Removal of BTEX Using Adsorptive Biological Reactive Barrier

Kang Ping Cui; Ben Shan Sun

doi:10.4028/www.scientific.net/AMR.1092-1093.897

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1092-1093Removal of BTEX Using Adsorptive Biological...

Removal of BTEX Using Adsorptive Biological Reactive Barrier

Abstract:

Adsorptive biological reactive barrier comprising medium sand-bentonite-microorganism for removing simulated groundwater BTEX (benzene, toluene, ethyl benzene, xylene) of different concentrations has been investigated with the variance of filling media ratio, and the dependence of BTEX removal efficiency in groundwater on electron acceptor was also studied through adding nitrate. The results show that the optimum volume ratio of bentonite-medium sand is 20:80, with a permeable reactive barrier permeability coefficient of 2.01 × 10^-5 m/s and effective porosity of 16.71%. The addition of nitrate to biological reactive barrier stabilized BTEX removals under different concentrations, comparatively, while the control group without nitrate exhibited volatile BTEX removal efficiency. Under conditions of influent concentrations of 6, 8 and 10 mg/L, the BETX removal rates of biological reactive barrier with/without the addition of nitrate and the control group are about 94%/91%, 96%/90%, and 97%/87%, respectively. The adsorptive biological reactive barrier shows significant performance on BTEX removal, especially with the aid of nitrate additive.

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Periodical:

Advanced Materials Research (Volumes 1092-1093)

Pages:

897-902

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1092-1093.897

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Online since:

March 2015

Authors:

Kang Ping Cui*, Ben Shan Sun

Keywords:

Bentonite, BTEX, Electron Acceptor, Permeable Reactive Barrier

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