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Title

Use of activated clays in the removal of dyes and surfactants from tannery waste waters

AuthorsEspantaleón, A. G.; Nieto, J. A.; Fernández, M. CSIC ; Marsal, Agustí CSIC ORCID
KeywordsAdsorption
Clays
Dyes
Non-ionic surfactant
Tannery
Issue Date29-Aug-2003
PublisherElsevier
CitationApplied Clay Science 24(1-2): 105-110 (2003)
AbstractA method is tested to reduce the pollution of effluents produced in the hide transformation process. Adsorption processes with clays could constitute a simple, selective and economical alternative to conventional physical–chemical treatments.
The adsorption capacity of natural and acid-activated bentonite and sepiolite for anionic dyes normally used in the tannery was compared with that of a conventional adsorbent such as activated carbon. Natural bentonite with a different level of acid activation was used to adsorb a non-ionic surfactant such as nonylphenol ethoxylated with 8 mol of ethylene oxide.
The capacity of sepiolite and acid-activated bentonite to adsorb anionic dyes normally used in the tannery was much greater than that of conventional adsorbents. A surfactant removal of 90% was achieved in approximately 10 min because of the high affinity between surfactant and adsorbent. Natural bentonite activated with 0.5 M H2SO4 was the most effective adsorbent for ethoxylated nonylphenol.
Description6 pages, 4 figures, 4 tables.-- Printed version published Nov 2003.-- Issue title: "Clay Minerals and the Environment".
Publisher version (URL)http://dx.doi.org/10.1016/S0169-1317(03)00153-4
URIhttp://hdl.handle.net/10261/21849
DOI10.1016/S0169-1317(03)00153-4
ISSN0169-1317 (Print)
Appears in Collections:(IQAC) Artículos

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