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J Korean Soc Environ Eng > Volume 38(9); 2016 > Article
J Korean Soc Environ Eng 2016;38(9): 521-527. doi: https://doi.org/10.4491/KSEE.2016.38.9.521
영가철이 고정된 입상활성탄 제조를 위한 최적 합성조건 도출
황유훈1, Paul D. Mines2, 이원태3, Henrik R. Andersen2
1서울과학기술대학교 환경공학과
2덴마크공과대학 환경공학과
3금오공과대학교 환경공학과
Optimization of Synthesis Condition for Nanoscale Zero Valent Iron Immobilization on Granular Activated Carbon
Yuhoon Hwang1, Paul D. Mines2, Wontae Lee3, Henrik R. Andersen2
1Department of Environmental Engineering, Seoul National University of Science and Technology
2Department of Environmental Engineering, Technical University of Denmark
3School of Civil and Environmental Engineering, Kumoh National Institute of Technology
Corresponding author  Yuhoon Hwang ,Tel: 02-970-6626, Fax: 02-971-5576, Email: yhhwang@seoultech.ac.kr
Received: August 19, 2016;  Revised: September 5, 2016;  Accepted: September 13, 2016.  Published online: September 30, 2016.
ABSTRACT
Nanoscale zero valent iron (nZVI) has been intensively studied for the treatment of a plethora of pollutants through reductive reaction, however, the nano size should be of concern when nZVI is considered for water treatment, due to difficulties in recovery. The loss of nZVI causes not only economical loss, but also potential risk to human health and environment. Thus, the immobilization onto coarse or structured support is essential. In this study, two representative processes for nZVI immobilization on granular activated carbon (GAC) were evaluated, and optimized conditions for synthesizing Fe/GAC composite were suggested. Both total iron content and Fe0 content can be significantly affected by preparation processes, therefore, it was important to avoid oxidation during preparation to achieve higher reduction capacity. Synthesis conditions such as reduction time and existence of intermediate drying step were investigated to improve Fe0 content of Fe/GAC composites. The optimal condition was two hours of NaBH4 reduction without intermediate drying process. The prepared Fe/GAC composite showed synergistic effect of the adsorption capability of the GAC and the degradation capability of the nZVI, which make this composite a very effective material for environmental remediation.
Key Words: Granular Activated Carbon, Nanoscale Zero Valent Iron, Oxidation-Reduction, Impregnation
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