期刊
CHEMOSPHERE
卷 61, 期 4, 页码 585-588出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2005.02.059
关键词
reductant; ascorbic acid; oxalic acid; cysteine
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据