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| A comparative study on ability of humic acids, EDTA and Cr(Ⅵ) to regulate dissimilatory Fe(Ⅲ)-mediated transformation of VFAs in swine wastewater |
| Received:March 27, 2015 |
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| KeyWord:dissimilatory Fe(Ⅲ) reduction;EDTA;humic acids;Cr(Ⅵ);VFAs |
| Author Name | Affiliation | | HE Qing-ming | College of Pharmacy and Chemistry & Chemical Engineering, Taizhou University, Taizhou 225300, China
Key Laboratory of the Three Gorges Reservoir Region′s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China | | WU Hong-dong | Key Laboratory of the Three Gorges Reservoir Region′s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China | | SHI Guang-jun | College of Pharmacy and Chemistry & Chemical Engineering, Taizhou University, Taizhou 225300, China | | LUO Ying | College of Pharmacy and Chemistry & Chemical Engineering, Taizhou University, Taizhou 225300, China |
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| Abstract: |
| Research has showed that environmental factors influence dissimilatory Fe(Ⅲ)-mediated transformation of VFAs in water. Here we examined the effects of humic acids, EDTA and Cr(Ⅵ) at different concentrations on the ability of dissimilatory Fe(Ⅲ) to regulate the degradation of VFAs in swine wastewater at constant temperatures. The reduction of Fe(Ⅲ) oxides was promoted by addition of humic acid to swine wastewater, and the rate of VFAs degradation was accelerated by increasing amount of humic acid. However, trisodium EDTA and Cr(Ⅵ) inhibited the reduction of Fe(Ⅲ) and slowed down the degradation of VFAs. Although these three factors had different mechanisms and processes influencing Fe(Ⅲ) reduction, the final reduction of Fe(Ⅲ) and the balance points of VFAs remained same. |
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