[目的]研究有机-无机复合膨润土吸附-催化处理金橙Ⅱ染料.[方法]利用羟基铁和表面活性剂同时改性膨润土,制得有机-无机复合膨润土.以阴离子染料金橙Ⅱ为染料废水的代表,研究了时间、pH等因素对有机-无机复合膨润土吸附和催化过程的影响.[结果]有机-无机复合膨润土吸附剂对金橙Ⅱ染料的吸附效果明显,最大吸附量为76.1 mg/g.吸附剂的吸附效果受吸附时间影响较为明显.当吸附时间在140 min左右时,去除率最高,可达96.22％.吸附过程符合准二级动力学方程.吸附效果也受到废水自身pH的影响.在不同pH条件下,去除率均能达到85.00％以上.当pH在4左右时,得到最大去除率97.57％.此外,有机-无机复合膨润土在有H2O2存在下,可以催化降解所吸附的污染物,有机物降解率达到87.13％,避免了二次污染,并可重复使用膨润土.当pH在4左右时,降解效果达到最佳,但降解时间较长.[结论]该研究为染料废水处理提供了新思路.%[Objective] The research aimed to study treatment of orange II dye by adsorption and catalysis of organic-inorganic composite ben-tonite. [ 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 obvi-ous 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.
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