ИСТИНА

Heavy metals are very dangerous because they pollute the environment and, when they enter the human body, accumulate and affect the nervous and cardiovascular systems. The sources of such pollution are often metallurgical plants and engineering enterprises that dump waste into the nearest water bodies. Since the aquatic environment promotes active migration of ions, including heavy metals, an important solution is to prevent their further movement at this stage. The aim of the work was to obtain magnetic peat modified by humic acids of coal for water purification from Cu2+ and Ni2+ ions. A series of experiments on the sorption of Cu2+ and Ni2+ ions were conducted. It was found that when using a mixture of peat with highly aromatic humic substances (in particular, coal of the Sakhalinskiy humate brand) as a sorption center, the binding to Cu2+ ions increase. Two sorbents were obtained, one is magnetite particles immobilized on neutralized lowland peat, the second is the same product modified with a solution of coal humic substances. Both sorbents were characterized by XRD and SEM. In addition, a series of experiments on the purification of model solutions of copper and nickel of different concentrations was carried out. The sorption capacity of magnetite on lowland peat was 15 mg/g for copper and 12 mg/g for nickel. Modification with humic substances increased the sorption capacity from 15 mg/g to 30 mg/g when sorption of a solution containing Cu2+ ions, and from 12 mg/g to 16 mg/g when sorption of a solution containing Ni2+ ions. Magnetite particles themselves, on the basis of which the sorbents were obtained, were synthesized according to the method given in [1]. The presence of the product is confirmed by the data of X-ray phase analysis, and the sorption experiments were controlled by the ICP-AES method. Acknowledgements. This research was carried out within the framework of the state task “Ecology” (CITIS no. 122040600057-3).