Influence of nanoscale zero-valent iron and magnetite nanoparticles on anaerobic digestion performance and macrolide, aminoglycoside, beta-lactam resistance genes reduction
Influence of nanoscale zero-valent iron and magnetite nanoparticles on anaerobic digestion performance and macrolide, aminoglycoside, beta-lactam resistance genes reduction
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纳米级零价铁和磁铁矿纳米粒子对厌氧消化性能和大环内酯类、氨基糖苷类、β-内酰胺类耐药基因减少的影响
DOI：
10.1016/j.biortech.2019.122139
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发表时间：
2019
影响因子：
11.4
通讯作者：
Cao Jiao
中科院分区：
文献类型：
--
作者：
Xiang Yinping;Yang Zhaohui;Zhang Yanru;Xu Rui;Zheng Yue;Hu Jiahui;Li Xiaoyang;Jia Meiying;Xiong Weiping;Cao Jiao
通过一系列100 d的半连续中温厌氧消化试验，研究了纳米零价铁（NZVI）和纳米磁铁矿（Fe 3 O 4 NPs）对厌氧消化（AD）性能的影响。结果表明，添加0.5 g/L的Fe 3 O 4纳米颗粒和1.0 g/L的NZVI可使沼气产量分别提高24.44%和21.66%。此外，还对5个广泛分布的抗生素耐药基因（ermF，ermA，ermT，aac（6′）-IB，blaOXA-1）的丰度进行了研究。在AD过程中，aac（6′）-IB和blaOXA-1的含量明显下降，平均去除率分别为95.69%和44.82%。与对照组相比，NZVI组的大多数ARGs，尤其是ermA和dermT的丰度较低。结果表明，NZVI和Fe 3 O 4 NPs的投加有利于污泥厌氧消化，NZVI有利于部分ARGs的去除。
The effect of nanoscale zero-valent iron (NZVI) and magnetite nanoparticles (Fe3O4NPs) on anaerobic digestion (AD) performance was investigated through a series of 100-day semi-continuous mesophilic anaerobic digestions. The results indicated that biogas production had increased by 24.44% and 21.66% with the addition of 0.5 g/L Fe3O4NPs and 1.0 g/L NZVI, respectively. Besides, the abundance of five widespread antibiotic resistance genes (ARGs) (ermF,ermA,ermT,aac(6′)-IB,blaOXA-1) was also studied. The decrease in abundance ofaac(6′)-IB andblaOXA-1 was observed during the AD process with an average removal rate of 95.69% and 44.82%, respectively. Most of the ARGs, especiallyermA andermT, were less abundant in NZVI group compared with control group. The overall results suggested that the addition of NZVI and Fe3O4NPs contributed to a better sludge anaerobic digestion performance, and NZVI was beneficial to the removal of some ARGs.