Cov qauv siv lead ua ntawm zeolite

Cov qauv siv lead ua ntawm zeolite tuaj yeem muab faib ua peb yam: (1) aluminosilicate skeleton, (2) pores thiab kab noj hniav uas muaj exchangeable cations M nyob rau hauv lub cev pob txha, (3) dej molecules nyob rau hauv lub peev xwm theem, uas yog, zeolite dej.
Cov qauv ntawm zeolite yog me ntsis txawv ntawm cov pob txha ntawm quartz thiab feldspar. Lub moj khaum ntawm quartz thiab feldspar yog nruj, nrog rau ib tug tshwj xeeb lub ntiajteb txawj nqus ntawm 2.6 ~ 2.7, thaum lub moj khaum qauv ntawm zeolite yog kuj sparse, nrog ib tug tshwj xeeb gravity ntawm 2.0~ 2.2. Lub cev qhuav dej tuaj yeem loj li 47%, xws li chabazite, lossis txawm tias 50%, xws li hluavtaws zeolite.
Hauv cov qauv feldspar, hlau cations raug kaw nyob rau hauv qhov khoob ntawm cov pob txha siv lead ua uas muaj O ions. Tshwj tsis yog cov siv lead ua puas lawm, nws nyuaj rau cov hlau cations txav mus los ywj siab. Kev hloov ntawm Na los yog K los ntawm Ca yuav tsum tau ua tib lub sij hawm raws li kev hloov ntawm Si thiab Al, uas yog, ib tug khub hloov, uas yuav inevitably ua rau ib tug hloov nyob rau hauv lub Si / AI piv.
Nyob rau hauv cov qauv zoo li feldspar, hlau cations nyob rau hauv kuj qhib interconnected qhov khoob nrog ib tug tshwj xeeb lub ntiajteb txawj nqus ntawm 2.14 ~ 2.45. Cov cations tuaj yeem sib pauv nrog ib leeg los ntawm cov txheej txheem txheej txheem yam tsis muaj kev puas tsuaj rau cov pob txha siv lead ua. Sodalite thiab hydronepheline ib zaug tau suav tias yog cov zaub mov ntawm pawg zeolite.
Nyob rau hauv cov qauv zeolite, hlau cations nyob nruab nrab ntawm qhov loj dua interconnected pores los yog kab noj hniav nyob rau hauv cov qauv siv lead ua. Yog li ntawd, cations tuaj yeem hloov pauv dawb los ntawm qhov pores yam tsis muaj kev cuam tshuam rau nws cov pob txha siv lead ua. Kev sib pauv xws li 2(Na,K)(Ca2+) yooj yim tshwm sim hauv zeolites, tab sis tsis nyob rau hauv feldspars. Daim ntawv sib pauv no, tej zaum yog ib hom kev sib pauv ion heev, tsuas yog siv rau zeolites thiab cov zaub mov zoo sib xws.
Kev sib txuas ntawm zeolite dej molecules, lub molecules ions thiab exchangeable hlau cations feem ntau xoob thiab tsis muaj zog. Cov dej molecules no tuaj yeem txav mus rau hauv thiab tawm ntawm qhov hws ntau dua li cations. Nyob rau hauv kev cuam tshuam ntawm tshav kub, nws tuaj yeem ua kom ywj pheej thiab txuas nrog yam tsis muaj kev cuam tshuam rau nws lub cev pob txha.