Most chemical plant wastewater contains both organic and inorganic pollutants, which are easy to diffuse along with surface runoff. The combined pollution of nonylphenol (NP) and cadmium (Cd) in soil is a serious problem that has not attracted enough attention. Based on the effects of selenium (Se) and () on plant and soil microbial communities, we speculated that the application of Se and in soil could improve the phytoremediation efficiency of ryegrass on contaminated soil. In this study, pot experiments with Cd and NP co-contaminated soil were conducted, and the results showed that application of alone could improve the removal rates of NP and Cd by ryegrass, and the supplementary of Se further enhanced the effect of micro-phyto remediation, with the highest removal rates of NP and Cd were 79.6% and 49.4%, respectively. The application of plus Se reduced the adsorption of Cd and NP through C–O and Si–O–Fe of the soil, changed the enzyme activity, and also affected the changing trend of the microbial community in soil. , , , and other beneficial bacteria were enriched after a 60-day period with and Se treatment, thus promoting the removal of NP and Cd. In light of the above results, we suggest that application can efficiently facilitate the phytoremediation of ryegrass on Cd-NP co-contaminated soil, and Se supplementation in soil showed the synergistic effect on the remediation.

中文翻译：

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硒提高铜绿假单胞菌和黑麦草对镉-壬基酚复合污染土壤的联合修复效率

大多数化工厂废水同时含有有机和无机污染物，很容易随着地表径流扩散。土壤中壬基酚（NP）和镉（Cd）的复合污染是一个严重的问题，但尚未引起足够的重视。基于硒（Se）和（）对植物和土壤微生物群落的影响，我们推测在土壤中施用硒和（）可以提高黑麦草对污染土壤的植物修复效率。本研究对Cd和NP共同污染的土壤进行了盆栽试验，结果表明，单独施用可以提高黑麦草对NP和Cd的去除率，补充Se进一步增强了微植物的效果。修复后，NP和Cd的去除率最高分别为79.6%和49.4%。加硒减少了土壤C-O和Si-O-Fe对Cd和NP的吸附，改变了酶活性，也影响了土壤微生物群落的变化趋势。经过60天的Se处理后， 、 、 、 等有益菌得到富集，从而促进了NP和Cd的去除。鉴于上述结果，我们认为施用黑麦草可以有效促进Cd-NP复合污染土壤的植物修复，并且土壤中补硒对修复表现出协同效应。