农业环境科学学报2017，Vol.36Issue(11)：2248-2256,9.DOI:10.11654/jaes.2017-1022
琼北农田土壤重金属水平及潜在生态风险
The levels and potential ecological risk of heavy metals in farmland soils in Northern Hainan Province, China
摘要
Abstract
In this study, a total of 103 soil samples were collected from farmland located in Northern Hainan Province, where high concen-trations of heavy metals occur naturally. The concentrations of 12 heavy metals(i.e.,As, Cu, Cr, Zn, Pb, Ni, Hg, V, Mn, Co, Cd, Se)in the soil were measured. The accumulation and potential ecological risk of heavy metals in the soil were assessed using geo-accumulation and potential ecological risk indexes. The results showed that the average Ni, Cr, Co, Cu, V, and Mn concentrations in four types of farmland soils(latosolic red, lateritic, paddy, and volcano lime soils)were 1.11~11.06 times higher than the local background values, and 1.01~5.92 times higher than the national background values. Ni, Cr, Cu, Co, V, and Mn concentrations were higher than the environmental quality standards. Moreover, the geo-accumulation index based on triangular fuzzy numbers showed that Ni, Co, Cr, and Mn accumulated in the soil. Except for the higher background level in volcano lime soil, a slight potential ecological risk was detected in the other farmland soils, where Ni, Hg and Co accumulation levels were higher than those of the other heavy metals.关键词
琼北农田土壤/重金属/三角模糊数/地累积指数/潜在生态风险Key words
farmland soils in Northern Hainan Province/heavy metals/triangular fuzzy number/geo-accumulation index/potential ecological risk分类
资源环境引用本文复制引用
李雪,李佳桐,孙宏飞,俞花美,葛成军..琼北农田土壤重金属水平及潜在生态风险[J].农业环境科学学报,2017,36(11):2248-2256,9.基金项目
国家自然科学基金项目(21467008) （21467008）
海南省重大科技计划(ZDKJ2017002) Project supported:The National Natural Science Foundation of China(21467008) （ZDKJ2017002）
Major Science and Technology Programme of Hainan Province (ZDKJ2017002) （ZDKJ2017002）
