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Zhang K, Han Y, Li K, Guo Z, Wang Q, Cui X, Yang F, Zhang Z. Fractionation analysis and risk assessment of potential toxic elements in reservoir sediments in central China. Environ Sci Pollut Res Int 2022; 29:81864-81874. [PMID: 35737267 DOI: 10.1007/s11356-022-21464-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 06/10/2022] [Indexed: 06/15/2023]
Abstract
The pollution of potential toxic elements (PTEs) in the environment is a persistent issue and draws public attention constantly. However, there is no study comprehensively assessing the PTE pollution of water supply reservoirs in central China. This study determined the total contents and fractions of seven PTEs in 10 water supply reservoirs of central China, and evaluated PTE pollution risks by adopting various models. The results indicated that PTE pollution in water supply reservoirs was lower comparing that in estuary or river sediments, and Mn (manganese) was the predominant PTE in central China reservoirs. Fractionation analysis revealed that for B1 fraction (exchangeable/acid-soluble fraction) of Mn, Zn (zinc) and B2 fraction (reducible fraction) of Pb (lead) was high, while the effective state portion of Cr (chromium) was small. The monomial potential ecological risk indices and Igeo values were low among most samples, indicating overall modest PTE pollution. However, the results of the individual contamination factor (ICF) suggested that Pb might lead to potential health risks to human beings.
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Affiliation(s)
- Kai Zhang
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
| | - Ya Han
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
| | - Kuangjia Li
- Development Research Center, Ministry of Water Resources of People's Republic of China, Beijing, 100032, China.
| | - Ziwei Guo
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
| | - Qian Wang
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
| | - Xiangchao Cui
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
| | - Fengxia Yang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
| | - Zhongshuai Zhang
- School of Geographic Sciences, Xinyang Normal University, Xinyang, 464000, China
- Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, Xinyang Normal University, Xinyang, 464000, China
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Nan G, Meng X, Song N, Liu Z, Liu Y, Yang G. Fractionation analysis and health risk assessment of heavy metals in six traditional Chinese medicines. Environ Sci Pollut Res Int 2020; 27:10308-10316. [PMID: 31933094 DOI: 10.1007/s11356-019-07558-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
Traditional Chinese medicines (TCMs) are widely used to treat various diseases in China and some countries, and TCM products are becoming increasingly available and popular worldwide. But TCMs are facing the challenge of heavy metal pollution. In this work, we examined the total contents and fractionations of Pb, Cd, Hg, and Cu in six TCMs (Angelicae Sinensis Radix (ASR), Chuanxiong Rhizoma (CR), Polygonati Rhizoma (PR), Astragali Radix (AR), Carthami Flos (CF), and Paeoniae Radix Rubra (PRR)) and evaluated the health risk of four heavy metals in these TCMs. The results showed that Cd, Pb, and Cu contents were considerably high and the amount of Cd in six TCMs, Pb in CR, ASR, AR, and CF, and Hg in ASR, PR, and PRR exceeded the limit values. The predominant fractions of Pb, Cd, and Cu were exchangeable and carbonate fractions in six TCMs; Hg mainly existed in organic and residual fractions. The average daily intake dose (ADD) and target hazard quotient (THQ) of Pb based on total content and total THQ of four heavy metals based on bioaccessible fractions in AR and PRR exceeded the safety guideline. These results indicated that the potential health risk could occur by taking these TCMs.
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Affiliation(s)
- Guanjun Nan
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Xianxin Meng
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Ning Song
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Zhengzheng Liu
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Yu Liu
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China
| | - Guangde Yang
- School of Pharmacy, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, China.
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