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Study on Performance of Inorganic Modified Bentonite as Impermeable Layer

WANG Tie-jun^1,2, ZHAO Yong-sheng¹, QU Zhi-hui¹, ZHOU Rui¹,LIU Ying-ying¹, WU Qian-fang¹, LV Cong¹, HOU Ge¹

1.College of Environment and Resources，Jilin University，Changchun 130026，China;2.Changchun Monitoring Station, State City Water Supply Quality Monitoring Network，Changchun 130022，China

Received:2007-12-04 Revised:1900-01-01 Online:2008-05-26 Published:2008-05-26
Contact: WANG Tie-jun

Abstract

Abstract: According to the laboratory experiments, 2 mol/L magnesium chloride, 0.5 mol/L sulfuric acid and 450℃ roasting were determined as the optimum conditions for the natural Na-bentonite by salt modification, acidification and roasting. The availability and feasibility of the 3 inorganic modified-layers to main contaminants removal in the leachate and leachate leaking control were investigated. The experimental results indicated that the adsorptive capacities and the capacities of the 3 inorganic modified bentonites were enhanced; the permeability of the layers was less than 1×10^-7 cm/s, therefore the layers could be used as the “reactive layer”. In the same leaked amount sample, the best removal efficiency of the main pollutants was the roasted bentonite, and next was the acidified bentonite, and the salty modified bentonite was the lowest one.

Key words: inorganic modified, bentonite, magnesium chloride, sulfuric, roasting

CLC Number:

X701.1

WANG Tie-jun, ZHAO Yong-sheng, QU Zhi-hui, ZHOU Rui,LIU Ying-ying, WU Qian-fang, LV Cong, HOU Ge. Study on Performance of Inorganic Modified Bentonite as Impermeable Layer[J].J4, 2008, 38(3): 463-0467.

References

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