The Transport of Cr(Ⅵ)through Landfill Liners at Different Temperature and pH
The effect of temperature and pH on the isotherm parameters of Cr(Ⅵ) adsorption ontolandfill liner containing granular activated carbon(GAC),or bentonite activated by acid wasInvestigated. The results show the values of measured isotherm parameters(qm,b)for all soils increasedlinearly with an increase of temperature. The values of measured qm decreased significantly with anIncrease of acidic pH,but as pH lncreased sequentially,the trend became slow relatively;The values ofmeasured b decrease linearly with increasing of pH．GAC and bentonite activated by hydrochloric acidare two potential materials for use as adsorptive amendments for trapping heavy metals in landfill liners．One-dimensional transport simulations for Cr(Ⅵ)were performed to evaluate the effect of granularactivated carbon(GAC)and activated bentonite on landfill liners. The results of the simulations indicatethat landfill liners containing GAC,or activated bentonite,significantly retard the transport of C,(Ⅵ)relative to a conventional clay lincr．Without considering effect of temperature and pH. The results of theslmulatIons would estimate unreasonably the transport of pollutants．
adsorptire amendments isotherm parameters pollutant transport landfillliners
LUAN Maotian LU Haijun ZHANG Jinli
Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, 116085, China
国际会议
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
武汉
英文
327-332
2009-04-26（万方平台首次上网日期，不代表论文的发表时间）