ALL libraries (COBIB.SI union bibliographic/catalogue database)
-
Aparat in metoda za določevanje reaktivnosti kalcita. Del. 2, Analiza negativnega vrha pH krivulje z uporabo SEM in EDX tehnike opazovanjaZidar, MartinV začetnem časovnem obdobju testa reaktivnosti kalcita, ko merimo pH vrednost v odvisnosti od časa med dodajanjem raztopine žveplove kisline v suspenzijo apnenčeve moke z raztopljenimi Al3+ in F- ... ioni, se določi pH krivulja z značilnim negativnim vrhom, ki opisuje zmanjšanje hitrosti raztapljanja CaCO3.Fenomen smo preučevali s SEM posnetki in EDX analizo površine ter z merjenjem površinskega naboja suspendirane apnenčeve moke. SEM posnetki so pokazali, da je površina apnenčeve moke pokrita s finimi delci samo v obdobju določitve negativnega vrha pH krivulje, ko je hitrost raztapljanja CaCO3 najnižja. Fini delci, ki so v velikostnem razredu med 0,1 m - 0,3 m, so sestavljeni iz kalcija, fluora, aluminija, ogljika in kisika. V času raztapljanja pred in po določitvi negativnega vrha, delcev na površini apnenčeve moke nismo opazili. Z EDX analizo smo ugotovili, da se poleg razmerja med kalcijem in fluorom, na površini spreminjanja tudi razmerje med ogljikom in kisikom. Površinski naboj apnenčeve moke je bil določen po vzpostavitvi termodinamskega ravnotežja v suspenziji. Naboj je negativen in nižji v primerjavi s površinskim nabojem apnenčeve moke suspendirane v destilirani vodi. Ugotovili smo, da je oblika pH krivulje primerno merilo za določevanje razvoja pojava AlFx fenomena (začetek pojava, maksimalno izražen pojav, konec pojava), ker globina in širina negativnega vrha pH krivulje opisujeta spremembo hitrosti raztapljanja CaCO3 zaradi tvorjenja delcev na površini apnenčeve moke. Pri enaki začetni sestavi raztopine je ta določena z vrsto in kvaliteto apnenčeve moke. S pričujočo študijo smo potrdili primernostvpeljave kvantitativnega merila-globina karakterističnega negativnega vrha pH krivulje, za validacijo primernosti apnenčeve moke pri posebnih pogojih razžveplanja dimnih plinov po mokrem kalcitnem postopku.Source: Slovenski kemijski dnevi 2008, Maribor, 25. in 26. september 2008 [Elektronski vir] : [zbornik referatov] ([11 str.])Type of material - conference contributionPublish date - 2008Language - slovenianCOBISS.SI-ID - 30425861
Author
Zidar, Martin
Topics
kalciti |
razžveplanje dimnih plinov |
aparati |
AIF |
kompleksi |
CaCO3 |
reaktivnost
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|---|
Zidar, Martin | 14919 |
Source: Personal bibliographies
and: SICRIS
Select pickup location:
Material pickup by post
Delivery address:
Address is missing from the member's data.
The address retrieval service is currently unavailable, please try again.
By clicking the "OK" button, you will confirm the pickup location selected above and complete the reservation process.
By clicking the "OK" button, you will confirm the above pickup location and delivery address, and complete the reservation process.
By clicking the "OK" button, you will confirm the address selected above and complete the reservation process.
Notification
Automatic login and reservation service currently not available. You can reserve the material on the Biblos portal or try again here later.
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
Pickup location | Material status | Reservation |
---|
Reservation in progress
Please wait a moment.
Reservation was successful.
Reservation failed.
Reservation...
Membership card:
Pickup location: