I-oksijeni echithiweyo ibhekisela kwisixa se-oksijini echithwe emanzini, ngokuqhelekileyo irekhodwa njenge-DO, echazwe kwii-milligrams ze-oksijini ngelitha yamanzi (nge-mg / L okanye i-ppm).Ezinye iikhompawundi eziphilayo zihlanjululwe phantsi kwesenzo sebhaktheriya ye-aerobic, edla i-oksijini echithwe emanzini, kwaye i-oksijeni echithweyo ayinakuphinda ifakwe ngexesha.Ibhaktheriya ye-anaerobic kumzimba wamanzi iya kwanda ngokukhawuleza, kwaye i-organic matter iya kuguqula umzimba wamanzi ube mnyama ngenxa yorhwaphilizo.ivumba.Ubungakanani beoksijini enyibilikisiweyo emanzini luphawu lokulinganisa ukukwazi ukuzihlambulula kumzimba wamanzi.Ioksijini enyibilikisiweyo emanzini idliwe, kwaye kuthatha ixesha elifutshane ukubuyisela kwimeko yokuqala, ebonisa ukuba umzimba wamanzi unamandla okuzihlambulula, okanye ukuba ungcoliseko lwamanzi alubi kakhulu.Kungenjalo, kuthetha ukuba umzimba wamanzi ungcoliseke kakhulu, amandla okuzihlambulula abuthathaka, okanye amandla okuzihlambulula alahlekile.Inxulumene ngokusondeleyo noxinzelelo lwe-oksijini emoyeni, uxinzelelo lwe-atmospheric, ubushushu bamanzi kunye nomgangatho wamanzi.
I-1.Aquaculture: ukuqinisekisa imfuno yokuphefumla yeemveliso zasemanzini, ukubeka iliso ngexesha langempela lomxholo we-oksijini, i-alamu ezenzekelayo, i-oxygen ngokuzenzekelayo kunye neminye imisebenzi.
2. Ukujongwa komgangatho wamanzi endalo yamanzi: Ukubona iqondo longcoliseko kunye nokukwazi ukuzicoca kwamanzi, kunye nokuthintela ungcoliseko lwebhayoloji olufana ne-eutrophication yemithombo yamanzi.
3. Ukucocwa kwamanzi amdaka, izikhombisi zokulawula: itanki ye-anaerobic, itanki ye-aerobic, itanki ye-aeration kunye nezinye izibonakaliso zisetyenziselwa ukulawula umphumo wokucoca amanzi.
4. Ukulawula ukubola kwezinto zetsimbi kwimibhobho yokubonelela ngamanzi kwimizi-mveliso: Ngokuqhelekileyo, izinzwa ezinoluhlu lwe-ppb (ug / L) zisetyenziselwa ukulawula umbhobho ukufikelela kwi-oxygen eyi-zero ukukhusela i-rust.Ihlala isetyenziswa kwizityalo zamandla kunye nezixhobo zebhoyila.
Okwangoku, eyona mitha yeoksijini inyibilikisiwe kwimarike inemigaqo emibini yokulinganisa: indlela ye-membrane kunye nendlela ye-fluorescence.Ngoko ke yintoni umahluko phakathi kwezi zimbini?
1. Indlela yeMembrane (eyaziwa ngokuba yindlela yepolarography, indlela yoxinzelelo oluqhubekayo)
Indlela ye-membrane isebenzisa imigaqo ye-electrochemical.I-membrane ye-semi-permeable isetyenziselwa ukwahlula i-platinum cathode, i-anode yesilivere, kunye ne-electrolyte ngaphandle.Ngokuqhelekileyo, i-cathode iphantse idibane ngqo nale filimu.Ioksijini isasazeka kwimembrane ngokomlinganiselo olinganayo noxinzelelo oluyinxenye.Uxinzelelo olukhulu lweoksijini, ioksijini eninzi iya kudlula kwi-membrane.Xa i-oksijeni echithwe ngokuqhubekayo ingena kwi-membrane kwaye ingena kwi-cavity, iyancitshiswa kwi-cathode ukuvelisa okwangoku.Le yangoku ilingana ngokuthe ngqo kwi-oxygen concentration.Inxalenye yemitha iqhubela phambili i-amplifying processing ukuguqula umlinganiselo wangoku ube yiyunithi yoxinaniso.
2. I-Fluorescence
Iprobe ye-fluorescent inomthombo wokukhanya owakhelwe ngaphakathi okhupha ukukhanya okuluhlaza okwesibhakabhaka kunye nokukhanyisa umaleko we-fluorescent.Into ye-fluorescent ikhupha ukukhanya okubomvu emva kokuba nemincili.Ekubeni iimolekyuli ze-oksijini zinokuthatha amandla (isiphumo sokucima), ixesha kunye nokuqina kokukhanya okubomvu okuvuyisayo kuhambelana neemolekyuli ze-oksijini.Ugxininiso luhambelana ngokuphambeneyo.Ngokulinganisa umehluko wesigaba phakathi kokukhanya okubomvu okuvuyisayo kunye nokukhanya kwereferensi, kunye nokuthelekisa nexabiso langaphakathi lokulinganisa, ukuxinwa kwee-molecule ze-oksijini zingabalwa.Akukho oksijini esetyenzisiweyo ngexesha lokulinganisa, idatha izinzile, ukusebenza kuthembekile, kwaye akukho ukuphazamiseka.
Masiyihlalutye kumntu wonke ukusuka ekusebenziseni:
1. Xa usebenzisa i-electrode ye-polarographic, fudumeza ubuncinane imizuzu eyi-15-30 ngaphambi kokulinganisa okanye ukulinganisa.
2. Ngenxa yokusetyenziswa kwe-oksijini nge-electrode, ukuxinwa kwe-oksijini phezu kobuso beprobe kuya kuncipha ngokukhawuleza, ngoko ke kubalulekile ukuphazamisa isisombululo ngexesha lokulinganisa!Ngamanye amazwi, ngenxa yokuba umthamo weoksijini ulinganiswa ngokutya ioksijini, kukho impazamo ecwangcisiweyo.
3. Ngenxa yenkqubela phambili ye-electrochemical reaction, i-concentration ye-electrolyte isoloko ichithwa, ngoko kuyimfuneko ukongeza i-electrolyte rhoqo ukuze kuqinisekiswe ukugxininiswa.Ukuze kuqinisekiswe ukuba akukho bubbles kwi-electrolyte ye-membrane, kuyafuneka ukuba kususwe onke amagumbi olwelo xa ufaka i-membrane yentloko yomoya.
4. Emva kokuba i-electrolyte nganye yongezwa, umjikelo omtsha wokusebenza kokulinganisa (ngokuqhelekileyo i-zero point calibration emanzini angenayo i-oxygen kunye ne-slope calibration emoyeni) iyafuneka, kwaye ke nangona isixhobo esinembuyekezo yobushushu obuzenzekelayo sisetyenzisiweyo, kufuneka sisondele. ukuya Kungcono ukulinganisa i-electrode kubushushu besisombululo sesampuli.
5. Akukho bhubhu kufuneka ishiywe phezu kwe-membrane ye-semi-permeable ngexesha lenkqubo yokulinganisa, ngaphandle koko iya kufunda iibhubhu njengesampuli egcwele i-oxygen.Akukhuthazwa ukuba uyisebenzise kwitanki ye-aeration.
6. Ngenxa yezizathu zenkqubo, inwebu yentloko ibhityile, ngakumbi kulula ukuyigqobhoza kwindawo edlakadlaka, kwaye inobomi obufutshane.Yinto enokutyiwa.Ukuba i-membrane yonakalisiwe, kufuneka itshintshwe.
Ukushwankathela, indlela ye-membrane kukuba impazamo yokuchaneka ixhomekeke ekuphambukeni, ixesha lokulondoloza lifutshane, kwaye umsebenzi unzima kakhulu!
Kuthekani ngendlela ye-fluorescence?Ngenxa yomgaqo womzimba, i-oksijini isetyenziselwa kuphela njenge-catalyst ngexesha lenkqubo yokulinganisa, ngoko inkqubo yokulinganisa ngokusisiseko ikhululekile ekuphazamisekeni kwangaphandle!Ukuchaneka okuphezulu, ukugcinwa kwe-free, kunye neeprobes ezisemgangathweni zishiywe zingajongwanga iminyaka eyi-1-2 emva kofakelo.Ngaba indlela ye-fluorescence ngokwenene ayinaziphene?Ewe ikhona!
Ixesha lokuposa: Dec-15-2021