| 何清明,邬红东,石广军,罗颖.腐植酸、EDTA、Cr(Ⅵ)调控猪粪尿废水异化Fe(Ⅲ)还原偶联VFAs的转化能力比较[J].农业环境科学学报,2016,35(3):590-595. |
| 腐植酸、EDTA、Cr(Ⅵ)调控猪粪尿废水异化Fe(Ⅲ)还原偶联VFAs的转化能力比较 |
| A comparative study on ability of humic acids, EDTA and Cr(Ⅵ) to regulate dissimilatory Fe(Ⅲ)-mediated transformation of VFAs in swine wastewater |
| 投稿时间：2015-03-27 |
| DOI：10.11654/jaes.2016.03.024 |
| 中文关键词: 异化Fe(Ⅲ)还原 EDTA 腐植酸 Cr(Ⅵ) VFAs |
| 英文关键词: dissimilatory Fe(Ⅲ) reduction EDTA humic acids Cr(Ⅵ) VFAs |
| 基金项目:泰州市科技支撑计划(社会发展)项目(SSF20150075);江苏省高校自然科学研究面上项目(15KJD610005);江苏省高等学校大学生创新创业训练计划项目(201512917009Y) |
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| 中文摘要: |
| 以人工合成Fe(OH)3作为电子受体,在猪粪尿废水中添加具有铁还原能力的菌株,厌氧恒温培养,通过对猪粪尿废水中添加不同浓度腐植酸、EDTA、Cr(Ⅵ),揭示3种典型理化因素调控猪粪尿废水中异化Fe(Ⅲ)还原偶联挥发性脂肪酸(Volatile fatty acids,VFAs)转化能力。结果表明,电子穿梭体腐植酸促进Fe(Ⅲ)还原,加速VFAs降解,而络合剂EDTA和重金属Cr(Ⅵ)则会阻碍Fe(Ⅲ)还原,减缓VFAs降解。虽然三种影响因子影响机理不同、途径不同,但最终Fe(Ⅲ)还原和VFAs平衡点不变。 |
| 英文摘要: |
| 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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