Water model experimental design

The experimental design was devoted to study the sample treatment in order to develop a model to remove metals selectively from water using resins (3 factors were considered)... 

POP) in the environment, that is, how the chemical in water will be taken up by animal and vegetable life and by soils and sediments. This coefficient is also used as an indicator of chemical hydrophobicity in most quantitative structure-activity relationship (QSAR) models for designing new drugs (Franke, 1984). Experimental values of the octanol-water partition coefficient for the hydrophobic chemicals common in the chemical industry vary... 

The initial step in any experimental design is to define the independent variables that are to be considered. In this case Pd-Cu/AI-Mg-0 catalysts for the reduction of NO in gas flows with different contents of water vapour, propane, NO and CO was chosen as the reaction to be modelled. The minimum and maximum values of the independent variables of support preparation, active phase content and reaction conditions are given in Table 1. 

Not only solids, but many liquid systems also, have discontinuities in their properties over the factor space. Figure 10.1 shows a ternary mixture of water, an oil, and a surfactant. According to the proportions of the components, completely different phases are obtained and the methods of experimental design that we have seen so far, along with the polynomial or related models developed for then-analysis, are not suitable for analysis of the total system. For the experimental domain, it would be necessary to select a portion of the factor space with the same phase or phases over all of it. 

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