湘中工业区稻田土壤重金属向水体迁移规律

湘中工业区稻田土壤重金属向水体迁移规律(7600字)

摘  要：近几十年来，我国农田土壤重金属污染问题日益突出，部分地区土壤重金属污染已经严重危及粮食生产安全。本文的主要目的是调研株洲县新马村典型重金属含量水平，分析其污染现状及特征，为该区域粮食重金属含量评估提供数据，同时为农田水分管理，灌排水管理提供科学依据，这对农业的发展具有积极指导作用及对保障人体健康也有广泛的现实意义。研究表明新马村Cd、Pb、Zn等存在不同程度污染，其中Cd污染尤为严重，已有多位村民出现Cd中毒，本研究发现新马村水体的Cd含量是国家一级标准的9倍、Pb含量是国标的3倍、Zn含量是国标的2.8倍。本人认为以前遗留在土壤中的重金属是新马村重金属污染的主要来源。
关键词：农田；重金属；新马村；健康

The rule of heavy metal transfering into the water in the rice fields of Hunan central industrial zone

Abstract: In recent decades, Farmland soil heavy metal pollution in China has become increasingly prominent. In some areas, this pollution has brought serious damage to food production.My purpose here is to make a survey of the content of typical heavy metals in Xinma Village, Zhuzhou, and analyzation of the situation and characteristics of the pollution, in order to provide data for assessment as well as an scientific basis for management of irrigation and drainage. The survey, I think, will make significant effect in guiding agricultural production and help maintaining human health. Through my work, it is found out that there is different degree of pollution caused by Cd,Pb and Zn. Particularly, Cd poisoning has lead to poisoning a number of villagers. Content of Cd in Xinma is 9 times the national standard,3 times for Pb and 2.8 for Zn. Heavy metal left in soil is the main source of pollution in Xinma .
Keywords: Farmland; heavy; metal; Xinma village; health

目    录
摘  要    1
1 引言    2
1.1 重金属污染    2
1.2 农田重金属污染    2
1.3 重金属污染研究现状    3
2 重金属污染的来源及治理方案    3
2.1 重金属的主要来源    3
2.2 重金属污染的治理    4
2.2.1 重金属污染防治    4
2.2.2 新马村采取的治理措施    5
3  样品采集与实验分析    5
3.1 研究区简介及采样点的选择    5
3.2 样品采集    5
3.3 实验分析    5
3.3.1 样品重金属含量的测定    5
4 结果与分析    6
4.1 测量值与湖南省重金属元素背景值比较    6
4.2 重金属污染分析    7
5 结论    8
6 研究不足与展望    8
参考文献    8
致    谢    10