Siliceous adsorbent for heavy metals

Details Siliceous adsorbent for heavy metals Siliceous adsorbent for heavy metals

1979-11-27

1981-03-17

Cintins, Ivars C.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210674, 210688, C02F 142, C02F 162

Patent

active

042565871

ABSTRACT:
A low cost, effective method for removing heavy metal ions from aqueous solution which utilizes a porous, high surface-to-weight ratio siliceous adsorbent comprises the steps of activating the siliceous adsorbent, which is preferably a kaolin clay leach residue, with a basic salt of an alkali metal to incorporate alkali ions into the siliceous adsorbent and contacting the heavy metal ion-containing solution with the activated adsorbent whereby the heavy metal ions exchange with the alkali ions to remove the heavy metal ions from solution. The heavy metal ion loaded adsorbent may be stripped for subsequent reuse or, alternatively, utilized for flux in base metal smelting and the like.

REFERENCES:
patent: 2640756 (1953-06-01), Wills
patent: 3374182 (1968-03-01), Young
patent: 3882018 (1975-05-01), Depree
patent: 4051026 (1977-09-01), Cremers et al.
patent: 4100065 (1978-07-01), Etzel
patent: 4167481 (1979-09-01), Cremers et al.

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