Preparation and Study of Carbon-Mineral Sorbents Based on Novogorod Sapropel. Part 1

Abstract

Comprehensive decontamination of natural and waste waters from various chemical pollutants is a critical problem so that the development of new sorbents has high scientific and practical value. Heat treatment of sapropel—bentonite-clay mixtures could produce a bifunctional carbon-mineral sorbent that acted simultaneously as a sorbent for polar and nonpolar species. IR spectroscopy, elemental analysis, and combined thermal analysis (TG-DSC/DTA) found that the sapropel organic component was practically completely removed at carbonization temperatures 600 and 700°C. The release of volatile products gave the sorbent a porous structure and also altered the surface composition and properties. Mixtures carbonized at these temperatures had comparable amounts of organic and inorganic components.