Self-cleaning liner for halogenated hydrocarbon control in landfill leachate

Scientific Reports
Shichong He, Lizhong Zhu

Abstract

Sorptive landfill liners can prevent the migration of the leachate pollutants. However, their sorption ability will decrease over time. A method should be developed to maintain the sorption ability of landfill liners. In this study, we combined cetyltrimethylammonium bromide-bentonite (CTMAB-bentonite) and zero-valent iron (ZVI) to develop a self-cleaning liner that can retain its sorption ability for a long period. Batch experiments and calculation simulations were employed to analyse the sorption ability of this liner material and the ecological risk of halogenated hydrocarbons. The results showed that CTMAB-bentonite could sorb halogenated hydrocarbons well, with saturated sorption capacities (Q m) of 10.2, 14.5, 6.69, 18.5, 29.4, and 49.7 mg·g-1 for dichloroethane (DCA), trichloroethane (TCA), dichloroethene (DCE), trichloroethylene (TCE), tetrachloroethylene (PCE), and 1,3- dichloropropene (1,3-DCP), respectively. Using the mixture of 0.5 g iron and 0.5 g CTMAB-bentonite could dramatically increase the removal efficiency of DCE, TCE, and PCE. The reaction with ZVI did not change the structure of CTMAB-bentonite and its sorption ability remained consistent. Calculation results suggested that the self-cleaning landfill liner...Continue Reading

References

Aug 3, 2002·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Evangelos A Voudrias
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May 17, 2007·Environmental Geochemistry and Health·Chul-Hwan MoonSang-Il Choi
Apr 5, 2008·Journal of Colloid and Interface Science·Runliang Zhu, Lizhong Zhu
Jun 3, 2008·Journal of Hazardous Materials·Xiangyu WangHuiling Liu
Feb 24, 2009·Journal of Hazardous Materials·N Gamze Turan, Osman Nuri Ergun
Mar 31, 2009·Journal of Hazardous Materials·C Noubactep
Sep 29, 2009·Journal of Hazardous Materials·Wei Wang, Lizhong Zhu
Jul 9, 2010·Journal of Contaminant Hydrology·Michael A MalusisEmily R Daniels

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