Modified natural zeolite as adsorbent for remazol black b dye: Kinetics and equilibrium aspects

Effective and inexpensive adsorbents are needed for wastewater treatment. This study describes the use of Cu/natural zeolite as an adsorbent in adsorption remazol black b dye terms kinetics isotherms. Cu/zeolite was obtained by activating natural using HCl NH4Cl solution then impregnated Cu(NO3)2.3H2O solution. Characterization XRD, SEM-EDX tools. Adsorption with a batch system carried out at various contact times 5, 15, 20, 60, 300 minutes well variations concentration 10, 25, 30 ppm. UV-Vis spectrophotometer used to measure The data were tested on kinetic equations pseudo-first-order, pseudo-second-order, intraparticle diffusion. isotherms analyzed Langmuir, Freundlich, Temkin, Harkin-Jura, Jovanovic, Halsley, Elovich results showed that based SEM images, after activation form smaller more organized granules than activation. XRD analysis had structure 42.8% mordenite, 39.8% clinoptilolite, 17% quartz. EDX mass percentage Cu 1.58%. Equilibrium time reached 300th minute capacity 0.4299 mg/g. largest initial 25 ppm value 0.0691 mg/gram. followed pseudo-second-order Langmuir isotherm pattern.