Evolution of humic substances and the forms of heavy metals during co-composting of rice straw and sediment with the aid of Fenton-like process.
Evolution of humic substances and the forms of heavy metals during co-composting of rice straw and sediment with the aid of Fenton-like process.
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DOI：
10.1016/j.biortech.2021.125170
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发表时间：
2021-04
影响因子：
11.4
通讯作者：
Yanrong Chen;Yaoning Chen;Yuanping Li;Yihuan Liu;Hui Li;Hongjuan Jiang;Xin-Wen Luo;P. Tang;Li Chen;Haoqin Yan
中科院分区：
文献类型：
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作者：
Yanrong Chen;Yaoning Chen;Yuanping Li;Yihuan Liu;Hui Li;Hongjuan Jiang;Xin-Wen Luo;P. Tang;Li Chen;Haoqin Yan
采用Fe 3 O 4纳米材料与黄孢原毛平革菌或草酸根构建类Fenton反应体系，并将其应用于稻草与底泥的混合堆肥中，研究其对腐殖物质形成及Cd、Cu、Pb生物有效性的影响。结果表明，类Fenton法对Cd和Cu的钝化效果显著，而对Pb的钝化效果不明显。添加Fe_3O_4纳米颗粒和草酸盐的B堆对交换态Cd（EXC-Cd）和腐殖酸（HA）含量的降低幅度最大，分别为22.35%和20.3 g/kg。RDA分析表明，类Fenton过程增强了腐殖质对Cd、Cu、Pb生物有效性的影响。激发-发射矩阵（EEM）荧光光谱分析表明，类芬顿过程能明显促进腐殖物质的生成。该研究为堆肥修复重金属污染提供了新的视角和途径。
The Fenton-like process was established by Fe3O4nanomaterials (NMs) andPhanerochaete chrysosporiumor oxalate, and applied to the co-composting of rice straw and sediment to study its effect on the formation of humic substance and the bioavailability of Cd, Cu, and Pb. Results shown that the application of Fenton-like process significantly promoted the passivation of Cd and Cu, while not shown obvious enhancement for Pb. The decrease of exchangeable fraction Cd (EXC-Cd) and the humic acid (HA) content in pile B with Fe3O4NMs and oxalate were highest, which were 22.35% and 20.3 g/kg, respectively. Redundancy analyses (RDA) manifested that the Fenton-like process enhanced the influence of humus substance on the bioavailability of Cd, Cu, and Pb. Excitation-emission matrix (EEM) fluorescence spectra analysis suggested that Fenton-like process could obviously enhance the generation of humic substance. This research provides a new perspective and way for composting to remediate heavy metals pollution.