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J Korean Soc Environ Eng > Volume 36(11); 2014 > Article
J Korean Soc Environ Eng 2014;36(11): 771-780. doi: https://doi.org/10.4491/KSEE.2014.36.11.771
다양한 유기계 지지체와 광촉매 Nano-ZnO 복합체를 활용한 1,1,2-trichloroethylene 제거 효율 평가
장대규1, 안호상2, 김정연2, 안창혁2, 이새로미2, 김종규3, 주진철4
1과학기술연합대학원대학교 건설・환경공학과
2한국건설기술연구원 환경연구실
3런던대학교 토목, 환경, 지반공학과
4한밭대학교 건설환경공학과
Evaluation of 1,1,2-trichloroethylene Removal Efficiency Using Composites of Nano-ZnO Photocatalyst and Various Organic Supports
Dae Gyu Jang1, Hosang Ahn2, Jeong Yeon Kim2, Chang Hyuk Ahn2, Saeromi Lee2, Jong Kyu Kim3, Jin Chul Joo4
1Department of Construction&Environment Engineering, Korea University of Science Technology
2Korea Institute of Construction Technology, Environmental Research Division
3Department of Civil, Environmental, and Geomatic Engineering, University College London
4Department of Civil and Environmental Engineering, Hanbat National University
Corresponding author  Jin Chul Joo ,Tel: 042-821-1264, Fax: 042-821-1476, Email: jincjoo@hanbat.ac.kr
Received: August 11, 2014;  Revised: October 20, 2014;  Accepted: November 19, 2014.  Published online: November 30, 2014.
ABSTRACT
In this study, the various organic supports (i.e., silicone, acrylonitrile- butadiene-styrene, epoxy, and, butadiene rubber) with great sorption capacity of organic contaminants were chosen to develop nano-ZnO/organic composites (NZOCs) and to prevent the detachment of nano-ZnO particles. The water resistance of the developed NZOCs were evaluated, and the feasibility of the developed NZOCs were investigated by evaluating the removal efficiency of 1,1,2-trichloroethylene (TCE) in the aqueous phase. Based on the results from water-resistance experiments, long-term water treatment usage of all NZOCs was found to be feasible. According to the FE-SEM, EDX, and imaging analysis, nano-ZnO/butadiene rubber composite (NZBC) with various sizes and types of porosity and crack was measured to be coated with relatively homogeneously-distributed nano-ZnO particles whereas nano- ZnO/silicone composite (NZSC), nano-ZnO/ABS composite (NZAC), and nano-ZnO/epoxy composite (NZEC) with poorly-developed porosity and crack were measured to be coated with relatively heterogeneously-distributed nano-ZnO particles. The sorption capacity of NZBC was close to 60% relative to the initial concentration, and this result was mainly attributed to the amorphous structure of NZBC, hence the hydrophobic partitioning of TCE to the amorphous structure of NZBC intensively occurred. The removal efficiency of TCE in aqueous phase using NZBC was close to 99% relative to the initial concentration, and the removal efficiency of TCE was improved as the amount of NZBC increased. These results stemmed from the synergistic mechanisms with great sorption capability of butadiene rubber and superior photocatalytic activities of nano-ZnO. Finally, the removal efficiency of TCE in aqueous phase using NZBC was well represented by linear model (R2≥0.936), and the Kapp values of NZBC were from 2.64 to 3.85 times greater than those of Kphotolysis, indicating that butadiene rubber was found to be the suitable organic supporting materials with enhanced sorption capacity and without inhibition of photocatalytic activities of nano-ZnO.
Key Words: Butadiene Rubber, Nano-ZnO, Nano-ZnO/organic Composites, Organic Supports, Photocatalytic Activity, Sorption
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