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강원대학교, 현 고려대학교

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Bioresour. Technol., Volume 118, August 2012, Pages 536-544 | https://doi.org/10.1016/j.biortech.2012.05.042 Effects of pyrolysis temperature on soybean stover- and peanut shell-derived biochar properties and TCE adsorption in water

Mahtab Ahmad^a, Sang Soo Lee^a, Xiaomin Dou^b, Dinesh Mohan^c, Jwa-Kyung Sung^d, Jae E Yang^a, Yong Sik Ok^a,*^a Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of Korea

^bDepartment of Environmental Science and Engineering, Beijing Forestry University, P.O. Box 60, Beijing 100083, PR China

^c School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India

^dNational Academy of Agricultural Science, RDA, Suwon 441-707, Republic of Korea

^*Corresponding author.

Abstract

Conversion of crop residues into biochars (BCs) via pyrolysis is beneficial to environment compared to their direct combustion in agricultural field. Biochars developed from soybean stover at 300 and 700 °C (S-BC300 and S-BC700, respectively) and peanut shells at 300 and 700 °C (P-BC300 and P-BC700, respectively) were used for the removal of trichloroethylene (TCE) from water. Batch adsorption experiments showed that the TCE adsorption was strongly dependent on the BCs properties. Linear relationships were obtained between sorption parameters (K_M and S_M) and molar elemental ratios as well as surface area of the BCs. The high adsorption capacity of BCs produced at 700 °C was attributed to their high aromaticity and low polarity. The efficacy of S-BC700 and P-BC700 for removing TCE from water was comparable to that of activated carbon (AC). Pyrolysis temperature influencing the BC properties was a critical factor to assess the removal efficiency of TCE from water.

Keywords : Crop residue, Biomass, Carbonization, Proximate analysis, Agricultural waste

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