Compositions for treating waste water which contains heavy...

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

C - Chemistry, Metallurgy

02

F

C02F 1/62 (2006.01) B01J 20/04 (2006.01) C02F 1/52 (2006.01) C02F 9/00 (2006.01)

Patent

CA 2112989

A composition for treating waste water comprising: Natrolite 30 - 40 (wt %) [ Na2Al2Si3O10 ~ 2H2O ] Montmorillonite 20 - 30 (wt %) [ SiO2, Al2O3, Na2O, etc.] Calcium hydroxide 20 - 30 (wt %) [ Ca(OH)2 ] Aluminum sulphate 1.5 - 3.5 (wt %) [ Al2(SO4)3 ~ 7H2O ] Catalyst agent 10.0 - 15.0 (wt %) [ MgO ] The composition is effective in treating waste water containing various heavy metals, particularly, Cu, Ni, Zn, Fe, Pb, Cr6+ and cyanide and in deodorizing and decreasing COD.

Une composition pour le traitement des eaux résiduelles renferme les constituants suivants : 30 à 40 % en poids de natrolite, Na2Al2Si3O10.2H2O; 20 à 30 % en poids de montmorillonite, SiO2, Al2O3, Na2O, etc.; 20 à 30 % en poids d'hydroxyde de calcium, Ca(OH)2; 1,5 à 3,5 % en poids de sulfate d'aluminium, Al2(SO4)3.7H2O; 10,0 à 15,0 % en poids de MgO, agent catalytique. La composition sert à traiter efficacement des eaux résiduelles renfermant divers métaux lourds, notamment Cu, Ni, Zn, Fe, Pb, Cr6+, ainsi que les cyanures, et enfin à désodoriser et à réduire la DCO.

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