Water purification methods

Details Water purification methods Water purification methods

1977-06-13

1978-09-26

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 28, 210 29, 210 40, C02B 114

Patent

active

041168267

ABSTRACT:
Treating water with various grades of attapulgite clay and sepiolite using contacting or percolation techniques removes substances not removable by standard water purification methods under many conditions. Substances such as pesticides, toxins, hormones, heavy metal cations and viruses are removed from water by adsorption upon the clay surface. When contacting is employed, the clay containing the adsorbed substances is subsequently removed by sedimentation or filtration. The clays can be regenerated by appropriate chemical or thermal techniques.

REFERENCES:
patent: 2808154 (1957-10-01), Scott
patent: 3171801 (1965-03-01), Rice et al.
patent: 3873581 (1975-03-01), Fitzpatrick et al.
patent: 3917530 (1975-11-01), Boske
patent: 3959128 (1976-05-01), Harris
Robertson, R.H.S., "Sepiolite: A Versatile Raw Material" in Chemistry and Industry, Nov. 1975, pp. 1492-1495.

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