Umqedazwe we-covid-19 ukhulise ukuqwashisa umphakathi ngokubulala amagciwane e-UV, okubuye kubonakale enanini elandayo lemikhiqizo esekwe ku-LED emakethe. Ukukhanya kwe-Ultraviolet kungasetshenziselwa ukubulala amagciwane emoyeni, amanzi kanye nezindawo zezinto ezahlukahlukene. I-International ultraviolet Association (iuva) ithi ingasiza ekwehliseni ubungozi bokudlulisa igciwane le-covid-19. Ukukhanya kwe-Ultraviolet kuhlukaniswe izigaba eziningana (Umfanekiso 1). I-UV-A noma ukukhanya okumnyama kusuka ku-315 kuya ku-400 nm futhi isetshenziswa ezinhlelweni ezifana nokuhlola ukuzinza kokukhanya, ukuphulukisa, i-phototherapy, izinto ezixosha izinambuzane nemibhede yokushukwa kwesikhumba. Ukuchayeka isikhathi eside ku-UV-A kungaholela ekushukeni kwesikhumba nokuguga ngaphambi kwesikhathi.Umfanekiso 1 ukukhanya kwe-ultraviolet kuhlukaniswe izigaba eziningana.

I-UV-B ebangeni lamaza angama-280 ~ 315 nm iyingozi. Ngenxa yokuthi ukuchayeka isikhathi eside ku-UV-B kuhlobene nokuvela komdlavuza wesikhumba, ukuguga kwesikhumba kanye ne-cataract, izicelo zezentengiselwano zihlanganisa ukugcinwa kanye ne-phototherapy emithini.Ubude be-waveleng ebangeni le-200 ~ 280nm yi-UV-C. Leli bhande le-UV alihlangene nomdlavuza wesikhumba ngoba ama-photon awangeni ajule esikhunjeni, kodwa ngokocwaningo lwe-iuva, ukuchayeka ku-UV-C kungabangela ukungakhululeki kwesikhumba njengokusha okukhulu futhi kulimaze i-retina yamehlo. Ama-photon e-UV-C angaphinde ahlanganyele nama-molecule e-RNA kanye ne-DNA emagciwaneni amancane ukuze awabhubhise ngempumelelo. Amalambu omhwamuko e-Mercury angakhipha i-UV-C asetshenziselwe ukubulala amagciwane amashumi eminyaka. Kodwa-ke, njengezinye izinhlobo zokukhanyisa, baye bashintshela emikhiqizweni esebenzisa imithombo yokukhanya ye-LED.

Ochwepheshe bezempilo bakholelwa ukuthi indlela eyinhloko yokudluliselwa kwe-covid-19 iwukuthintana namaconsi okuphefumula emoyeni noma ngaphezulu kwezinto. Okwamanje etholakalayo inzalo esekwe nge-LED kanye nemikhiqizo yokubulala amagciwane isetshenziselwa ikakhulukazi ukubulala amagciwane. Ngokunwetshwa kwalezi zimakethe zemishini, izinhlelo ezithuthuke kakhulu zokubulala amagciwane ngokunokwenzeka zizokwethulwa. Imikhiqizo etholakalayo inezinzuzo zokufaneleka kwezinye izinhlobo zokukhanyisa kwe-LED: usayizi omncane, ukuhlanganiswa okulula namanye amadivaysi njengezinzwa zokuba khona, nezidingo zokusetshenziswa kwamandla okuphansi. Kodwa-ke, le mikhiqizo ivame ukubiza kakhulu, futhi kuzoba nemikhawulo eyengeziwe kububanzi bezindawo ezingaphezulu ezingacutshungulwa ngesikhathi sangempela.

Ukugxila kokuqala kokushintshela kuma-LED kwaba ukuncipha okukhulu kwempilo ye-LED uma kuqhathaniswa nezibani ezikhona ze-mercury vapor. Kodwa-ke, lokhu kukhathazeka kusekelwe ekuhlolweni kokusebenza okuqhubekayo ezisetshenziswa zendabuko ezifana nezinhlelo zokuhlanza ezivaliwe, futhi akunaki ukuthi imikhiqizo ebulala amagciwane ingasetshenziswa (futhi ngezinye izikhathi kufanele) isetshenziswe ngezikhathi ezithile. Njengawo wonke ama-LED, ama-LED e-UV-C angajikeleza cishe unomphela ngaphandle kokuthikameze kabi ukuphuma kokukhanya; Ngaphezu kwalokho, isibani se-mercury vapor sidinga imizuzu embalwa yesikhathi sokushisa ngaphambi kokufinyelela ekukhanyeni okuphezulu okukhiphayo, futhi imikhiqizo ye-LED ingacishe ifinyelele izinga eliphelele lokukhipha ngokuphazima kweso. Ngaphezu kwalokho, ngokungafani nezibani ze-mercury vapor, imikhiqizo esekelwe eholwa ingahlinzeka kuphela ubude begagasi obudingekayo ukuze kube nemiphumela engcono kakhulu ngaphandle kokumosha amandla ngendlela yamaza angavumelekile.

Ngokuvamile, enye inkinga yemikhiqizo yokukhanyisa inzalo ukuqinisekiswa kokuphepha komkhiqizo kanye nezidingo zokusebenza. Ngokuka-Carl Bloomfield, umqondisi womhlaba wonke wengqalasizinda yebhizinisi ebhizinisini likagesi lase-Intertek, ukuhlolwa komkhiqizo wabo kugxile kumingcele yokukhanya, ukuqinisekiswa kwesitatimende sokuvala inzalo, ukuthobela ukuphepha, kanye ne-EMC esebenzayo. Ama-ejensi okuthuthukiswa kwamazinga aseqalile ukuhlola amazinga, kodwa amazinga akakabi khona, ngakho-ke i-Intertek incike embonini yayo kanye nobuchwepheshe bayo bezobuchwepheshe ukuklama izivumelwano zokuhlola zemikhiqizo ethile kanye nezicelo ezihlosiwe. Ukuthobela ukuphepha kungaba nzima kakhulu ngoba kuncike emkhiqizweni nasekusetshenzisweni kwawo okuhlosiwe, okuhlanganisa umlilo, ukushaqeka kukagesi, ubungozi bomshini, izingozi zamehlo, ukuphuma kwe-UV kanye nokukhishwa kwe-ozone.

Ngokungeziwe emikhiqizweni yokubulala amagciwane e-UV, kunochungechunge olusha lomkhiqizo olubizwa nge-"visible light disinfection (VLD)". Le mikhiqizo isebenzisa ubude beza beza be-indigo (blue purple) obukhishwa ama-LED, okuphephile ukuthi umzimba womuntu uvezwe kuwo isikhathi eside, ukuze iqhubeke nokuqeda amagciwane azwelayo kulawa maza.Imikhiqizo ye-VLD ivamise ukufakwa endaweni njengengxenye ukusetshenziswa kokukhanyisa unomphela, futhi ngezinye izikhathi kusetshenziswa ngokuhambisana nemithombo yokukhanya emhlophe yokukhanyisa okuvamile. Kuyaqapheleka ukuthi ukukhishwa kwe-VLD amagciwane akusebenzi kuwo wonke amagciwane futhi akusebenzi ngokuphelele kumagciwane.