The Perlite-calcium Alginate-activated Carbon Composite as an Efficient Adsorbent for the Removal of Dyes from Aqueous Solutions

To remove dyes from wastewater, the perlite-calcium alginate-activated carbon (pca) composite was prepared by a simple method. this composite was characterized by ftir, xrd, sem and bet techniques. a high capacity of pca was observed for the adsorption of some dyes such as methylene blue (mb) and methyl orange (mo) from aqueous solutions 1111 and 909 mg g^-1. the best results were achieved at phs 3 and 8, dyes initial doses 8 and 10 ppm, adsorbent doses 0.008 and 0.01, time 60 min and temperature 15-20 °c for mo and mb. the adsorption of mb and mo on the as-prepared pca was matched by pseudo-second order model and corresponded to the langmuir isotherm. under optimum adsorption conditions, the yield of adsorption was obtained for mb and mo. results indicated that pca can be a good candidate for adsorption of dyes. the proposed green chemistry-based preparation method is simple, economical, and more reusable compared to the individual application of primary materials.