Study on Preparation and Performance of Polysilicic Aluminum
This article uses silicate and aluminum chloride as raw materials to produce polyaluminum silicate(PASC)under certain conditions.Explore the optimal conditions for treating simulated wastewater with polymeric aluminum silicate,and compare the treatment of printing and dyeing wastewater with polymeric iron chloride(PAFC)and polymeric aluminum chloride(PAC),as well as the actual wastewater treatment effect.Research has shown that polyaluminum silicate has the best treatment effect on simulated wastewater under the conditions of pH value 8,dosage of 150 mg/L,stirring speed of 90 r/min,and stirring time of 15 min;When treating printing and dyeing wastewater,PASC has a wider pH range than the other two flocculants,and its decolorization effect is good;PASC can achieve a removal rate of over 90%for turbidity and chromaticity in all four types of wastewater,while the removal rate of CODCr is relatively low.PASC is more suitable for the treatment of papermaking wastewater.
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