Phenol and chlorophenol removal from aqueous solution by organobentonites

Authors
Citation
Sh. Lin et Mj. Cheng, Phenol and chlorophenol removal from aqueous solution by organobentonites, ENV TECHNOL, 21(4), 2000, pp. 475-482
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ENVIRONMENTAL TECHNOLOGY
ISSN journal
0959-3330 → ACNP
Volume
21
Issue
4
Year of publication
2000
Pages
475 - 482
Database
ISI
SICI code
0959-3330(200004)21:4<475:PACRFA>2.0.ZU;2-X
Abstract
Experimental investigations were conducted on the adsorption characteristic s of phenol and m-chlorophenol by organobentonites. The organobentonites we re prepared by modifying the natural bentonite by various quaternary amines including tetramethylammonium bromide (TMAB), hexadecyltrimethylammonium b romide (HDTMAB) benzyltriethylammonium bromide (BTEAB), tetraethylammonium bromide (TMAB) and cetylpyridinium bromide (CPB), all surfactants. The empi rical Freundlich isotherm was found to describe well the equilibrium adsorp tion data. Multistage adsorption of phenol or chlorophenol by organobentoni tes was investigated both theoretically and experimentally. Theoretical equ ations were found to predict reasonably well the observed data. Preliminary regeneration of the exhausted organobentonites was also attempted. Results from several test runs showed the potential of regeneration by a simple th ermal method.