents a study of the thermal activation of coal-gangue. The samples were tested and analyzed using Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Magic Angle Spin Nuclear Magnetic Resonance (MAS NMR), Scanning Electron Microscopy (SEM), and Atomic Emission Spectroscopy (ICP-AES). Results indicate that the degree of coal-gangue activation varies with variations in the phase structure and coordination of aluminum at different temperatures.
The Photocatalytic Degradation of Methylene Blue Wastewater with Nanoscale Ferric Oxide as Catalyst
Authors: Zhu Yi Ren , Li Guang Chao , Zhang Qian Ping , Tang Chong
Published: October 2011

Nanoscale Ferric Oxide was prepared from natural hematite and characterized. Using it as catalyst, methylene blue-simulated wastewater was treated by photocatalytic degradation with high-voltage mercury lamp and sunlight as excitation light source. Main factors, including the preparation conditions and dosage of ferric oxide, pH value, reaction time and initial concentration of simulated wastewater, and their influence to treatment effect were discussed. Test results showed that at a pulverization time of 1.5h, calcination time of 2h at 500°C, initial methylene blue (MB) concentration of 20mg/L, pH=2 and a ferric oxide dosage of 0.01g/30ml, for both high-voltage mercury lamp and sunlight, MB wastewater was degraded effectively in lab-scale experiment; after 5h’s radiation, MB concentrations were reduced from 20mg/L to 0.51mg/L and 9.18mg/L respectively. With sunlight as the radiation light source, an enlarged experiment was done on a custom-built device, and MB concentration was reduced from 20mg/L to 0.11mg/L, which was significantly better than treatment results from lab-scale experiments and UV radiation. MB photocatatytic degradation reactions at different initial concentrations were in accordance with Lagergren’s pseudo-first-order kinetic equation. Spectral analysis of degradation products showed that MB molecules were degraded to inorganic ions.
Studies on Electrochemical Hydrodeiodination Mechanism of 2-Iodobenzoic Acid on Cu Electrode by in-Situ FTIR Spectroscopy
Authors: Hong Shi Xiao , Chao Li Mei , Na Zhu Jing
Published: October 2011

Abstract. Electrochemical hydrodeiodination of 2-iodobenzoic acid in NaOH solution was investigated using cyclic voltammetry. Compared with Ti and Pt electrodes, Cu electrode exhibited good electrocatalyitc activity for the electroreduction of 2-iodobenzoic acid. In situ FTIR results suggested that the mechanism of the reaction was electrochemical hydrodeiodination process. 2-Iodobenzoic acid was electroreduced to its free radical ion after receiving an electron firstly. Then the free radical ion was further deiodinated to produce benzoic acid free radical at more negative potential. After receiving another electron and proton, benzoic acid was obtained.
Study on the Advanced Treatment and Reuse of Dyeing Wastewater Using Polyamide Nanofiltration Membrane
Authors: Ma Jiang Quan , Zhang Qi , Lu Qing Ling , Gan Xiao Bing , Xia Jun Hao , Shen Zi Ding
Published: October 2011

The microfiltration (MF) and nanofiltration (NF) integrated membrane technologies were used in the advanced treatment of dyeing wastewater. The ZrO2 MF membrane was used to remove colloidal species from the wastewater before NF. The effects of permeate flux, CODCr rejection, the removal effects of ammonia nitrogen and total phosphorus by polyamide NF membrane were investigated. The results indicated that the turbidity removal efficiency was 76.7%~95.0%. CODCr rejection was range from 33.3% to 54.9% by MF. After the process of NF, CODCr rejection was between 66.65% and 91.18%. The removal effects of both color and turbidity were 100%. The value of pH was 6~7. The CODCr was smaller than 60mg•L-1. The value of ammonia nitrogen was smaller than 7mg•L-1. The value of total phosphorus was smaller than 0.5mg•L-1. It came up to the quality standard of recycling raw water for industrial uses. It can be used as the water for industrial.
Research on Recycling Method of Discarded PCB Based on Cost-Profit Model
Authors: Li Yuan , Song Shou Xu , Liu Guang Fu , Liu Tao
Published: October 2011

The efficient reclamation of printed circuit board (PCB) is of important significance to environmental protection, optimal configuration of resources and development of circulation economy. In the paper, several important physical mechanical recycling strategies of PCB were analysed, and a cost-profit evaluation model for these recycling strategies was established to evaluate reclamation profit quantitatively. With one specific recycling example, an accurate economic analysis of it was given by the use of the evaluation model. Finally, the best recycling strategy of the mainboard was acquired and some suggestions were given to improve the reclamation economy.
High Turbidity Mine Water Treated by Magnetic Flocculation
Authors: Guo Jian Dong , Li Xiang Dong , Wu Guo Jun , Wang Zhi Chao , Song Jun Ke , Feng Qi Yan
Published: October 2011

In the paper, magnetic flocculation was used in high turbidity mine water treatment. The results show that the magnetic flocculation is one of efficient methods in removing the COD and SS of high turbidity mine water. It finds the optimal conditions: the PAFC was 30mg/L and added with the fast stirring speed being 250r/min for 2min; then, 50mg/L magnetic particle was added with slow stirring speed staying 50r/min for 7min. The wastewater is treated under the optimal condition, the removal efficiency of SS and COD reached 94% and 71% respectively.
Study on Preparation of Water Treatment Ceramic Particles by Using Sludge and Fly Ash and the Ceramic Particles’ Application
Authors: Xu Hui , Shao Qun , Zhou Jia , Ma Xiao Cheng
Published: October 2011

Water treatment ceramic particles were prepared using dewatered life sludge in Huainan No.1 Sewage treatment plant and power plant fly ash as main materials and clay as the bond. Through the L9 (43) orthogonal test, we obtained the best conditions of the preparing process. The product can be used as water treatment packing ceramic particles and simulated adsorption experiment with the wastewater including Pb2 + was conducted. The results indicate that ceramic particles (used as wastewater treatment filler) bibulous rate is 25.0%, the loose density is 690kg/m3, the particle density is 1240kg/m3, specific surface area is 5.997m2/g, the compressive strength is 9.40MPa and the adsorptive performance is excellent. The toxic metal leaching experimental result shows that the concentration of toxic heavy metals in leaching solution is in the range of GB specification and the performance of product is stable which will not cause second pollution.
Research in Key Technologies of Organic Solid Waste for Energy
Authors: Meng Fan Sheng , Yuan Hao Ran
Published: October 2011

In this paper, the characteristics and the present disposal state, trend of organic solid waste have been described. Four new technologies of organic solid waste energy utilization were proposed and the technical principles, features, contents and progress of these technologies were analyzed, respectively.
Effect of Surfactants on the Adsorption of Fluazinam in Soils
Authors: Luo Ai Lan , Liu Xian Jin
Published: October 2011

Soil contamination with pesticide has caused critical environmental and health defects and increasing attention has been paid for developing innovative technology for cleaning up this contamination. In this study, the effects of cationic surfactant cetyl trimethyl ammonium bromide, anionic surfactant sodium dodecylbenzenesulfonate, and non-ionic Tween 80 on the adsorption of fluazinam at the concentration of 1/2 CMC, 1 × CMC and 2 × CMC in three soils were evaluated by using batch equilibrium experiment. The K values followed the order as: S1 > S2 > S3 in absence of surfactants. The use of a nonionic surfactant considerably weaken the fluazinam retention, while that of cationic surfactant has the reverse trend. The effects of anionic surfactant on the adsorption of fluazinam in soils is related to soil physicochemical properties and anionic surfactant concentration. These results are of practical interest in developing effective surfactant remediation technology for fluazinam contaminated soils.
Zeolite Synthesis from Brazilian Coal Fly Ash for Removal of Zn2+ and Cd2+ from Water
Authors: De Carvalho Izidoro Juliana , Fungaro Denise Alves , Wang Shao Bin
Published: October 2011

A Brazilian fly ash sample (CM1) was used to synthesize zeolites by hydrothermal treatment. Products and raw materials were characterized in terms of real density (Helium Pycnometry), specific surface area (BET method), morphological analysis (SEM), chemical composition (XRF) and mineralogical composition (XRD). The zeolites (ZM1) from fly ash were used for metal ion removal from water. Results indicated that hydroxy-sodalite zeolite could be synthesized from fly ash sample. The zeolite presented higher specific surface area and lower SiO2/Al2O3 ratio than the ash precursor. The adsorption showed that cadmium is more preferentially adsorbed on ZM1 than zinc. The adsorption equilibrium time for both Zn2+ and Cd2+ was 20 hours in a batch process. The adsorption isotherms were better fitted by the Langmuir model and the highest percentages of removal using ZM1 were obtained at pH 6 and 5 and doses of 15 and 18 g L-1 for Zn 2+ and Cd2+ , respectively. Thermodynamic studies indicated that adsorption of Zn2+ and Cd2+ by ZM1 was a spontaneous, endothermic process and presented an increase of disorder at the interface solid/solution.
Degradation of Hydroquinone by Pulsed Corona Discharge Combined with Ozone Process
Authors: Zheng Hong Ai , Liu Jian She , Pan Li Li
Published: October 2011

Owing to toxicity of pharmacy wastewater to microbe, commonly used biodegradation is often limited in application; accordingly exploiting new ways of the wastewater treatment with high efficiency is a hot topic. As a new efficient advanced oxidation, pulsed corona discharge combining with ozone is attracting more and more attention. In this study, a special reactor was designed, in addition, the removal of TOC(Total Organic Carbon) and COD (Chemical Oxygen Demand)of simulant pharmacy wastewater containing hydroquinone (500mg/L) by pulsed corona discharge combining with ozone were investigated . It was showed that the TOC and COD removal (53.8% and 72.3%) by the combined technology was much higher than by using the two techniques in series when all the samples were treated 40mins.The two methods in combination have a synergistic effect. TOC and COD removal could be improved obviously when NaCl feed concentration increased from 0 to1000 mg/L, yet further increase in NaCl feed led to a markedly decrease removal efficiency of TOC and COD.
Steam and Autoclave Treatments on Structure Characteristics of Steel Slag
Authors: Zhao Qing Lin , Stark Jochen , Freyburg Ernst , Zhou Ming Kai
Published: October 2011

Together with the chemical analysis as well as XRD and DTA, effects of steam and autoclave treatments on structure characteristics of basic oxygen furnace slag (BOFS) and electric arc furnace slag (EAFS) are investigated. The results show that steam and autoclave treatments on slag contribute to the conversion of f-CaO and f-MgO to Ca(OH)2 and Mg(OH)2 ,which improve the volume stability of slag by reducing the contents of free lime and periclase, and the autoclave treatment is more effective. Meanwhile, for the utilization of steel slag, the effects on the volume stability by CaO and MgO that were wrapped in eutectic in the crystallite form should be a key factor, besides the contents of f-CaO and coarse periclase crystalline. The thermal reactivity of slag treated by steam and autoclave increased, especially the reactivity of elemental iron and wuestite. The reactivity of EAFS increased more significantly at high temperature due to its higher content of iron.
Efficiency-Led Office Waste Recycling System
Authors: Sun Fan , Wang Yu Bo
Published: October 2011

The waste of office is a major source of municipal solid waste. Taking the imperfect and poor-running recycling system into account, we may start with establishing a pilot recycling system in China’s urban areas, in the hope of exploring its organizational and operational mechanisms. A questionnaire-based survey among the office staff is implemented. According to the results, this paper preliminarily proves the feasibility of setting up an efficiency-led office waste recycling system. What’s more, the framework and operational mechanism of a new pilot recycling system is designed.
Study on Coking Wastewater Treatment by Iron-Carbon Internal Electrolysis Method
Authors: Hao Su Ju , Jiang Wu Feng , Tian Wei , Zhang Yu Zhu
Published: October 2011

Coking wastewater is the poisonous wastewater with complicated components produced in the coking process and it is difficult to be degraded. The paper studies the static treatment effect of metallization pellet with high carbon (MPHC), sponge iron, 45＃steel chips and cast iron chips on coking wastewater. And the four substances are characterized by scanning electron microscope (SEM). The results indicate that the degradation performance of MPHC on coking wastewater is higher than that of sponge iron, 45＃steel chips and cast iron chips. There are abundant pores on MPHC, and the activated carbon has strong adsorption capacity, and it can adsorb the organic pollutants on the surface of primary battery, and promotes the progress of iron-carbon internal electrolysis reaction.
Study on Coking Wastewater Treatment by Fixed Bed of Metallization Pellets with High Carbon
Authors: Jiang Wu Feng , Hao Su Ju , Ling Yun Han
Published: October 2011

Coking wastewater produced in the coking process is poisonous and difficult to be degraded. Coking wastewater was treated by fixed bed reactors of metallization pellets with high carbon (MPHC). In this paper, it studies the effect of removing phenols, cyanide, chemical oxygen demand（COD）and ammonia nitrogen in coking wastewater by MPHC. The results show that MPHC has good degradation effect on phenols and cyanide in coking wastewater, and the degradation rate reaches to 99.88% and 99.81% respectively; and has certain degradation effect on COD, the degradation rate is 70.61%; has poor degradation effect on ammonia nitrogen. The results of FT-IR indicate that the degradation of organic pollutants in coking wastewater by MPHC is not simply adsorption, but is removed completely.