title: Composition, removal, redox, and metal complexation properties of dissolved organic nitrogen in composting leachates.
abstract: This study investigated the composition, removal, redox, and metal complexation characteristics of dissolved organic nitrogen (DON) in composting leachates. Results showed that the leachate-derived DON comprised proteinaceous compounds and amines, and most of them were integrated into the fulvic- and humic-like substances. Neutral, basic, acidic, hydroxylic, aromatic, and sulfuric amino acids all were detected in the influent leachates. However, most of them were removed by the biological and physical processes, and only neutral amino acids were detected in the effluent. The DON was not the main contributor to the redox capability of the leachate dissolved organic matter (DOM). However, it exhibited a strong capability for metal complexation. The amines formed strong complexes with the metals Mo, Co, Cr, and Ni, while the proteinaceous matter interacted with the metals Cr and Ni.
authors.affiliation: 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.forename: Xiao-Song
authors.initials: XS
authors.lastname: He
authors.affiliation: 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: xibeidou@126.com.
authors.forename: Bei-Dou
authors.initials: BD
authors.lastname: Xi
authors.affiliation: Life Science Research Centre, Taishan Medical University, Taian, Shandong, China. Electronic address: zongyongzhanghust@gmail.com.
authors.forename: Zong-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.affiliation: 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.forename: Ru-Tai
authors.initials: RT
authors.lastname: Gao
authors.affiliation: 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.forename: Wen-Bing
authors.initials: WB
authors.lastname: Tan
authors.affiliation: 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.forename: Dong-Yu
authors.initials: DY
authors.lastname: Cui
authors.affiliation: 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.forename: Ying
authors.initials: Y
authors.lastname: Yuan
mesh_terms: D056831:Coordination Complexes / Q000032:analysis*; D004784:Environmental Monitoring; D006812:Humic Substances / Q000032:analysis; D009584:Nitrogen / Q000032:analysis*; D010084:Oxidation-Reduction; D012037:Refuse Disposal; D012987:Soil / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D056831:Coordination Complexes; D006812:Humic Substances; D012987:Soil; D014874:Water Pollutants, Chemical; D009584:Nitrogen
keywords: Complexation; Composting leachates; Dissolved organic nitrogen; Electron transfer capacity; Heavy metals