Geochemistry of trace metals in a fresh water sediment : Field results and diagenetic modeling

TLDR: Pore water and sediment analyses indicate a shift in trace metal speciation from oxide-bound to sulfide-bound over the upper 20 cm of the sediment, and sensitivity analyses show that increased bioturbation and sulfate availability, expected upon restoration of estuarine conditions in the lake, should increase the sulfide bound fractions of Zn and Ni in the sediments.

About: This article is published in Science of The Total Environment.The article was published on 2007-08-01 and is currently open access. It has received 93 citations till now. The article focuses on the topics: Trace metal & Bioirrigation.

Figures

Fig. 4. The mean concentrations of Zn (◆), Pb (×), Ni (▼), and Cd (■) in suspended particulate matter (SPM) from monthly measurements between 2000–2004 (source: Rijkswaterstaat, www.waterbase.nl) versus total concentrations in the upper 2 cm of sediment (average of 3 samples). The error bars represent one standard deviation of the SPM values. A solid line represents the 1:1 relation; note the log scales.

Fig. 3. Pore water ion activity products (IAP) with respect to end-member metal monosulfides for Fe (a), Co (b), and Ni (c). IAP is defined as {Me2+} {HS−}/{H+} and values are calculated using visual MINTEQ with pore water data from late-summer (□) and spring (△). Vertical lines represent correspondingmetal sulfide solubilities (LogKso) for the reactionMeS(s)+H +=Me2++HS−. Values for FeS (s) determined by Davison et al. (1999; −3.0, solid line), Benning et al. (2000;−3.9, dotted line), andWolthers (Wolthers et al., 2005;−2.1, dash-dot line). The LogKso values for CoS (s) andNiS (s) are obtained from Dyrssen and Kremling (1990; CoS=−7.4; NiS=−5.6). Solutions are super-saturated when the Log IAP value is greater than the Log Kso.

Table 2 Calculated degree of pyritization (DOP), Degree of Sulfidization (DOS), and degree of trace metal pyritization (DTMP) a from sediment collected in late-summer

Table 5 The net rates of ZnS precipitation, Ni adsorption to Fe-sulfides, and release to the overlying water, increased bioturbation intensity (Db0) and deeper biotur

Fig. 1. The sampling location in Haringvliet Lake. The inset map shows the Rhine–Meuse river complex flows into the lake from the east, and the lake

Table 1 Depth weighted average concentrations of organic carbon (Corg), Ca, Al, Fe, with grain size

Frequently asked questions

Q1. What have the authors contributed in "Geochemistry of trace metals in a fresh water sediment: field results and diagenetic modeling" ?

Canavan et al. this paper measured trace metal concentrations in pore water and sediment of a coastal fresh water lake ( Haringvliet Lake, The Netherlands ).