Journal ArticleDOI
Speciation of aqueous chromium(VI) solutions with the aid of Q-mode factor analysis followed by oblique projection.
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The composition of the Cr(VI) equilibria was estimated from the UV-vis spectra of dilute potassium dichromate solutions, without any prior knowledge of the quantities of pure components, with the aid of Imbrie Q-mode factor analysis (Q-mode FA) followed by Varimax rotation and Imbries oblique projection.About:
This article is published in Talanta.The article was published on 2000-11-01. It has received 51 citations till now. The article focuses on the topics: Chromic acid & Chromium.read more
Citations
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Does the presence of microplastics influence the acute toxicity of chromium(VI) to early juveniles of the common goby (Pomatoschistus microps)? A study with juveniles from two wild estuarine populations
TL;DR: The results of this study indicate toxicological interactions between MP and Cr(VI) highlighting the importance of further investigating the combined effects of MP and other common contaminants.
Journal ArticleDOI
Statistical analysis of hydrographs and water-table fluctuation to estimate groundwater recharge
TL;DR: Using water-table monitoring data from the National Groundwater Monitoring Network in Korea, groundwater hydrographs were classified into five typical groups and a modified water table fluctuation (WTF) method was developed from the relation between the cumulative WTF and corresponding precipitation records as discussed by the authors.
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Discrimination of management effects on soil parameters by using principal component analysis: a multivariate analysis case study
Marcelo M. Sena,Rosa Toyoko Shiraishi Frighetto,Pedro José Valarini,H. Tokeshi,Ronei J. Poppi +4 more
TL;DR: In this article, a multivariate study was carried out in three farms from Guaira, State of Sao Paulo, Brazil using principal component analysis (PCA) to distinguish the areas as a function of the soil management and determine which are the most important parameters to characterize them.
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Silane-modified halloysite/Fe3O4 nanocomposites: Simultaneous removal of Cr(VI) and Sb(V) and positive effects of Cr(VI) on Sb(V) adsorption
TL;DR: In this paper, a new adsorbents were successfully prepared by in-situ growing Fe3O4 nanoparticles on halloysite nanotubes (HNTs) followed by subsequent modification with silane coupling agents.
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Effect of ph on rejection of hexavalent chromium by nanofiltration
M. Muthukrishnan,B.K. Guha +1 more
TL;DR: The role of feed solution pH for membrane separation of hexavalent chromium has been explained with the help of this spectrograph as mentioned in this paper, which has shown that the variation of rejection at different pH is due to the nature of ionic component present at the specific pH.
References
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Book
Statistics and data analysis in geology
TL;DR: In this article, a thoroughly revised edition presents important methods in the quantitative analysis of geologic data, such as probability, nonparametric statistics, and Fourier analysis, as well as data analysis methods such as the semivariogram and the process of kriging.
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PARAFAC. Tutorial and applications
TL;DR: The multi-way decomposition method PARAFAC is a generalization of PCA to higher order arrays, but some of the characteristics of the method are quite different from the ordinary two-way case.
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Evolving factor analysis for the resolution of overlapping chromatographic peaks
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Analysis of different modes of factor analysis as least squares fit problems
Pentti Paatero,Unto Tapper +1 more
TL;DR: It is shown that each mode of principal component analysis or ‘factor analysis’ is equivalent to solving a certain least squares problem where certain error estimators σ ij are assumed for the measured data matrix X ij and the best posssible scaling and a near-optimal scaling are introduced.