Graduation Year

2016

Date of Thesis Acceptance

Spring 5-11-2016

Major Department or Program

Geology

Advisor(s)

Bryn Kimball

Abstract

Historical mines were often unregulated and may release acidic, metal-rich water known as acid mine drainage (AMD) that results from the dissolution of metal sulfides. A common AMD remediation method is neutralization of pH. This causes precipitation of secondary iron hydroxide minerals and dissolved metals from solution. The stability of trace metal substituted (TMS) iron hydroxides is not well understood. This study investigates the mobility of trace metal ions, specifically cobalt, as it is substituted into the mineral structure of jarosite [KFe3(OH)6(SO4)2]. Leach experiments were conducted with synthesized pure and cobalt substituted jarosite. In addition, the character of water and precipitate samples from Blackbird Creek, a mining-affected, remediated stream in the Idaho Cobalt Belt are described. The goal of this work is to understand how cobalt substitution affects the stability of jarosite and to compare synthetic jarosite to that in sediments found at Blackbird Creek.

Page Count

41

Subject Headings

Jarosite, Cobalt, Metal ions-- Environmental aspects, Acid mine drainage, Idaho -- Blackbird Creek, Whitman College 2016 -- Dissertation collection -- Geology Department

Permanent URL

http://hdl.handle.net/10349/201608051288

Document Type

Whitman Community Accessible Thesis

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