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: ( ).


()

– , - () . - . , , , , .
- . 1.

. 1. () () .

1 – ;
2 – ;
3 – ;
4 – ;

5 – .

, , .. , , , , , . , ( ) , . ( ) , ; .

- , :

(1) ,
(2) ,
(3) .

.

, , . (. 1). – , – . - :

(1) – ;
(2) – Cr3+
(3) – , Cr2(CrO4)3.
95-99% 50% . – (. 1), . - , . 50% 98 – 99%.

, , , , (, .).

-

- , , . Cr(VI) Cr(III), (Zn, Cd Cu) . , :

3Zn + 2CrO42- + 16H+ → 3Zn2++ 2Cr3+ + 8H2O (1)

, [1-16].

, (. 1), Zn2+ , Cr3+ :

Cr3+ + 4H2O →CrO42- + 8H++ 3- (2)
Zn2+    → Zn2+
, (2) .. , Cr(VI)/Cr(III). , , – .

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19.04.2011   

18.04.2011  : -8, -68, -32, -20, -68,-5, -40, -50, -5, -10, -220(), ,  

04.04.2011  -, .  

19.04.2011   

19.04.2011   

19.04.2011  /.  

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