CALCIUM CARBONATE HAVING TREATED SURFACE AND USE THEREOF IN WASTE WATER TREATMENT Russian patent published in 2013 - IPC C02F1/28 B01J20/04 B01J20/20 B01J20/30 

Abstract RU 2482068 C2

FIELD: chemistry.

SUBSTANCE: present invention relates to a water treatment method. Natural calcium carbonate with an activated surface is brought into contact with treated water. The natural calcium carbonate with an activated surface used in the method is a product of reaction of natural calcium carbonate with an acid and carbon dioxide formed in situ during acid treatment and/or coming from an external source. The calcium carbonate is prepared in form of an aqueous suspension with pH higher than 6.0. A polymer flocculant is also added to the treated water after adding the natural calcium carbonate with an activated surface.

EFFECT: high cost efficiency of the treatment method and high efficiency of removing a wide range of pollutants from treated water.

31 cl, 7 tbl, 6 ex

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RU 2 482 068 C2

Authors

Gejn Patrik A. S.

Shelkopf Joakhim

Gantenbajn Daniehl'

Dzherard Dehniel E

Dates

2013-05-20Published

2008-03-19Filed