Дослідження різних типів модифікації і каталітичних властивостей базальтового туфу та вивчення його можливостей щодо очищення стічних вод

• Datum: 2014
• 1. Verfasser: Tsymbalyuk, V. V.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2014
• Schlagworte: базальтовий туф; хімічне та термічне модифікування; адсорбент; каталітична активність; інгібітор корозії
• Online Zugang: https://www.cpts.com.ua/index.php/cpts/article/view/296
• Назва журналу: Chemistry, Physics and Technology of Surface

Mineralogical and chemical composition of basaltic tuff from Polytske-2 have been examined, the best ways considered to modify BT. The influence of temperature modification on the structure, phase composition, porosity, specific surface area value has been studied. The optimum temperature of modification is 250–400 °C. The best chemical modifiers are found to be solutions of inorganic acids: HNO3, H3PO4, H2SO4. Acid treatment of BT is specific, its effectiveness depends on the type of acid; in the processing oxide phases are washed from the BT surface, thus increasing surface defectiveness SiO2/Al2O3 ratio, and total content of acid centers. Catalytic activity of the samples of thermally modified BT in model hydrogen peroxide decomposition reaction in 1.6–3 times, and chemically modified samples in 1.2–4.5 times greater than that of the natural form of BT. It has been found that basaltic tuff can be used as a corrosion inhibitor of metals. In 5 % NaCl solution with the addition of BT, corrosion slowly decreases in time a dependent on its content.