Comparison and distribution of copper oxide nanoparticles and copper ions in activated sludge reactors
Article
Article Title | Comparison and distribution of copper oxide nanoparticles and copper ions in activated sludge reactors |
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ERA Journal ID | 36368 |
Article Category | Article |
Authors | Zhang, Dongqing (Author), Trzcinski, Antoine P. (Author), Oh, Hyun-Suk (Author), Chew, Evelyn (Author), Tan, Soon Keat (Author), Ng, Wun Jern (Author) and Liu, Yu (Author) |
Journal Title | Journal of Environmental Science and Health Part A: Toxic Hazardous Substances and Environmental Engineering |
Journal Citation | 52 (6), pp. 507-514 |
Number of Pages | 8 |
Year | 2017 |
Publisher | Taylor & Francis |
Place of Publication | United States |
ISSN | 1093-4529 |
1532-4117 | |
Digital Object Identifier (DOI) | https://doi.org/10.1080/10934529.2017.1281689 |
Abstract | Copper oxide nanoparticles (CuO NPs) are being increasingly applied in the industry which results inevitably in the release of these materials into the hydrosphere. In this study, simulated waste-activated sludge experiments were conducted to investigate the effects of Copper Oxide NPs at concentrations of 0.1, 1, 10 and 50 mg/L and to compare it with its ionic counterpart (CuSO4). It was found that 0.1 mg/L of CuO NPs had negligible effects on Chemical Oxygen Demand (COD) and ammonia removal. However, the presence of 1, 10 and 50 mg/L of CuO NPs decreased COD removal from 78.7% to 77%, 52.1% and 39.2%, respectively (P < 0.05). The corresponding effluent ammonium (NH4-N) concentration increased from 14.9 mg/L to 18, 25.1 and 30.8 mg/L, respectively. Under equal Cu concentration, copper ions were more toxic towards microorganisms compared to CuO NPs. CuO NPs were removed effectively (72–93.2%) from wastewater due to a greater biosorption capacity of CuO NPs onto activated sludge, compared to the copper ions (55.1–83.4%). The SEM images clearly showed the accumulation and adsorption of CuO NPs onto activated sludge. The decrease in Live/dead ratio after 5 h of exposure of CuO NPs and Cu2C indicated the loss of cell viability in sludge flocs. |
Keywords | CuO nanoparticles; copper ions; waste-activated sludge; biosorption |
ANZSRC Field of Research 2020 | 410402. Environmental assessment and monitoring |
400410. Wastewater treatment processes | |
401199. Environmental engineering not elsewhere classified | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Nanyang Technological University, Singapore |
School of Civil Engineering and Surveying | |
Nanyang Environment and Water Research Institute, Singapore | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3x6y/comparison-and-distribution-of-copper-oxide-nanoparticles-and-copper-ions-in-activated-sludge-reactors
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