Organic ligand-induced dissolution kinetics of antimony trioxide
文献类型：期刊论文
| 作者 | He, Mengchang; Hu, Xingyun |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 56期号:0页码:87-94 |
| 关键词 | Antimony Pollution Antimony Trioxide Dissolution Organic Ligands |
| 英文摘要 | The influence of low-molecular-weight dissolved organic matter (LMWDOM) on the dissolution rate of Sb2O3 was investigated. Some representative LMWDOMs with carboxyl, hydroxyl, hydrosulfuryl and amidogen groups occurring naturally in the solution were chosen, namely oxalic acid, citric acid, tartaric acid, EDTA, salicylic acid, phthalandione, glycine, thiolactic acid, xylitol, glucose and catechol. These LMWDOMs were dissolved in inert buffers at pH = 3.7, 6.6 and 8.6 and added to powdered Sb2O3 in a stirred, thermostatted reactor (25 degrees C). The addition of EDTA, tartaric acid, thiolactic acid, citric acid and oxalic acid solutions at pH 3.7 and catechol at pH 8.6 increased the rate of release of antimony. In the 10 mmol/L thiolactic acid solution, up to 97% by mass of the antimony was released after 120 min reaction. There was no effect on the dissolution of Sb2O3 for the other ligands. A weak correlation between dissolution rate with the dissociation constant of ligands and the stability of the dissolved complex was also found. All the results showed that the extent of the promoting effect of ligands on the dissolution of Sb2O3 was not determined by the stability of the dissolved complex, but by the dissociation constant of ligands and detachment rate of surface chelates from the mineral surface. This study can not only help in further understanding the effect of individual low-molecular-weight organic ligands, but also provides a reference to deduce the effect of natural organic matters with oxygen-bearing functional groups on the dissolution of antimony oxide minerals. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39536]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | He, Mengchang,Hu, Xingyun. Organic ligand-induced dissolution kinetics of antimony trioxide[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2017,56(0):87-94. |
| APA | He, Mengchang,&Hu, Xingyun.(2017).Organic ligand-induced dissolution kinetics of antimony trioxide.JOURNAL OF ENVIRONMENTAL SCIENCES,56(0),87-94. |
| MLA | He, Mengchang,et al."Organic ligand-induced dissolution kinetics of antimony trioxide".JOURNAL OF ENVIRONMENTAL SCIENCES 56.0(2017):87-94. |
入库方式： OAI收割
来源：生态环境研究中心
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