| 植物塘+人工湿地系统对灌溉水净化及稻米镉的阻控效果 |
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| 引用本文： | 刘寿涛,何钟响,许蒙,李丹阳,罗海艳,刘孝利,铁柏清.植物塘+人工湿地系统对灌溉水净化及稻米镉的阻控效果[J].农业环境科学学报,2019,38(5):1060-1068. |
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| 作者姓名： | 刘寿涛 何钟响 许蒙 李丹阳 罗海艳 刘孝利 铁柏清 |
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| 作者单位： | 湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128,湖南农业大学资源环境学院, 长沙 410128;湖南省灌溉水源水质污染净化工程技术研究中心, 长沙 410128;农业部南方产地污染防控重点实验室, 长沙 410128 |
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| 基金项目： | 国家重点研发计划项目（2017YFD0801505）；湖南省重点研发计划项目（2015NK3015）；农业部、财政部专项（20160418） |
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| 摘 要： | 为了降低灌溉水中Cd向农田中输入,减轻农田重金属Cd污染,降低稻米中Cd含量。本试验选取梭鱼草、狐尾藻、轮叶黑藻为材料,构建3级植物塘+人工湿地系统,研究其对湖南典型矿区Cd超标灌溉水(全量Cd浓度均值≈6.65μg·L~(-1))净化效果及稻米Cd阻控效果,并分析灌溉水进出水浓度与干湿沉降通量对系统净化效果的影响及净化系统中湿地植物的吸附能力。结果表明:梭鱼草、狐尾藻、轮叶黑藻3种水生植物对灌溉水中Cd具有较好的去除能力,经系统净化后灌溉水中全量和可溶态Cd平均去除率分别高达70%和91%,可有效降低湿地系统中重金属Cd浓度并阻止灌溉水中Cd向稻田迁移。湿地进水Cd浓度易随降雨产生波动,但湿地系统对Cd的去除效果不受影响。降雨量与Cd湿沉降通量呈线性正相关,与Cd干沉降通量呈线性负相关。监测期间(2017年4月16日—2017年9月17日)该3级净化系统Cd输入总量为428.46 g,其中干沉降沉降量为20.52 g,湿沉降沉降量为57.60 g,系统有效截留Cd占输入总量的87.94%,干湿沉降作为外源Cd输入源之一,对净化系统的运行效果影响不显著。在湿地正常运行情况下,净化后灌溉区水稻根部、茎鞘、叶片、谷壳和糙米中的Cd含量与未净化灌溉区水稻相比分别下降了5.96、3.83、2.42、0.40 mg·kg~(-1)和0.12 mg·kg~(-1)。研究结果可为典型矿区Cd污染灌溉水净化、降低农田重金属输入量与粮食安全生产提供科学参考和数据支持。
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| 关 键 词： | 植物塘 农田灌溉水 镉 湿地植物 稻米 大气干湿沉降 |
| 收稿时间： | 2018/9/25 0:00:00 |
Effects of plant pond and constructed wetland system on irrigation water purification and rice cadmium control |
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| LIU Shou-tao,HE Zhong-xiang,XU Meng,LI Dan-yang,LUO Hai-yan,LIU Xiao-li and TIE Bai-qing.Effects of plant pond and constructed wetland system on irrigation water purification and rice cadmium control[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2019,38(5):1060-1068. |
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| Authors: | LIU Shou-tao HE Zhong-xiang XU Meng LI Dan-yang LUO Hai-yan LIU Xiao-li and TIE Bai-qing |
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| Institution: | College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China,College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China,College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China,College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China,College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China,College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China and College of Resources and Environment of Hunan Agricultural University, Changsha 410128, China;The Engineering Technology Research Center of Water Pollution Purification of Irrigation Water Source, Hunan Province, Changsha 410128, China;Key Laboratory of Southern Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture, Changsha 410128, China |
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| Abstract: | |
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| Keywords: | plant pond farmland irrigation water cadmium wetland plant rice atmospheric dry and wet deposition |
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