Open AccessJournal Article
A Field Study of Factors that Affect Acid-Volatile Sulfide Concentrations
TLDR
In this article, the spatial variability of acid-volatile sulfide (AVS) and its influential factors were studied through regression analysis to explain the spatial distribution of AVS and to predict the variability of metal availability under changing conditions.Abstract:
The spatial variability of acid-volatile sulfide (AVS) and its influential factors were studied through regression analysis to explain the spatial distribution of AVS and to predict the variability of metal availability under changing conditions simply and effectively. The AVS equation is used to derive oxidation-reduction potential (Eh), sulfate-reducing bacteria (SRB), organic carbon (OC), and total sulfur (TS). The relationships of these variables with AVS were then analyzed. Moreover, their effect on AVS was quantified through linear regression (LR) and principal component regression (PCR). These two regression equations were analyzed using a histogram of residual values and by comparing mean relative error (MRE) and root-mean-square error (RMSE) values. LR (Model 1) and PCR (Model 2) models were established as well. The MRE and RMSE values in the PCR model were 21.9 and 25.9%, respectively. In terms of these values, the PCR model is more accurate than the LR model. Furthermore, its predictive results were more reasonable. In conclusion, the PCR model can be used to predict the AVS concentrations based on the OC, Eh, SRB, and TS values. This model simplifies and facilitates the evaluation of metal toxicity under field conditions and can thus be used to manage sediments contaminated with metals.read more
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Bjørn-Helge Mevik,Ron Wehrens +1 more
TL;DR: The pls package implements principal component regression (PCR) and partial least squares regression (PLSR) in R and is freely available from the Comprehensive R Archive Network (CRAN), licensed under the GNU General Public License (GPL).
Journal ArticleDOI
Toxicity of cadmium in sediments: the role of acid volatile sulfide
Dominic M. Di Toro,John D. Mahony,David J. Hansen,K. John Scott,Michael B. Hicks,Suzanne M. Mayr,Michele S. Redmond +6 more
TL;DR: In this paper, it was shown that acid volatile sulfide (AVS) is the sediment phase that determines the LC50 for cadmium in the marine sediments tested.
Journal ArticleDOI
Chemical influences on trace metal-sulfide interactions in anoxic sediments
John W. Morse,George W. Luther +1 more
TL;DR: A considerable body of observational data has accumulated that indicates very different behavior for various trace metals in sulfidic sediments as mentioned in this paper, but also reflect differences in ligand exchange reaction kinetics, and redox reaction pathways.
Journal ArticleDOI
Acid volatile sulfide (AVS)
David Rickard,John W. Morse +1 more
TL;DR: In this paper, it was shown that acid volatile sulfide (AVS) is not equivalent to FeS and solid FeS phases have rarely been identified in marine sediments.
Journal ArticleDOI
Analysis of acid-volatile sulfide (AVS) and simultaneously extracted metals (SEM) for the estimation of potential toxicity in aquatic sediments
TL;DR: In this article, a colorimetric method was used to detect acid-volatile sulfide (AVS) and simultaneously extracted metals (SEM) in aquatic sediments.