Organic ligand induced release of vanadium from the dissolution of stone coal oxide ore

被引:3
作者
Hu, Xingyun [1 ]
Yue, Yuyan [2 ]
Peng, Xianjia [1 ,3 ]
机构
[1] Chinese Acad Sci, Natl Engn Lab Ind Wastewater Treatment, Beijing Key Lab Ind Wastewater Treatment & Resour, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
[2] Henan Normal Univ, Sch Environm, Xinxiang 453007, Henan, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
Vanadium; Stone coal; Dissolved organic matters; Kinetics; Dissolution; Complexation; AQUATIC HUMIC SUBSTANCES; COORDINATION CHEMISTRY; ACID; SOIL; COMPLEXATION; VANADATE; KINETICS; METALS; RATES; EPR;
D O I
10.1007/s11356-017-0342-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The effects of low-molecular-weight dissolved organic matters (LMWDOMs) on the release of vanadium (V) under environmental conditions are part of a broader study on the environmental geochemistry behavior of V. Eight typical naturally occurring LMWDOMs with carboxyl, hydroxyl, and amidogen groups were chosen: citric acid, oxalic acid, EDTA, salicylic acid, catechol, glycine, cysteine, and glucose. The results showed that the release of V was largely promoted by LMWDOMs with carboxyl functional groups under acidic conditions and with catechol under basic conditions. In the presence of citric acid, oxalic acid, or EDTA at pH 4.0, the initial release rates of V were approximately 25-39 times greater than the rates in the control experiments; the steady release rates were 164, 95, and 49 times than the rates in the control experiments, respectively. For catechol, the release rate at pH 8.0 was approximately 20 times the rate at pH 4.0. Amino acids and alcohols had a minimal effect on the release of V. Ligand-promoted release rates of V were found primarily due to the faster detachment of surface complexes, the protonated sites from the mineral surface and the reduction of dissolved V (V) in the presence of citric acid, oxalic acid, EDTA, and catechol. This study helps understand the pollution risk of V in some mine areas and the fate of V in the environment.
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页码:17891 / 17900
页数:10
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