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.
Bibliographical noteFunding Information:
This study was supported by the Ministry of Environment, Republic of Korea as “The GAIA Project (No. 173-092-010 )” and the National Research Foundation of Korea Grant funded by the Korean Government (Project No. 2009-0071439 ). Instrumental analysis was supported by the Korea Basic Science Institute, the Environmental Research Institute and the Central Laboratory of Kangwon National University, Korea.
- Agricultural waste
- Crop residue
- Proximate analysis
ASJC Scopus subject areas
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal