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首页> 外文期刊>International Journal of Phytoremediation >Responses of soil microbial community and enzymes during plant-assisted biodegradation of di-(2-ethylhexyl) phthalate and pyrene
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Responses of soil microbial community and enzymes during plant-assisted biodegradation of di-(2-ethylhexyl) phthalate and pyrene

机译：土壤微生物群落及植物辅助生物降解期间的土壤微生物分解和芘和芘的反应

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A pot experiment was conducted to explore the plant-assisted degradation efficiency of di-(2-ethylhexyl) phthalate (DEHP) and pyrene. Three plant species: Ceylon spinach, sunflower, and leaf mustard were cultivated in co-contaminated soils under three contamination levels: control (T0), 20 mg kg(-1) (T20), and 50 mg kg(-1) (T50). The results showed that a higher DEHP and pyrene degradation efficiency was observed evidently in planted cases, increasing from 42 to 53-59% (T0), 61 to 65-76% (T20) and 52 to 68-78% (T50) for DEHP, and from 22 to 30-49% (T0), 58 to 62-72% (T20), and 54 to 57-70% (T50) for pyrene. Under T20 contamination level, soil phospholipid fatty-acid analysis depicted the increased microbial biomass in rhizosphere, especially the arbuscular mycorrhizal fungus that is effective for the degradation of organic pollutants. The study also revealed that the activities of dehydrogenase, acid phosphomonoesterase, urease, and phenol oxidase negatively correlated with pollutant concentration. In general, the removal rate of DEHP and pyrene was highest in the soil planted with leaf mustard for each contamination level considered. For soils at T20 level, sunflower and leaf mustard appeared as interesting phytoremediation plants due to the improved removal rates of organic pollutants and the soil microbial activity.
机译：进行罐实验以探讨邻苯二甲酸酯（2-乙基己基）和芘的植物辅助降解效率。三种植物物种：锡朗菠菜，向日葵和叶芥末在三种污染水平下的共污染土壤中培养：对照（T0），20mg kg（-1）（T20）和50mg kg（-1）（t50 ）。结果表明，在种植的情况下显然观察到更高的DEHP和芘降解效率，从42〜53-59％（T0），61-65-76％（T20）和52％至68-78％（T50）增加到DeHP，22至30-49％（T0），58至62-72％（T20），芘为54至57-70％（T50）。在T20污染水平下，土壤磷脂脂肪酸分析描绘了根际的微生物生物量增加，特别是对有机污染物的降解有效的丛枝菌根菌。该研究还表明，脱氢酶，酸磷酸酯酶，脲酶和苯酚氧化酶的活性与污染物浓度负相关。一般而言，在叶片芥末的土壤中，DeHP和芘的去除率最高，用于考虑的每个污染水平。对于T20水平的土壤，由于有机污染物和土壤微生物活性的改善，向日葵和叶芥末呈现出有趣的植物修复植物。

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