| 太湖流域稻田湿地对低污染水中氮磷的净化效果 |
| |
| 引用本文： | 薛利红,杨林章.太湖流域稻田湿地对低污染水中氮磷的净化效果[J].环境科学研究,2015,28(1):117-124. |
| |
| 作者姓名： | 薛利红 杨林章 |
| |
| 作者单位： | 江苏省农业科学院农业资源与环境研究所, 江苏 南京 210014 |
| |
| 基金项目： | 国家水体污染控制与治理科技重大专项(2012ZX07101-004);太湖水污染治理专项资金(第七期)技术示范类科研课题招标项目(20130209);江苏省农业科技自主创新项目(CX(14)2050) |
| |
| 摘 要： | 对太湖流域稻田湿地设置3种布水设计——地表漫流式、串形沟灌渗滤式和弓形沟灌渗滤式, 研究连续进水方式下3种布水设计的稻田湿地对低污染水中氮、磷的净化效果及其产量效应. 结果表明:①在水稻拔节期和灌浆期,稻田湿地对低污染水中TN和TP的去除率分别可达77%~93%和87%~96%,稻田排水中ρ(TN)均在2 mg/L以下. ②3种布水设计对TN的去除率表现为漫流式>弓形沟灌渗滤式>串形沟灌渗滤式；对TP的去除率则以弓形沟灌渗滤式最高,串形沟灌渗滤式最差,但二者间差异不显著. ③弓形沟灌渗滤处理由于沟渠占田面积比例相对比较适宜,水稻籽粒产量最高(8 520 kg/hm2),比传统的漫流型稻田湿地增产5.2%；而串形沟灌渗滤处理因其沟渠占田面积比例(约14%)较大,水稻籽粒产量最低. 研究结果证实,利用太湖流域广泛存在的稻田湿地来净化周围的低污染水方法可行且效果较好.
|
| 关 键 词： | 稻田湿地 低污染水 TN TP 去除率 产量 太湖流域 |
| 收稿时间： | 2014/2/7 0:00:00 |
| 修稿时间： | 2014/8/21 0:00:00 |
Purification of Water with Low Concentrations of N and P in Paddy Wetlands in Taihu Lake Region |
| |
| XUE Lihong and YANG Linzhang.Purification of Water with Low Concentrations of N and P in Paddy Wetlands in Taihu Lake Region[J].Research of Environmental Sciences,2015,28(1):117-124. |
| |
| Authors: | XUE Lihong and YANG Linzhang |
| |
| Affiliation: | Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China |
| |
| Abstract: | Abstract:Water eutrophication is one of the most challenging environmental problems in the world. The Taihu Lake Region in China is a typical eutrophication area. The discharge of domestic wastewater is one of the main sources of eutrophication. The effluent from wastewater treatment plants was as highly concentrated as 10 mg/L and was a pollution source to the natural water body. To effectively treat the effluent with low concentrations of N and P with low costs and in combination with a resources recycling function, different paddy wetland systems were designed to purify the effluent including traditional flooding overflow type and furrow irrigation infiltration type with two different ditch lengths in the paddy fields. In the two ditches, one was 116.0 m long and string-shaped, with the other one was 82.5 m long and arch shaped. The results showed that:1) At jointing and grain-filling stage of rice, N and P removal efficiencies in paddy wetlands were up to 77%-93% and 87%-96%, respectively, and TN concentrations in the discharge were uniformly lower than 2 mg/L. 2) The removal efficiency was highest for TN in overflow type wetlands and lowest in string-shape furrow irrigation infiltration type wetlands, while for TP, the arch-shaped furrow irrigation infiltration type paddy wetlands was the highest, but the differences were not significant among the three treatments. 3) The grain yield was the highest (8520 kg/hm2) in arch-shaped furrow irrigation infiltration type paddy wetlands due to the suitable area ratio of ditches to fields (8%), and increased about 5.2% compared with the overflow-type paddy wetlands, and lowest in string-shaped furrow irrigation infiltration type paddy wetlands for its high area ratio of ditches to fields (about 14%). This indicated that using widespread paddy fields in Taihu Lake Region to purify the surrounding effluent was effective. |
| |
| Keywords: | paddy wetlands low-concentration polluted water TN TP removal efficiency yield Taihu Lake Region |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学研究》浏览原始摘要信息 |
|
点击此处可从《环境科学研究》下载全文 |
|
