• 其他研究论文 •

皖江经济带土壤Cd空间分布特征与生态风险评价

1. 1. 安庆师范大学资源环境学院,皖江流域水环境保护与污染控制安徽省教育厅重点实验室,安庆 246133
2. 安徽省地质调查院,合肥 230001
• 收稿日期:2020-08-16 修回日期:2020-11-25 出版日期:2021-12-28 发布日期:2022-02-28
• 通讯作者: 赵宽（1986- ）,男,安徽池州人,博士,副教授,研究方向为环境生态毒理学。E-mail: zhaokuan@aqnu.edu.cn
• 作者简介:周葆华（1963- ）,女,安徽安庆人,教授,研究方向为生态环境调查与风险评估。E-mail: 1979748551@qq.com
• 基金资助:
安徽省科技重大专项项目(17030701057);安徽省自然科学基金项目(1908085QD149);安徽省高等学校自然科学研究重点项目(KJ2018A0374)

Spatial distribution characteristic of Cd in soils and its ecological risk assessment in the economic belt of Yangtze River in Anhui

ZHOU Bao-hua1(), HU Rui-xin1, ZHAO Kuan1(), WAN Xin1, WANG Yu1, LIANG Yu-hui2, TANG Jin-lai2

1. 1. School of Resource and Environment, Key Laboratory of Aqueous Environment Protection and Pollution Control of Yangtze River in Anhui of Anhui Provincial Education Department, Anqing Normal University, Anqing 246133, Anhui, China
2. Anhui Institute of Geological Survey, Hefei 230001, China
• Received:2020-08-16 Revised:2020-11-25 Online:2021-12-28 Published:2022-02-28

Abstract:

The numbers of 35, 34 and 106 of soil samples in the economic belt of the Yangtze River in Anhui were collected at A, B and C sampling sites by the grid points of 2.5 km× 2.5 km, respectively, the Cd content was measured by ICP-AES, and single factor pollution index, geoaccumulation index and potential ecological risk index were selected to assess the environmental risk of Cd at the three sites. The results showed that: (1) The average values of Cd content were 0.40, 0.66 and 0.84 mg?kg -1 in soils of A, B and C sites, respectively, which were higher than the background values of Cd content in the soils of Yangtze-Huaihe river basin of Anhui. (2) The pH values of soils at the three sites were 5.06-7.58, which was between acidic and weakly alkaline. The number of samples with pH less than 7.0 was 167, accounting for 95.43% of the total number. (3) The low pollution area is distributed as a ribbon in space, while the high pollution area is distributed as an island in space of the three sites; different soil types have different pollution characteristics of Cd. (4) The assessment results were identical and presented as follows: site C > site B > site A by the single factor pollution index, the geoaccumulation index and the potential ecological risk index. In conclusion, we should focus on the safe utilization of soils and give targeted guidance to the study regions.