Removal of dimethachlon from soils using immobilized cells and enzymes of a novel potential degrader Providencia stuartii JD

文献类型： 外文期刊

第一作者： Zhane, Cheng

作者： Zhane, Cheng;Wu, Xiaomao;Li, Ming;Pan, Xinglu;Dong, Fengshou;Liu, Xingang;Xu, Jun;Wu, Xiaohu;Zheng, Yongquan

作者机构：

关键词： Dimethachlon; Removal; Providencia smartii JD; Immobilized cells; Immobilized enzymes

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2019 年 378 卷

页码：

收录情况： SCI

摘要： The first potential degrader capable of detoxifying dimethachlon (NDPS) was isolated and identified as Providencia stuartii JD, whose free cells and freely crude enzymes degraded more than 80% and 90% of 50 mg L-1 NDPS in liquid culture within 7 d and 2 h, respectively. Strain JD metabolized NDPS through the typical pathway, in which NDPS was firstly transformed into succinic acid and 3, 5-dichloroanilin, and the latter was then converted to phenol, which was subsequently degraded to muconic acid further subjected to the mineralization. The immobilization obviously improved the stability and adaptability of cells and enzymes. In laboratory non-sterile soils treated by free or immobilized cells and enzymes, 50 mg kg(-1) NDPS decreased to 15.66 and 13.32 mg kg(-1), or 8.32 and 2.18 mg kg(-1) within 7 d, respectively. In field, immobilized cells and enzymes exhibited significantly higher efficiencies in removing 20.250 kg a.i. ha(-1) NDPS wettable powder from soils after 9 d (96.02% and 98.56%) than free cells and enzymes (79.35% and 66.45%). This study highlights that strain JD promises the great potential to remove hazardous NDPS residues and its immobilized cells and enzymes possess the more promising advantages in the bioremediation of NDPS-contaminated soils in situ.

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