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Removal of Some Organic Dyes by Hexane‐Extracted Spent Bleaching Earth
Author(s) -
Lee ChnoongKheng,
Low KunShe,
Chung LaiChing
Publication year - 1997
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199705)69:1<93::aid-jctb672>3.0.co;2-3
Subject(s) - sorbent , sorption , chemistry , hexane , aqueous solution , acid dye , diffusion , chromatography , adsorption , chemical engineering , nuclear chemistry , organic chemistry , dyeing , physics , engineering , thermodynamics
The removal of some organic dyes from aqueous solution by hexane‐extracted spent bleaching earth, a waste material from the palm oil industry, was investigated. It was noted that the material had better affinity for basic than acid dyes. Various parameters affecting the removal process were studied. These were pH, initial dye concentration, sorbent dosage, temperature and agitation rate in the batch process. Experimental data show that both the boundary layer and intraparticle diffusion effect play important roles in the rate of dye removal. Maximum sorption capacities for some basic and acid dyes studied compare favourably with those reported using other low‐cost sorbents. © 1997 SCI.