HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by La Force, M. J. Articles by Rosenzweig, R. F. Search for Related Content PubMed Articles by La Force, M. J. Articles by Rosenzweig, R. F. Agricola Articles by La Force, M. J. Articles by Rosenzweig, R. F.

Redistribution of Trace Elements from Contaminated Sediments of Lake Coeur d'Alene during Oxygenation

Dep. of Geological and Environmental Sciences, Stanford Univ., Palo Alto, CA 94305-2115;

R. Frank Rosenzweig

Dep. of Biological Sciences, Univ. of Idaho, Moscow, ID 83844-2339.

^* Corresponding author (lafo9442{at}uidaho.edu).

ABSTRACT

Sediments of Coeur d'Alene Lake in northern Idaho are contaminated with heavy metals as a result of mining in the Coeur d'Alene River basin. Dredging and disposal operations have been suggested as a possible means of environmental remediation; thus, detailed knowledge is required as to how sediment oxygenation can result in the redistribution of trace elements. To simulate changing physicochemical soil conditions, stirred batch experiments were conducted using fresh sediment core material retrieved from the lake. Fifty grams of sediment were added to 750 mL of double deionized water and mixed while being oxygenated for 260 h. The following parameters were monitored as a function of time: pH and E_h, contaminant trace-element release into the aqueous phase, and metal abundance within operationally defined fractions of the solid phase: magnesium chloride (exchangeable), sodium hypochlorite (organic), sodium acetate-acetic acid (carbonate), ammonium oxalate in the dark (non-crystalline), hydroxylamine hydrochloride (crystalline), and potassium perchlorate-hydrochloric-nitric acid (sulfidic) extractable sediment fractions. In all trials, levels of aqueous-phase Zn remained high throughout the simulations (6.60 mg L^–1) and were highly correlated (sigma value = 0.95) with Mn. Oxygenation and disturbance resulted in a shift in trace element partitioning from the sodium hypochlorite (organic) and potassium perchlorate-hydrochloric-nitric acid extractable (sulfidic) fractions into the ammonium oxalate in the dark (noncrystalline) extractable fraction. Overall, these results indicate that oxygenation and agitation of anaerobic sediment results in Zn release into solution with concomitant redistribution of trace elements in the solid-phase.

This article has been cited by other articles:

				C. Quantin, T. Becquer, J. H. Rouiller, and J. Berthelin Redistribution of Metals in a New Caledonia Ferralsol After Microbial Weathering Soil Sci. Soc. Am. J., November 1, 2002; 66(6): 1797 - 1804. [Abstract] [Full Text] [PDF]

				M. J. La Force, C. M. Hansel, and S. Fendorf Seasonal Transformations of Manganese in a Palustrine Emergent Wetland Soil Sci. Soc. Am. J., July 1, 2002; 66(4): 1377 - 1389. [Abstract] [Full Text] [PDF]

				M. J. La Force and S. Fendorf Solid-Phase Iron Characterization During Common Selective Sequential Extractions Soil Sci. Soc. Am. J., September 1, 2000; 64(5): 1608 - 1615. [Abstract] [Full Text]