title: Species-dependent effects of biochar amendment on bioaccumulation of atrazine in earthworms.
abstract: We observed that at a contamination level of 4.25 mg-atrazine/kg-soil, the biota-soil accumulation factor (BSAF) for the anecic M. guillelmi is approximately 5 times that for the epigeic E. foetida. This is attributable to the fact that bio-uptake by E. foetida is mainly through dermal absorption, whereas bio-uptake by M. guillelmi is largely affected by the gut processes, through which the physical grinding and surfactant-like materials facilitate the desorption of atrazine from soil. Strikingly, biochar amendment resulted in much greater reduction in BSAF for M. guillelmi than for E. foetida. At a biochar dose of 0.5% (wt:wt) the difference in BSAF between the two species became much smaller, and at a dose of 2% no statistical difference was observed. A likely explanation is that gut processes by M. guillelmi were much less effective in extracting atrazine from the biochar (the predominant phase wherein atrazine resided) than from soil particles.
authors.affiliation: College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Ji
authors.affiliation: College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Jiang
authors.affiliation: College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China. Electronic address: chenwei@nankai.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
mesh_terms: D000818:Animals; D001280:Atrazine / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity; D058448:Biota; D002606:Charcoal / Q000737:chemistry*; D006540:Herbicides / Q000737:chemistry / Q000378:metabolism / Q000633:toxicity; D009835:Oligochaeta / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry / Q000378:metabolism* / Q000633:toxicity
chemical_list: D006540:Herbicides; D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal; D001280:Atrazine
keywords: Atrazine; Bioaccumulation; Biochar; Contaminated soil; Earthworm