Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7480580 | Journal of Environmental Management | 2016 | 6 Pages |
Abstract
A novel bioflocculant (MBF-79) prepared using formaldehyde wastewater as carbon resource was investigated in the study. The optimal conditions for bioflocculant production were determined to be an inoculum size of 7.0%, initial pH of 6.0, and formaldehyde concentration of 350Â mg/L. An MBF-79 of 8.97Â g/L was achieved as the maximum yield. Three main elements, namely C, H, and O, were present in MBF-79 with relative weigh percentages of 39.17%, 6.74%, and 34.55%, respectively. The Gel permeation chromatography analysis indicated that the approximate molecular weight (MW) of MBF-79 was 230Â kDa. MBF-79 primarily comprised polysaccharide (71.2%) and protein (27.9%). Additionally, conditions for the removal of arsenic by MBF-79 were found to be MBF-79Â at 120Â mg/L, an initial pH 7.0, and a contact time 60Â min. Under the optimal conditions, the removal efficiencies of arsenate (0.5Â mg/L) and arsenite (0.5Â mg/L) were 98.9% and 84.6%, respectively. Overall, these findings indicate bioflocculation offers an effective alternative method of decreasing arsenic during water treatment.
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Authors
Haijuan Zhao, Chunying Zhong, Honggao Chen, Jie Yao, Liqing Tan, Youlang Zhang, Jiangang Zhou,