| 再生水灌溉对稻田重金属分布的影响 |
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| 引用本文： | 王磊,周璐瑶,胡静博,蔡佳坊,王伟,肖万川,何妙妙.再生水灌溉对稻田重金属分布的影响[J].排灌机械工程学报,2022,40(8):842-849. |
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| 作者姓名： | 王磊 周璐瑶 胡静博 蔡佳坊 王伟 肖万川 何妙妙 |
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| 作者单位： | 1. 浙江省水利河口研究院(浙江省海洋规划设计研究院), 浙江 杭州310020; 2. 浙江省水资源水电管理中心(浙江省水土保持监测中心), 浙江 杭州310000; 3. 杭州萧山水利水电勘察设计有限公司, 浙江 杭州311200; 4. 杭州市余杭区西部水利综合服务中心, 浙江 杭州311100; 5. 苏州市吴中区水务局, 江苏 苏州215104 |
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| 摘 要： | 以南方稻田为研究对象,以再生水安全灌溉调控为目标,基于田间试验,研究了不同灌溉水源(农村生活污水一级处理水R1、二级处理水R2、生态塘净化水R3和河道清水R4)、不同灌溉调控(低水位W1、中水位W2和高水位W3)对土壤-作物典型重金属(镉Cd、铅Pb、铬Cr、铜Cu、锌Zn)质量比变化的影响,分析了农村生活再生水灌溉调控对土壤重金属生态风险.研究表明,农村生活污水再生灌溉稻田Cd,Pb质量比略有升高,Cr,Cu,Zn含量下降;水稻植株各部分器官重金属质量比按植株器官排序从大到小依次为茎,稻米≈叶,重金属组成从大到小依次为Zn,Cr,Pb,Cd,相对灌溉水源,水位调控对水稻植株各部分器官重金属质量比累积影响较小,再生水灌溉条件下水稻籽粒重金属质量比并未明显增加,符合稻谷污染物的限量要求;农村生活污水再生灌溉稻田Cd生态风险系数最高,Cu和Pb次之,Cr和Zn风险系数锌较低,R3水源灌溉下土壤重金属污染潜在生态风险最低,总体上,再生水灌溉并未对土壤造成严重污染,但长期进行再生水灌溉是否会造成重金属污染风险持续增加有待研究.
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| 关 键 词： | 农村生活再生水 稻田水位调控 重金属 生态风险分析 |
| 收稿时间： | 2021-10-15 |
Effects of reclaimed water irrigation on the distribution of heavy metal in paddy fields |
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| WANG Lei,ZHOU Luyao,HU Jingbo,CAI Jiafang,WANG Wei,XIAO Wanchuan,HE Miaomiao.Effects of reclaimed water irrigation on the distribution of heavy metal in paddy fields[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(8):842-849. |
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| Authors: | WANG Lei ZHOU Luyao HU Jingbo CAI Jiafang WANG Wei XIAO Wanchuan HE Miaomiao |
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| Abstract: | Based on the field experiment, the paddy field in South China was taken as the research object, aiming at the safe irrigation regulation of reclaimed water, the effects of different irrigation water sources(rural domestic sewage primary treatment water R1, secondary treatment water R2, ecological pond purified water R3 and river water R4)and irrigation regulations(low water level control W1, medium water level control W2 and high water level control W3)on the changes of typical heavy me-tals(Cd, Pb, Cr, Cu, Zn)in soil and crops were studied, and the ecological risk of rural domestic reclaimed water irrigation regulation on soil heavy metals was analyzed. The results show that the contents of Cd and Pb are increased slightly, but the contents of Cr, Cu and Zn are decreased in paddy field. The contents of heavy metals in rice organs are shown that stem> grain≈leaf. The composition of heavy metals is shown that Zn>Cr>Pb>Cd. Compared with irrigation water sources, water level regulation has little effect on the accumulation of heavy metals in rice organs. The content of heavy metals in rice grain is not increased significantly under reclaimed water irrigation, which meets the limit requirements of pollutants in rice grains. The ecological risk coefficient of Cd in paddy fields under rural domestic sewage reclaimed irrigation is the highest, followed by that of Cu and Pb, the risk coefficient of Cr and Zn is relative lower, and the potential ecological risk under R3 water sources is the lowest. In general, serious pollution to paddy field is not caused by reclaimed water irrigation, but whether a continuous increase in the risk of heavy metal pollution will be caused remains to be studied by long-term reclaimed water irrigation. |
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| Keywords: | rural domestic reclaimed water paddy field water level regulation heavy metals ecological risk analysis |
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