‘Waste’ coir pith—a potential biomass for the treatment of dyeing wastewaters

‘Waste’ coir pith—a potential biomass for the treatment of dyeing wastewaters

Removal of acid dyes (acid violet and acid brilliant blue) and basic dyes (rhodamine B and methylene blue) was carried out using ‘waste’ coir pith as adsorbent. Parameters like agitation time, adsorbent dosage and pH effect were studied. Adsorption followed the first-order rate expression. The equil...

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Veröffentlicht in:Biomass & bioenergy 2001-01, Vol.21 (6), p.477-483
Hauptverfasser: Namasivayam, C, Dinesh Kumar, M, Selvi, K, Ashruffunissa Begum, R, Vanathi, T, Yamuna, R.T
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Sprache:eng
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Adsorption
Coir pith
Desorption
Dyes
Isotherms
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container_end_page 483
container_issue 6
container_start_page 477
container_title Biomass & bioenergy
container_volume 21
creator Namasivayam, C
Dinesh Kumar, M
Selvi, K
Ashruffunissa Begum, R
Vanathi, T
Yamuna, R.T
description Removal of acid dyes (acid violet and acid brilliant blue) and basic dyes (rhodamine B and methylene blue) was carried out using ‘waste’ coir pith as adsorbent. Parameters like agitation time, adsorbent dosage and pH effect were studied. Adsorption followed the first-order rate expression. The equilibrium data fit well with both Langmuir and Freundlich models of adsorption. Desorption experiments confirmed that major mode of adsorption is ion-exchange for the dyes acid brilliant blue and methylene blue whereas acid violet showed mainly physical adsorption. Chemisorption seems to be the major mode of adsorption for rhodamine B.
doi_str_mv 10.1016/S0961-9534(01)00052-6
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subjects Adsorption
Coir pith
Desorption
Dyes
Isotherms
title ‘Waste’ coir pith—a potential biomass for the treatment of dyeing wastewaters
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