Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China
The influence of cascade dams on the migration of microplastics (MPs) was conducted by analyzing the spatial distribution of MPs in sediments of the Wujiang river basin (Wujiang river basin) in Southwest China. The results showed that the abundance of MPs in Wujiang river basin sediments ranged from...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-07-01
|
| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651322005553 |
| _version_ | 1811337726011637760 |
|---|---|
| author | Kangkang He Jingfu Wang Quan Chen Fengxue Wu Xiaohong Yang Jingan Chen |
| author_facet | Kangkang He Jingfu Wang Quan Chen Fengxue Wu Xiaohong Yang Jingan Chen |
| author_sort | Kangkang He |
| collection | DOAJ |
| description | The influence of cascade dams on the migration of microplastics (MPs) was conducted by analyzing the spatial distribution of MPs in sediments of the Wujiang river basin (Wujiang river basin) in Southwest China. The results showed that the abundance of MPs in Wujiang river basin sediments ranged from 310 to 2620 items/kg dw (mean: 1354 items/kg dw, a high level compared with aquatic sediments worldwide). The main chemical components of these MPs were polypropylene and polyethylene. High abundance of MPs in tributary sediments suggested that tributary inputs contributed to the main stream and reservoirs. Statistical analysis showed that gross domestic product (GDP) and the basin area of cascade reservoirs, rather than hydraulic retention time and reservoir age, were the dominating factors in the distribution of MPs in the Wujiang river basin. The accumulation of MPs in cascade reservoirs implied the interception effect of cascade dams. The rapid development of cascade dam systems and the interception effect of dams should be taken into account when predicting the flux of MPs from rivers to the ocean. Heavy metals found on the surface of the MPs showed the compound pollution of MPs and heavy metals in dammed rivers and cascade reservoirs. Our results deepen the understanding of the migration of MPs in rivers alongside intensive cascade hydropower development. |
| first_indexed | 2024-04-13T17:59:04Z |
| format | Article |
| id | doaj.art-bf7717c96a4e422bb9b6f78bee839919 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-04-13T17:59:04Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-bf7717c96a4e422bb9b6f78bee8399192022-12-22T02:36:19ZengElsevierEcotoxicology and Environmental Safety0147-65132022-07-01240113715Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern ChinaKangkang He0Jingfu Wang1Quan Chen2Fengxue Wu3Xiaohong Yang4Jingan Chen5State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, PR ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Corresponding author at: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, PR ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, PR ChinaState Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR ChinaThe influence of cascade dams on the migration of microplastics (MPs) was conducted by analyzing the spatial distribution of MPs in sediments of the Wujiang river basin (Wujiang river basin) in Southwest China. The results showed that the abundance of MPs in Wujiang river basin sediments ranged from 310 to 2620 items/kg dw (mean: 1354 items/kg dw, a high level compared with aquatic sediments worldwide). The main chemical components of these MPs were polypropylene and polyethylene. High abundance of MPs in tributary sediments suggested that tributary inputs contributed to the main stream and reservoirs. Statistical analysis showed that gross domestic product (GDP) and the basin area of cascade reservoirs, rather than hydraulic retention time and reservoir age, were the dominating factors in the distribution of MPs in the Wujiang river basin. The accumulation of MPs in cascade reservoirs implied the interception effect of cascade dams. The rapid development of cascade dam systems and the interception effect of dams should be taken into account when predicting the flux of MPs from rivers to the ocean. Heavy metals found on the surface of the MPs showed the compound pollution of MPs and heavy metals in dammed rivers and cascade reservoirs. Our results deepen the understanding of the migration of MPs in rivers alongside intensive cascade hydropower development.http://www.sciencedirect.com/science/article/pii/S0147651322005553MicroplasticsCascade damsReservoirsHeavy metalsWujiang river basin |
| spellingShingle | Kangkang He Jingfu Wang Quan Chen Fengxue Wu Xiaohong Yang Jingan Chen Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China Ecotoxicology and Environmental Safety Microplastics Cascade dams Reservoirs Heavy metals Wujiang river basin |
| title | Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China |
| title_full | Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China |
| title_fullStr | Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China |
| title_full_unstemmed | Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China |
| title_short | Effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of Wujiang river basin, Southwestern China |
| title_sort | effects of cascade dams on the occurrence and distribution of microplastics in surface sediments of wujiang river basin southwestern china |
| topic | Microplastics Cascade dams Reservoirs Heavy metals Wujiang river basin |
| url | http://www.sciencedirect.com/science/article/pii/S0147651322005553 |
| work_keys_str_mv | AT kangkanghe effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina AT jingfuwang effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina AT quanchen effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina AT fengxuewu effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina AT xiaohongyang effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina AT jinganchen effectsofcascadedamsontheoccurrenceanddistributionofmicroplasticsinsurfacesedimentsofwujiangriverbasinsouthwesternchina |