Abstract

The aim of this study is to synthesize a superior adsorbent by combining positive properties of alginate and natural zeolite (clinoptilolite). Electrostatic interactions between the negatively charged carboxyl groups in alginate, porous sites in clinoptilolite and positively charged cationic dye in wastewater make alginate and clinoptilolite superior for dye removal. A model wastewater was prepared with varying concentrations of methylene blue (MB). Effects of MB concentration, adsorption time, pH, and adsorbent concentration on adsorption performance were evaluated. Composite adsorbents were also characterized using Fourier transform infrared spectroscopy. While 97.0% of removal was achieved using 5 g/L adsorbent, 98.8% of removal was obtained using 15 g/L adsorbent dosage. When the dye concentrations were gradually decreased from 5 mg/L to 2 mg/L, dye removal of 96.9%, 97.7%, 97.9% and 98.4% were observed at the end of 180 minutes.

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