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Trace elements migrating from tailings to rock varnish laminated sediments in an old mining region from Nelson,Nevada,USA

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International Journal of Sediment Research 2022年第2期37卷 202-213页

作者： Douglas B.Sims Amanda C.Hudson John E.Keller michael Strange Andressa Cristhy Buch David Ferrari giavanna m.fernandez Juan Garcia-Hernandez Bailey D.Kesl Sean Torres Department of Physical Sciences College of Southern Nevada University of Nevada Fluminense Federal University

The dispersion and influence of soluble and particulate trace elements(TEs) present in the materials from abandoned mines is an imminent problem on terrestrial and aquatic *** goal of this research is to provide a broader view of such transport,assessing particle size distribution and TE interactions(e.g.,scavenging) with mine tailings and locally derived sediments transported by water in arid *** grains from wash sediment were collected from a dry ephemeral wash in Nelson,Nevada where the Techatticup mine and mill worked between 1850 and *** were evaluated to determine the association and behavior of certain metals and metalloids including aluminum,arsenic,barium,cadmium,copper,chromium,iron,manganese,lead,selenium,vanadium,and zinc to rock varnish laminated *** show that some metals and metalloids were more concentrated on larger particles whereas others indicated the opposite *** example,As was greatest on silt fractions and least on coarse fractions,while Se was detected only on ***,Cu,Fe,mn,Pb,and Zn concentrations all increased with decreasing particle size(silt> sand> coarse),whereas Al,Ba,and V showed the opposite trend(silt ment factor(EF) of Cu,Zn,Pb,As,and Se were lower in mine tailing sediment treated with wash than those obtained for source *** in treated wash sediment samples,the high EFs of Ba,Cr,V,and mn suggested a possible greater affinity of these metals to the Al,Fe,and mn oxides from the RV *** data found in this study show that transport of contaminated sediments in arid regions could lead to the enrichment of some TEs in downgradient areas from source materials.

关键词： Adsorption metals metalloids mine tailings Particle size Transport

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