, .
, , .
Na+, K+, Mg2+. . , .
Ba2+, Sr2+, Ca2+. (NH4)2CO3 3. (NH4)2S H2S.
Al3+, Cr3+, Fe3+, Fe2+, Ni2+, Co2+, Mn2+, Zn2+ . (p H=79) (NH4)2S . H2S.
Cu2+, Cd2+, Hg2+, Bi3+, AsIII, AsV, SbIII, SbV, Sn2+, SnIV . H2S p H=0,5 , . H2S .
Ag+, , Pb2+ . l 2 /3. ³ .
, , , .
, .
.
( 25-30 )
H2S. .