文献类型：期刊文献

英文题名：The Combination of Buchloe dactyloides Engelm and Biochar Promotes the Remediation of Soil Contaminated with Polycyclic Aromatic Hydrocarbons

作者：Wang, Yuancheng[1] Li, Ao[1] Zou, Bokun[2] Qian, Yongqiang[2] Li, Xiaoxia[2] Sun, Zhenyuan[1]

第一作者：Wang, Yuancheng

通信作者：Sun, ZY[1];Li, XX[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Inst Ecol Conservat & Restorat, Beijing 100091, Peoples R China

年份：2024

卷号：12

期号：5

外文期刊名：MICROORGANISMS

收录：;Scopus(收录号：2-s2.0-85194082724);WOS:【SCI-EXPANDED(收录号:WOS:001231340200001)】；

基金：We would like to thank all colleagues and friends who have contributed to this study.

语种：英文

外文关键词：Polycyclic aromatic hydrocarbons; Buchloe dactyloides; biochar; phytoremediation; microorganism

摘要：Polycyclic aromatic hydrocarbons (PAHs) cause serious stress to biological health and the soil environment as persistent pollutants. Despite the wide use of biochar in promoting soil improvement, the mechanism of biochar removing soil PAHs through rhizosphere effect in the process of phytoremediation remain uncertain. In this study, the regulation of soil niche and microbial degradation strategies under plants and biochar were explored by analyzing the effects of plants and biochar on microbial community composition, soil metabolism and enzyme activity in the process of PAH degradation. The combination of plants and biochar significantly increased the removal of phenanthrene (6.10%), pyrene (11.50%), benzo[a]pyrene (106.02%) and PAHs (27.10%) when compared with natural attenuation, and significantly increased the removal of benzo[a]pyrene (34.51%) and PAHs (5.96%) when compared with phytoremediation. Compared with phytoremediation, the combination of plants and biochar significantly increased soil nutrient availability, enhanced soil enzyme activity (urease and catalase), improved soil microbial carbon metabolism and amino acid metabolism, thereby benefiting microbial resistance to PAH stress. In addition, the activity of soil enzymes (dehydrogenase, polyphenol oxidase and laccase) and the expression of genes involved in the degradation and microorganisms (streptomyces, curvularia, mortierella and acremonium) were up-regulated through the combined action of plants and biochar. In view of the aforementioned results, the combined application of plants and biochar can enhance the degradation of PAHs and alleviate the stress of PAH on soil microorganisms.