The assessment of water pollution by chemical reaction products from the activities of industrial facilities: Numerical study

Issakhov A. Alimbek A. Zhandaulet Y.
1 February 2021 Elsevier Ltd

Journal of Cleaner Production
2021 #282

Water pollution incidents have occurred frequently and have caused serious damage in recent years. The purpose of this study is to create a model for modeling the spatio-temporal water pollution from the activities of industrial facilities. In this study, a water pollution diffusion modeling system was developed. An example is the pollution of the Ilek River in the city of Aktobe, Kazakhstan, where two-dimensional non-stationary numerical modeling is applied with a detailed mechanism of a chemical reaction. The chemical reaction is numerically investigated by solving the equations of mass conservation, momentum and chemical concentration in flow. The results show that pollutants move downstream with an increase in the area of pollution, but with a reduced concentration. In addition, spatio-temporal changes in the concentration of pollutants show a tendency that the concentration in certain regions stagnates, reaching a certain level. It was also revealed in the work that, despite the fact that the emitted element HNO₂ does not exceed the threshold limit value (TLV) value, the obtained products from the chemical reaction (HNO₃, HCl) exceed the TLV value several times and cause great harm to the flora and fauna of the aquatic environment. Numerical results for two-dimensional mass transfer with a chemical reaction are presented under different river flow conditions. The model provides a reliable tool for detailed investigation of the complex interaction of flow and chemical composition.

Chemical reaction , Jet in crossflow , Reynolds averaged Navier-Stokes (RANS) , Thermal dispersion , Threshold limit value (TLV)

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al-Farabi Kazakh National University, Almaty, Kazakhstan
Kazakh British Technical University, Almaty, Kazakhstan

al-Farabi Kazakh National University
Kazakh British Technical University

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