水環境国際招聘賞（いであ招聘賞）（JSWE‑IDEA Water Environment InternationalExchange Award）授賞に関して
本会では，水環境分野の国際交流・国際協力の促進を目的として，いであ株式会社からのご出捐により，水環境国際招聘賞と水環境国際活動賞を設けております。水環境国際招聘賞は本会年会で研究発表を行う海外在住外国人会員に対して，来日費用等の助成を行う制度です。第 51 回年会には中国から 2 名、韓国から 1 名を招聘し，研究発表を行っていただきました。発表を終えて帰国された受賞者に参加報告を書いていただきましたので，ご紹介します。
なお，今年度の水環境国際招聘賞の募集案内は夏頃に本誌会告に掲載する予定です。
（水環境国際活動賞・招聘賞選考委員会）

Control Health Risks in Water Environment Hand in Hand
Associate professor, School of Environment, Tsinghua University（清华大学，副教授）
Beijing, China（中国北京）

Yun Lu（陆韻）It was my great honor to be invited to join the 51st
Annual Conference of Japan Society on Water
Environment in Kumamoto and to receive the JSWEIDEA Water Environment International ExchangeAward. My several friends had strongly recommended
this award before my application, which made me
really excited to ﬁnally get it.
I got my Ph.D. of Biology in Tsinghua University, anddid postdoctoral training in Duke University, USA. I
switched my research direction to environmental
health when I came back to Tsinghua, since I cansolve the environmental problems in a diﬀerent angle,
and I think I did make a correct decision.
In the conference, I presented a new potential risk in
the reclaimed water. When the reclaimed water wasused in urban, like carwash, garden irrigation, street
cleaning, the water will be aerosolized and cause a
direct inhalation exposure to human. We found that
acute inhalation of reclaimed water could cause strong
inﬂammation in lung, which was best presented by thepolymorphonuclear cell proportion in the lavage. To
screen the main risk factors in reclaimed water, weﬁrst demonstrated that large molecules or particles（>10KD）contain all the inﬂammation inducing abilities
through molecular size-fractionation. Then we useddose-response relationship comparison and polymyxin
B aﬃnity chromatography to prove free endotoxin is
the major inﬂammation inducer in the reclaimedwater.
This work is pretty new in reclaimed water ﬁeld.

Vol. 40（A） No. 6（2017）

Some Japanese colleagues showed great interests in
my topic. One of the discussion focused on theenvironmental relevance. Actually, we calculated thethreshold of acute exposure and found that more than
60％ of reclaimed water in the literature had higher
endotoxin levels. The main reason is that water
treatment is guided by the quality standard, which
includes the traditional parameters like COD, BOD, TN,TP, total bacteria, and more, but not endotoxin. This
results in the high possibility to have qualiﬁed
reclaimed water with high levels of endotoxins.
Another point was how to remove the endotoxins inreclaimed water. From the study above, we know thatultraﬁltration can deﬁnitely remove nearly all theendotoxins, but it is relatively expensive. We tested
chlorination and found that chlorine could increase theendotoxin activity but partially remove theinﬂammation inducing ability. One professor gave agood suggestion that ozonation could be a possibleway. We are trying this idea these days.
I should say that JSWE provided us a great
opportunity to talk to the top water scientists in Japan,
and further strengthened the collaboration between
Japan and China in water health area. I am happy tobe the bridge to introduce JSWE to more Chinese
peers, and suggest Chinese Society of Environmental
Science to adopt similar approach to solve crucialwater problems hand in hand by inviting more
Japanese colleagues in the future.

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JSWE-IDEA Water Environment International
Exchange AwardProfessor, Department of Environmental Science & Engineering
Tianjin University of Science & Technology（天津科技大学）

Chang WANG（王昶）

I am pleased to win JSWE-IDEA Water Environment
International Exchange Award. The 51th annual
conference from 15th to 17th March 2017 in beautiful
Kumamoto University gave me a deep impression. The
conference oﬀered me an opportunity to introduce myresearch results on sewage treatment in rural area ofChina over the past decade. Meanwhile, the scientiﬁccommunication with peers was fruitful. I reallyappreciate JSWE and my recommenders Prof. Kaiqin
XU and Prof. Kensuke FUKUSHI. The international
communication not only contributes to global
environmental protection, but also develops thefriendship between Japan and China.
I was ﬁrstly sent to Gunma University as a visiting
scholar by Chinese government in September 1986 forone year study, and then was invited by Prof. Kato to
the engineering department as a visiting research
fellow in September 1991. From April 1992 to March
1995, I studied for a PhD degree in Production
Engineering and served as an assistant professor inengineering department after graduation. Since April
1997, I worked in Taiyo-Kogyo Company and waspromoted to be the factory director. Finally, in order todevelop the friendship between Japan and China, I
returned to graduate school of Sino-Japan attached toTianjin University of Science and Technology
recommended by Prof. Sadakata in the University ofTokyo. Now I engage in the teaching and research ofenvironmental science and training youngsters.
Taking advantage of memorandum of cooperation
between Tianjin municipal government and theUniversity of Tokyo in 2005 that carried out scientiﬁc
research and technological development in various
ﬁelds, I cooperated with Prof. Fukushi in Integrated
Research System for Sustainability Science（IR3S）todevelop suitable purifying tank technique in treating
sewage of rural China. Thus, three demonstration

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projects of purifying tanks were established in Tianjin
rural area since August 2008. The system used aunique bio-ﬁlter and special aerobic microorganisms
with stable operation and good treating results for 9years. In 2009, hydrolysis tank and purifying tanks for
multi-household were developed to set up anormalization model for sewage treatment, in order tosave the cost of investment and operation. Speciﬁcally,
the prepositive hydrolysis tank has the advantage ofpurifying tank where sewage is treated by the aerobiczone, anaerobic zone and bio-ﬁlter. The solid in sewage
is eliminated to let water ﬂow into the sewer andpurifying tank with controllable aeration. In 2014,
several demonstration projects were established totreat sewage from 2 households, 5 households, 15households, an apartment building and one village,respectively. The BOD concentration in eﬄuent is lessthan 20 mg/L. Besides the low cost of investment andoperation, there is few sludge produced, which allows
the management being very convenient. Recently, thetechnique attracts the great attention fromgovernment and seems to be promoted in China as aclassic case.
Due to the long-term stable operation and eﬃcient
treatment of these demonstration projects, thetechnique not only obtained the peersʼ recognition, butalso won the ﬁrst prize of Chinese Ministry ofAgriculture in 2013. These results are symbols of SinoJapanese friendship and cooperation, with high socialand environmental eﬀects. It is a great encouragement
for me to get JSWE-IDEA Water Environment
International Exchange Award at the annual conference.
There is a still need to improve the technique, so I
wish to communicate with Japanese experts, professors
and students in the future to promote thedevelopment of purifying tank and contribute to global
environmental protection.

水環境学会誌

Journal of Japan Society on Water Environment

JSWEʼs annual conference:a unique and valuable experience
Associate Professor,
School of Civil, Architectural Engineering & Landscape Architecture,
SungKyunKwan University（SKKU）, Korea

Am JANG

Before I start, I would like to thank Japan Society on
Water Environment（JSWE）committee for giving me
a wonderful opportunity to attend the 51st Annual
Conference of JSWE, which was held from 15th to 17thof March 2017 in Kumamoto, Japan. Not only it was anhonor to be able to give a presentation on one of ourresearch work at the conference, but also, it is indeed
a great honor to win JSWE-IDEA Water Environment
International Exchange Award.
I have always been interested in attending
international conferences, since I can meet specialists
in diﬀerent research areas, including my own, acrossthe world. The 51st Annual Conference of JSWE,
certainly was one of the most informative, interesting
and active conferences and I could meet andcommunicate with many researchers from Japan,
China and other countries, which I am sure has
provided me with numerous opportunities to broaden
and polish my research area.
At the conference, I gave presentation about a rotary
disc voltammetric （RDV） sensor system for semicontinuous and on-site measurements of Lead（II）（Pb（II））. Pb（II）is one of the main factors contributing tothe conditions of the aquatic ecosystems, by aﬀecting
the water quality. Pb（II）is found to cause neurologicalproblems, and is toxic to many living organisms,
especially to human beings. It is well known that theprimary sources of Pb（II） contamination is theanthropogenic activities, such as mining operation andindustrial processing. Also, many studies havesuggested that the toxic substances from mining
operation may be a contributing factor for the heavy
metal contamination of the local surface water andgroundwater. Therefore, interests in monitoring thewater quality has been increasing, especially for theon-site monitoring, and monitoring the amount of thePb（II） in water would make the controlling of thewater quality more accurate, and easy.
Our research objective was to characterize a new
type of RDV sensor that has been successfullyVol. 40（A） No. 6（2017）

designed and fabricated for the semi-continuous andon-site determination of trace levels of Pb（II）in nondeoxygenating solutions. Square-Wave Anodic
Stripping Voltammetry （SWASV） made a precise
determination of heavy metals, and the RDV sensor
had a correlation coeﬃcient of 0 998 for the Pb（II）
concentration range between 10 nM‒10 µM at
deposition time of 180 seconds. Moreover, the low
detection limit for Pb（II）was 6 19 nM for Pb（II）. Thisadvanced monitoring technique may be more beneﬁcial
for environmental engineers when creating theeﬀective heavy metals treatment systems. The RDV
sensor we developed would provide great opportunity
to resolve problems associated with fouling or clogging,which results from the deposition of iron andmanganese oxides as well as scaling of poorly soluble
salts, for its disposable polymer lab chip. The newly
developed sensor by using the microfabrication andpolymer micromachining techniques, is ready-to-use,
has a high yield, and is cheap, which I believe will
significantly contribute to on-site environmental
monitoring applications.
It was my very ﬁrst time to attend the JSWE annual
conference, and I must admit that I was quite
surprised, and pleased, by the quality of theconference itself. I also had a chance to meet otherprofessors, researchers and experts who are working
to make improvements in environments, especially inwater. Therefore, I believe that it would be anamazing opportunity for young researchers to build
connections and learn from other leading specialists,
and that more young researchers should participate
and attend the JSWE Annual Conference. Once again,
I would like to thank all the JSWE members,
conference committees and fellow researchers fornominating me and choosing me as the recipient ofJSWE-IDEA Water Environment International
Exchange Award, and I am looking forward to attend
JSWEʼs future conferences.

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