title: Effect of aging process on adsorption of diethyl phthalate in soils amended with bamboo biochar.
abstract: Biochar is a carbonaceous sorbent and can be used as a potential material to reduce the bioavailability of organic pollutants in contaminated soils. In the present study, the adsorption and desorption of diethyl phthalate (DEP) onto soils amended with bamboo biochar was investigated with a special focus on the effect of biochar application rates and aging conditions on the adsorption capacity of the soils. Biochar amendment significantly enhanced the soil adsorption of DEP that increased with increasing application rates of biochar. However, the adsorption capacity decreased by two aging processes (alternating wet and dry, and constantly moist). In the soil with low organic carbon (OC) content, the addition of 0.5% biochar (without aging) increased the adsorption by nearly 98 times compared to the control, and exhibited the highest adsorption capacity among all the treatments. In the soil with high OC content, the adsorption capacity in the treatment of 0.5% biochar without aging was 3.5 and 3 times greater than those of the treatments of biochar aged by alternating wet and dry, and constantly moist, respectively. Moreover, constantly moist resulted in a greater adsorption capacity than alternating wet and dry treatments regardless of biochar addition. This study revealed that biochar application enhanced soil sorption of DEP, however, the enhancement of the adsorption capacity was dependent on the soil organic carbon levels, and aging processes of biochar.
authors.affiliation: Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China; School of Environmental and Resource Sciences, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China.
authors.forename: Xiaokai
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Civil and Environmental Engineering, Faculty of Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
authors.forename: Ajit K
authors.initials: AK
authors.lastname: Sarmah
authors.affiliation: Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, South Australia 5095, Australia.
authors.forename: Nanthi S
authors.initials: NS
authors.lastname: Bolan
authors.affiliation: Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China; School of Environmental and Resource Sciences, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China. Electronic address: helizhiyongyuan@163.com.
authors.forename: Lizhi
authors.initials: L
authors.lastname: He
authors.affiliation: Guangdong Dazhong Agriculture Science Co. Ltd., Hongmei Town, Dongguan, Guangdong 523169, China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Lin
authors.affiliation: School of Engineering, Huzhou University, Huzhou, Zhejiang 313000, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Che
authors.affiliation: Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China; Centre for AgriBioscience, La Trobe University, Kingsbury Drive, Melbourne, Victoria 3086, Australia.
authors.forename: Caixian
authors.initials: C
authors.lastname: Tang
authors.affiliation: Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Lin'an, Hangzhou, Zhejiang 311300, China; Guangdong Dazhong Agriculture Science Co. Ltd., Hongmei Town, Dongguan, Guangdong 523169, China. Electronic address: hailong@zafu.edu.cn.
authors.forename: Hailong
authors.initials: H
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D006801:Humans; D010795:Phthalic Acids / Q000737:chemistry* / Q000302:isolation & purification; D006109:Poaceae / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry* / Q000302:isolation & purification; D013997:Time Factors
chemical_list: D010795:Phthalic Acids; D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal; C007379:diethyl phthalate
keywords: Adsorption; Aged biochar; Desorption; Diethyl phthalate; Soil contamination