| 丰枯水期鄱阳湖表层水中羟基自由基浓度及其抗生素净化作用研究 |
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| 引用本文： | 肖远东,彭维维,安琦,蔡悦,朱韻洁,黄华军,方汉孙.丰枯水期鄱阳湖表层水中羟基自由基浓度及其抗生素净化作用研究[J].环境科学学报,2018,38(8):2965-2973. |
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| 作者姓名： | 肖远东 彭维维 安琦 蔡悦 朱韻洁 黄华军 方汉孙 |
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| 作者单位： | 江西农业大学国土资源与环境学院;江西农业大学江西省鄱阳湖流域农业资源与生态重点实验室 |
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| 基金项目： | 国家自然科学基金青年基金项目（No.21607065）；江西省自然科学基金青年基金项目（No.20151BAB213036） |
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| 摘 要： | 鄱阳湖位于我国农业大省江西省,表层湖水中羟基自由基(HO·)引发的水体光化学反应,可能对流域内的农业污染物—抗生素具有潜在的净化作用.因此,本研究以氙灯模拟太阳光测得鄱阳湖及周边河流羟基自由基表观光量子产率(ΦHO·),在丰水期为(0.57~10.33)×10~(-5),枯水期为(0.45~3.52)×10~(-5).丰水期溶解态有机物(DOM)对HO·形成的贡献率为85.8%~98.7%,枯水期为58.5%~97.6%,表明DOM是HO·形成的主导物质.可能由于水体混合均匀,丰水期除抚河水体可能有其特殊的化学组成外,其它湖泊与河流的水化学组成接近,表现出随溶解态有机碳含量升高,ΦHO·呈先增大后减小的现象.枯水期水体各化学组成含量显著高于丰水期,光屏蔽与淬灭可能起主要作用,只有当NO_2~-含量较高时才显示出对HO·形成的贡献.依据太阳光强可得鄱阳湖丰水期及枯水期表层水HO·的稳态浓度分别为9.51×10~(-16)与4.92×10~(-17)mol·L~(-1),湖水中5种抗生素在HO·作用下的半衰期分别为2.3~13.9 d与44.5~268.7 d,丰水期鄱阳湖表现出更高的光化学净化能力.
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| 关 键 词： | 鄱阳湖 羟基自由基 自然净化 抗生素 |
| 收稿时间： | 2017/12/27 0:00:00 |
| 修稿时间： | 2018/4/11 0:00:00 |
Levels of hydroxyl radicals and its purification on antibiotics in surface waters of Poyang Lake during wet and dry seasons |
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| XIAO Yuandong,PENG Weiwei,AN Qi,CAI Yue,ZHU Yunjie,HUANG Huajun and FANG Hansun.Levels of hydroxyl radicals and its purification on antibiotics in surface waters of Poyang Lake during wet and dry seasons[J].Acta Scientiae Circumstantiae,2018,38(8):2965-2973. |
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| Authors: | XIAO Yuandong PENG Weiwei AN Qi CAI Yue ZHU Yunjie HUANG Huajun and FANG Hansun |
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| Institution: | College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045,College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045,College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045,College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045,College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045,1. College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045;2. Key Laboratory of Poyang Lake Basin Agricultural Resource and Ecology of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045 and 1. College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045;2. Key Laboratory of Poyang Lake Basin Agricultural Resource and Ecology of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045 |
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| Abstract: | |
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| Keywords: | Poyang Lake hydroxyl radical natural purification process antibiotics |
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