数字农科院2.0

Rapid Degradation Of Dimethomorph In Polluted Water And Soil By Bacillus Cereus Wl08 Immobilized On Bamboo Charcoal-Sodium Alginate

文献类型： 外文期刊

作者： Zhang, C; Li, JH; Wu, XM; Long, YH; An, HM; Pan, XL; Li, M; Dong, FS; Zheng, YQ

作者机构：

关键词： Dimethomorph; Bacillus Cereus Wl08; Immobilization; Degradation; Bioremediation

期刊名称： JOURNAL OF HAZARDOUS MATERIALS

ISSN： 0304-3894

年卷期： 2020 年 398 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： The presence of hazardous dimethomorph residues in the environment poses a threat to birds, aquatic organisms and mammals. The novel pure strain Bacillus cereus WL08 responsible for detoxifying dimethomorph was isolated from dimethomorph-polluted soils. The immobilized system of WL08 was developed using bamboo charcoal (BC) and sodium alginate (SA). Immobilization significantly improved tolerance and stability of strain WL08. Under optimal conditions of pH 7.0 and 30 degrees C, free and immobilized WL08 degraded 66.95% and 96.88% of 50 mg/L dimethomorph within 72 h, respectively. Moreover, strain WL08 effectively degraded dimethomorph to simple products which were lower toxic than dimethomorph. In a continuous reactor system, immobilized WL08 removed 85.61% of dimethomorph for 30 d at an influent concentration of 50-100 mg/L. In the field soil sprayed with 4.20 kg a.i./ha 80% dimethomorph water dispersible granule (WDG) was treated by immobilized WL08, the lower half-life (1.93 d) was observed, as compared with free WL08 (4.28 d) and natural dissipation (23.82 d). Immobilized WL08 can be considered as a tool for the removal of dimethomorph in water-soil systems. This study provides a feasible microbe-based strategy for bioremediation of dimethomorph-polluted environments.

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