Extraction of Pb2+ Ions By Sodium Aluminosilicates Synthesized From Rice Straw

Abstract

Samples of sodium aluminosilicates obtained by hydrolytic deposition using rice straw of different varieties as silicon-containing raw materials were studied. The morphology of the particles was determined by scanning electron microscopy, the specific surface area (362–470 m2/g) was measured, IR spectra were recorded, and the chemical and phase composition of the samples was determined. The sorption properties of the obtained materials with respect to lead ions have been studied, the sorption capacity is 199–550 mg/g. An organic component was found and isolated in the samples, which is formed as a result of the deposition of aluminosilicates from rice straw hydrolysates, its composition was determined by thermogravimetry and IR spectroscopy. The effect of the organic component on the sorption capacity of plant-derived aluminosilicates has been investigated. The proposed sorption mechanism has been established. The approach used makes it possible to obtain aluminosilicates with a high sorption capacity, as well as safely dispose of rice straw.