堆肥浸出液中溶解性有机氮的组成、去除、氧化还原和金属络合特性。
Composition, removal, redox, and metal complexation properties of dissolved organic nitrogen in composting leachates.
机构信息
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.
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.
出版信息
J Hazard Mater. 2015;283:227-33. doi: 10.1016/j.jhazmat.2014.09.027. Epub 2014 Sep 22.
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.
本研究调查了堆肥浸出液中溶解有机氮（DON）的组成、去除、氧化还原和金属络合特性。结果表明，浸出液来源的 DON 由蛋白质化合物和胺组成，其中大部分整合到富里酸和腐殖酸类物质中。在进水浸出液中检测到中性、碱性、酸性、羟基、芳香族和硫酸氨基酸。然而，它们中的大多数被生物和物理过程去除，只有中性氨基酸在出水时被检测到。DON 不是浸出液溶解性有机物（DOM）氧化还原能力的主要贡献者。然而，它表现出很强的金属络合能力。胺与 Mo、Co、Cr 和 Ni 等金属形成强配合物，而蛋白质物质与 Cr 和 Ni 等金属相互作用。
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