Journal
CHEMOSPHERE
Volume 61, Issue 4, Pages 585-588Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2005.02.059
Keywords
reductant; ascorbic acid; oxalic acid; cysteine
Categories
Ask authors/readers for more resources
In this work the effect of organic reducing reagents, namely, ascorbic acid, oxalic acid and L-cysteine on dissolution of commercial TiO2 has been investigated. Kinetic studies showed that a maximum of about 45% of TiO2 was dissolved by ascorbic acid in 4 h when oxide:acid molar ratio was kept at 1:2. The dissolution of TiO2 increased with increase in ascorbic acid and oxalic acid concentration up to 0.15 M in 4 h (corresponding to molar ratio of oxide to acid of 1: 3) and further addition did not affect the dissolution. Nearly 45% TiO2 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 TiO2 was enhanced to 60% in 2.5 h but when cysteine was added to ascorbic acid the dissolution was about 50% in just 1 h. (C) 2005 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available