Behavior of rare earth elements in acid coal mine drainage in Shanxi Province, China
Behavior of rare earth elements in acid coal mine drainage in Shanxi Province, China
复制标题
山西省酸性煤矿排水中稀土元素的行为
DOI：
10.1007/s12665-011-1497-7
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发表时间：
2012-09
影响因子：
2.8
通讯作者：
Li, Jingqin
中科院分区：
文献类型：
--
作者：
Sun, Hongfu;Zhao, Fenghua;Zhang, Meng;Li, Jingqin
对山西四台煤矿和马兰煤矿酸性矿井水、基岩、黄铁矿和煤样中稀土元素含量进行了测定。AMD显示高稀土元素浓度与典型的凸页岩归一化模式。基岩样品中的稀土元素浓度比黄铁矿和煤样中的稀土元素浓度高一个数量级。AMD中高含量的稀土元素很可能来自酸性溶液对基岩中稀土元素的淋溶。室内和野外实验结果表明，pH是控制稀土元素分馏的最重要因素，但Fe、Al、Mn胶体和次生矿物也影响稀土元素的分馏。当pH值从4增加到6时，总溶解REE的浓度从520 μg L− 1下降到0.875 μg L−1。AMD中Fe和Al对溶解态稀土元素分馏的影响小于低浓度Mn。HREE优先被次生矿物和胶体去除，其次是MREE。稀土元素形态模拟表明，硫酸盐络合物（LnSO 4+和Ln（SO 4）2-，79-91%）和游离态（Ln 3+，8.8-21%）是AMD中的主要稀土形态，但稀土-硫酸盐络合作用不能解释MREE富集模式。
Rare earth element (REE) concentrations were determined in acid mine drainage (AMD), bedrock, pyrite, and coal samples from the Sitai coal mine and the Malan coal mine in Shanxi province, China. The AMD displayed high REE concentrations with typical convex shale-normalized patterns. The REE concentrations in the bedrock samples are one order of magnitude higher than those found in pyrite and coal samples. The high REE concentrations in AMD most likely come from the acidic solution leached out REE in bedrock. Results from laboratory and field experiments show that pH is the most important factor controlling the fractionation of REE; but Fe, Al, and Mn colloids and secondary minerals also affects their fractionation. As the pH increased from 4 to 6, the concentrations of total dissolved REE decreased from 520 to 0.875 µg L−1. Fe and Al in AMD has less influence on the fractionation of dissolved REE than low concentrations of Mn. HREE were preferentially removed by secondary minerals and colloids, followed by MREE. Rare earth element’s speciation modeling indicates that sulfate complexes (LnSO4+and Ln(SO4)2−, 79–91%) and free-metal species (Ln3+, 8.8–21%) are the dominant REE species in the AMD, but the REE-sulfate complexation could not explain the MREE-enriched patterns.
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影响因子：
5.6
作者：
Ketris, M. P.;Yudovich, Ya. E.
通讯作者：
Yudovich, Ya. E.
影响因子：
5
作者：
MILLERO, FJ
通讯作者：
MILLERO, FJ
影响因子：
3.9
作者：
M. G. Serrano;Luis Francisco Auqué Sanz;D. Nordstrom
通讯作者：
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影响因子：
3.4
作者：
P. Verplanck;D. Nordstrom;H. Taylor;B. Kimball
通讯作者：
P. Verplanck;D. Nordstrom;H. Taylor;B. Kimball
影响因子：
5
作者：
Johannesson, KH;Zhou, XP
通讯作者：
Zhou, XP