https://scholars.lib.ntu.edu.tw/handle/123456789/425135
標題: | Distribution of mercury and methylmercury in surface water and surface sediment of river, irrigation canal, reservoir, and wetland in Taiwan | 作者: | Wang, Ying Lin Fang, Meng Der Chien, Ling Chu Lin, Chu Ching HSING-CHENG HSI |
關鍵字: | Irrigation canal | Mercury | Methylmercury | Reservoir | River | Surface sediment | Wetland;Irrigation canal; Mercury; Methylmercury; Reservoir; River; Surface sediment; Wetland | 公開日期: | 1-六月-2019 | 出版社: | SPRINGER HEIDELBERG | 卷: | 26 | 期: | 17 | 起(迄)頁: | 17762 | 來源出版物: | Environmental Science and Pollution Research | 摘要: | © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. In Taiwan, because of the co-use of some irrigation and drainage canals, a portion of industrial wastewater was directly discharged into irrigation canals or even flowed into rivers or wetlands, causing the heavy metal pollution in waters and sediments. Mercury (Hg) contamination in rivers, irrigation canals, and wetlands has been found in Taiwan, but a thorough investigation on the distribution of Hg and methylmercury (MeHg) in these waters and sediments, which may be present in a greater level with elevating total Hg (THg) concentration and markedly impact human health, is still lacking. In this study, surface waters and surface sediments were sampled from five major rivers, two irrigation canals, two reservoirs, and one wetland in Taiwan, and their THg and MeHg concentrations were quantified. Additionally, statistical analysis was carried out to understand the relationship between sediment properties and MeHg levels. The results showed that irrigation canal sediments were relatively more polluted by Hg and the THg concentrations of some sampling points exceeded the upper limit (i.e., 0.87 mg kg−1) of sediment quality index (SQI) for THg promulgated by Taiwan Environmental Protection Administration, which may be attributed to the co-use of irrigation and drainage canals. Furthermore, the MeHg concentration in irrigation canal sediments was the highest; rivers came in second followed by wetlands. In addition, the Siangshan Wetland was analyzed to have the greatest THg and MeHg concentrations in its surface water. Linear regression analysis also indicated that total organic carbon and clay content substantially affected the MeHg production in sediments. In Taiwan, because of the co-use of some irrigation and drainage canals, a portion of industrial wastewater was directly discharged into irrigation canals or even flowed into rivers or wetlands, causing the heavy metal pollution in waters and sediments. Mercury (Hg) contamination in rivers, irrigation canals, and wetlands has been found in Taiwan, but a thorough investigation on the distribution of Hg and methylmercury (MeHg) in these waters and sediments, which may be present in a greater level with elevating total Hg (THg) concentration and markedly impact human health, is still lacking. In this study, surface waters and surface sediments were sampled from five major rivers, two irrigation canals, two reservoirs, and one wetland in Taiwan, and their THg and MeHg concentrations were quantified. Additionally, statistical analysis was carried out to understand the relationship between sediment properties and MeHg levels. The results showed that irrigation canal sediments were relatively more polluted by Hg and the THg concentrations of some sampling points exceeded the upper limit (i.e., 0.87 mg kg−1) of sediment quality index (SQI) for THg promulgated by Taiwan Environmental Protection Administration, which may be attributed to the co-use of irrigation and drainage canals. Furthermore, the MeHg concentration in irrigation canal sediments was the highest; rivers came in second followed by wetlands. In addition, the Siangshan Wetland was analyzed to have the greatest THg and MeHg concentrations in its surface water. Linear regression analysis also indicated that total organic carbon and clay content substantially affected the MeHg production in sediments. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425135 | ISSN: | 09441344 | DOI: | https://api.elsevier.com/content/abstract/scopus_id/85064930273 10.1007/s11356-019-05176-0 |
SDG/關鍵字: | fluvial deposit; irrigation; mercury (element); methylmercury; reservoir; spatial distribution; surface water; wastewater treatment; wetland; Taiwan; mercury; methylmercury derivative; analysis; environmental monitoring; river; sediment; Taiwan; water pollutant; wetland; Environmental Monitoring; Geologic Sediments; Mercury; Methylmercury Compounds; Rivers; Taiwan; Water Pollutants, Chemical; Wetlands |
顯示於: | 環境工程學研究所 |
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