Search query: remove malachite green from water

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abstract: Environmental pollution on a global scale is the greatest problem faced by chemical scientists in the 21st century. Therefore an increasing number of the scientists are looking for a new photo catalytic system to find the solution. Existing photo catalytic systems are effective for the decomposition of many unwanted organics through the use of efficient semiconductor photo catalyst activated by ultra violet (UV) irradiation. By reducing the band gap energy of semiconductor, the wave length of light increases, it shifted from UV region to visible region. So the demand for usage of sunlight (visible light) activated photo catalytic systems is increasing rapidly. The purpose of this work was to investigate the degradation potential of doped TiO2/Mg under visible light. The catalyst was prepared by sol gel method. It had been shown that it is possible to deposit TiO2/Mg on glass and could be operated in a continuous mode. The malachite green (MG) present in waste water was aimed to study. The photo catalytic efficiency of synthesized catalysts was evaluated by the degradation of malachite green (MG) in solution under visible light irradiation. The experimental results indicate that the decolourisation of dyes is effective in the presence of catalyst. Photo decolourisation is increased with decreasing flow rate of dye and by increasing the light intensity. The colour removal of MG is very effective by maintaining pH at 9 and pH 5 respectively. As the initial concentration of dye increases, the rate of colour removal decreases. It has been showed that the doped catalysts have better photo catalytic activity under visible light.
author_names: R Vijayaram

Kirubanandhan Lokeshwaran

M M Kabeesvar
title: Photo Catalytic Activity of Visible Light Sensitive Doped TiO2 Nano Catalyst to Remove Malachite Green in Waste Water
year: 2020

abstract: Abstract Application of cetyltrimethylammonium bromide (CTAB) modified multi component biosorbent composed of pine, oak, hornbeam and fir sawdust biomasses was investigated to remove Malachite green (MG) as a model pollutant from aqueous solution. The effects of pH, dye concentration, biosorbent amount and contact time on the biosorption performance were explored in a batch biosorption system. The biosorption isotherm data were analyzed using Freundlich, Langmuir, Sips and Dubinin Radushkevich models while the kinetic data of biosorption were modeled with the pseudo first order, pseudo second order, Elovich, logistic and intra particle diffusion models. These studies showed that Sips isotherm and logistic model fitted well to the dye biosorption data. The maximum biosorption capacity of biosorbent was calculated to be 52.610 mg g 1 at the optimized conditions. Thus, the CTAB modified multi component sawdust biomass can be employed as cost effective and ecological friendly biosorbent in the treatment of industrial effluents containing such unsafe pollutants.
author_names: Fatih Deniz

Remziye Aysun Kepekci
title: Bioremoval of Malachite green from water sample by forestry waste mixture as potential biosorbent
year: 2017

abstract: This study aimed to investigate the efficiency of 3A zeolite as a novel adsorbent for removal of Rhodamine B and Malachite green dyes from water samples. To increase the removal efficiency, effecting parameters on adsorption process were investigated and optimized by adopting Taguchi design of experiments approach. The percentage contribution of each parameter on the removal of Rhodamine B and Malachite green dyes determined using ANOVA and showed that the most effective parameters in removal of RhB and MG by 3A zeolite are initial concentration of dye and pH, respectively. Under optimized condition, the amount predicted by Taguchi design method and the value obtained experimentally, showed good closeness (more than 94.86% Good adsorption efficiency obtained for proposed methods indicates that, the 3A zeolite is capable to remove the significant amounts of Rhodamine B and Malachite green from environmental water samples.
author_names: Mashaallah Rahmani

Massoud Kaykhaii

Mojtaba Sasani
title: Application of Taguchi L16 design method for comparative study of ability of 3A zeolite in removal of Rhodamine B and Malachite green from environmental water samples.
venue: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
year: 2018

abstract: Pallavi kumari and Amar kumar Chemical engineering department BIT Sindri Dhanbad Abstract The removal of basic dye such as malachite green from the synthetic wastewater was experimentally investigated using combined effect of EC and adsorption technology called a three phase three dimensional electrode reactor(TPTDER) The experimental results are expressed in terms of the removal efficiency of the dye molecules, which shows that the TPTDER could efficiently remove the dye molecules from the aqueous solutions. The removal efficiency reached as high as about 99% for an initial malachite green dye concentration in the range of 100 500 mg/l by TPTDER for 10 min at 12 V cell voltage and at specific airflow conditions.
author_names: Pallavi Kumari

Sindri Dhanbad
title: A new in built recirculation mode electrolytic reactor for enhancement of the removal of malachite green dye from the waste water
year: 2020

abstract: The development of new biomaterials for the remove of organic contaminants from wastewater has attracted much attention over the few past years. One of the most cost effective approaches is to produce new high value biomaterials from low value solid agricultural biowastes. In this work, sugarcane bagasse and agricultural waste rich in reducing sugars, acted as both a green bioreductant for graphene oxide (GO) and a sustainable supporter for the immobilization of Burkholderia cepacia. Therefore, this new biomaterial which contained both reduced graphene oxide (RGO) and Burkholderia cepacia, was cable of initial adsorption of malachite green (MG) and its subsequent biodegradation. After 60 h, immobilized Burkholderia cepacia degraded more MG (98.5% than a cell cultured Burkholderia cepacia (87.7% alone. Raman spectroscopy confirmed that GO was successfully reduced by bagasse and that consequently a composite (B RGO) was prepared. SEM indicated that Burkholderia cepacia was well immobilized and kinetics studies showed that the adsorption of MG onto the developed composite fitted a pseudo second order kinetics model (R2 0.99) Biodegradation of MG, was confirmed by the detection of appropriate degradation products such as N, N dimethylaniline and 4 (Dimethylamino) benzophenone using GC MS, UV and FT IR, and via best fit first order biodegration kinetics. Furthermore, a response surface methodology (RSM) was applied to the removal process by varying four independent parameters using a Box Behnken design (BBD) Optimum MG removal (99.3% was achieved at 31.5 degC, with an initial MG concentration of 114.5 mg L 1, initial pH of 5.85, and an adsorbent dosage of 0.11 g L 1. The excellent removal efficiency indicated that agricultural waste derived reduced graphene oxide bio adsorbents have significant potential for the removal of dyes such as MG from industrial wastewaters.
author_names: Beibei Li

Li Gan

Gary Owens

Zuliang Chen
title: New nano biomaterials for the removal of malachite green from aqueous solution via a response surface methodology.
venue: Water research
year: 2018

abstract: A surfactant mediated cloud point extraction (CPE) procedure has been developed to remove color from wastewater containing malachite green using Triton X 100 as non ionic surfactant. The effects of the concentration of the surfactant, temperature and salt concentration on the different concentrations of dye have been studied and optimum conditions were obtained for the removal of malachite green. The concentration of malachite green in the dilute phase was measured using UV Vis spectrophotometer. It was found that the separation of phases was complete and the recovery of malachite green was very effective in the presence of NaCl as an electrolyte. The results showed that up to 500 ppm of malachite green can quantitatively be removed >95% by CPE procedure in a single extraction using optimum conditions.
author_names: Nahid Pourreza

Shahla Elhami
title: Removal of malachite green from water samples by cloud point extraction using Triton X 100 as non ionic surfactant
year: 2010

abstract: Abstract A highly effective Iron Metal Framework photocatalyst (MIL 68(Fe) has been successfully prepared via a facile solvothermal method under acidic condition. The UV vis diffuse reflectance spectrum reveals that the absorption edge of MIL 68(Fe) is 440 nm. The flat band potential of MIL 68(Fe) is 0.6 V vs. NHE at pH 6.8, which is more negative than the redox potential of Cr(VI)/Cr(III) +0.51 V, pH 6.8) Consequently, it is thermodynamically permissible for the transformation of photogenerated electrons to the Cr(VI) to produce Cr(III) Moreover, MIL 68(Fe) could perform as an efficient photocatalyst towards the reduction of Cr(VI) aqueous with a wide pH range. After 5 min of visible light illumination (l 420 nm) almost 100% Cr(VI) can convert to Cr(III) with (NH 4 2 C 2 O 4 as a scavenger (pH 3) which is also higher than that of N doped TiO 2 (50% and ZnO (7.6% under identical conditions. Furthermore, MIL 68(Fe) is proved to perform as a highly efficient photocatalyst for remove of different aqueous contaminant with malachite green (MG) as a scavenger. Finally, a possible reaction mechanism has also been investigated in detail.
author_names: Fenfen Jing

Ruowen Liang

Jinhua Xiong

Ruigen Chen

Shiying Zhang

Yanhua Li

Ling Wu
title: MIL 68(Fe) as an efficient visible light driven photocatalyst for the treatment of a simulated waste water contain Cr(VI) and Malachite Green
year: 2017

abstract: In this study, our group grafted 2 acrylamido 2 methylpropane sulfonic acid (AMPS) onto the surface of hollow glass microspheres (HGM) and successfully prepared AMPS grafted floating adsorbent (AFA) The prepared AFA carries a large amount of negative charges, and the adsorptions of cationic dyes are achieved under the action of strong electrostatic interaction. Furthermore, due to the unique shell structure of AFA, it has a stable self floating ability, which may change the traditional separation method to make the adsorbent easier to enrich and separate from water surface. Characterizations of AFA by scanning electron microscope, energy dispersive spectrometry, X ray photoelectron spectroscopy. Fourier transform infrared spectra, Brunauer Emmett Teller surface areas, thermogravimetric analysis, and X ray diffractometer shows the successful grafting of AMPS. Adsorption experiments confirmed that the adsorption capacities of AFA for methylene blue, malachite green, basic fuchsin and crystal violet under optimum conditions were 436.8 mg g 1, 637.6 mg g 1, 457.8 mg g 1, and 399.4 mg g 1, respectively. At the same time, AFA has excellent recyclability, and its adsorption capacity can be maintained after 6 cycles of reuse.
author_names: Yanyan An

Huaili Zheng

Xinyu Zheng

Qiang Sun

Yuhao Zhou
title: Use of a floating adsorbent to remove dyes from water: A novel efficient surface separation method.
venue: Journal of hazardous materials
year: 2019

abstract: The magnetic magnesium silicate composite (Fe3O4@MgSi) with efficient removal of Cu(II) and malachite green (MG) from aqueous solution were synthesized by hydrothermal approach. The synthetic flower like particle size was about 2 3 mm. In the process of exploring the adsorption conditions, the isotherms were found to be well fitted by Langmuir, Freundlich, and isotherm kinetics in accord with the pseudo second order model. In addition, the maximum adsorption capacity was 2198 mg*g 1 when the Cu(II) concentration of 800 mg*L 1. These results indicated that Fe3O4@MgSi can be used as a superadsorbent and recyclable adsorbent to effectively and rapidly remove Cu(II) and MG pollutants from industrial wastewater or drinking water.
author_names: Huandong Liu

Zunli Mo

Li Li

Fang Chen

Qijun Wu

Lei Lei Qi
title: Efficient Removal of Copper(II) and Malachite Green from Aqueous Solution by Magnetic Magnesium Silicate Composite
year: 2017

abstract: Zeolite imidazolate frameworks (ZIFs) exhibit great potential for organic pollutant removal from water by adsorption. However, it is difficult to remove nanosized ZIFs after adsorption. Here, well dispersed ZIF 8 is successfully grown onto porous carbons by an in situ growth method. The resultant ZIF 8/Carbon shows excellent adsorption removal efficiency for malachite green (MG) with a maximum adsorption capacity of 3056 mg/g at 30 degC. The adsorption kinetics and isotherm data fit well with the pseudo second order kinetic model and Langmuir isotherm model, respectively. The influences of temperature, solution pH and salts are also investigated. In addition, the adsorbent can be separated easily by filtration because of its large particle size. Moreover, regeneration experiments reveal that the used adsorbent still exhibits excellent applicability after at least four recycling runs. These features enable ZIF 8/Carbon to be a promising adsorbent for the removal of MG from water.
author_names: Yanfang Li

Xinlong Yan

Xiaoyan Hu

Rui Feng

Min Zhou

Dezhi Han
title: In situ growth of ZIF 8 onto porous carbons as an efficient adsorbent for malachite green removal
venue: Journal of Porous Materials
year: 2020