- Cu and Cd Sorption of the Biochar Derived from Coffee Sludge
- Kim, Byung-Moon;Kang, Chang-Hwan;Yang, Jae-Kyu;Na, Jung-Kyun;Jung, Jong-Am;Jung, Hyung-Jin;Lim, Jin-Hwan;Ko, Kyung-Min;Kim, Wan-Hee;Chang, Yoon-Young;
- Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Division of General Education, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;Dept. of Environmental Engineering, Kwangwoon University;
- 커피 슬러지 바이오차의 Cu와 Cd 흡착제거 특성 연구
- 김병문;강창환;양재규;나정균;정종암;정형진;임진환;고경민;김완희;장윤영;
- 광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 교양학부;광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 환경공학과;광운대학교 환경공학과;
Abstract
In this study, the adsorption of $Cu^{2+}$ and $Cd^{2+}$ from aqueous solution on the biochar derived from used coffee grounds at different pyrolysis temperatures has been investigated as a potential low-cost treatment method for heavy metal-containing waters. Three biochar samples prepared by heating coffee sludge at temperature of $300^{\circ}C$ (B300), $500^{\circ}C$ (B500), and $700^{\circ}C$ (B700) were tested for the adsorption capacity and kinetics of Cd and Cu. Also the influencing factor of heavy metal removal by ion exchange in terms of cation exchange capacity (CEC) of each biochar was measured. Adsorption of Ca and Cu by biochar produced at higher pyrolysis temperature showed higher adsorption capacity but the optimal pyrolysis temperature based on performance and economy was known as $500^{\circ}C$ . Sorption of Cu and Cd by biochar followed a Langmuir model at pH 6~6.5, attributing mainly to surface sorption. The biochar was more effective in Cu and Cd sorption than activated carbon (AC), with BC 500 being the most effective, which indicates that sorption of Cd and Cu by coffee sludge biochar is partly influenced by chemical sorption on surface functional group as well as physical sorption.
Keywords: Pyrolysis;Biochar;Sorbent;Metal;Coffee sludge;
This Article