Impacts of soil improvement on the pollutant-removal performance and DOM characteristics using a simulation experiment
Impacts of soil improvement on the pollutant-removal performance and DOM characteristics using a simulation experiment
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DOI：
10.1016/j.ecolind.2018.05.057
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发表时间：
2019-10
影响因子：
6.9
通讯作者：
Dong-hai Yuan;Qiang Zhou;Yechen An;Xu-jing Guo;Bin Chen;Saige Wang;Sisi Wang;Yingying Kou;Junqi Li
中科院分区：
文献类型：
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作者：
Dong-hai Yuan;Qiang Zhou;Yechen An;Xu-jing Guo;Bin Chen;Saige Wang;Sisi Wang;Yingying Kou;Junqi Li
采用室内模拟试验装置，研究了玉米秸秆和沸石（CSZ）、草皮和石英砂（CTS）两种不同改良剂对土壤水质的净化效果。结果表明，CSZ对总悬浮物（TSS）、化学需氧量（COD）、总氮（TN）和总磷（TP）的去除率分别为75.58%、25.71%、68.37%和64.67%，CTS分别为85.09%、92.75%、76.71%和98.33%。这表明CTS调理剂的土壤改良表现出比CSZ调理剂更高的水净化性能。利用紫外-可见光谱和荧光光谱对溶解性有机物的结构、组成和来源进行了研究。光谱参数表明，CTS改良土壤的DOM具有较高的腐殖化度和芳香度，微生物源有机质的贡献率较高。此外，2D-COS结果表明，结合位点和序列可以显着影响土壤改良，并在两种类型的调理剂之间的变化。CTS改良土壤比CSW改良土壤更有效地减少荧光DOM。该研究可为农业非点源污染的治理提供科学依据。
An experimental simulation device was used to evaluate the water purification performance of soil improved with two different conditioners, which were cornstalk and zeolite (CSZ), turf and quartz sand (CTS) in this study. The results showed that the removal rates for total suspended solids (TSS), chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) reached 75.58%, 25.71%, 68.37%, and 64.67%, respectively, for CSZ, and 85.09%, 92.75%, 76.71%, and 98.33%, respectively, for CTS, suggesting that soil improvement showed higher water purification performance with the CTS conditioner than with the CSZ conditioner. The structure, composition, and source of dissolved organic matter (DOM) were probed using ultraviolet visible (UV–Vis) spectra and fluorescence spectra. The spectral parameters indicated that the CTS conditioner-improved soil showed a relatively high humification and aromaticity of DOM, and a relatively higher contribution of organic matter derived from microbial substances. In addition, the results of 2D-COS suggested that the binding sites and sequences can be significantly influenced by soil improvement, and vary between the two kinds of conditioners. The CTS-improved soil was more effective in reducing fluorescent DOM than was the CSW-improved soil. This study can provide a scientific foundation for the treatment of agricultural non-point source (NPS) pollution.