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《Journal of Anhui Agricultural Sciences》 2012-04
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Study on Treatment of Orange II Dye by Adsorption and Catalysis of Organic-Inorganic Composite Bentonite

LUO Yang-chun et al(Zhejiang Huanneng Environmental Technology Co.,Ltd.,Hangzhou,Zhejiang 310024)  
[Objective] The research aimed to study treatment of orange II dye by adsorption and catalysis of organic-inorganic composite bentonite.[Method] The hydroxyl-Fe and surface active agent were used to simultaneously modify bentonite,and the organic-inorganic composite bentonite was made.The orange II(negative-ion dye) was as representative of dye wastewater.The influences of time and pH on adsorption and catalysis processes of organic-inorganic composite bentonite were studied.[Result] The adsorption effect of organic-inorganic composite bentonite on orange II dye was obvious.The maximum adsorption amount was 76.1 mg/g.The influence of time on adsorption effect was obvious.When the adsorption time was 140 min,the removal ratio reached 96.22% and was the maximum.The adsorption process corresponded with quasi-secondary dynamic equation.The adsorption effect was also affected by wastewater pH.Under different pH conditions,the removal ratio all could reach above 85.00%.When pH was 4,the removal ratio reached 97.57% and was the maximum.In addition,under the condition of H2O2 existence,the organic-inorganic composite bentonite could catalyze decomposing adsorbed pollutant,and the degradation rate of organic matter reached 87.13%.It avoided secondary pollution,and could repeatedly use bentonite.When pH was 4,the degradation effect was the best,but the degradation time was long.[Conclusion] The research provided new thought for treatment of dye wastewater.
【CateGory Index】: X791
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