Abstract
The uptake of aluminium by
scoured and chemically modified wool from aqueous solutions of
aluminium sulphate, chloride, and fluoride has been
investigated. The effects of temperature, length of treatment, pH,
concentration of aluminium salt, anion present, and the presence or absence of
swelling agents have been determined. For maximum aluminium uptake an aluminium
concentration of about 0.01M aluminium at pH 3.5-4 should be used. In general,
it was found that aluminium could be removed by washing sufficiently. It was
shown that the aluminium was bound ionically to
carboxylate or sulphonate groups present on the wool, as well as by Van der Waals forces to non-specific
sites on the wool.
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