Effects of pyrolysis temperature on soybean stover- and peanut shell-derived biochar properties and TCE adsorption in water.
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.
Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of Korea.
Mahtab
M
Ahmad
Sang Soo
SS
Lee
Xiaomin
X
Dou
Dinesh
D
Mohan
Jwa-Kyung
JK
Sung
Jae E
JE
Yang
Yong Sik
YS
Ok
D000327:Adsorption; D010367:Arachis / Q000737:chemistry*; D001673:Biodegradation, Environmental; D002606:Charcoal / Q000737:chemistry*; D004602:Elements; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D013025:Glycine max / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D014241:Trichloroethylene / Q000302:isolation & purification*; D014866:Waste Products; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D004602:Elements; D014866:Waste Products; D014874:Water Pollutants, Chemical; C540010:biochar; D014867:Water; D002606:Charcoal; D014241:Trichloroethylene