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COD(,136201):COD,COD,:COD;AgCI;;:TQ111:A:1008-8725(2008)03-0150-01PreliminryDiscussionAboutcollectingMethodofMetalloc-ionFromCODSewageJINLi(LiaoyuanMiningGroupCorporation,Liaoyuan136201,China)Abstract:CODshowstheextentofwaterqualitypollutioncausedbyreducingsudstances,thedrainingsewageaftertestingCODproducesnextenvironmentpollution.Thetreatisestateshowtousechemicalwaystocollectmetallic-ionfromsewage,thenthedrainingsewageisnonpoll.Keywords:COD;AgCL;sewage;nonpollutingdraining1(1)AgAgCI,(),,,Ag2CI,,:Ag++CI-=AgCI(2)HgS200ml(6),NaSHgS,15min,HgS,3,:Hg2++S2-=AgS(3),Fe3+,Cr3+,,:Fe3++3OH-=Fe(OH)Cr3+3OH=Cr(OH)(4)HgSHgO:HgS1100ml,6M35ml,,5min,NaS,HgS,3:5mlHgS,20ml,,,S,6MNaOH,3,:3HgS+6HCI+2HNO=3HgCI+NO+3S+4HOHgCI2+NaOH=HgO+2NaCI+HO:50ml,6M,,20ml,,3,,,2COD96.25%,95.1%,,,10L13,,,,,,:[1].[M].:,1990.[2].[M].:,1989.:2007-12-10;:2008-01-06:(1958-),,,,,Tel:1351437396027320083CoalTechnologyVol127,No13Mar,2008