Secondary arsenic minerals and arsenic mobility in a historical waste rock pile at Kaňk near Kutná Hora, Czech Republic
Secondary arsenic minerals and arsenic mobility in a historical waste rock pile at Kaňk near Kutná Hora, Czech Republic
复制标题
捷克共和国库特纳霍拉附近 Kaňk 历史岩石废料堆中的次生砷矿物和砷迁移率
作者：
E. Kocourková;J. Loun;O. Sracek;S. Houzar;J. Filip
库特纳霍拉（Kutná Hora）附近的Kak遗址的历史废石堆中的砷矿化经过了约500年的发展。本研究的目的是确定主要的次生砷矿物相及其环境稳定性。唯一常见的原生含砷矿物-毒砂-与石英、黄铁矿、闪锌矿和磁黄铁矿一起出现在库特纳霍拉贱金属存款的矿物组合中。大部分砷被束缚在表生矿物（臭葱石、黄钾铁矾-贝丹石、布可夫砷铜矿、皮提克石）中，这些矿物在矿堆中普遍存在的氧化条件下相对稳定。Katients k站点是bukovskelite，katients kite，zirkkaite和parascorodite的模式产地。从长期来看，从As结合的角度来看，最稳定的矿物似乎是臭葱石和贝丹石。较高的流动性被观察到作为纳入黄钾铁矾和不良结晶无定形相（FeIII -羟基氧化物，皮云母）。本研究尚未证实桩内砷的流动性显着和水渗透在一年中的补给期（冬末早春）不应动员砷在一个显着的速度。然而，需要监测桩周围环境中二次As相和溶解砷的稳定性，以避免将来砷从桩中迁移出来。
The arsenic mineralization in historical waste rock pile at Kaňk site near Kutná Hora developed over a period of about 500 years. The objective of this study was to determine principal secondary arsenic mineral phases and their environmental stability. The only common primary As-bearing mineral – arsenopyrite - occurs in the mineral assemblage of Kutná Hora base-metal deposit together with quartz, pyrite, sphalerite, and pyrrhotite. Most of arsenic is bound in supergene minerals (scorodite, jarosite-beudantite, bukovskýite, pitticite), which are relatively stable under oxidizing conditions prevailing in the pile. The Kaňk site is a type locality for bukovskýite, kaňkite, zýkaite, and parascorodite. In long-term perspective, the most stable minerals from viewpoint of As-binding appear to be scorodite and beudantite. A higher mobility was observed for As incorporated into jarosite and poorly crystalline to amorphous phases (FeIII -oxyhydroxides, pitticite). This study has not confirmed significant mobility of arsenic within the pile and water infiltrating in recharge periods of the year (late winter-early spring) should not mobilize arsenic at a significant rate. However, monitoring of the stability of secondary As-phases and dissolved arsenic in the environment around the pile is required to avoid future migration of arsenic out of the pile.
布科夫斯基矿 Fe-2(AsO4)(SO4)(OH)中心点 9H(2)O 的晶体结构、热力学性质和共生
影响因子：
0.7
作者：
J. Majzlan;B. Lazic;T. Armbruster;M.B. Johnson;M.A. White;R.A. Fisher;J. Plášil;J. Loun;R. Škoda;M. Novák
通讯作者：
M. Novák