naa a22 4500 510749356 CHVBK 20180411083058.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11270-013-1582-5 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1582-5 Tobacco Stem Ash as an Adsorbent for Removal of Methylene Blue from Aqueous Solution: Equilibrium, Kinetics, and Mechanism of Adsorption [Elektronische Daten] [Rakesh Ghosh, D. Reddy] Tobacco (Nicotiana tabacum L.) stem ash (TSA) was evaluated as an adsorbent for removal of methylene blue (MB) from aqueous solution by batch adsorption method. MB adsorption increased with increase in contact time, initial solution pH, and adsorbent dose. Contact time for adsorption equilibrium was 180min. The MB adsorption per unit mass of adsorbent (in milligram per gram) increased with the increasing initial dye concentration. Adsorption of MB onto TSA followed the pseudo-second-order kinetic model with a rate constant (k 2) of 0.017gmg−1min−1. The mechanism of adsorption was described with intra-particle diffusion model. It was found that the intra-particle diffusion was not a sole rate-controlling step. Equilibrium adsorption was investigated by the Freundlich, Langmuir, Temkin, and Jovanoic isotherms. On the basis of coefficient of determination, the order of isotherm fit was Langmuir (R 2 = 0.974) > Freundlich (R 2 = 0.957) = Temkin (R 2 = 0.957) > Jovanoic (R 2 = 0.764) isotherm. The maximum monolayer adsorption capacity of TSA was 35.7mgg−1. The dimensionless separation factor (R L) was low (0.137), indicating favorable adsorption of MB onto TSA. The results clearly demonstrate the potential of TSA as a low-cost and an easily available adsorbent for sequestering MB from wastewater. Springer Science+Business Media Dordrecht, 2013 Tobacco stem ash nationallicence Methylene blue removal nationallicence Adsorption kinetics nationallicence Isotherm models nationallicence Ghosh Rakesh Division of Crop Chemistry and Soil Science, Central Tobacco Research Institute, 533105, Rajahmundry, Andhra Pradesh, India aut Reddy D. Division of Crop Chemistry and Soil Science, Central Tobacco Research Institute, 533105, Rajahmundry, Andhra Pradesh, India aut Water, Air, & Soil Pollution Springer Netherlands 224/6(2013-06-01), 1-12 0049-6979 224:6<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1582-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1582-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ghosh Rakesh Division of Crop Chemistry and Soil Science, Central Tobacco Research Institute, 533105, Rajahmundry, Andhra Pradesh, India aut NATIONALLICENCE 700 1- Reddy D. Division of Crop Chemistry and Soil Science, Central Tobacco Research Institute, 533105, Rajahmundry, Andhra Pradesh, India aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/6(2013-06-01), 1-12 0049-6979 224:6<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer