A novel floating adsorbents system of acid orange 7 removal: Polymer grafting effect

Floating adsorbents are materials that can adsorb dissolved pollutants and float on the water surface stably, which enables rapid and efficient solid-liquid separation. In this study, by grafting silane coupling agent A-1100 and methacryloyloxyethyltrimethyl ammonium chloride on the surface of hollow glass microspheres, adsorbents with non-polymer graft and polymer graft were prepared which have the ability to adsorb anionic dye and can be easily separated by floating mechanism. The SEM, XPS, S-BET, TG, XRD characterization results confirmed the successful grafting of silane coupling agent A-1100 and methacryloyloxyethyltrimethyl ammonium chloride. Adsorption experiments on acid orange 7 show that non-polymer grafting adsorbents have better adsorption performance and the adsorption capacity reaches 217.39 mg g(-1), while polymer grafting adsorbents have stronger environmental adaptability.