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采用白酒糟吸附剂对模拟印染废水中刚果红(CR)和孔雀石绿(MG)进行生物吸附处理。在染料初始质量浓度100mg/L、吸附时间80min的条件下,当刚果红废水初始pH=7.0,白酒糟投加量为2g/L时,白酒糟对刚果红的吸附率为96.94%;当孔雀石绿废水初始pH=9.0,白酒糟投加量4g/L时,白酒糟对孔雀石绿的吸附率为95.12%。动力学研究表明,白酒糟对两种染料的吸附过程均符合准二阶动力学方程,表明该吸附过程以化学吸附为主。使用Freundlich等温吸附方程可较好的拟合白酒糟对两种染料的吸附,说明该吸附是以多分子层吸附为主。
White distiller’s grains sorbent was used to conduct biosorption on Congo red (CR) and malachite green (MG) in simulated printing and dyeing wastewater. Under the conditions of initial dye concentration of 100mg / L and adsorption time of 80min, when the initial pH value of Congo redwaste water was 7.0 and the dosage of white spirit was 2g / L, the adsorption rate of white wine grains to congo red was 96.94% Stone green waste water initial pH = 9.0, white wine dregs dosage 4g / L, white lees on malachite green adsorption rate was 95.12%. Kinetic studies have shown that the white wine grains on both dyes adsorption process are in line with quasi-second order kinetics equation, indicating that the adsorption process dominated by chemical adsorption. Freundlich isotherm equation can be used to better fit the adsorption of white wine grains on two dyes, indicating that the adsorption is dominated by multi-layer adsorption.