Document Detail

Dissolution studies on TiO2 with organics.
MedLine Citation:
PMID:  16202813     Owner:  NLM     Status:  MEDLINE    
In this work the effect of organic reducing reagents, namely, ascorbic acid, oxalic acid and L-cysteine on dissolution of commercial TiO(2) has been investigated. Kinetic studies showed that a maximum of about 45% of TiO(2) was dissolved by ascorbic acid in 4h when oxide:acid molar ratio was kept at 1:2. The dissolution of TiO(2) increased with increase in ascorbic acid and oxalic acid concentration up to 0.15M in 4h (corresponding to molar ratio of oxide to acid of 1:3) and further addition did not affect the dissolution. Nearly 45% TiO(2) dissolution was obtained with ascorbic acid alone while oxalic acid yielded 40% dissolution. When oxalic acid was added along with ascorbic acid in equi-molar concentrations, dissolution of TiO(2) was enhanced to 60% in 2.5h but when cysteine was added to ascorbic acid the dissolution was about 50% in just 1h.
Amitava Mukherjee; Ashok M Raichur; Jayant M Modak
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Publication Detail:
Type:  Journal Article     Date:  2005-04-14
Journal Detail:
Title:  Chemosphere     Volume:  61     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-10-05     Completed Date:  2006-03-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  585-8     Citation Subset:  IM    
Department of Metallurgy, Indian Institute of Science, Bangalore 560012, India.
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MeSH Terms
Ascorbic Acid / chemistry*
Cysteine / chemistry*
Oxalic Acid / chemistry*
Titanium / chemistry*
Reg. No./Substance:
13463-67-7/titanium dioxide; 144-62-7/Oxalic Acid; 50-81-7/Ascorbic Acid; 52-90-4/Cysteine; 7440-32-6/Titanium

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