Compositions for treating waste water which contains heavy metal

Details Compositions for treating waste water which contains heavy metal Compositions for treating waste water which contains heavy metal

1994-02-14

1995-03-14

Willis, Jr., Prince

Compositions

Water-softening or purifying or scale-inhibiting agents

Water-insoluble base-exchange agent containing

252175, 210679, 210638, C02F 502

Patent

active

053975006

ABSTRACT:
A composition for treating waste water comprising Natrolite [Na.sub.2 Al.sub.2 Si.sub.3 O.sub.10. 2H.sub.2 O] from 30 to 40 weight %, Montmorillonite from 20 to 30 weight %, Calcium hydroxide [Ca(OH).sub.2 ] from 20 to 30 weight %, Aluminum sulphate [Al.sub.2 (SO.sub.4).sub.3. 7H.sub.2 O] from 1.5 to 3.5 weight % and Magnesium oxide catalyst agent from 10 to 15 weight percent. The composition is effective in treating waste water containing various heavy metals, particularly, Cu, Ni, Zn, Fe, Pb, Cr.sup.6+ and cyanide and in deoderizing and decreasing chemical oxygen demand (COD).

REFERENCES:
patent: 2206691 (1940-07-01), Furness et al.
patent: 4079019 (1978-03-01), Scherzer et al.
patent: 4094778 (1978-06-01), Denny et al.
patent: 4853130 (1989-08-01), D'Angelo et al.
patent: 5264133 (1993-11-01), Forschner et al.
Hawley's Condensed Chemical Dictionary, 11th Ed. Van Nostrand Reinhold NY 1987, p. 811, 1249.

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