Spatial variation and fractionation of bed sediment-borne copper, zinc, lead, and cadmium in a stream system affected by acid mine drainage

Lu, Wenzhou and Ma, Yingqun and Lin, Chuxia (2012) Spatial variation and fractionation of bed sediment-borne copper, zinc, lead, and cadmium in a stream system affected by acid mine drainage. Soil and Sediment Contamination, 21 (7). pp. 831-849. ISSN 1532-0383

Abstract

An investigation was conducted to examine the spatial variation and fractionation of bed sediment-borne Cu, Zn, Pb, and Cd in a stream system affected by acid mine drainage. The pH had a major control on the spatial variation pattern of soluble, exchangeable, and carbonate-bound Cu, Zn, and Cd. There was a prominent concentration peak of carbonate-bound, oxide-bound, and organic-bound metals at the 29 km station, as controlled by the abundance of organic C, carbonate C, and oxides of manganese and iron. In general, the residual fraction was the dominant form for all four investigated metals. It was likely that oxide-Mn played a more important role in binding Zn and Cd than oxide-Fe did. In contrast, Cu had a higher affinity for iron hydrous oxides than for manganese oxide. Pb had a higher affinity for oxides of iron and manganese than for carbonates and organic matter. The presence of organic-bound metals in both the acidic upstream reach and non-acidic downstream reach suggests that the binding of these metals by organic matter was not markedly affected by pH, while the correspondence of organic C peak and organic-bound metal peaks at the 29 km station indicates a strong control by organic matter abundance on the quantity of organic-complexed metals.


Statistics for USQ ePrint 22047
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published Version restricted access in accordance with the copyright policy of the publisher (Taylor & Francis)
Depositing User: Dr Chuxia Lin
Faculty / Department / School: Current - USQ Other
Date Deposited: 05 Oct 2012 07:22
Last Modified: 03 Jul 2013 01:30
Uncontrolled Keywords: streambed sediment; acid mine drainage; heavy metals; metal fractionation; spatial variation; environmental impact
Fields of Research (FOR2008): 05 Environmental Sciences > 0503 Soil Sciences > 050304 Soil Chemistry (excl. Carbon Sequestration Science)
03 Chemical Sciences > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
04 Earth Sciences > 0403 Geology > 040310 Sedimentology
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961404 Mining Soils
Identification Number or DOI: doi: 10.1080/15320383.2012.697933
URI: http://eprints.usq.edu.au/id/eprint/22047

Actions (login required)

View Item Archive Repository Staff Only