Comparative evaluation of a reagent based on various сatalysts used for wastewater treatment

A comparative assessment of various catalysts for ferrite formation during wastewater treatment is considered. Obtaining optimal parameters of time and volume of a substance to reduce the concentration of chemical elements to the maximum permissible concentration.

Introduction. The ecological situation in our country at this point in time is considered unsatisfactory. Air pollution occurs due to large amounts of emissions from industrial plants; rivers and lakes are polluted by emissions of industrial, livestock and domestic wastewater. A known reagent method for wastewater treatment is ferritization or the formation of oxypheres. This method is well used for industrial plants such as paint and varnish, woodworking, metal production, etc. There is ferrite formation on several catalysts, such as ferrous sulfate, copper sulfate, so there is a need to conduct an experiment to study various catalysts to determine the best one for the absorption of chemical impurities.

Object. The object of the study is highly contaminated wastewater.

Materials and methods. A chemical analytical analysis of the wastewater under study was performed to determine the concentration of heavy metals. Next, experiments were carried out with various catalysts in laboratory conditions by settling at different periods of time and the volume of ferrite formation suspension.

Results and conclusions. The best result was shown by a catalyst in the form of iron sulfate, in which the ferrite formation reaction proceeded faster than with aluminum oxide and copper sulfate. The settling was carried out at intervals of 0.3 to 4 hours, the volume of the suspension used was from 20 to 50 ml. With these parameters, it was found that the contact time of the catalyst with the wastewater under study was 2 hours, the amount of suspension was 50 ml. Removal of chemical impurities ranged from 90 to 100%. Comparative data is aimed at identifying a faster catalyst for ferrite formation, as well as removing impurities to the maximum permissible concentration. Experimental data are aimed at reducing the environmental load of water bodies into which wastewater is discharged.

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