xov xwm

Lub ntsiab tseem ceeb ntawm lub ntiaj teb diatomaceous ua tus cab kuj yog SiO2. Piv txwv li, lub active tivthaiv ntawm industrial vanadium catalyst yog V2O5, tus txhawb nqa yog alkali hlau sulfate, thiab cov cab kuj yog refined diatomaceous ntiaj teb. Cov kev sim qhia tias SiO2 muaj kev ruaj ntseg ntawm cov khoom siv, thiab nws ntxiv dag zog nrog kev nce ntawm K2O lossis Na2O cov ntsiab lus. Cov kev ua ntawm cov catalyst kuj muaj feem xyuam rau lub dispersion pore qauv ntawm carr

yog. Tom qab diatomite raug kho nrog cov kua qaub, cov ntsiab lus oxide impurity raug txo, SiO2 cov ntsiab lus tau nce, thiab cov cheeb tsam tshwj xeeb thiab qhov pore ntim kuj nce ntxiv. Yog li ntawd, cov nyhuv ntawm cov khoom siv refined diatomite zoo dua li ntawm ntuj diatomite.

Diatomaceous ntiaj teb feem ntau yog tsim los ntawm cov seem ntawm silicate tom qab kev tuag ntawm ib leeg-celled algae collectively hu ua diatoms, thiab nws essence yog dej-muaj amorphous SiO2. Diatoms tuaj yeem muaj sia nyob hauv dej tshiab thiab dej ntsev. Muaj ntau hom diatoms. Feem ntau, lawv tuaj yeem muab faib ua "central order" diatoms thiab "pinnacle order" diatoms. Nyob rau hauv txhua qhov kev txiav txim, muaj ntau ntau "genus", uas yog heev complex.

Lub ntsiab tseem ceeb ntawm lub ntiaj teb diatomaceous yog SiO2, cov khoom zoo yog xim dawb, thiab cov ntsiab lus ntawm SiO2 feem ntau tshaj 70%. Monomer diatoms tsis muaj xim thiab pob tshab. Cov xim ntawm lub ntiaj teb diatomaceous nyob ntawm cov av nplaum ntxhia thiab cov organic teeb meem. Cov muaj pes tsawg leeg ntawm diatoms ntawm cov pob zeb hauv av sib txawv yog txawv.

Diatomaceous ntiaj teb yog fossilized diatomaceous ntiaj teb deposit tsim tom qab tuag ntawm ib leeg-celled nroj tsuag hu ua diatom tom qab ib tug accumulator lub sij hawm ntawm txog 10,000 mus rau 20,000 xyoo. Diatoms yog ib qho ntawm thawj protists tshwm sim hauv ntiaj teb, nyob hauv dej hiav txwv lossis dej pas dej. Nws yog lub diatom no uas muab cov pa oxygen rau lub ntiaj teb los ntawm photosynthesis thiab txhawb kev yug me nyuam ntawm tib neeg, tsiaj txhu thiab nroj tsuag.