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| Remediation effects of four halophytes on Cd and Pb compound pollution |
| Received:September 27, 2016 |
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| KeyWord:saline soil;heavy metals contamination;plant extract remediation;Suaeda salsa |
| Author Name | Affiliation | E-mail | | CHEN Ke-han | School of Environment, Jinan University, Guangzhou 510632, China | | | ZHANG Ke | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China | | | LI Qu-sheng | School of Environment, Jinan University, Guangzhou 510632, China
Guangdong Provincial Research Center of Environmental Pollution Control and Remediation Material, Guangzhou 510632, China | liqusheng@21cn.com | | HU Ni | School of Environment, Jinan University, Guangzhou 510632, China | | | XU Zhi-min | School of Environment, Jinan University, Guangzhou 510632, China | | | WEI Jia | School of Environment, Jinan University, Guangzhou 510632, China | |
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| Abstract: |
| Under the different concentrations of Cd, Pb and salinity levels, the sand culture pot experiment was conducted in the greenhouse. The remediation effects on Cd and Pb compound pollution were compared among four halophytes:Melilotus suaveolens Ledeb., Suaeda salsa, Limonium gmelinii and Atripex aucheri Moq. Indicators, such as enrichment coefficient, transfer coefficient, root net absorption capacity, root net translocation capacity, extraction rate, and extraction duration, were investigated. The results showed that the biomass of Suaeda salsa was 13.17 g·pot-1, and Cd content in shoot was 97.04 mg·kg-1. Cd and Pb uptake and translocation ability of Suaeda salsa were significantly higher than those of the other three halophytes. A certain concentration of salt could promote plant growth and absorption of Cd and Pb in four halophytes. The absorption and transport of Cd and Pb were significantly different in four halophytes. For Suaeda salsa, Cd extraction rate was 31.80%, Cd extraction amount was 938.20 μg·pot-1, and the extraction duration was 3.14 years. Suaeda salsa has great potential in remediation of heavy metal contaminated saline soils. |
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