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首页> 外文期刊>Environmental Science and Pollution Research >Study on the efficiency of phytoremediation of soils heavily polluted with PAHs in petroleum-contaminated sites by microorganism
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Study on the efficiency of phytoremediation of soils heavily polluted with PAHs in petroleum-contaminated sites by microorganism

机译：微生物对石油污染部位植物植物植物植物植物修复效率研究

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摘要

The effects of Fire Phoenix (a mixture of Festuca L.) and Purple coneflower (Echinacea purpurea (L.) Moench) on the remediation of two different high concentrations of PAH-contaminated soils were studied under the effect of strain N12 (Mycobacterium sp.), and the changes in rhizosphere enzymatic activity were preliminarily studied. The results of three culture stages (60 d, 120 d, and 150 d) showed that N12 has a promotional effect on the biomass of Fire Phoenix and E. purpurea, and the effect of N12 on the biomass of Fire Phoenix is better. Under the strengthening of N12, the maximum removal rates of Fire Phoenix reached 86.77% and 67.82% at two high PAH concentrations (A and B, respectively). The activity of dehydrogenase (DHO) is positively correlated with the degradation rate of PAHs at the A concentration (P<0.05). The activity of DHO in soil will continue to increase at a higher level of the B concentration, but the positive correlation between the activity of DHO and the degradation rate of PAH is weakened. In the rhizosphere soil of the two plants, the change in polyphenol oxidase (PPO) activity with time has a significant negative correlation with the degradation rate of PAHs (P<0.05). The experiment proved that Fire Phoenix is more suitable for the remediation of heavy PAH-contaminated soil under the condition of microorganism-strengthening, and it can achieve a better degradation effect when the concentrations of PAHs are <150 mg center dot kg(-1). Results provide a further scientific basis for the remediation of contaminated sites.
机译：在菌株N12（菌丝SP的作用下，研究了火藻（Festuca L.）和紫色Coneflower（紫外线紫癜（L.）Moench）对两种不同高浓度的PAH污染土壤进行修复的影响），初步研究了根际酶活性的变化。三个培养阶段（60d，120d和150d）的结果表明，N12对火藻和E. purpurea的生物质具有促进作用，N12对火凤凰的生物质的影响更好。在加强N12，在两个高PAH浓度（A和B）下，火藻的最大去除率达到86.77％和67.82％。脱氢酶（DHO）的活性与浓度的PAHS的降解速率正相关（P <0.05）。土壤中DHO的活性在B浓度的较高水平下继续增加，但DHO活性与PAH的降解率之间的正相关性削弱。在两种植物的根际土壤中，多酚氧化酶（PPO）活性随时间的变化与PAHs的降解速率显着的负相关（P <0.05）。实验证明，在微生物强化条件下，火藻更适合重蛋白污染土壤的修复，并且当PAHS浓度<150mg中心点kg（-1）时，它可以实现更好的降解效果。结果为修复污染点提供了进一步的科学依据。

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