title: Influence of chemical and structural evolution of dissolved organic matter on electron transfer capacity during composting.
abstract: Dissolved organic matter (DOM) can mediate electron transfer and change chemical speciation of heavy metals. In this study, the electron transfer capability (ETC) of compost-derived DOM was investigated through electrochemical approaches, and the factors influencing the ETC were studied using spectral and elemental analysis. The results showed that the electron accepting capacity (EAC) and electron donating capacity (EDC) of compost-derived DOM were 3.29-40.14μmole- (gC)(-1) and 57.1- 346.07μmole- (gC)(-1), respectively. Composting treatment increased the fulvic- and humic-like substance content, oxygenated aliphatic carbon content, lignin-derived aromatic carbon content, molecule weight, and N and S content of DOM, but decreased the aliphatic carbon content and the C and H content. This conversion increased the EDC and EAC of the DOM during composting.
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
authors: Xiao-Song
authors: XS
authors: He
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China. Electronic address: hexs82@126.com.
authors: Bei-Dou
authors: BD
authors: Xi
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
authors: Dong-Yu
authors: DY
authors: Cui
authors: Guangdong Key Laboratory of Agro-Environmental Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China.
authors: Yong
authors: Y
authors: Liu
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
authors: Wen-Bin
authors: WB
authors: Tan
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
authors: Hong-Wei
authors: HW
authors: Pan
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China.
authors: Dan
authors: D
authors: Li
mesh_terms: D004579:Electron Transport; D006812:Humic Substances / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D012037:Refuse Disposal; D062611:Solid Waste / Q000032:analysis*; D012995:Solubility
chemical_list: D006812:Humic Substances; D019216:Metals, Heavy; D062611:Solid Waste
keywords: Composting; Dissolved organic matter; Electron transfer capability; Heavy metals