caa a22 4500 445388757 CHVBK 20180317143040.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11144-010-0247-2 doi (NATIONALLICENCE)springer-10.1007/s11144-010-0247-2 Adsorption kinetics and isotherm of methylene blue and its removal from aqueous solution using bone charcoal [Elektronische Daten] [Gh. Ghanizadeh, G. Asgari] This study aims at describing the removal of methylene blue (MB) from aqueous solution using bone charcoal (BC) as an adsorbent material. The effects of dye concentration, pH, contact time and the adsorbent dose were investigated. The chemical composition and solid structure of BC were analyzed using X-ray diffraction (XRD) and scanning electronic microscopy (SEM). The surface area was measured via the Brunauer-Emmett-Teller (BET) isotherm. The experimental data were analyzed with Langmuir, Freundlich and Temkin isotherm models. The results show that the main component of BC is calcium hydroxylapatite (Ca5(PO4)3OH). The BETSuface area of BC is approximately 100m2/g. The experimental adsorption isotherm complies with Langmuir equation model (R 2=0.99) and the maximum amount of adsorption (q max) was 5mg/g. The elevation of BC dose led to a decrease in q max, however, increasing the pH led to the elevation of dye adsorption. The kinetic studies revealed that the adsorption of MB is rapid and complies with the pseudo second-order kinetic (R 2>0.99). Apart from R 2, four error functions have been used for the validation of data. Analysis of data with Dubinin-Radushkevich isotherm showed that the energy of MB adsorption process onto BC was 2.65kJ/mol, which implies that the adsorption of MB with BC is a physical adsorption. Akadémiai Kiadó, Budapest, Hungary, 2010 Adsorption nationallicence Methylene blue nationallicence Dye removal nationallicence Bone charcoal nationallicence Ghanizadeh Gh Health Research Center and School of Health, Baqiyatallah University of Medical Sciences, Tehran, I.R. Iran aut Asgari G. Environmental Health Engineering Department, School of Public Health, Hamadan University of Medical Sciences, Hamadan, I.R. Iran aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/1(2011-02-01), 127-142 1878-5190 102:1<127 2011 102 11144 https://doi.org/10.1007/s11144-010-0247-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-010-0247-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ghanizadeh Gh Health Research Center and School of Health, Baqiyatallah University of Medical Sciences, Tehran, I.R. Iran aut NATIONALLICENCE 700 1- Asgari G. Environmental Health Engineering Department, School of Public Health, Hamadan University of Medical Sciences, Hamadan, I.R. Iran aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 102/1(2011-02-01), 127-142 1878-5190 102:1<127 2011 102 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer