干旱区生态环境知识资源中心(Arid): 新疆和硕绿洲农田土壤重金属污染及生态风险

Arid

	新疆和硕绿洲农田土壤重金属污染及生态风险
其他题名	Assessment of Heavy Metal Pollution and Potential Ecological Risks of Farmland Soils Hoshut Oasis, Xinjiang Uyghur Autonomous Region, China
	麦麦提吐尔逊·艾则孜 1; 阿吉古丽·马木提 1; 艾尼瓦尔·买买提 2
来源期刊	地球与环境
ISSN	1672-9250
出版年	2018
卷号	46 期号:1 页码:66-75
中文摘要	新疆和硕绿洲采集82个耕地土壤样品,测定其中As、Cd、Cr、Cu、Mn、Ni、Pb和Zn等8种重金属元素的含量。采用地统计法、污染负荷指数(PLI)和潜在生态风险指数(RI)评估农田土壤重金属污染和潜在生态风险,并讨论重金属主要来源。结果表明:(1)和硕绿洲农田土壤所有重金属元素含量平均值均未超出国家二级标准的限值,Cd、Cr、Ni、Pb和Zn含量的平均值分别超出新疆灌耕土背景值的2.0、1.51、1.18、2.13和8.47倍。(2)农田土壤Cd与Zn呈现中度污染,Cr、Cu、Ni和Pb轻度污染,Mn轻微污染,As无污染。研究区PLI平均值呈现轻度污染。(3)各重金属元素单项生态风险指数从大到小依次为:Cd、Ni、As、Cu、Cr、Zn与Pb。农田RI平均值属于轻微生态风险。重金属元素含量、污染与生态风险空间分布格局各不相同。(4)和硕绿洲农田土壤As、Pb和Zn主要受到人为因素的影响,Cr、Cu、Mn和Ni主要受到土壤地球化学作用的影响,Cd受人为污染和自然因素共同影响。Cd是研究区农田土壤主要的污染因子之一,对农田土壤污染及潜在生态风险的贡献较大,农田土壤Cd污染值得关注。
英文摘要	Total of 82 farmland soil samples were collected from Hoshut oasis, Xinjiang Autonomous Region, China, and contents of eight heavy metal elements (As, Cd, Cr, Cu, Mn, Ni, Pb and Zn) were determined by standard methods. Heavy metal pollution level and potential ecological risks of farmland soils were analyzed based on geostatistical analysis, pollution load index (PLI) and ecological risk index (RI), and the main sources of heavy metals were also discussed. Results indicate that: (1) The average contents of all elements in farmland soils of Hoshut oasis have not exceeded the National Soil Environmental Quality Standard (Grade II). Average contents of Cd, Cr, Ni, Pb and Zn exceed 2.0, 1.51, 1.18, 2.13 and 8.47 times of the background values for irrigation soil of Xinjiang, respectively; (2) Cd and Pb fell into moderate pollution level, whereas Cr, Cu, Ni and Pb fell into light pollution level, with slightly pollution of Mn and no pollution of As for farmland soils. Average PLI value of heavy metal in farmland soil shows a light pollution level; (3) Average value of individual ecological risk index for each heavy metal elements of farmland soil from high to low follow the order as Cd, Ni, As, Cu, Cr, Zn and Pb. Average RI value shows a slight ecological risk situation. The spatial distributions of heavy metal contents, pollution levels and potential ecological risks are different; (4) As, Pb and Zn in farmland soil are affected mainly by human activities. Cr, Cu, Mn and Ni are affected mainly by geochemical background of soil. Cd may be affected by the interaction of human activities and natural factors. Cd is one of the main pollution factors for farmland soil that has considerable influences on contamination and ecological risks of farmland soils. Cd pollution in farmland soil should be a major concern.
中文关键词	耕地 ; 重金属 ; 污染 ; 生态风险 ; 和硕绿洲
英文关键词	soil heavy metal pollution assessment ecological risk spatial analysis hoshut oasis
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6178810
来源机构	新疆大学 ; 新疆师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237457
作者单位	1.新疆师范大学地理科学与旅游学院, 乌鲁木齐, 新疆 830054, 中国; 2.新疆大学化学与化工学院, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	麦麦提吐尔逊·艾则孜,阿吉古丽·马木提,艾尼瓦尔·买买提. 新疆和硕绿洲农田土壤重金属污染及生态风险[J]. 新疆大学, 新疆师范大学,2018,46(1):66-75.
APA	麦麦提吐尔逊·艾则孜,阿吉古丽·马木提,&艾尼瓦尔·买买提.(2018).新疆和硕绿洲农田土壤重金属污染及生态风险.地球与环境,46(1),66-75.
MLA	麦麦提吐尔逊·艾则孜,et al."新疆和硕绿洲农田土壤重金属污染及生态风险".地球与环境 46.1(2018):66-75.