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| Advances in soil heavy metal pollution evaluation based on bibliometrics analysis |
| Received:September 25, 2017 |
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| KeyWord:heavy metals;soils;farmland;agricultural products;pollution evaluation |
| Author Name | Affiliation | | WANG Yu-jun | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | WU Tong-liang | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100049, China | | ZHOU Dong-mei | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China | | CHEN Huai-man | Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: |
| The evaluation of heavy metal pollution in agricultural soils is one of the important issues in the area of agricultural production and food safety. A scientific and rational assessment for heavy metal pollution in soils reflects the condition of soil environmental quality, and provides the basis for soil remediation and sustainable utilization of land resources. In the past 25 years, a variety of evaluation methods have been proposed, in the present study, the development of research hotspots and fields in the area of soil heavy metal evaluation were elucidated based on the bibliometrics analysis and CiteSpace software. The results suggested that the human health and ecological risk assessment have been received much attention, and the source identification, the distribution and speciation of soil heavy metals have been widely concerned. Both of the advantages and disadvantages of four commonly applied pollution index evaluations such as Nemerow index, enrichment factor, geoaccumulation index and potential ecological risk index were discussed. These index evaluation only focuses on the accumulation of heavy metals in the soil, but the quality of agricultural products are less concerned. The comprehensive index combined soil environmental quality and agricultural products quality overcome their disadvantages, which incorporating simultaneously the contents of heavy metals in soil and agricultural products, the soil element background values, the safety standard for maximum levels of contaminants in agricultural products, and the element valence effect in the evaluation of the soil environmental quality standard. |
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