期刊
BIORESOURCE TECHNOLOGY
卷 101, 期 6, 页码 1668-1674出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.09.083
关键词
Endophytics fungus; Hyperaccumulator; Biosorbent selection; Biosorption; Cadmium
资金
- National Science Fund for Distinguished Young Scholars [50725825]
- Key Program of National Natural Science Foundation of China [50830301]
- Xiangjiang Water Environmental Pollution Control Project
- National Key Science and Technology Project for Water Environmental Pollution Control [2008ZX07212001]
- Key Special Science and Technology Project for Energy Saving and Emission Reduction of Hunan Province [2008SK1002]
A novel technology to obtain highly efficient biosorbent from the endophytes of a hyperaccumulator is reported. This technology is more convenient than the traditional method of obtaining biosorbents by experimentally screening many types of biomass by trial and error. Using this technology, endophytic fungus (EF) LSE10 was isolated from the cadmium hyperaccumulator Solarium nigrum L It was identified as Microsphaeropsis sp. When cultured in vitro, the biomass yield of this EF was more than twice that of none-endophytic fungus (NEF) Rhizopus cohnii. Subsequently, it was used as a biosorbent for biosorption of cadmium from the aqueous solution. The results showed that the maximum biosorption capacity was 247.5 mg/g (2.2 mmol/g) which was much higher than those of other adsorbents, including biosorbents and activated carbon. Carboxyl, amino, sulphonate and hydroxyl groups on EF LSE10 surface were responsible for the biosorption of cadmium. (C) 2009 Elsevier Ltd. All rights reserved.
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