Reducing Cr（VI）from Water System via Immobilized Trichoderma hamatum Spores by Embedding Method

doi:10.13560/j.cnki.biotech.bull.1985.2019-0331

Abstract

Abstract: This paper aims to explore a novel method of reducing hexavalent chromium by immobilized microorganisms and to provide a new idea for the further research. Spore-encapsulated microspheres PVA-SA and PVA-SA-PDA with Trichoderma hamatum BSL01 were prepared by embedding method. The performance variation of PVA-SA and PVA-SA-PDA microspheres,such as the reduction efficiency of Cr（VI）and the recycling times,were further studied. The results showed that the reduction efficiency of Cr（VI）by PVA-SA immobilized pellets was 93.4%,and it could be reused 18 cycles. The reduction efficiency of PVA-SA-PDA pellets was 97.2%,and it could be reused 23 cycles. Cr（VI）with a concentration of 50 mg/L was completely reduced using PVA-SA and PVA-SA-PDA in 3 d from the 8th cycle,which was nearly twice as that of free bacteria in reducing Cr（VI）. It is the first time that PDA medium and fungal spores are prepared into nucleocapsid microspheres that are recycled more times and have fine results.

Key words: embedding method, Trichoderma hamatum, Cr（VI）

WANG Wen-jing, LU Song-lin, LIU Xue, LI Si-yu, HAO Xue-meng, LI Yuan-yuan, ZHANG Jie. Reducing Cr（VI）from Water System via Immobilized Trichoderma hamatum Spores by Embedding Method[J]. Biotechnology Bulletin, 2019, 35(9): 70-74.

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