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| Cadmium distribution and accumulation in surface-flow constructed wetland system with planted Typha Angustifolia L. |
| Received:April 01, 2016 |
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| KeyWord:constructed wetland;cadmium(Cd);irrigation water;typha;distribution;accumulation |
| Author Name | Affiliation | E-mail | | YU Li | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | XU Meng | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | YE Chang-cheng | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | CHEN Zhe | School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China | | | PENG Liang | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | SUN Jian | School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China | | | LIU Xiao-li | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | | | TIE Bo-qing | College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China | tiebq@qq.com |
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| Abstract: |
| Distribution and accumulation patterns of cadmium (Cd) were investigated in a surface flow artificial wetland system(SFAW) with Typha Angustifolia L. designed for purification of wastewater for field irrigation. Results showed that 68.88% of Cd were removed by the SFAW with an average retention time of 1.62 days. The Cd content in underground and aboveground parts of Typha were respectively 127.39 mg·kg-1 and 14.65 mg·kg-1, with enrichment coefficient and transfer coefficient of 6.58~41.26 and 0.037~0.107, respectively, indicating that Typha has a high capacity for purifying irrigation water. The Cd content within the plant and in the sediment decreased gradually with the distance of water flow, but increased with time. The percentages of various forms of Cd in sediment decreased in order:B2 > B1 > B3 > B4, implying a high potential bioavailability of Cd. |
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