期刊
ENVIRONMENTAL RESEARCH
卷 200, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111708
关键词
Environmental pollution; Actinomycetes; Bioflocculant; Heavy metal; Wastewater treatment; Toxicity
资金
- National Natural Science Foundation of China [41950410573, 91951205, 31670009]
- Postdoctoral Science Foundation of China [2019M663213]
- King Saud University, Riyadh, Saudi Arabia [RSP-2021/70]
The study isolated an endophytic actinobacterial species producing bioflocculant from heavy metal contaminated marine environment, which showed excellent flocculating activity and heavy metal sorption capacity, indicating it as an effective alternative method for environmental management in reducing heavy metals.
The removal of toxic heavy metal ions from contaminated environments is a great challenge and requires an alternative rapid, efficient, economical bioremediation approach. Henceforth, bioflocculant producing endophytic actinobacterial sp. was isolated from heavy metal contaminated marine environments for heavy metal biosorption process. After molecular characterization, the isolated actinomycete starin was Nocardiopsis sp. GRG 3 (KT235642). It was indicated that the maximum flocculating activity of 80.90% with glucose, and yield is 4.52 g L1. The optimum flocculating activity was reached at pH 7 in the presence of CaCl2 ions. Further, the bioflocculent produced Nocardiopsis sp. GRG 3 (KT235642) was characterized by fourier transform infrared analysis spectra (FTIR) and displayed the presence of carboxyl, hydroxyl, amino groups and characteristic of more polysaccharide and protein. The heavy metal sorption by bioflocculant Nocardiopsis sp. GRG 3 (KT235642) was effectively removed 55.90% Cd, 85.90% Cr, 74.7% Pb, and 51.90% Hg. Therefore, this study was proved that the bioflocculant derived from endophytic actinobacteria, Nocardiopsis sp. GRG 3 (KT235642) as a effective alternative method for decreasing the heavy metals towards sustainable environmental management.
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