期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 142, 期 -, 页码 388-398出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2017.04.031
关键词
Pycnoporus sanguineus; Hexavalent chromium; Tetrabromobisphenol A; Co-contamination; Cellular characteristics; Bioremediation
资金
- National Natural Science Foundation of China [U1501234, 41673091, 41573091, 41330639]
- Natural Science Foundation of Guangdong Province, China [52013020012808]
- Science and Technology Planning Project of Guangdong Province, China [2015B020215006]
- Science and Technology Program of Guangzhou, China [2014Y2-00523]
- Fundamental Research Funds for the Central Universities [201571, 027]
Simultaneous TBBPA removal and Cr(VI) reduction by Pycnoporus sanguineus together with the effect of these coexisted pollutants on the fungal cellular characteristics were investigated in this study, aiming at illuminating the mechanism involved in the interactions between contaminants and microbial cells. The results revealed that Cr (VI) reduction and TBBPA removal declined from 92.5%, 75.4-30.6%, 44.8% when Cr(VI) concentration increased from 5 to 40 mg/L, respectively. The removal efficiencies for Cr(VI) and TBBPA reached 61.4% and 94% separately under the optimum concentration of TBBPA at 10 mg/L. Subsequent analyses indicated that the negative effect of Cr(VI) of high concentrations on Cr(VI) reduction and TBBPA removal was mainly attributed to the inhibition of fungal growth, intracellular proteins synthesis, cell viability and ATP enzyme activity. Compared with the moderate impact of TBBPA, the cell membrane of P. sanguineus was impaired severely and the surface morphology and intracellular structure changed dramatically in the presence of high concentration of Cr(VI) (above 10 mg/L). This study also suggested that high level of TBBPA (15 and 20 mg/L) promoted the synthesis of intracellular proteins and improved ATP enzyme activity within the first 48 h of the reaction for enhancing the transportation and transformation of TBBPA.
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