Adsorption Characteristics of Anionic Dye by Fe-Decorated Biochar Derived from Fallen Leaves |
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분야 | 수질환경 |
저자목록 |
박종환1, 김홍출2, 김영진3, 서동철4 * |
논문게재정보 | 289p ~ 296p |
초록 | 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. |
논문파일 | |
키워드 | Adsorption, Biochar, Congo red, Fallen leaves, Iron |