Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Adsorption Characteristics of Anionic Dye by Fe-Decorated Biochar Derived from Fallen Leaves

철 함침 낙엽 Biochar에 의한 음이온성 염료의 흡착특성

  • Park, Jong-Hwan (Department of Agricultural Chemistry and Food Science & Technology (Institute of Agriculture and Life Science), College of Agriculture and Life Science, Gyeongsang National University) ;
  • Kim, Hong-Chul (Department of Pharmaceutical Engineering, College of Life Science, Gyeongnam National University of Science and Technology) ;
  • Kim, Yeong-Jin (Environmental Toxicology Research Center, Korea Institute of Toxicology) ;
  • Seo, Dong-Cheol (Department of Agricultural Chemistry and Food Science & Technology (Institute of Agriculture and Life Science), College of Agriculture and Life Science, Gyeongsang National University)
  • 박종환 (경상대학교 농업생명과학대학 농화학식품공학과(농업생명과학연구원)) ;
  • 김홍출 (경남과학기술대학교 생명과학대학 제약공학과) ;
  • 김영진 (안전성평가연구소 환경독성연구센터) ;
  • 서동철 (경상대학교 농업생명과학대학 농화학식품공학과(농업생명과학연구원))
  • Received : 2020.09.08
  • Accepted : 2020.09.24
  • Published : 2020.12.31
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Abstract

BACKGROUND: There is a need for a revolutionary method to overcome the problem of biochar, which has relatively low adsorption capacity for existing anion pollutants, along with collectively recycling fallen leaves, a kind of forest by-product. Therefore, the objective of this study was to prepare iron-decorated biochar derived from fallen leaves (Fe-FLB), and to evaluate their adsorption properties to Congo red (CR) as anionic dye. METHODS AND RESULTS: The adsorption properties of CR by fallen leaves biochar (FLB) and Fe-FLB were performed under various conditions such as initial CR concentration, reaction time, pH and dosage with isotherm and kinetic models. In this study, Fe-FLB prepared through iron impregnation and pyrolysis of fallen leaves contained 56.9% carbon and 6.3% iron. Congo red adsorption by FLB and Fe-FLB was well described by Langmuir model and pseudo second order model and the maximum adsorption capacities of FLB and Fe-FLB were 1.1 mg/g and 25.6 mg/g, respectively. In particular, it was found that the adsorption of CR was occurred by chemical adsorption process by the outer boundary layer of Fe-FLB. CONCLUSION: Overall, the production of Fe-FLB using fallen leaves and using it as an anion adsorbent is considered to be a way to overcome the problem of biochar with relatively low anion adsorption in addition to the reduction effect of waste.

Keywords

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