Decolorization of acid red dyeing wastewater by Modified Bentonite-Chitosan Adsorbent

This study introduces the best prepared methods of Modified Bentonite -Chitosan Adsorbent, and analysises the best decolorizing test conditions of printing and dyeing wastewater treatment by it. The results show that, modifying bentonite by 1mol/L H2SO4 is desirable, the best solid-liquid ratio of bentonite and chitosan is 0.833g/ml, the best conditions of the oscillator shake speed is 200r/min, while the best temperature is 45°C,pH is 6, and the amount of added products is 2g/100ml in printing and dyeing wastewater treatment.