|
| The levels and potential ecological risk of heavy metals in farmland soils in Northern Hainan Province, China |
| Received:July 22, 2017 |
| View Full Text View/Add Comment Download reader |
| KeyWord:farmland soils in Northern Hainan Province;heavy metals;triangular fuzzy number;geo-accumulation index;potential ecological risk |
| Author Name | Affiliation | E-mail | | LI Xue | College of Resources and Environment, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China | | | LI Jia-tong | College of Resources and Environment, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China | | | SUN Hong-fei | College of Resources and Environment, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China | 646210235@qq.com | | YU Hua-mei | College of Resources and Environment, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China | | | GE Cheng-jun | College of Resources and Environment, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
College of Life Sciences, Zhejiang University, Hangzhou 310058, China | |
|
| Hits: 2905 |
| Download times: 3197 |
| Abstract: |
| 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. |
|
|
|
