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Membrane Water Treatment Volume 6, Number 5, September 2015 , pages 393-409 DOI: https://doi.org/10.12989/mwt.2015.6.5.393 |
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Membrane behavior of bentonite-amended compacted clay towards Zn(II) and Pb(II) |
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Qiang Tang, Takeshi Katsumi, Toru Inui and Zhenze Li
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| Abstract | ||
| Zinc and lead pollution are public environmental issues that have attracted lots of attention for a long time. Landfill leachate contains heavy metals, such as Zn(II) and Pb(II), which are usually related to thepollution of groundwater, especially in developing countries. Bentonite has been proven to be effective in enhancing the membrane property of clay, by which landfill liners can have better barrier performance towards the migration of contaminants. In this study, 5% sodium bentonite amended with locally available Fukakusa clay was utilized to evaluate the membrane behavior towards the heavy metals zinc and lead. The chemico-osmotic efficiency coefficient, ω, was obtained through Zn(II) and Pb(II) solutions with different concentrations of 0.5, 1, 5, 10, and 50 mM. According to the results, | ||
| Key Words | ||
| Bentonite amended compacted clay; Zn(II); Pb(II); membrane behavior; adsorption; mechanism | ||
| Address | ||
| (1) Qiang Tang: School of Urban Rail Transportation, Soochow University, China; (2) Takeshi Katsumi, Toru Inui: Graduate School of Global Environmental Studies, Kyoto University, Japan; (3) Zhenze Li: Department of Civil Engineering, University of Ottawa, Canada. | ||