| 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. |
| 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 |
| 投稿时间：2017-07-22 |
| DOI：10.11654/jaes.2017-1022 |
| 中文关键词: 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 |
| 英文关键词: farmland soils in Northern Hainan Province heavy metals triangular fuzzy number geo-accumulation index potential ecological risk |
| 基金项目:国家自然科学基金项目（21467008）；海南省重大科技计划（ZDKJ2017002） |
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| 中文摘要: |
| 以琼北高背景区农田土壤为研究对象，共采集103个样品，分析农田土壤中12种重金属（As、Cu、Cr、Zn、Pb、Ni、Hg、V、Mn、Co、Cd、Se）的含量，并采用地累积指数法及潜在生态危害指数法评价该地区农田重金属累积程度和潜在的生态风险。结果表明：该地区4类农田土壤（赤红壤、砖红壤、水稻土和火山灰土）中Ni、Cr、Co、Cu、V、Mn平均含量比海南省背景值高1.11~11.06倍，比全国背景值高1.01~5.92倍；和国家土壤环境质量标准比较，Ni、Cr、Cu、Co、V、Mn存在普遍的超标现象；基于三角模糊数的地累积指数表明Ni、Co、Cr和Mn存在累积现象；除火山灰土外，其余3类农田土壤重金属的潜在生态危害综合指数均为轻微生态危害，其中重金属Ni、Hg和Co的累积水平较高。 |
| 英文摘要: |
| In this study, a total of 103 soil samples were collected from farmland located in Northern Hainan Province, where high concentrations 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. |
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