腐殖酸的氧化还原能力对厌氧消化过程中六氯苯脱氯的影响。
The effect of redox capacity of humic acids on hexachlorobenzene dechlorination during the anaerobic digestion process.
机构信息
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China.
Beijing Vocational Agriculture, Beijing, 100012, People's Republic of China.
出版信息
Environ Sci Pollut Res Int. 2019 Feb;26(6):6099-6106. doi: 10.1007/s11356-018-4056-x. Epub 2019 Jan 7.
Hexachlorobenzene (HCB) dechlorination affected by humic acids (HA) was evaluated in terms of HA redox capacity, HA concentrations, and microbial community, as well as the correlation between HA redox capacity values and HCB concentrations. With addition of HA in the initial stage, redox capacity values increased by 2.19 meq/L (80 mg/L of HA addition, HA), 2.51 meq/L (120 mg/L of HA addition, HA), and 3.64 meq/L (200 mg/L of HA addition, HA), respectively. The addition of HA could prominently enhance the HCB degradation rate. However, the concentration and the redox capacity of HA decreased during the anaerobic digestion process. Illumina MiSeq sequencing showed that microbial community affected by HA. Bacillus, Comamonas, and Pseudomonas were the predominant genera during the HCB dechlorination treatment. Moreover, Bacillus and Pseudomonas can improve HA electron transfer capability and promote the dechlorination of HCB.
六氯苯 (HCB) 的脱氯反应受腐殖酸 (HA) 的影响，本研究从腐殖酸的氧化还原能力、浓度以及微生物群落等方面进行了评估，并探讨了腐殖酸氧化还原能力值与 HCB 浓度之间的相关性。在初始阶段添加 HA 后，氧化还原能力值分别增加了 2.19 meq/L（80 mg/L 的 HA 添加量，HA）、2.51 meq/L（120 mg/L 的 HA 添加量，HA）和 3.64 meq/L（200 mg/L 的 HA 添加量，HA）。HA 的添加可以显著提高 HCB 的降解速率。然而，在厌氧消化过程中，HA 的浓度和氧化还原能力会降低。Illumina MiSeq 测序结果表明，HA 会影响微生物群落。在 HCB 脱氯处理过程中，芽孢杆菌属、食酸菌属和假单胞菌属是主要的优势菌属。此外，芽孢杆菌属和假单胞菌属可以提高 HA 的电子传递能力，从而促进 HCB 的脱氯反应。
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