Imfuno yeoksijini yekhemikhali, ekwabizwa ngokuba kukusetyenziswa kweoksijini yeekhemikhali, okanye i-COD ngokufutshane, isebenzisa ii-oxidants zemichiza (ezifana ne-potassium dichromate) ukuze i-oxidize kwaye ibolise izinto ezixutywe ne-oxidizable (ezifana ne-organic matter, nitrite, i-ferrous salts, sulfides, njl.) emanzini, kwaye ke ukusetyenziswa kwe-Oxygen kubalwa ngokusekelwe kwisixa se-oxidant eseleyo. Njengemfuno yeoksijini ye-biochemical (BOD), luphawu olubalulekileyo lweqondo lokungcoliseka kwamanzi. Iyunithi yeCOD yi ppm okanye mg/L. Ixabiso elincinci, lisezantsi iqondo lokungcoliseka kwamanzi. Kuphononongo longcoliseko lwemilambo kunye neepropati zamanzi amdaka kwimizi-mveliso, kunye nasekusebenzeni nasekulawuleni amaziko okucoca amanzi amdaka, kubalulekile kwaye kulinganiswe ngokukhawuleza iparamitha yongcoliseko lweCOD.
Imfuno ye-oksijini yeekhemikhali (COD) isoloko isetyenziswa njengesalathisi esibalulekileyo sokulinganisa umxholo wezinto eziphilayo emanzini. Okukhona imfuno yemichiza yeoksijini, kokukhona umzimba wamanzi ungcoliswa zizinto eziphilayo. Kumlinganiselo wemfuno yemichiza yeoksijini (COD), amaxabiso alinganisiweyo ayahluka ngokuxhomekeke kwizinto ezicuthayo kwisampulu yamanzi kunye neendlela zokulinganisa. Ezona ndlela zixhaphakileyo zokumisela okwangoku yi-acidic potassium permanganate oxidation kunye ne-potassium dichromate oxidation.
Izinto eziphilayo ziyingozi kakhulu kwiinkqubo zamanzi zemizi-mveliso. Ukuthetha ngokuthe ngqo, imfuno ye-oksijini yeekhemikhali ikwabandakanya izinto zokunciphisa i-inorganic ezikhoyo emanzini. Ngokuqhelekileyo, ekubeni isixa se-organic matter kumanzi amdaka sikhulu kakhulu kunomthamo we-inorganic matter, imfuno yemichiza yeoksijini isetyenziswa ngokubanzi ukumela isixa esipheleleyo sezinto eziphilayo kumanzi amdaka. Ngaphantsi kweemeko zokulinganisa, izinto eziphilayo ezingenayo initrogen emanzini zixutywa ngokulula nge-potassium permanganate, ngelixa izinto eziphilayo eziqulethe i-nitrogen kunzima ukubola. Ke ngoko, ukusetyenziswa kweoksijini kulungele ukulinganisa amanzi endalo okanye amanzi amdaka ngokubanzi aqulathe izinto eziphilayo ezixutywe lula, ngelixa amanzi amdaka avela kwimizi-mveliso enamalungu antsonkothileyo ahlala esetyenziselwa ukulinganisa imfuno yeoksijini yeekhemikhali.
Impembelelo yeCOD kwiinkqubo zokunyanga amanzi
Xa amanzi aqulethe isixa esikhulu sezinto eziphilayo edlula kwi-desalination system, iya kungcolisa i-ion exchange resin. Phakathi kwabo, kulula ngakumbi ukungcolisa i-anion exchange resin, ngaloo ndlela ukunciphisa umthamo wokutshintshiselana nge-resin. Izinto eziphilayo zingancitshiswa malunga ne-50% ngexesha lonyango lwangaphambili (i-coagulation, ukucaciswa kunye nokuhluzwa), kodwa izinto eziphilayo azikwazi ukususwa ngokufanelekileyo kwinkqubo yokukhupha ityuwa. Ke ngoko, amanzi okwakheka asoloko eziswa kwibhoyila ukunciphisa ixabiso le-pH yamanzi kwibhoyila. , kubangela ukubola kwenkqubo; ngamanye amaxesha izinto eziphilayo zinokungeniswa kwisixokelelwano somphunga kunye namanzi e-condensate, ukunciphisa ixabiso le-pH, elinokubangela ukubola kwenkqubo.
Ukongezelela, umxholo ogqithiseleyo wezinto eziphilayo kwinkqubo yamanzi ejikelezayo uya kukhuthaza ukuveliswa kwe-microbial. Ngoko ke, kungakhathaliseki ukuba i-desalination, amanzi kwibhoyila okanye iinkqubo zamanzi ajikelezayo, i-COD ephantsi, ingcono, kodwa okwangoku akukho salathiso samanani esidibeneyo.
Qaphela: Kwinkqubo yamanzi okupholisa okujikelezayo, xa i-COD (indlela ye-KMnO4) i> 5mg / L, umgangatho wamanzi uqalise ukuhla.
Impembelelo ye-COD kwi-ikholoji
Isiqulatho seCOD esiphezulu sithetha ukuba amanzi aqulathe isixa esikhulu sezinto zokunciphisa, ingakumbi izingcolisi eziphilayo. Okukhona iphezulu i-COD, kokukhona kubi kakhulu ungcoliseko lwendalo kumanzi omlambo. Imithombo yolungcoliseko lwendalo zizibulali-zinambuzane ngokubanzi, izityalo zemichiza, izichumisi eziphilayo, njl.njl. Ukuba azinyangwa kwangethuba, izinto ezingcolisa izinto eziphilayo ezininzi zinokubhengezwa yintlenge emlanjeni kwaye zifakwe, zibangele ityhefu engapheliyo kubomi basemanzini kwezimbalwa zilandelayo. iminyaka.
Emva kokufa kwenani elikhulu lezinto eziphila emanzini, i-ecosystem emlanjeni iya kutshatyalaliswa ngokuthe ngcembe. Ukuba abantu bazondla kwizinto ezinjalo emanzini, baya kuthabatha inani elikhulu leetyhefu ezivela kwezi zinto eziphilayo kwaye baziqokelele emzimbeni. Ezi tyhefu zihlala zi-carcinogenic, deformational, kunye ne-mutagenic, kwaye ziyingozi kakhulu kwimpilo yabantu. Ukongeza, ukuba amanzi omlambo angcolisekileyo asetyenziselwa ukunkcenkceshela, izityalo nezityalo nazo ziya kuchaphazeleka kwaye zikhule kakubi. Ezi zityalo zingcolisekileyo azinakutyiwa ngabantu.
Nangona kunjalo, imfuno ephezulu yeekhemikhali ye-oksijeni ayithethi ukuba kuya kubakho iingozi ezikhankanywe ngasentla, kwaye isiphelo sokugqibela sinokufikelelwa kuphela ngohlalutyo olucacileyo. Umzekelo, hlalutya iintlobo zezinto eziphilayo, yintoni impembelelo ezi zinto ziphilayo kumgangatho wamanzi kunye ne-ecology, kwaye ingaba ziyingozi na emzimbeni womntu. Ukuba uhlalutyo oluneenkcukacha alunakwenzeka, unokulinganisa imfuno ye-oksijini yekhemikhali yesampulu yamanzi kwakhona emva kweentsuku ezimbalwa. Ukuba ixabiso lehla kakhulu xa lithelekiswa nexabiso langaphambili, oko kuthetha ukuba izinto ezicuthayo eziqulethwe emanzini ubukhulu becala ziyinto eyonakaliswa lula yezinto eziphilayo. Izinto eziphilayo ezinjalo ziyingozi kumzimba womntu kwaye iingozi zeBiological zincinci.
Iindlela eziqhelekileyo zokuthotywa kwamanzi amdaka e-COD
Okwangoku, indlela ye-adsorption, indlela ye-chemical coagulation, indlela ye-electrochemical, indlela ye-ozone oxidation, indlela ye-biological, i-micro-electrolysis, njl. ziindlela eziqhelekileyo zokuthotywa kwamanzi amdaka e-COD.
Indlela yokubona i-COD
I-spectrophotometry yokugaya ngokukhawuleza, indlela yokufumanisa i-COD yeNkampani ye-Lianhua, inokufumana iziphumo ezichanekileyo ze-COD emva kokufaka i-reagents kunye nokugaya isampuli kwii-165 degrees kwimizuzu eyi-10. Kulula ukuyisebenzisa, inedosi ye-reagent ephantsi, ungcoliseko oluphantsi, kunye nokusetyenziswa kwamandla aphantsi.
Ixesha lokuposa: Feb-22-2024
