在堆肥过程中，溶解有机质的化学和结构演化对电子传递能力的影响。
Influence of chemical and structural evolution of dissolved organic matter on electron transfer capacity during composting.
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. 2014 Mar 15;268:256-63. doi: 10.1016/j.jhazmat.2014.01.030. Epub 2014 Jan 26.
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.
溶解有机质 (DOM) 可以介导电子转移并改变重金属的化学形态。在本研究中，通过电化学方法研究了堆肥衍生 DOM 的电子转移能力 (ETC)，并通过光谱和元素分析研究了影响 ETC 的因素。结果表明，堆肥衍生 DOM 的电子接受能力 (EAC) 和电子供体能力 (EDC) 分别为 3.29-40.14μmole- (gC)(-1) 和 57.1-346.07μmole- (gC)(-1)。堆肥处理增加了 DOM 中富里酸和腐殖酸物质的含量、含氧脂肪碳含量、木质素衍生芳香碳含量、分子量以及氮和硫的含量，但降低了脂肪碳含量以及碳和氢的含量。这种转化增加了堆肥过程中 DOM 的 EDC 和 EAC。
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