• Physicochemical Properties and Cu Sorption of the Biochar Derived from Woody Biomass
  • Park, Yi-Kyung;Yang, Jae-Kyu;Na, Jung-Kyun;Jung, Jong-Am;Jung, Hyung-Jin;Kang, Chang-Hwan;Ko, Kyung-Min;Kim, Wan-Hee;Chang, Yoon-Young;
  • 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;
  • 목질계 바이오매스에서 생산된 바이오차의 물리화학적 특성 및 Cu 흡착제거 특성
  • 박이경;양재규;나정균;정종암;정형진;강창환;고경민;김완희;장윤영;
  • 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 $Cu^{2+}$ from aqueous solution by the biochar derived from woody biomass at different pyrolysis temperatures has been investigated. The woody biomass wastes used in this study were branch of willow ($Salix$ $koreensis$ $Andersson$) and bark of chestnut ($Castanea$ $crenata$ $var.$ $dulcis$). Three biochar samples prepared by heating each biomass at temperature of $300^{\circ}C$, $500^{\circ}C$, and $700^{\circ}C$were tested for the adsorption capacity of Cu. Also the physicochemical properties of the developed biochars were studied using different characterization techniques such as FT-IR, SEM, BET surface area, and cation exchange capacity (CEC). The adsorption of Cu could be well described by Langmuir model for both willow and chestnut biochars with $R^2{\geq}0.98$. The maximum adsorption capacities of the biochar produced at $700^{\circ}C$ from the Langmuir equation were found to be 12.5 mg $g^{-1}$ and 16.9 mg $g^{-1}$ for willow and chestnut, respectively. Chestnut biochar was found to interact more effectively with the active sites available for Cu, resulting higher removal of Cu(II) than wiloow biochar. Ion exchange and surface complexation found to be the main mechanisms involved in the adsorption process. This study demonstrated the feasibility of the biochars derived from woody biomass to be as a low-cost potential adsorbent for heavy metals as Cu(II) removal in aquatic system.

Keywords: Pyrolysis;Biochar;Sorbent;Cu;Woody biomass;

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