| 云南会泽东北部地区重金属环境污染评价 |
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| 关键词:Huize county of Yunnan province heavy metals environmental assessment pollution indices EGAPI-GB15618 |
| 基金项目:中国地质调查局地质调查项目“云南省滇中-滇东北地区1:25万土地质量地球化学调查项目”(编号: DD20160313-04) |
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| 摘要: |
| Environmental Assessment of Heavy Metal Contamination in the Northeast of Huize County, Yunnan Province |
| According to the National Multi-Purpose Regional Geochemical Survey (NMPRGS) project, the geochemical survey project of land quality with a scale of 1: 250 000 in the center and northeast of Yunnan province has been completed. Fifty-four items (including pH, major oxides, and elements) were analyzed in each composite surface soil sample per 4 km2 in this project. Based on the 182 surface soil samples collected in the northeast of Huize county in Yunnan province and the Soil Environmental Quality (SEQ) risk control standard for soil contamination of agricultural land in China (GB15618-2018), the environmental quality of the study area was evaluated on 5 heavy metals (Pb, Cd, As, Cr and Hg) using a new single pollution index and integrated pollution index proposed in this paper with qualitative descriptions. For samples with no pollution, screening pollution or controlling pollution, the single pollution index is set to 0, 1 or 10 respectively, and the integrated pollution index is set to the sum of the single pollution index values. The soil in this area is generally acidic, and its pH varies from 4.66 to 8.16. Some contents of Pb and Cd are higher than the environmental pollution control values stipulated in GB15618-2018 for agricultural land. Both Cr and As contents are all lower than the control values although some contents are higher than the screening values of pollution risk. In addition, all contents of Hg were lower than the screening value for agricultural lands. Therefore, it is suggested to control the environmental pollution of Pb and Cd and to monitor the contents of Cr and As in the soil if the area is used for agriculture.Meanwhile, the pollution risk of Hg in the soil could be ignored according to the survey results. To calculate the single and integrated pollution indices proposed in this paper, software named EGAPI-GB15618 was developed non-commercially. |
| HUANG Jia-xin,XU Sheng-chao,GONG Qing-jie,CHEN Zi-wan,HUANG Zhao.2022.Environmental Assessment of Heavy Metal Contamination in the Northeast of Huize County, Yunnan Province[J].Acta Geoscientica Sinica,43(1):93-100. |
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