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http://dx.doi.org/10.11001/jksww.2022.36.3.177

Comparison of the characteristics of Al(III) hydrolyzed species by improved ferron assay test  

Yoon, Mihyoung (Department of Environmental Engineering, Pukyong National University)
Kang, Limseok (Department of Environmental Engineering, Pukyong National University)
Publication Information
Journal of Korean Society of Water and Wastewater / v.36, no.3, 2022 , pp. 177-186 More about this Journal
Abstract
In this study, newly improved Ferron assay test haved on timed spectrometry was used for the determination of hyolrolytic Al species presented in PACl coagulant. The color development reagent ferron was prepared by using conventional method and two newly developed methods. Then the ferron assay test was used to compare and analyze the distribution of Al(III) hydrolyzed species presented in the prepared PACl and alum. The preparing method of reagent A required an aging period of 7 days by adding a hydroxylamine hydroxide and a 1,10-phenanthroline monohydrate reagent, whereas the preparing method of reagent B was used as a coloring agent immediately without aging time. The regression analysis between UV absorbance and Al concentrations of conventional method and newly developed method of ferron reagents in low-concentration aluminum solutions and high-concentration aluminum solutions, showed the correlation coefficients of 0.999 or higher, as showing high correlations of conventional method and newly developed method. Applying Ferron assay test, Al species in the PACls and alum were classified as Ala(monomeric Al), Alb (polymeric Al), and Alc (colloidal and precipitated Al). Distribution of Al(III) hydrolyzed species according to the preparation of ferron colorimetric reagents was similar.
Keywords
Ferron assay; Coagulant; PACl; Hydrolyzed Al species;
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