| 博斯腾湖湿地边缘带农田土壤重金属的污染风险评价 |
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| 引用本文： | 麦麦提吐尔逊.艾则孜,阿吉古丽.马木提,买托合提.阿那依提,艾尼瓦尔.买买提.博斯腾湖湿地边缘带农田土壤重金属的污染风险评价[J].土壤,2018,50(2):369-375. |
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| 作者姓名： | 麦麦提吐尔逊.艾则孜 阿吉古丽.马木提 买托合提.阿那依提 艾尼瓦尔.买买提 |
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| 作者单位： | 新疆师范大学地理科学与旅游学院,新疆师范大学地理科学与旅游学院,新疆师范大学地理科学与旅游学院,新疆大学化学与化工学院 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 对新疆博斯腾湖湿地边缘带农田土壤中8种重金属元素(As、Cd、Cr、Cu、Mn、Ni、Pb和Zn)地球化学特征进行分析。采用污染负荷指数(PLI)、潜在生态风险指数(RI)和生态风险预警指数(IER)对农田土壤重金属污染与环境风险进行评价。结果表明:(1)湿地边缘带农田土壤Pb和Zn呈现重度污染,As、Cd、Cr和Ni轻度污染,Cu轻微污染,Mn无污染。土壤As、Cd、Cr、Cu、Ni、Pb和Zn平均含量处于轻微风险水平。Cd是污染程度与生态风险等级最高的重金属元素;(2)湿地边缘带农田土壤PLI平均值为1.43,呈现轻度污染,RI平均值为20.62,呈现轻微生态风险状态,IER的平均值为–4.53,呈现无警态势。湿地边缘带PLI、RI与IER空间分布格局基本一致;(3)湿地边缘带农田土壤Pb与Zn来源主要受到人类活动的影响,Cr、Cu、Mn与Ni来源主要受到土壤地球化学作用的控制,As与Cd受自然因素和人为因素共同影响。
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| 关 键 词： | 土壤 重金属污染 生态风险 预警 博斯腾湖 |
| 收稿时间： | 2017/1/19 0:00:00 |
| 修稿时间： | 2017/3/2 0:00:00 |
Contamination and Risk Assessment of Heavy Metal Elements in Farmland Soils Along Marginal Zone of Bosten Lake Wetland |
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| Mamattursun EZIZ,Ajigul MAMUT,Mattohti ANAYIT and Anwar MOHAMMAD.Contamination and Risk Assessment of Heavy Metal Elements in Farmland Soils Along Marginal Zone of Bosten Lake Wetland[J].Soils,2018,50(2):369-375. |
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| Authors: | Mamattursun EZIZ Ajigul MAMUT Mattohti ANAYIT and Anwar MOHAMMAD |
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| Institution: | Xinjiang Normal University,Xinjiang Normal University,Xinjiang Normal University,Xinjiang Normal University |
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| Abstract: | The geochemical characteristics of eight heavy metal elements (As, Cd, Cr, Cu, Mn, Ni, Pb and Zn) along the marginal zone of Bosten Lake Wetland were analyzed. The pollution and environmental risks of heavy metals in farmland soils were analyzed based on Pollution Load Index (PLI), Potential Ecological Risk Index (RI) and Ecological Risk Warning Index(IER). Results indicated that: (1) Cd, Pb and Zn fell into high pollution level, where as As, Cr and Ni fell into light pollution level, Cu fell into slightly pollution and Mn fell into no pollution level for farmland soils along the marginal zone of wetland. The average contents of As, Cr, Cu, Ni, Pb and Zn in soils fell into slight ecological risk statue, where as Cd fell into severe ecological risk statue. Cd was a heavy metal element with the highest level of pollution and ecological risk; (2) The average value of PLI for heavy metals in farmland soil along the marginal zone of wetland was 2.22, which showed a light pollution level. The average value of RI was 368.51, which showed a strong ecological risk situation. The average value of IER was 7.06, which showed a serious warning situation. The spatial distribution of PLI, RI and IER were similar. (3) Pb and Zn of farmland soil along the marginal zone of wetland were affected mainly by the human activities, whereas Cr, Cu, Mn and Ni were affected mainly by the geochemical background of soil, and the main sources of As and Cd may be affected by the interaction of human activities and natural factors. |
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| Keywords: | Soil Heavy metal pollution Ecological risk Warning Bosten Lake |
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