eprintid: 10575
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/05/75
datestamp: 2023-11-09 16:37:11
lastmod: 2023-11-09 16:37:11
status_changed: 2023-11-09 16:31:43
type: article
metadata_visibility: show
creators_name: Ahmad, A.
creators_name: Bhat, A.H.
creators_name: Buang, A.
title: Biosorption of transition metals by freely suspended and Ca-alginate immobilised with Chlorella vulgaris: Kinetic and equilibrium modeling
ispublished: pub
keywords: Alginate; Biomass; Biosorption; Calcium; Calcium compounds; Chemicals removal (water treatment); Dyes; Effluents; Heavy metals; Isotherms; Kinetics; Manganese; Manganese compounds; Metal ions; Oil shale; Palm oil; Solutions; Thermodynamics; Transition metals; Zinc, Chlorella vulgaris; Heavy metals pollution; Immobilisation; Industrial wastewaters; Isotherm modeling; Palm oil mill effluents; Pseudo second order kinetics; Thermodynamic parameter, Metals
note: cited By 122
abstract: In this study, biosorption of Fe (II), Mn (II), and Zn (II) ions, from aqueous solution with free (non-immobilised) and Ca-alginate beads with immobilised Chlorella vulgaris biomass was investigated. Effects of pH, metal ions concentration, biosorbent dosages and contact time on the biosorption of selected metallic ions were studied. The maximum biosorption of Fe (II) 129.83, Mn (II) 115.90 and Zn (II) 105.29 mg/g was achieved with Ca-alginate immobilised microalgal biomass at optimum pH of 6.0, biomass dosage, 0.4 g/L, and contact time of 300 min and at 25 °C temperature. The biosorption efficiency of freely suspended and immobilised C. vulgaris biomass for the heavy metals removal from the industrial wastewater Palm Oil Mill Effluent (POME) was validated. The metallic ions biosorption on the Ca-alginate immobilised microalgae followed the pseudo-second-order kinetics model and the experimental data were well fitted to the Langmuir and D-R isotherm models. The calculated thermodynamic parameters, �Go, �Ho and �So exhibited that the biosorption of all tested metal ions onto freely suspended and Ca-alginate immobilised algal cells was feasible, spontaneous and exothermic in nature under observed conditions. The biosorption mechanism of C. vulgaris illustrated by FTIR and XPS showed bands conforming to CsbndN, sbndOH, COOsbnd, sbndCH, CdbndC, CdbndS and sbndCsbnd groups are closely related with the binding of heavy metals. The SEM showed porous morphology which greatly helps in the biosorption of heavy metals. This study confirmed that immobilisation of C. vulgaris in alginate beads constitute a favorable, effective, economical and biodegradable biosorbent material for the removal of heavy metals pollution in the environment. © 2017 Elsevier Ltd
date: 2018
publisher: Elsevier Ltd
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034091213&doi=10.1016%2fj.jclepro.2017.09.252&partnerID=40&md5=5b9ddb001b28ab563f77cf5656f33893
id_number: 10.1016/j.jclepro.2017.09.252
full_text_status: none
publication: Journal of Cleaner Production
volume: 171
pagerange: 1361-1375
refereed: TRUE
issn: 09596526
citation:   Ahmad, A. and Bhat, A.H. and Buang, A.  (2018) Biosorption of transition metals by freely suspended and Ca-alginate immobilised with Chlorella vulgaris: Kinetic and equilibrium modeling.  Journal of Cleaner Production, 171.  pp. 1361-1375.  ISSN 09596526