Adsorption Properties of Chitosan Modify Diatomite for Anionic Dye Reactive Red 120

Abstract

Water pollution has become a problem we need to be addressed. A large number of printing and dyeing wastewater was discharged into the environment, polluting water resources. In this study, sodium dodecyl sulfate and chitosan were used as modifiers to modify the surface of diatomite to prepare chitosan modified diatomite, which was used to treat printing and dyeing wastewater of containing reactive red 120. The physical and chemical properties of diatomite modified by sodium dodecyl sulfate and chitosan were studied and characterized by a specific surface area analyzer and FT-IR. The effects of the dosage of chitosan modified diatomite, adsorption time, pH and the concentration of printing and dyeing wastewater on the adsorption were studied. The results showed that sodium dodecyl sulfate and chitosan could modify diatomite effectively. Chitosan modified diatomite could effectively improve the treatment effect of printing and dyeing wastewater compared with diatomite. When the dosage of chitosan modified diatomite was 2g/L, the adsorption time was 110 min, and the pH value was between 5 and 6, the removal rate of reactive red 120 was more than 99%.