Institut F.A. Forel, University of Geneva, Route de Suisse 10, CH-1290 Versoix, Switzerland.
Sci Total Environ. 2009 Dec 1;407(24):6205-16. doi: 10.1016/j.scitotenv.2009.08.027. Epub 2009 Sep 22.
The processes leading to the attenuation of the antimony concentration in the water draining from the abandoned antimony mine in Goesdorf, Luxembourg, have been studied. Antimony has been mined in Goesdorf since Roman times from a stibnite-rich mesothermal vein system hosted in metasedimentary schist. The draining waters have pH values between 7 and 8 because the mineralization itself contains calcite and dolomite. This study combines the identification of minerals in the supergene zone with the application of bulk techniques (e.g., measurement of antimony in the waters of the adit and the creek draining the mine, sediment sequential extractions) over a period of five years. Antimony concentrations in the water that leaves the supergene zone are controlled by the dissolution of stibnite and the subsequent formation of Sb(III) oxides and sulphates. The relative proportions of the main secondary minerals can be qualitatively estimated as follows: 70% valentinite, 15% senarmontite and 12% sulphates (coquandite, klebelsbergite and peretaite). Further antimony attenuation along the adit and the creek that drain the mine waters is due partly to dilution, through mixing with waters that have not been in contact with the ore, and partly to sorption onto amorphous iron and manganese oxides present in the colluvial sediments.
对卢森堡戈斯多夫废弃锑矿排水中锑浓度衰减的过程进行了研究。自罗马时代以来，戈斯多夫就从富含辉锑矿的中温热液脉系统中开采辉锑矿，这些脉系统赋存于变质沉积片岩中。排水的 pH 值在 7 到 8 之间，因为矿化本身含有方解石和白云石。本研究将表生带矿物的鉴定与常规技术（例如，测量矿道和矿溪水中的锑、沉积物顺序提取）相结合，历时五年。离开表生带的水中的锑浓度受辉锑矿的溶解以及随后形成的 Sb(III)氧化物和硫酸盐的控制。主要次生矿物的相对比例可以定性估计如下：70%辉锑矿，15%砷锑矿和 12%硫酸盐（砷铅矿、水砷铅矿和磷氯铅矿）。由于与矿石未接触的水的稀释以及在冲积沉积物中存在的无定形铁和锰氧化物的吸附，矿道和矿溪中的锑进一步衰减。
