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СОРБЦИЯ СУЛЬФАНИЛОВОЙ КИСЛОТЫ И ИОНОВ МЕДИ АКТИВИРОВАННЫМ УГЛЕМ, МОДИФИЦИРОВАННЫМ ОКСИДАМИ МЕТАЛЛОВ

СОРБЦИЯ СУЛЬФАНИЛОВОЙ КИСЛОТЫ И ИОНОВ МЕДИ АКТИВИРОВАННЫМ УГЛЕМ, МОДИФИЦИРОВАННЫМ ОКСИДАМИ МЕТАЛЛОВ

Abstract

The possibility of using activated carbon brand Filtrasorb 300 modified with metal oxides (F300 M) in comparison with unmodified (F300 H) for the simultaneous extraction of organic com-pounds and copper ions from water has been established. A solution of metal chloride obtained by acid-thermal activation of waste from alumina production "red mud" is used as a modifier. The process of sulfanilic acid and copper ions sorption by modified and unmodified activated carbon Filtrasorb 300 (AC F300) is investigated. The structural-sorption characteristics of the studied materials, such as: static exchange cationic and anionic capacities and the number of surface groups (carboxyl, lactone, phenolic), are determined. Positive effect of activated carbon modification by metal oxides that has been obtained as a result of acid-thermal treatment of “red mud” is shown. The presence of negatively charged active centers on modified activated carbon surface makes it possible to increase by 59 % the value of sulfanilic acid adsorption due to the interaction of the ma-terial surface with –NH2 group of the acid with the absence of copper ions in the solution, which is 24 % more than AB F300. Simultaneous presence of copper ions and sulfanilic acid reduces their adsorption on the modified sorbent as a result of blocking the active groups and reducing the electrostatic interaction. Taking into account the complex nature of physical-chemical interactions in a system that contains sulfanilic acid with acidic and basic groups, and the competing effect under certain conditions, it can be expected that the modification of activated carbon with a metal chloride solution (obtained by acidic activation of alumina production wastes with their subsequent conversion to oxide form), is a promising direction in water treatment in case of containing both organic compounds and non-ferrous metal ions.

Исследован процесс сорбции сульфаниловой кислоты и ионов меди модифицированным и немодифицированным активированным углем Filtrasorb 300 (АУ F300). Определены структурно-сорбционные характеристики исследованных материалов: статическая обменная катион-ная и анионная емкости и количество поверхностных групп (карбоксильные, лактонные, фенольные). Показан положительный эффект модификации активированного угля оксидами металлов, полученными в результате кислотно-термической обработки «красного шлама». Наличие отрицательно заряженных активных центров на поверхности модифицированного активированного угля позволяет повысить на 59 % величину адсорбции сульфаниловой кислоты за счет взаимодействия поверхности материала с аминогруппой кислоты при отсутствии ионов меди в растворе, что на 24 % больше, чем на АВ F300. Одновременное присутствие ионов меди и сульфаниловой кислоты уменьшает их адсорбцию на модифицированном сорбенте в результате блокировки активных групп и снижения электростатического взаимодействия. Установлено, что при низких значениях рН среды имеет место, вероятнее всего, комплексообразование ионов меди с молекулой сульфаниловой кислоты по группе – NH2, при условии значительного превышения содержания ионов меди в растворе. Подтверждена возможность использования модифицированного оксидами металлов активированного угля марки Fil-trasorb 300 для извлечения из воды сульфаниловой кислоты и ионов меди.

Keywords

очистка воды, sorption; modified activated carbon; structural-sorption characteristics; sulfanilic acid; copper ions; water treatment., сорбция; модифицированный активированный уголь; структурно-сорбционные характеристики; сульфаниловая кислота; ионы меди; водоочистка

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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