ДИСПЕРСНОСТЬ И МОРФОЛОГИЯ ГИДРОЗОЛЯ ДИОКСИДА ТИТАНА

Hydrous titanium dioxide has been obtained by hydrolysis of titanium tetrachloride in aqueous solution both with and without alcohol. Method of atomic force microscopy has been used in order to investigate morphology of air dried samples of  hydrous titanium dioxide. The paper shows  formation of conglomerates in case of hydrolysis without addition of isobutyl alcohol. According to turbidimetric data particle radius of hydrosol has varied in the suspension within the range of (135 ± 5) nm that is in good correlation with atomic force microscopy data. Гидратированный диоксид титана получен гидролизом тетрахлорида титана в водной среде как в присутствии спирта, так и без него. Методом атомно-силовой микроскопии изучена морфология высушенных на воздухе образцов гидратированного диоксида титана. Показано образование конгломератов в случае проведения гидролиза без добавления изобутилового спирта. По данным турбидиметрии, радиус частиц гидрозоля в суспензии изменялся в пределах (135 ± 5) нм, что находится в хорошей корреляции с данными атомно-силовой микроскопии

DISPERSIBILITY AND MORPHOLOGY OF TITANIUM DIOXIDE HYDROSOLS

Hydrous titanium dioxide has been obtained by hydrolysis of titanium tetrachloride in aqueous solution both with and without alcohol. Method of atomic force microscopy has been used in order to investigate morphology of air dried samples of  hydrous titanium dioxide. The paper shows  formation of conglomerates in case of hydrolysis without addition of isobutyl alcohol. According to turbidimetric data particle radius of hydrosol has varied in the suspension within the range of (135 ± 5) nm that is in good correlation with atomic force microscopy data

REGENERATING OF SILVER OUT OF FIXING AND BLEACHING-FIXING SOLUTIONS

The article is dedicated to study of the process of silver extraction out of fixing liquors by means of metal-exchange. There is shown that silver concentration in liquor is descended depending on the confusion time and mass of concentrator

CARBONATE-SILICATE SORBENT FROM INDUSTRIAL WASTE

Samples of granulated carbonate-silicate sorbent were obtained from industrial waste, the sorption capacity for Cu2+ ions was evaluated on model water solutions of copper sulfate. The maximum value of the static sorption capacity was determined to be 12.5 mg/g

Obtaining of the Calcium Silicate-Based Adsorbent with Use of Tecnogenic Waste

Выполнен синтез гранулированного сорбента на основе силиката кальция из отхода техногенного происхождения, такого как карбонатный шлам водоподготовки и мелкодисперсного (менее 20 мкм) гранитного отсева. Проведена оценка его сорбционной способности по отношению к ионам Cu2+ из модельных водных растворов сульфата меди. В результате найдено, что частицы сорбента дисперсностью менее 1 мм имеют статическую сорбционную емкость равную 9,6 мг/г, а размером 1-5 мм - емкость 4,0 мг/г.The synthesis of granular sorbent based on the calcium silicate was carried out from the technogenic/industrial waste, such as carbonate sludge of water treatment plants and fine (lower than 20 mm) granite sifting residues. Its adsorption capability for the Cu2+ ions from the model aqueous solutions of copper sulfate was measured. As a result it was found that sorbent particles of the fraction lower than 1 mm have such static sorption capability as 9.6 mg/g, and the fraction of 1-5 mm - the capability of 4.0 mg/g