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Remediation of polycyclic aromatic hydrocarbons in aged agricultural soil using spent Pleurotus eryngii mushroom substrate

文献类型： 外文期刊

作者： Ge, Wei 1 ; Zhou, Huan 2 ; Li, Yan 3 ; Wang, Yanqin 3 ; Zhou, Zhenfeng 2 ; Wu, Juan 2 ; Chai, Chao 2 ;

作者机构： 1.Qingdao Agr Univ, Sch Life Sci, Shandong Prov Key Lab Appl Mycol, Qingdao 266109, Peoples R China

2.Qingdao Agr Univ, Qingdao Engn Res Ctr Rural Environm, Sch Resources & Environm, Qingdao 266109, Peoples R China

3.Shandong Acad Agr Sci, Inst Agr Resource & Environm, Jinan 250100, Peoples R China

关键词： Polycyclic aromatic hydrocarbons; Remediation; Soil; Spent mushroom substrate

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.536； 五年影响因子：3.821 ）

ISSN： 1439-0108

年卷期：

页码：

收录情况： SCI

摘要： Purpose Agricultural soils are faced with increasingly prevalent polycyclic aromatic hydrocarbons (PAHs) pollution. To remediate the PAH-contaminated agricultural soils, the degradation of PAHs in aged contaminated soils by spent mushroom substrate (SMS) of Pleurotus eryngii at different rates and frequencies was analyzed. Materials and methods P. eryngii SMS was applied in the soils at different rates (10%, 20%, 30%, 40%) and frequencies (1, 2, 4), and the soils were incubated for 60 days. The soil physicochemical properties, soil enzymatic activities, biomass of the degrading bacteria, and degradation efficiency of PAHs were analyzed. The degradation products of phenanthrene and fluoranthene were studied. Results and discussion The degradation efficiency of 16 PAHs in soils increased with the increase in the rate and frequency of the SMS application. The highest efficiency was 48.3% when SMS was applied at a rate of 20% and a frequency of 4. The content of soil organic matter, available potassium, and alkaline nitrogen was high when 20% SMS was applied at a high frequency. The biomass of PAH-degrading bacteria and enzyme activities in soils increased when SMS was applied. The degradation efficiency of PAHs was positively correlated with the biomass of PAH-degrading bacteria and activities of most soil enzymes (r = 0.815-0.915, p < 0.05). Conclusions Applying SMS at a high rate and frequency enhanced the degradation of PAHs in soils. The PAHs were cleaved and the ring was opened due to the P. eryngii SMS.

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