Spatial assessment of farmland soil pollution and its potential human health risks in China
| Autor: | Fu Chen, Siyan Zeng, Gang-Jun Liu, Yongjun Yang, Shaoliang Zhang, Jing Ma |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Pollution
China Farms Food Safety Environmental Engineering 010504 meteorology & atmospheric sciences media_common.quotation_subject 010501 environmental sciences Risk Assessment 01 natural sciences Soil management Environmental protection Environmental monitoring Humans Soil Pollutants Environmental Chemistry Waste Management and Disposal Ecosystem 0105 earth and related environmental sciences media_common Health risk assessment business.industry Food safety Hazard Soil contamination Environmental science Environmental Pollution business Environmental Monitoring |
| Zdroj: | Science of The Total Environment. 687:642-653 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2019.05.291 |
| Popis: | Soil pollution severely threatens agro-ecosystem stability. It is important to accurately understand the status of farmland pollution in order to protect national food safety and human health. However, information of the combined pollution level of Chinese farmland soil and associated human health risk at the national scale is relatively lacking. In this study, 5597 samples from 1781 farmland soil sites were obtained from 553 reports and combined into pollution databases of heavy metals, organochlorines, and polycyclic aromatic hydrocarbons. Based on the data obtained, this paper demonstrated the current pollution status of farmland soil, and assessed the subsequent human health risk. Results showed that the combined pollution ratio of Chinese farmland soil was 22.10%, with 1.23% of severe pollution level. Moreover, the total non-carcinogenic hazard quotients of farmland soil pollution were within the safety threshold for adults, but there was a slight non-carcinogenic risk for children. For adults, the ratio of total farmland area to total carcinogenic risk quotients above the safety threshold of 1 × 10−5 was only 1.02%, but for children, the ratio was as high as 20.75%. On the other side, food crop and vegetable plantations were the priority control farmland soil compared to other types. Meanwhile, Yunnan, Hunan, Anhui, Henan, and Liaoning were selected as the priority control provinces due to their severe pollutions and high human health risks. This study has provided a comprehensive pollution and health risk assessment. Furthermore, the spatial distribution might provide as the scientific support for accelerating the mapping of soil pollution in China, as well as developing the policy for the contaminated farmland soil management. |
| Databáze: | OpenAIRE |
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