Study of porous phospho-gypsum composites and their properties on the basis of nostochiometric interpolymer complexes

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SCIENCE AND INNOVATION 
INTERNATIONAL SCIENTIFIC JOURNAL VOLUME 2 ISSUE 3 MARCH 2023 
UIF-2022: 8.2 | ISSN: 2181-3337 | SCIENTISTS.UZ 
44
STUDY OF POROUS PHOSPHO-GYPSUM COMPOSITES AND 
THEIR PROPERTIES ON THE BASIS OF 
NOSTOCHIOMETRIC INTERPOLYMER COMPLEXES 
Komilov Kamaridin Urinovich 
Associate professor of the "Chemistry" department of Chirchik state pedagogical university 
https://doi.org/10.5281/zenodo.7712952
 
Abstract. 
The possibility of using bulk waste of the chemical industry - phosphogypsum as 
a useful resource is considered. The results of scientific research and practical experience 
convincingly proved the technical feasibility and feasibility of using phosphogypsum in the 
national economy instead of traditional types of natural raw materials. A brief description of 
phosphogypsum, promising areas for its processing, and some statistics are presented. 
The article is about the use of chemical ameliorant based on phosphogypsum for 
effective feedingin various soil and climatic zones for cereals, vegetables, industrial and other 
crops, to increase the yield of cotton and the technological quality of its fiber. That the use of 
phosphogypsum as a chemical ameliorant improves the chemical, physical and water-physical 
properties of saline soils. 
Keywords: 
phosphogypsum, chemical ameliorant, chemical reclamation, salinization, 
gypsum, calcium dihydrate, interpolymer complex, composite material. 
 
Introduction. 
The rapid pace of development of industry, energy, metallurgy, 
metalworking, chemical, petrochemical and other industries, as well as areas of engineering, 
construction and household activities entail the inevitable generation and accumulation of 
industrial waste on a global scale. And one of the main types of waste is waste from the chemical 
industry. 
So, in the production of mineral fertilizers, various types of waste are generated, among 
which phosphogypsum is a waste of the production of phosphate fertilizers [2]. It should be noted 
that at present, a significant layer of problems of a geoecological nature is generally observed, 
associated primarily with extensive forms of environmental management, environmental 
degradation for various reasons [3; 4], including the irrational management of many sectors of 
nature management [5]. 
Currently, there are more than 60 million tons of phosphogypsum in the dumps of 
Ammofos-Maxam OJSC and its amount continues to increase annually (in terms of calcium 
dihydrate). The monitoring studies of the phosphogypsum dump located on the territory of the 
Almalyk Chemical Plant of Mineral Fertilizers of Ammofos-Maxam OJSC showed that stagnant 
phosphogypsum has the same chemical and phase composition. The chemical composition of 
phosphogypsum mainly contains oxides of calcium, sulfur and silicon with an admixture of oxides 
of iron, aluminum, magnesium, phosphorus, sodium and others. As can be seen from the table, the 
mass fraction of the main substance (CaSO4 ∙ 2H2O) in terms of dry dihydrate is 97%, the mass 
fraction of hygroscopic moisture is 16.4%, the content of water-soluble fluoride compounds in 
terms of fluorine is 0.12%. Impurities of toxic compounds of cadmium, arsenic,