Search for new affordable sorbents for protection of water reservoirs from pollution
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Дата
2025
Науковий керівник
Назва журналу
Номер ISSN
Назва тому
Видавець
КПІ ім. Ігоря Сікорського
Анотація
Pollution of water bodies in the world causes a growing need to find new, effective, selective, affordable and environmentally friendly sorbents for the removal of pollutants. Analysis of existing research emphasizes the importance of developing both highly effective and cheap, non-toxic and easily renewable sorbents. Natural materials, such as lignocellulosic sorbents (e.g. sawdust) and mineral ones, are promising in this regard. Among these natural materials, sawdust has its advantages as a waste of the woodworking industry, which makes its use convenient and economically profitable. Natural raw materials do not always have the desired sorption properties. However, they can be improved by modifying the surface with various functional groups. Research and development of methods for purifying water bodies from heavy metals, such as copper, are particularly important, since this metal can pollute natural water resources through industrial use and, as a result, accumulate over time in the body. To date, the use of modified lignocellulosic sorbents, in particular pine sawdust, for water purification from heavy metals has not been sufficiently studied. In this regard, in the study, it was decided to study the sorption properties of pine sawdust modified with urea and ammonium phosphate, since these reagents are able to generate functional groups with nitrogen and phosphorus, which can retain d-metal ions, in particular copper. The process of modifying pine sawdust included the following stages: sawdust samples were filled with solutions of ammonium phosphate and urea of appropriate concentration, settled, dried in air, calcined in a drying oven, washed with hot distilled water to neutral pH and dried to constant mass. The sorption properties of modified sawdust were studied by determining the change in the concentration of a 2 mM copper (II) sulfate solution before and after sorption, and the concentration of Cu2+ ions was determined by the back titration method. Before titration, the pH of the solutions after sorption was also measured.
Опис
Ключові слова
water purification, sorption properties of pine sawdust, sawdust modification, modification with urea and ammonium phosphate, очистка водойм, сорбційні властивості соснової тирси, модифікація тирси, модифікація сечовиною та амоній фосфатом
Бібліографічний опис
Korobiy, D. Search for new affordable sorbents for protection of water reservoirs from pollution / Dmytro Korobiy, Oleksandr Khokhotva // Матеріали XХV Міжнародної науково-практичної конференції «Екологія. Людина. Суспільство» пам’яті д-ра Дмитра СТЕФАНИШИНА (12 червня 2025 р., м. Київ, Україна). – Київ : КПІ ім. Ігоря Сікорського, 2025. – С. 203-206. – Бібліогр.: 6 назв.