Comprehensive evaluation of the impact of CuO nanoparticles on nitrogen transformation in the coastal aquaculture area
Comprehensive evaluation of the impact of CuO nanoparticles on nitrogen transformation in the coastal aquaculture area
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DOI：
10.1016/j.jece.2022.107428
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发表时间：
2022-02
影响因子：
7.7
通讯作者：
Caixia Wang;Haikun Zhang;Pengyuan Liu;Defang Li;Qiusheng Zheng;Xiaoke Hu
中科院分区：
文献类型：
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作者：
Caixia Wang;Haikun Zhang;Pengyuan Liu;Defang Li;Qiusheng Zheng;Xiaoke Hu
CuO纳米颗粒（CuO NPs）越来越多地用于海洋防污涂料和水产养殖业的抗菌防污剂，从而大大增加了其释放到沿海水产养殖环境中的可能性。随着氧化铜纳米粒子的广泛应用，其潜在的环境影响是目前人们高度关注的焦点。本研究研究了CuO NPs对沿海水产养殖区沉积物氮转化的短期（7 d）和长期（35 d）影响。结果表明，长期暴露后，CuO NPs的加入可导致铵态氮浓度升高，硝态氮浓度降低。乳酸脱氢酶（LDA）释放试验和NADH检测表明，CuO NPs能显著抑制细菌活力。宏基因组结果进一步表明，CuO NPs可以明显影响氮代谢途径和糖酵解途径相关的功能基因和代谢酶，证实了CuO NPs对氮转化的抑制作用。总体而言，本研究强调了CuO NPs对沿海水产养殖区沉积物氮转化的影响，并揭示了CuO NPs的富营养化潜力，应控制其释放。
CuO nanoparticles (CuO NPs) are increasingly used in marine antifouling paints and as an antimicrobial antifouling agent in aquaculture industry, thus greatly increasing the probability of their release into the coastal aquaculture environments. With the wide application of CuO NPs, their potential environmental impact is currently highly topical focus of concern. In this study, the short term (7 days) and long term (35 days) effect of CuO NPs on the nitrogen transformation of sediment in the coastal aquaculture area were investigated. It was demonstrated that the addition of CuO NPs could lead to the increase in ammonium and decrease in nitrate concentration after a long-term exposure. Lactate dehydrogenase (LDA) release assays and NADH detection suggested that CuO NPs could significantly inhibit the viability of bacteria. Metagenomic results further indicated that CuO NPs could obviously impact the functional gene and metabolic enzymes related to nitrogen metabolic pathway and glycolysis pathway which confirmed the inhibitory impact of CuO NPs on nitrogen transformation. Overall, this study highlights the impact of CuO NPs on the nitrogen transformation in the sediment of coastal aquaculture area and reveals the release of CuO NPs should be controlled because of their potential for eutrophication.