TY - JOUR AU - Nurgain, A. AU - Nazhipkyzy, M. AU - Zhaparova, A. A. AU - Issanbekova, A. T. AU - Alfe, M. AU - Musina, A. S. PY - 2020/09/30 Y2 - 2024/03/28 TI - Acid Modification of Diatomite-Based Sorbents JF - Eurasian Chemico-Technological Journal JA - Eurasian Chem.-Technol. J. VL - 22 IS - 3 SE - Articles DO - 10.18321/ectj975 UR - https://ect-journal.kz/index.php/ectj/article/view/975 SP - 157-164 AB - <p>In this work, the effect of acid pre-treatment (hydrochloric acid, HCl) and calcination of diatomite, a silicon dioxide-material from natural sources, was studied with the aim to obtain diatomite-based sorbents with specific physicochemical properties. For this, acid pre-treatments with HCl at different calcination conditions, namely HCl concentration (0.5, 1 M) and calcination temperatures (from 600 to 900 °C) were studied. Morphological features different from those of natural diatomite were obtained. It has been found that treatment of diatomite with 0.5 M HCl at&nbsp;800 °C showed a specific pore volume of 0.008 cm<sup>3</sup>/g, and a specific surface area of 19.26 m<sup>2</sup>/g, while the treatment of diatomite with 1.0 M HCl showed a specific pore volume of 0.011cm<sup>3</sup>/g, and a specific surface area of 25.57 m<sup>2</sup>/g. The performance of the acid pretreatment of diatomite for adsorption of Pb ions from water was also studied.</p> ER -