Open AccessFabrication of composites based on modified vermiculite and study of their surface
Author(s) -
Н. П. Шапкин,
И. Г. Хальченко,
L. I. Sokolova,
А. Л. Шкуратов,
Valery I. Razov,
D.S. Gal’chenko,
Maria G. Smirnova,
Olga A. Apanasenko,
Svetlana A. Katkova
Publication year - 2019
Publication title -
butlerovskie soobŝeniâ
Language(s) - English
Resource type - Journals
ISSN - 2074-0212
DOI - 10.37952/roi-jbc-01/19-58-6-19
Subject(s) - vermiculite , sorption , materials science , adsorption , composite material , chemical engineering , desorption , crystallinity , sorbent , aluminosilicate , elution , polyethylene , chemistry , organic chemistry , chromatography , engineering , catalysis
Composites based on vermiculite with different modifiers, including hydroxides on the surface of vermiculite particles, have been fabricated. The composition and structure of the fabricated composites have been investigated by means of the methods of energy-dispersive analysis, X-ray diffraction analysis, and positron annihilation spectroscopy. The adsorption characteristics of the fabricated materials with respect to dye of different nature have been determined, and isotherms of low temperature nitrogen adsorption/ desorption have been obtained. It has been demonstrated that for different modifications the composites sorption properties change significantly in dependence on the modifier nature. At modification of layered natural aluminosilicates by cellulose and polyethylene, the surface nature depends largely on the modifier nature. At treatment by polyethylene, a dramatic decrease of the aluminosilicate surface area due to formation of a dense film takes place. The effect of cellulose is not so significant because of formation of a looser surface structure. The sorption characteristics somewhat improve upon further annealing. Good prospects of application of the fabricated sorbents for antibiotics sorption and analytical determination in food products have been demonstrated. Vermiculite, modified with 7% hydrochloric acid, demonstrates a high degree of absorption for chloramphenicol, tetracycline, ciprofloxacin and cefazolin antibiotics. The values of the degrees of absorption show: 73 %, > 99 %, > 99 % and 73 %, respectively. The degree of elution for chloramphenicol is more than 75 %, which allows you to create concentrated cartridges based on this sorbent. The degree of elution is low, which allows the use of a sorbent based on vermiculite for the treatment of waste and natural waters from these antibiotics.