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Activated carbon adsorption treatment of spent pickle brine
Author(s) -
Ratnani Kebir,
Leduy Anh,
Ramalho Rubens S.
Publication year - 1980
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450580308
Subject(s) - activated carbon , adsorption , brine , dilution , chemistry , odor , pulp and paper industry , chromatography , organic chemistry , thermodynamics , physics , engineering
A continuous process for recovery of spent pickle brine (SPB) by preliminary filtration on a sand bed to remove suspended solids, followed by adsorption treatment in an activated carbon column to remove color and odor‐causing organic compounds is investigated. Batch isotherm adsorption experiments revealed that the adsorption capacity of the SPB‐activated carbon system is relatively insensitive to temperature variation (about 15% drop for a temperature rise from 0 to 40°C), but quite sensitive to the effect of dilution (about 25% lower for 90% SPB solution). Regenerated activated carbon behaved similarly to fresh carbon with only slightly lowered adsorption capacity. It is estimated that a low capital investment of 0.08 cent per liter of recycled treated SPB is required for a plant with a 190 000 L/d capacity. This cost is much lower than that of fresh salt, and thus will be defrayed by savings on recycled salt.