Study of the processes of binding of chlorophenolic compounds in high-moor peat in the european north of Russia

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Abstract

The study of the processes of sorption of various chlorophenolic compounds from aqueous solutions by high-moor peat and products of its sequential disassembly was carried out. Compounds with different degrees of chlorine substitution were used as model chlorophenolic compounds: 2,4-dichlorophenol, 2,4,6-trichlorophenol, and pentachlorophenol. According to the results of chromatographic determination, it was established that the degree of binding of chlorophenolic compounds by the studied materials increases in the series: pentachlorophenol (10.9–15.5 μg/g peat, or 31.4–44.7%)–2,4,6-trichlorophenol (16.3–26.3 μg/g peat, or 47.6–76.7%)–2,4-dichlorophenol (19.6–34.6 μg/g peat, or 56.8–100%). An increase in the pH medium leads to an increase in the degree of dissociation of chlorophenolic compounds and their mobility, and ultimately to a decrease in the degree of their binding. The effect of pH is most pronounced for 2,4-dichlorophenol, which is characterized by the maximum pKa value.

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About the authors

I. N. Zubov

Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences

Author for correspondence.
Email: zubov.ivan@fciarctic.ru
Russian Federation, Arkhangelsk

E. S. Kolpakova

Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences

Email: kolpelen@yandex.ru
Russian Federation, Arkhangelsk

A. V. Velyamidova

Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences

Email: allavel@yandex.ru
Russian Federation, Arkhangelsk

A. S. Orlov

Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences

Email: alseror@yandex.ru
Russian Federation, Arkhangelsk

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Supplementary files

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2. Fig. 1. Effect of pH on the relative binding of 2,4-DCP by the studied materials.

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3. Fig. 2. Effect of pH on the relative binding of 2,4,6-TCP by the studied materials.

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4. Fig. 3. Effect of pH on the relative binding of PCP by the studied materials.

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