Оценка возможности применения терморасширенного графита для очистки загрязненных природных вод
Аннотация
В работе проведены исследования сорбционной способности терморасширенного графита (ТРГ), полученного из нитрата графита, соинтеркалированного этилформиатом и уксусной кислоты, по отношению к катионам тяжелых металлов, а также оценка возможности применения ТРГ для очистки загрязненных природных вод. На основе экспериментальных значений сорбционной емкости были получены изотермы адсорбции, для описания которых использовали модель Ленгмюра. Были определены предельные значения сорбционной емкости для катионов Cu2+, Mn2+, Zn2+, которые составляют 0,064, 0,029 и 0,089 г/г сорбента соответственно. Показано, что природа аниона не оказывает влияния на сорбцию тяжелых металлов из водных растворов их солей. С целью обоснования возможности применения ТРГ в качестве основы для сорбента при очистке загрязненных природных вод были проведены испытания исследуемого ТРГ на реальном объекте. Исследования проводили с использованием образца воды с высоким содержанием экотоксикантов из поверхностного источника, расположенного в г. Волгоград. После обработки воды исследуемым терморасширенным графитом концентрации экотоксикантов, в частности тяжелых металлов снижались до допустимых пределов. На основании полученных результатов можно сделать вывод о возможности применения полученного ТРГ в качестве сорбента для очистки природных и сточных вод от загрязняющих веществ и техногенных примесей.
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