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Potential of Myriophyllum aquaticum for phytoremediation of water contaminated with tetracycline antibiotics and copper

文献类型： 外文期刊

作者： Guo, Xuan 1 ; Liu, Mingming 3 ; Zhong, Hua 1 ; Li, Peng 1 ; Zhang, Chengjun 1 ; Wei, Dan 1 ; Zhao, Tongke 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China

2.China New Zealand Joint Lab Water Environm Res, Beijing 100097, Peoples R China

3.Beijing Beike Environm Engn Co Ltd, Beijing 100080, Peoples R China

关键词： Tetracyclines antibiotics; Copper; Myriophyllum aquaticum; Hydroponic microcosm; Phytoremediation

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）

ISSN： 0301-4797

年卷期： 2020 年 270 卷

页码：

收录情况： SCI

摘要： Water pollution caused by antibiotics and heavy metals has attracted considerable concern, and efficient approaches are urgently needed for their removal. The objective of this study was to investigate the potential of Myriophyllum aquaticum for long-term phytoremediation of wastewater containing tetracycline (TC) antibiotics and copper. Seven hydroponic microcosms were constructed, spiked with tetracycline, oxytetracycline (OTC) and chlortetracycline (CTC) (300-30,000 mu g/L), alone or simultaneously with Cu (II), and operated for 12 weeks. The TC removal efficiencies using the hydroponic microcosms here were commensurate or higher than those in previous studies. However, the Cu/TC ratio greatly affected the removal, accumulation of TCs by M. aquaticum, and plant growth. Low levels of Cu (II) (<1000 mu g/L) promoted TC removal, but excessive Cu (II) (>10,000 mu g/L) impeded it. Mass balance analysis showed that most TCs (45%-64% on average) accumulated in the roots of M. aquaticum. Plant biomass was correlated with the removal of COD, TN, TP, and NH4+-N(p <= 0.05) but not with removal of the TCs. Proteobacteria, Bacteroidetes, and Fusobacteria were dominant in the microbial communities, but they showed little correlation with the TC removal. M. aquaticum can be employed as an effective means of TC removal from water. The co-existence of heavy metals should be considered when evaluating the removal potential of TCs in phytoremediation.

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