Development of polyacrylamide compositions, filled with clinoptilolite rocks for adsorption treatment of water from petroleum products
Abstract
The article is devoted to the problem of development of inexpensive and ecologically safe organomineral petroleum sorbents on the basis of industrial water-soluble polymer filled with clinoptilolite rocks of the largest in Russia Kholinsk and Shivirtuy deposits. The prospect of using zeolites as fillers is explained by their nanoporous structure, mechanical and thermal stability, availability, and also by excellent sorption
properties. The choice of polyacrylamide is due to its coagulation properties and wide application for wastewater treatment. The purpose of this work is the synthesis and study of composite materials based on polyacrylamide and clinoptilolite rocks with improved sorption properties in relation to petroleum products.
Aqueous solutions of polyacrylamide were filled with highly disperse mechanoactivated clinoptilolite rocks by stirring for 10 minutes on a magnetic stirrer. Films were obtained by watering on glass and polypropylene substrates and further removal of the solvent at 25 ° C. Probable types of interaction of active sites, taking into account the quasi-chemical model of water vapor sorption, have been proposed. Complexation through intermolecular hydrogen bonds involving the functional groups of the polymer, silanol groups of clinoptilolite and water molecules was confirmed by infrared spectroscopy, differential scanning calorimetry and thermogravimetry. The heterogeneous structure of the samples was studied by optical microscopy. It has been established that clinoptilolite rocks exhibit structural activity with respect to the polyacrylamide matrix. The presence of a network structure and a complex relief in the investigated samples of polymer compositesis shown. The Coates-Redfern method was used to calculate the order of thermolysis of polyacrylamide films obtained from the initial and filled 0.2 wt. % clinoptilolite rocks of aqueous solutions of 4 g / 100 cm3 and effective activation energies in the temperature range from 100 to 500 оС. It was found that the maximum expert estimates and the prospect of use in cleaning model sea water from oil and diesel fuel showed a sample
obtained on the basis of 4 g / 100 cm3 of polyacrylamide and 0.2 % of the clinoptilolite rocks of the Shivirtuy deposit.
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