ZHAI Jun,HE Rui,WANG Quan-feng,et al.Enrichment of Dissimilatory Metal-reducing Bacteria for Degradation of Organic Drugs[J].China Water & Wastewater,2021,37(21 21):13-18.
Enrichment of Dissimilatory Metal-reducing Bacteria for Degradation of Organic Drugs
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
21 21
Page:
13-18
Column:
Date of publication:
2021-11-01
- Abstract:
- Dissimilatory metal-reducing bacteria are widely distributed in seabed and river sediments and are closely related to the migration and transformation of various organic substances in the water environment. However, there are relatively few studies on the degradation of refractory organic drugs by dissimilatory metal-reducing bacteria. Therefore, the sediments (A, B and C) from three different sampling sites in Ciqikou section of Jialing River were selected for the enrichment and cultivation of dissimilatory metalreducing bacteria. The dissimilatory metal-reducing bacteria could be enriched in the three sediments by using synthetic iron oxide suspension (Fes), synthetic manganese oxide suspension (Mns), hematite powder (Fep), manganese dioxide powder (Mnp) as the electron acceptors, and the OD600 reached 0.26-1.64 after 7 days of enrichment. When the Mns was used as the electron acceptor in the sediment A, the best enrichment effect was obtained. The maximum removal efficiencies of the two refractory mixed organic drugs［carbamazepine (CBZ) and diclofenac (DCF)］with the initial concentrations of 1.72 mg/L and 1.52 mg/L by the bacteria solution reached 48.92% and 51.18%, respectively, which were similar to the removal efficiencies of CBZ and DCF by GS-15 pure dissimilatory metal-reducing bacteria (61.43% and 66.74%, respectively).
Last Update:
2021-11-01