Characteristic of Competitive Adsorption of Dimethoate with a Variety of Pollutants on Surficial Sediments through Fractional Factorial Design

Abstract:

In order to reveal the combined pollution characteristic of dimethoate adsorption onto the surficial sediments in pesticide (dimethoate, metalaxyl, atrazine, malathion, prometryn)/heavy metals (copper, zinc, lead, cadmium, nickel) composite contamination system, a completely foldover design and confounding design assisted resolution Ⅲ of 2^10-6 fractional factorial design method is used to identify the main effects and interactions of these ten pollution factors. The study found that the main effects of zinc, cadmium, malathion, prometryn have significant effect (α=0.05) to dimethoate adsorption on the sediment, in which zinc and cadmium will significantly antagonism to adsorption of dimethoate, while metalaxyl and prometryn will significantly collaborative to adsorption of dimethoate, and these main effects’ contribution rates are 64.4% and the second-order interaction effects’ contributions are 35.6%. According to the effect estimates of main effects and second-order interaction effects, zinc*prometryn and cadmium*atrazine have significantly antagonism to adsorption of dimethoate. Moreover, we also can estimate the compound pollution levels about the target pollutant on these main effects and second-order interaction effects of pollutant factors.

• Periodical: Advanced Materials Research (Volume 599)
• Pages: 467-471
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.599.467
• Online since: November 2012
• Authors: Meng Wang, Xiao Li Li, Yu Li
• Keywords: Composite Contamination, Dimethoate, Fractional Factorial Design, Heavy Metal, Pesticide, Surficial Sediments

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