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Biodecolorization of Basic Blue 41 using EM based Composts: Isotherm and Kinetics
Author(s) -
Pushpa T Bhagavathi,
Josephraj Jegan,
Saravanan Praveen,
Ravindran Gokulan
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901774
Subject(s) - biosorption , freundlich equation , chemistry , compost , sorption , langmuir , desorption , langmuir adsorption model , nuclear chemistry , azadirachta , adsorption , chromatography , botany , organic chemistry , agronomy , biology
The main goal of this research was to prepare composts from neem ( Azadirachta indica A. Juss) leaves and water hyacinth plant for the remediation of Basic Blue 41 (BB41) bearing wastewaters. The process of composting was performed using Effective Microorganisms (EM) for neem tree leaves ( EM LC ) and water hyacinth waste ( EM WHC ). Through preliminary experiments, for biosorption of BB41, 1.18 mm and 2 g/L were identified as the optimum particle size and compost dosage, respectively. The pH edge experiments revealed that pH 8 as optimum for BB41 biosorption and the isotherm experiments indicated that EM LC and EM WHC can biosorb 456.8 and 158.0 mg/g, respectively, according to the Langmuir model. The isotherm data were further examined using the Freundlich, Sips, Toth and Redlich‐Peterson models, with the later produced high R 2 values and good prediction. Biosorption of BB41 onto EM LC and EM WHC was rapid with 90% BB41 removal was achieved within first 90 and 120 min of contact, respectively. The biosorbed BB41 was effectively desorbed from EM LC and EM WHC using HCl, HNO 3 , H 2 SO 4 , NaOH and CaCl 2 with desorption efficiencies greater than 94%. Both EM LC and EM WHC were also regenerated and re‐used for BB41 biosorption in three consecutive sorption‐desorption cycles.