Preparation of NWF-g-DMC@Al2O3 adsorbent by preradiation grafting-embedding and its application for removal of chlorite

Abstract

Chlorite and other disinfection byproducts have been listed as carcinogens by the International Center for Research on Cancer. The effective treatment of chlorite is imperative for the drinking water purification process. A series of Non-woven fabric - ethyl methacrylate trimethyl ammonium chloride - nano aluminum oxide (NWF-g-DMC@Al2O3) adsorbent materials were synthesized using the pre-radiation grafting–embedding reaction. In this study, water was used as the solvent to systematically discuss the effects of adsorption dose, monomer concentration, and other factors on the weight gain rate and subsequently evaluate the effects of different weight gain rates, embedding rates, and solution pH on the adsorption rate to obtain a complete static adsorption equilibrium curve. Infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and X-ray diffraction analysis were used to characterize the structure and adsorption properties of the synthesized samples. The results showed that the weight gain rate was the highest at a monomer concentration of 40 %. The adsorption rate was the highest at an adsorption dose of 100 kGy, embedding embedding amount 4 %, pH of 2, and initial concentration of 10 mg/L. The chlorite removal rate of the NWF-g-DMC@Al2O3 adsorbent was 89%. The new adsorbent is expected to be extensively used in the purification of drinking and industrial water.

Keywords

• non-woven fabric
• nano-al2o3
• preradiation grafting-embedding
• adsorption
• chlorite