Modelling and Fixed Bed Column Adsorption of Cr(VI) onto Orthophosphoric Acid-activated Lignin

The advantage of using an available and abundant residual biomass, such as lignin, as a raw material for activated carbons is that it provides additional economical interest to the technical studies. In the current investigation, a more complete understanding of adsorption of Cr(VI) from aqueous sys...

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Veröffentlicht in:中国化学工程学报:英文版 2012, Vol.20 (3), p.469-477
1. Verfasser: Ahmad B. Albadarin hirangano Mangwandi Ala'a H. AI-Muhtaseb Gavin M. Walker Stephen J. Allen Mohammad N.M. Ahmad
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creator Ahmad B. Albadarin hirangano Mangwandi Ala'a H. AI-Muhtaseb Gavin M. Walker Stephen J. Allen Mohammad N.M. Ahmad
description The advantage of using an available and abundant residual biomass, such as lignin, as a raw material for activated carbons is that it provides additional economical interest to the technical studies. In the current investigation, a more complete understanding of adsorption of Cr(VI) from aqueous systems onto HaPO4-acid activated lignin has been achieved via microcolumns, which were operated under various process conditions. The practice of using microcolumn is appropriate for defining the adsorption parameters and for screening a large number of poten- tial adsorbents. The effects of solution pH (2-8), initial metal ion concentration (0.483-1.981 mmol.L-1), flow rate (1.0-3.1 cm3-min-1), ionic strength (0.01-0.30 mmol-L-1) and adsorbent mass (0.11 0.465 g) on Cr(VI) adsorption were studied by assessing the microcolmnn breakthrough curve. The microcolumn data were fitted by the Thomas model, the modified Dose model and the BDST model. As expected, the adsorption capacity increased with initial Cr(VI) concentration. High linear flow rates, pH values and ionic strength led to early breakthrough of Cr(VI). The model constants obtained in this study can be used for the design of pilot scale adsorption process.
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The effects of solution pH (2-8), initial metal ion concentration (0.483-1.981 mmol.L-1), flow rate (1.0-3.1 cm3-min-1), ionic strength (0.01-0.30 mmol-L-1) and adsorbent mass (0.11 0.465 g) on Cr(VI) adsorption were studied by assessing the microcolmnn breakthrough curve. The microcolumn data were fitted by the Thomas model, the modified Dose model and the BDST model. As expected, the adsorption capacity increased with initial Cr(VI) concentration. High linear flow rates, pH values and ionic strength led to early breakthrough of Cr(VI). The model constants obtained in this study can be used for the design of pilot scale adsorption process.</description><identifier>ISSN: 1004-9541</identifier><identifier>EISSN: 2210-321X</identifier><language>eng</language><subject>Cr(Ⅵ) ; 固定床吸附 ; 建模 ; 木质素 ; 磷酸活化 ; 离子强度 ; 金属离子浓度 ; 铬(VI)</subject><ispartof>中国化学工程学报:英文版, 2012, Vol.20 (3), p.469-477</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/84275X/84275X.jpg</thumbnail><link.rule.ids>314,780,784,4024</link.rule.ids></links><search><creatorcontrib>Ahmad B. Albadarin hirangano Mangwandi Ala'a H. AI-Muhtaseb Gavin M. Walker Stephen J. Allen Mohammad N.M. Ahmad</creatorcontrib><title>Modelling and Fixed Bed Column Adsorption of Cr(VI) onto Orthophosphoric Acid-activated Lignin</title><title>中国化学工程学报:英文版</title><addtitle>Chinese Journal of Chemical Engineering</addtitle><description>The advantage of using an available and abundant residual biomass, such as lignin, as a raw material for activated carbons is that it provides additional economical interest to the technical studies. In the current investigation, a more complete understanding of adsorption of Cr(VI) from aqueous systems onto HaPO4-acid activated lignin has been achieved via microcolumns, which were operated under various process conditions. The practice of using microcolumn is appropriate for defining the adsorption parameters and for screening a large number of poten- tial adsorbents. The effects of solution pH (2-8), initial metal ion concentration (0.483-1.981 mmol.L-1), flow rate (1.0-3.1 cm3-min-1), ionic strength (0.01-0.30 mmol-L-1) and adsorbent mass (0.11 0.465 g) on Cr(VI) adsorption were studied by assessing the microcolmnn breakthrough curve. The microcolumn data were fitted by the Thomas model, the modified Dose model and the BDST model. As expected, the adsorption capacity increased with initial Cr(VI) concentration. High linear flow rates, pH values and ionic strength led to early breakthrough of Cr(VI). 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subjects Cr(Ⅵ)
固定床吸附
建模
木质素
磷酸活化
离子强度
金属离子浓度
铬(VI)
title Modelling and Fixed Bed Column Adsorption of Cr(VI) onto Orthophosphoric Acid-activated Lignin
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