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One of the modern environmental problems is the growing contamination of natural water reservoirs with heavy metals (hereinafter referred to as HMs). Drinking water with excess content of HMs is the cause of diseases in humans and animals [1, 2]. Contamination of water facilities with HMs is due primarily to the discharge of non-treated or insufficiently treated wastewater from industrial enterprises into reservoirs. The largest pollutants of water reservoirs with HMs are electroplating production, chemical and petrochemical industry, machine engineering, metallurgy, typography, mining [3, 4]. The contamination of natural waters with HMs is contributed to by the intensive use of mineral fertilizers and plant protection products in agriculture [5]. The non-treated food production drains, albeit to a lesser extent, but are also sources of contamination of natural water facilities with HMs [6]. The source of HMs’ arrival in the environment and reservoirs may be excess active sludge and sediment from biological wastewater treatment facilities. They accumulate HMs. Such waste should be disposed of by burying it in slag storage, by thermal or thermochemical treatment. However, in practice, there is still its immediate discharge to agricultural lands. The negative consequence of such activities is the contamination of soils and groundwater with HMs [1]. The technique to purify natural or wastewater from HMs is chosen depending on their amount and chemical THE KINETICS OF THE PROCESSES OF EXTRACTING THE CU(II) AND FE(III) IONS FROM AQUEOUS SOLUTIONS BY THE BIOSORBENTS BASED ON PEA PROCESSING WASTE

The kinetics of the processes of extracting the Cu(II) and Fe(III) ions from aqueous solutions by the biosorbents based on pea processing waste