Removal of rhodamine b using 4-hydroxy-3-methoxyphenylcalix[4]resorcinarene

Abstract

Rhodamine B is one of the dyes that is widely used in the textile industry. However, the rhodamine B waste produced is dangerous for the environment. So, it must be treated propely. Adsorption is a simple method that can be used in waste water treatmen. In the present study, the adsorbent used is 4-hydroxy-3-methoxyphenylcalix[4]resorcinarene (CHMFKR) which is synthesis from vanillin and resorcinol. The yield of product was synthesis is 85.707%. The removal of rhodamine B by calix[4]resorcinarene was investigated in the present study. Adsorption studies were performed by batch experiments. The effect of contact time, pH, initial dye concentration was explored. The optimum conditions at contac time 75 minutes and pH 7. The adsorption kinetics of rhodamine B using calix[4]resorcinarene followed second pseudo order. The isotherm study showed that adsorption rhodamine B using 4-hydroxy-3-methoxycalix[4]resorcinarene followed Freundlich isotherm with adsorption energy of-33598.02 J/mol, kf value 1.29 x 10-6 L/mol and qmaks 6.157 mg/g.