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Removal of Cd 2+ by hydroxyapatite adsorption granule from aqueous solution
Author(s) -
Duyen Le Thi,
Thao Le Thi Phuong,
Hai Do Thi,
Dung Pham Tien,
Nam Pham Thi,
Thom Nguyen Thi,
Hong Cao Thi,
Linh Cao Thuy,
Thanh Dinh Thi Mai
Publication year - 2018
Publication title -
vietnam journal of chemistry
Language(s) - English
Resource type - Journals
eISSN - 2572-8288
pISSN - 0866-7144
DOI - 10.1002/vjch.201800044
Subject(s) - polyvinyl alcohol , adsorption , aqueous solution , granule (geology) , freundlich equation , langmuir , nuclear chemistry , langmuir adsorption model , chemistry , sintering , ion , chemical engineering , materials science , chromatography , inorganic chemistry , organic chemistry , composite material , engineering
Hydroxyapatite (HAp) adsorption granules with average size of 2 × 10 mm was fabricated from HAp powder and polyvinyl alcohol (PVA) additive by sintering for removing of Cd 2+ ions from aqueous solution. The effect of some factors on the Cd 2+ adsorption efficiency and capacity was investigated. The removal efficiency and capacity reached 86.5 % and 4.33 mg/g, respectively, at condition: HAp granule mass of 0.3 g, initial Cd 2+ concentration of 30 mg/L, contact time of 40 minutes and pH 0 of 5.7 at 30°C. The experimental data was described by Langmuir and Freundlich isotherm models; pseudo‐first order and pseudo‐second order kinetic equations.