Matlock Matthew M, Howerton Brock S, Atwood David A
Department of Chemistry, The University of Kentucky, Lexington 40506-0055, USA.
Water Res. 2002 Nov;36(19):4757-64. doi: 10.1016/s0043-1354(02)00149-5.
The 1,3-benzenediamidoethanethiol dianion (BDET, known commercially as MetX) has been developed to selectively and irreversibly bind soft heavy metals from aqueous solution. In the present study BDET was found to remove > 90% of several toxic or problematic metals from AMD samples taken from an abandoned mine in Pikeville, Kentucky. The concentrations of metals such as iron, may be reduced at pH 4.5 from 194 ppm to below 0.009 ppm. The formation of stoichiomietric BDET-metal precipitates in this process was confirmed using X-ray powder diffraction (XRD), proton nuclear magnetic resonance (1H NMR), and infrared spectroscopy (IR).
1,3 - 苯二氨基乙硫醇二价阴离子（BDET，商业上称为MetX）已被开发用于从水溶液中选择性且不可逆地结合软重金属。在本研究中，发现BDET能从肯塔基州派克维尔一个废弃矿井采集的酸性矿山排水（AMD）样品中去除超过90%的几种有毒或有问题的金属。在pH值为4.5时，铁等金属的浓度可从194 ppm降至0.009 ppm以下。在此过程中，通过X射线粉末衍射（XRD）、质子核磁共振（1H NMR）和红外光谱（IR）证实了化学计量比的BDET - 金属沉淀物的形成。
