Investigation of sorption materials forthe purification of drainage and waste water from rice irrigation systems

Abstract

The purpose of the study is the selection of sorption materials for the purification of drainage and waste water from the Sarpinsky irrigation and watering system. The Republic of Kalmykia is one of the driest regions of Russia. The shortage of water resources is observed almost throughout the whole territory of the republic, so the existing irrigation areas are partially used. Over the past decades, the area of crops, gross yields and rice yields in Kalmykia have significantly decreased. An analysis of the current ecological situation in the rice irrigation systems of the steppe part of the Sarpinsky lowland shows that 43% (3459 ha) of the total area of irrigated land (8031 ha) is in a satisfactory reclamation condition, and 57% (4572 ha) is in unsatisfactory for reasons of secondary salinization and alkalinization. To improve the ecological and reclamation state and further successful development of rice farming in the republic, it is necessary to develop technical solutions for the purification and desalination of drainage and waste water with the aim of their subsequent use for irrigation. For the selection of natural mineral sorbents, laboratory studies were conducted to study the static and dynamic capacity of sorbents, the most suitable complex of materials for waste water was developed. The approbation of sorbent mixtures under field conditions was carried out. Sorption materials were selected based on the results of the chemical analysis of filtered water, the sorption mechanism was also taken into account. Treatment of drainage and waste water will allow you to reuse this water, thereby saving water resources.