Use of Bacillus-siamensis-inoculated biochar to decrease uptake of dibutyl phthalate in leafy vegetables
文献类型： 外文期刊
作者： Feng, Fayun 1 ; Chen, Xiaolong 3 ; Wang, Qiong 3 ; Xu, Wenjun 4 ; Long, Ling 5 ; EL-Masry, Ghada Nabil 6 ; Wan, Qun 1 ; Y 1 ;
作者机构： 1.Minist Sci & Technol, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, Nanjing 210014, Jiangsu, Peoples R China
2.Minist Agr, Key Lab Control Technol & Stand Agroprod Safety &, Nanjing 210014, Jiangsu, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Nanjing 210014, Jiangsu, Peoples R China
4.Qingdao Univ Sci & Technol, Dept Biotechnol, Qingdao 266042, Shandong, Peoples R China
5.Guangxi Univ, Coll Agr, Nanning 530005, Peoples R China
6.Agr Res Ctr, Plant Protect Inst, Cairo, Egypt
关键词： Biochar; Dibutyl phthalate; Bacillus siamensis sp.; Immobilization; Bioremediation
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）
ISSN： 0301-4797
年卷期： 2020 年 253 卷
页码：
收录情况： SCI
摘要： Dibutyl phthalate (DBP) is a frequently detected farmland contaminant that is harmful to the environment and human health. In this study, a DBP-degrading endophytic Bacillus siamensis strain T7 was immobilized in rice husk-derived biochar for bioremediation of DBP-polluted agricultural soils. The effects of this microbe-biochar composite on the soil prokaryotic community and the mechanism by which it regulates DBP degradation, were also investigated. A supplement of T7-biochar composite not only significantly boosted DBP biodegradation in soil by raising the DBP degradation rate constant and half-life from 0.1979 d(-1) and 2.3131 d to 0.2434 d(-1) and 2.1062 d, respectively, but also impeded DBP uptake by leafy vegetables. The general bioremediation effect of T7-biochar alliance excelled pure T7 suspensions and biochar, by trapping more DBP and boosting its complete degradation in soil. Besides, the combination of strain T7 and biochar can increase the proportion of some beneficial bacteria and boost the functional diversity of soil prokaryotic community, then to a certain extent may reverse the negative effect of DBP pollution on the agricultural soils. These results indicate that the rice-husk-derived biochar is a proper media when utilizing functional microbes into environmental treatment. Overall, T7-biochar composite is a promising soil modifier for soil bioremediation and the production of DBP-free crops.
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