摘要
以攀枝花市盐边县某芒果种植区为研究区,采集47个表层土壤(0~20 cm)样本,测试Cd、As、Cr、Cu、Ni和Pb6种重金属元素含量。利用ArcGIS空间分析功能对土壤中重金属元素的空间分布特征进行分析,并采用单因子污染指数法、内梅罗综合污染指数法和潜在生态危害指数法对研究区土壤重金属污染程度进行评价。结果表明:研究区Cd全部超标,As、Cu和Pb少量超标,仅Cr和Ni符合国家土壤环境质量标准要求;六种重金属含量的平均值均超过四川省土壤元素背景值;单因子污染指数评价结果表明研究区Cd处于中度-重度污染,其余重金属未污染研究区土壤;内梅罗综合污染指数评价结果表明研究区处于中度污染和重度污染的点位比例各占34.04%和65.96%;Cd、As、Cr、Cu、Ni和Pb单项潜在生态危害指数依次为980.069、18.486、1.983、5.005、6.285、4.640,综合潜在生态危害指数在777.344~924.348,总体呈现的Cd潜在生态危害较强,建议采取措施进行防控。
Taking a mango planting area in Yanbian County of Panzhihua City as the research area,47 surface soil(0~20 cm)samples were collected to test the content of 6 heavy metals in Cd,As,Cr,Cu,Ni and Pb.The spatial distribution characteristics of heavy metals in soil were analyzed by using ArcGIS spatial analysis function,and the pollution degree of heavy metals in soil was evaluated by single factor pollution index method,Nemero comprehensive pollution index method and potential ecological hazard index method.The results show that the Cd in the study are exceed the standard,and the As,Cu and Pb are slightly exceeded.Only Cr and Ni meet the national soil environmental quality standards.The average value of the six heavy metals exceed the background value of soil elements in Sichuan Province.The impact of single factor pollution index indicates that the Cd in the study area is in moderate-severe pollution and the others did not pollute the soil in the study area.The results of Nemero comprehensive pollution index show that the proportion of sampling points in moderate pollution and severe pollution accounted for 34.04%and 65.96%respectively..The single potential ecological hazard indexes of Cd,As,Cr,Cu,Ni and Pb are 980.069,18.486,1.983,5.005,6.285 and 4.640 respectively,and the comprehensive potential ecological hazard index is between 777.344 and 924.348.The overall potential ecological hazards of Cd are relatively strong,suggesting that measures should be taken to prevent and control.
作者
汪婷
王哲
易发成
程强强
蒋虎
王成霞
赵秋泉
曾秋平
WANG Ting;WANG Zhe;YI Fa-cheng;CHENG Qiang-qiang;JIANG Hu;WANG Cheng-xia;ZHAO Qiu-quan;ZENG Qiu-ping(School of environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China;School of Earth and Space Science, University of Science and Technology of China, Hefei 230000, China;Lpgistics Management Office of Panzhihua University, Panzhihua 617000, China)
出处
《科学技术与工程》
北大核心
2020年第16期6688-6696,共9页
Science Technology and Engineering
基金
国家自然科学基金(41402248)
四川省科技厅重点研发项目(2018SZ0298)
国家重点研发计划项目(2019YFC1803500,2019YFC1803503,2019YFC1803504)
攀枝花市科技计划(2017CY-N-8)
四川省教育厅科研项目(16ZB0150)
西南科技大学龙山人才科研计划(17LZX613,18LZX638)
干热河谷特色生物资源开发四川省高校重点实验室鸡蛋花专项基金(JDH-2019-E-01)。
关键词
攀西
芒果产区
土壤
重金属污染
空间分布
污染评价
Panxi
mango producing area
soil
heavy metal pollution
spatial distribution
pollution evaluation
作者简介
第一作者:汪婷(1994—),女,硕士研究生,研究方向:土壤重金属污染评价,E-mail:wtsunwt@163.com;通信作者:王哲(1979—),男,博士,副研究员,研究方向:近地表环境下元素迁移及人工地球化学屏障,土壤重金属污染评价与修复、重金属污染修复钝化剂开发及土壤环境质量与污染评价系统开发,E-mail:wz2004@126.com。
