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| Effects of combined Cu-Pb-Zn contaminants on Sn tolerance and accumulation in perennial flowers |
| Received:November 24, 2020 |
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| KeyWord:heavy metals;perennial flowers;Sn accumulation;contaminated soil;combined pollution |
| Author Name | Affiliation | E-mail | | LIU Yu-xia | Beijing Key Laboratory of Oil and Gas Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum(Beijing), Beijing 102249, China | | | XU Wei-li | Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | | | HUANG Pan-pan | Dongying Municipal Bureau of Marine Development and Fisheries, Dongying 257091, China | | | CHENG Si-wen | School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China | | | ZHANG Qiang-bin | Beijing Key Laboratory of Oil and Gas Pollution Control, College of Chemical Engineering and Environment, China University of Petroleum(Beijing), Beijing 102249, China | | | ZHOU Qi-xing | Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | zhouqx@nankai.edu.cn |
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| Abstract: |
| In this study, Hosta plantaginea Aschers and Coreopsis basalis, two perennial flowers, were chosen to explore the ecological interactions and effects of combined heavy metal contaminants in a Sn mining field. Soil-culture experiments were performed to test the Sn tolerance and accumulative characteristics of the chosen perennial flowers. Results showed that the growth of the two plants was inhibited （presented as a reduction in biomass）with increasing Sn concentration in soil contaminated only with Sn. The toxicity of Sn contamination was relieved to some extent when combined with Cu-Pb-Zn contamination. The addition of combined Cu-Pb-Zn contaminants increased the amount of bioavailable Sn in the soil, which led to increased Sn accumulation in the two plants studied. Meanwhile, the ability of Sn to translocate to the two plants was also enhanced. Generally, combined Cu-Pb-Zn contaminants accumulated in the plants following the order of Zn>Pb>Cu. The ability of the combined heavy metal contaminants to accumulate and translocate showed a positive correlation with Sn concentration in the soil. The hypertrophic and profuse root system of Coreopsis basalis plants allowed them to have broad contact with the soil, and thus, accumulate a relatively greater amount of heavy metals than Hosta plantaginea Aschers. The results of this study suggest that combined heavy metal contaminants affect the ability of Sn to accumulate and translocate in perennial flowers, and vice versa. |
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