Biological treatment of wastewater with high concentrations of zinc and sulfate ions from zinc pyrithione synthesis
| Autor: | Xiang Haihong, Michal Green, Sheldon Tarre, Hui-jun He, Guangming Zeng, Yan Cheng, Yan Zhou, Peng Zhixiong, Wen Shan, Chunping Yang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
biology
Precipitation (chemistry) Chemistry Metals and Alloys chemistry.chemical_element 02 engineering and technology Zinc 010501 environmental sciences 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics biology.organism_classification 01 natural sciences Ion chemistry.chemical_compound Wastewater Toxicity Materials Chemistry Sulfate 0210 nano-technology Bacteria 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 27:2481-2491 |
| ISSN: | 1003-6326 |
| Popis: | An enriched and domesticated bacteria consortium of sulfate-reducing bacteria (SRB) was used to treat wastewater from zinc pyrithione (ZPT) production, and the effects of different reaction parameters on sulfate reduction and zinc precipitation were evaluated. The single-factor experimental results showed that the removal rates of Zn2+ and SO42− decreased with an increased ZPT concentration ranging from 3.0 to 5.0 mg/L. Zn2+ and SO42− in wastewater were effectively removed under the conditions of 30–35 °C, pH 7–8 and an inoculum concentration of 10%–25%. The presence of Fe0 in the SRB system enhanced Zn2+ and SO42− removal and may increase the resistance of SRB to the toxicity of Zn2+ and ZPT in wastewater. A Box–Behnken design was used to evaluate the influence of the main operating parameters on the removal rate of SO42−. The optimum parameter values were found to be pH 7.45, 33.61 °C and ZPT concentration of 0.62 mg/L, and the removal rate of SO42− reached a maximum of 91.62% under these optimum conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect