Sustained-release nitrate combined with microbial fuel cell: A novel strategy for PAHs and odor removal from sediment
文献类型： 外文期刊
作者： Chen, Lili 1 ; Zheng, Xiangjian 1 ; Zhang, Kun 1 ; Wu, Baile 3 ; Pei, Xu 1 ; Chen, Weisong 1 ; Wei, Xiaoli 1 ; Luo, Zifeng 1 ; Li, Yongtao 1 ; Zhang, Zhen 1 ;
作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China
2.Inst Agr Resources & Environm, Guangdong Acad Agr Sci, Guangzhou 510640, Peoples R China
3.Arizona State Univ, Sch Sustainable Engn & Built Environm, Ira A Fulton Sch Engn, Tempe, AZ USA
关键词： Sustained-release nitrate; PAHs biodegradation; Acid volatile sulfide (AVS); Microbial fuel cell (MFC); Integrated biostimulation method
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2023 年 455 卷
页码：
收录情况： SCI
摘要： Nitrate addition is a biostimulation technique that can improve both the oxidation of acid volatile sulfide (AVS) through autotrophic denitrification and the biodegradation of polycyclic aromatic hydrocarbons (PAHs) via heterotrophic denitrification. However, during the remediation, parts of the dissolved nitrate in the sediment migrates from the sediment to the overlying water, leading to the loss of effective electron acceptor. To overcome this limitation, a combined approached was proposed, which involved nitrocellulose addition and a microbial fuel cell (MFC). Results indicated the nitrate could be slowly released and maintained at a higher concentration over long term. In the combined system, the removal efficiencies of PAHs and AVS were 71.56% and 89.76%, respectively. Furthermore, the voltage attained for the MFC-nitrocellulose treatment was maintained at 146.1 mV on Day 70, which was 5.37 times higher than that of the MFC-calcium nitrate treatment. Sediments with nitrocellulose resulted in lower levels of nitrate and ammonium in the overlying water. Metagenomic results revealed that the combined technology improved the expression of nitrogen-cycling genes. The introduction of MFC inhibited sulfide regeneration during incubation by suppressing the enzyme activity like EC4.4.1.2. The enhanced biostimulation provided potential for in-situ bioremediation utilizing MFC coupled with slow-released nitrate (i.e., nitrocellulose) treatment.
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