Adsorption kinetics of Industrial Colors from Wastewater Using Surfactant-Modified Clinoptilolite

One of the applications of Clinoptilolite zeolite is the adsorption of impurities and paint residues from paint factories. In order to investigate this characteristic of clinoptilolite, the present study is accomplished on clinoptilolites of Shahindezh, West Azerbaijan province. For this purpose, the clinoptilolite sample was first crushed with jaw crusher and then grounded using ball mill and then classified into three size fractions of -500+250, -250+106 and -106. Then, in order to remove the water present in the mineral structure, one sample from each fraction was heated to 160 ° C for 6 hours. After drying, each fraction was analyzed for the amount of adsorption of waste dyes in the paint. In order to investigate the effect of modification on adsorption rate, one sample was modified with anionic surfactants. According to experiment results, modified zeolite has the ability to absorb many cationic colors such as methylene blue and green malachite with a very high adsorption rate. Non- modified zeolite was able to adsorb anionic color such as methyl orange and alizarin red with a lesser adsorption rate. Besides, the effect of pH an adsorption value was investigated. The results showed that pH value increases with an increase in pH value.