RETRACTED: Carbaryl waste-water treatment by Rhodopseudomonas sphaeroides
| Autor: | Yuan Wu, Ying Zhang, Ning Li, Bo Cao, Pan Wu, Yanxi Hou, Yanling Wang, Liming Jin, Feifei Zhu, Zhaobo Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Chemistry Starch Health Toxicology and Mutagenesis 0208 environmental biotechnology Public Health Environmental and Occupational Health 02 engineering and technology General Medicine General Chemistry Rhodopseudomonas sphaeroides 010501 environmental sciences 01 natural sciences Pollution 020801 environmental engineering chemistry.chemical_compound Wastewater Carbaryl Hydrolase Environmental Chemistry Sewage treatment Food science 0105 earth and related environmental sciences |
| Zdroj: | Chemosphere. 233:597-602 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2019.05.237 |
| Popis: | Carbaryl wastewater treatment and the resource recycling of biomass as sludge by Rhodopseudomonas sphaeroides (R. sphaeroides) with the assistance of starch processing wastewater (SPW) was investigated in this research. It was observed that carbaryl was not degraded under the 100, 500 mg/L COD groups. The addition of SPW assisted R. sphaeroides to degrade carbaryl efficiently. Carbaryl removal reached 100% after 5 days under the optimal group (3500 mg/L). Interestingly, carbaryl in the mixed wastewater began to be degraded after day 1. Further research indicated that cehA gene was expressed after day 1. Subsequently, carbaryl hydrolase was synthesized under gene regulation. Analysis revealed that cehA and carbaryl hydrolase were adaptive gene expressions and enzymes. Carbaryl as stimulus signal started cehA gene expression through signal transduction pathway. This process took one day for R. sphaeroides. However, organics in 100, 500 mg/L COD groups were deficient, which could not maintain R. sphaeroides growth for over one day. Organics in SPW provided sufficient carbon sources for R. sphaeroides under other groups. The method could complete the mixed (SPW and carbaryl) wastewater treatment, carbaryl removal, the resource recycling of R. sphaeroides biomass as sludge simultaneously. |
| Databáze: | OpenAIRE |
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