Migration of acidic groundwater seepage from uranium-tailings impoundments. I. Field study and conceptual hydrogeochemical model

被引：56

作者：

Morin, K.A. ^{[1
]}

Cherry, J.A. ^{[1
]}

Dave, N.K. ^{[1
]}

Lim, T.P. ^{[1
]}

Vivyurka, A.J. ^{[1
]}

机构：

[1] Morwijk Enterprises, Vancouver, BC V6G 1Y6, Canada

来源：

Journal of Contaminant Hydrology | 1988年 / 2卷 / 04期

关键词：

GEOCHEMISTRY - Groundwater - HYDROLOGY - URANIUM MINES AND MINING - Waste Disposal - URANIUM ORE TREATMENT - Tailings Disposal;

D O I：

10.1016/0169-7722(88)90008-3

中图分类号：

学科分类号：

摘要：

Results of the field study indicate the seepage can be divided into three hydrochemical zones: (1) the inner core, which is essentially unaltered, acidic seepage from the tailings; (2) the neutralization zone, in which inner-core water is neutralized and aqueous concentrations decrease significantly; and (3) the outer zone, whch contains both neutralized water from the neutralization zone and pH-neutral process water from the uranium milling operation. The main features of the conceptual model are solid-liquid interactions, particularly mineral precipitation-dissolution, and buffering effects of dominant aqueous species. The important minerals undergoing precipitation-dissolution are the calcite-siderite solid solution, gypsum, Al-OH minerals, and Fe-OH minerals. 'Cell and streamtube' calculations are used to evaluate the general trends in aqueous concentrations and to assist in explaining observed migration rates.

引用

页码：271 / 303