Facile synthesis of hierarchical structure of NaY zeolite using silica from cogon grass for acid blue 185 removal from water

摘要: Abstract Facile preparation of hierarchical structure NaY zeolite from cogon grass silica is synthesized by microwave-assisted hydrothermal method and subsequently desilicated in ultrasonic-assisted alkaline treatment. This work aims to improve the removal efficiency acid blue-185 (AB-185) using zeolite. When treated parent NaOH solution with various concentrations (0.1, 0.5 1.0 M), Si/Al ratios micropore surface area decrease but increase a maximum pore size distribution mesopore concentration due desilication effect. Moreover, volume significantly reach value 0.5 M (132 m2 g−1 0.12 cm3 g−1). Consequently, (0.5 M) gives highest percentage AB-185 (80 ± 1.2 %) at pH 5 owing abundant adsorption sites eased accessibility dye molecules. The data fit well Langmuir isotherm rather than Freundlich models correlation coefficient 0.99. Maximum capacity on larger that (84.5 mg/g vs 19.4 mg/g). In addition, process more favorable pseudo-second-order kinetic model indicating main rate-control chemisorption. existence interactions between confirmed FTIR XPS. reusability preserves original capacity, up five cycles promising adsorbent for water