Te whakataurite i nga paanga maimoatanga o te ferrous sulfate me te konutai bisulfite
Me piauau te tukanga o te whakangao hiko, a, i te wa o te purenga piauau, ko te tikanga ka whakamahia e te tipu whakakikorua hiko te chromate, no reira ka puta mai te wai parapara e mau ana i te chromium na te whakakikorua o te chromium.Ko te chromium kei roto i te wai para kei roto ko te chromium he hexavalent chromium, he paitini, he uaua ki te tango.Hexavalent chromium ka huri ki te trivalent chromium ka tangohia.Mo te tango i te wai parapara hiko e mau ana i te chrome, ka whakamahia te whakakotahitanga matū me te rerenga ki te tango.Ko te nuinga o te whakamahi ko te ferrous sulfate me te huarahi whakaheke kotakota me te konutai bisulfite me te tikanga whakaheke alkali.
1. ferrous pūkawa ngāwha me te kotakota whakaiti tikanga rerenga
Ko te ferrous sulfate he waikawa waikawa kaha me te kaha o te whakaheke i te waiora.Ka taea te whakaheke tika i te ferrous sulfate ki te hexavalent chromium i muri i te hauwai i roto i te wai para, ka huri hei waahanga o te trivalent chromium coagulation me te ua, katahi ka taapirihia he kotakota hei whakatika i te uara pH ki te 8 ~ 9, kia taea ai te awhina i te tauhohenga coagulation ki whakaputa chromium hydroxide precipitation, ka taea e te tangohanga o te chromate te 94%.
Ferrous sulfate me te kotakota coagulant reduction chromate precipitation he pai te painga ki te tango chromium me te utu iti.Tuarua, kaore he take ki te whakatika i te uara pH i mua i te taapiri o te ferrous sulfate, me tapiri he kotakota hei whakatika i te uara pH.Heoi, na te nui o te nui o te whakangao ferrous sulfate i nui ake ai te paru rino, i piki ake ai te utu mo te maimoatanga para.
2,.konutai bisulfite me alkali whakaiti tikanga rerenga
Ko te konutai bisulfite me te chromate te whakaheke alkali, ka whakatikahia te pH o te wai para ki te ≤2.0.Na ka taapirihia te konutai bisulfite ki te whakaheke i te chromate ki te trivalent chromium, ka uru te wai para ki roto i te puna whanui i muri i te otinga o te whakahekenga, ka panaia te wai para ki te puna whakahaere mo te whakatikatika, ka whakatikahia te uara pH ki te 10 ma te taapiri alkali node, katahi ka tukuna te wai para ki te taika parataiao hei whakaheke i te chromate, ka tae ki te 95%.
Ko te tikanga o te konutai bisulfite me te alkali reduction precipitation chromate he pai mo te tango i te chromium, a he nui ake te utu i te ferrous sulfate, a he roa ake te wa tauhohenga maimoatanga, me te uara pH me whakatika ki te waikawa i mua i te maimoatanga.Heoi, ka whakatauritea ki te maimoatanga ferrous sulfate, ko te tikanga karekau e nui rawa te hanga o te para, ka tino whakaiti i te utu mo te maimoatanga para, ka taea te whakamahi ano i te para i mahia.
Wā tuku: Maehe-07-2024
