Hybrid sorbents — meliorants for recultivation of arsenic-contaminated soils

Arsenic is one of the chemical elements present in low concentrations in almost all environmental components. At the same time, arsenic is not among the trace elements necessary for the normal functioning of living organisms. A real threat to ecosystems is the content of arsenic in soils in a mobile form. The presence of arsenic in a mobile form can lead to an increase in the area of contamination, primarily due to the high probability of penetration into groundwater. This paper presents the results of model testing of hybrid sorbents — meliorants in relation to the immobilization of the water-soluble form of arsenic are presented. The following series of studied sorbents according to the efficiency of arsenic adsorption was formed: peat/diatomite/vermiculite with different amounts of hydrated iron(III) oxide > peat/ diatomite/vermiculite > peat/diatomite/water treatment sludge > water treatment sludge. It has been established that the individual use of water treatment sludge as a sorbent or in a mixture with other substances provides a 50% or more reduction in the arsenic content in the initial solution. The remediation potential of water treatment sludge can be enhanced by combined use with such substances of natural origin as peat and diatomite.

Apakashev R. A., Lebzin M. S., Yurak V. V., Malyshev A. N. Hybrid sorbents — meliorants for recultivation of arsenic-contaminated soils. MIAB. Mining Inf. Anal. Bull. 2022;(111):18—28. [In Russ]. DOI: 10.25018/0236_1493_2022_111_0_18.

This work has been supported by the grants the Russian Science Foundation, RSF № 22−24−20102, https://rscf.ru/project/22−24−20102/ with the financial support of the Government of the Sverdlovsk region.

Apakashev R. A.¹, Dr. Sci. (Chem.), Professor, e-mail: Apakashev.R@m.ursmu.ru; ORCID: 0000-0002-9006-3667;
Lebzin M. S.¹, Junior researcher of the research laboratory, e-mail: az_ma@mail.ru, ORCID: 0000-0001-5959-135X;
Yurak V. V.¹, Cand. Sci. (Econ.), Associate professor, e-mail: vera_yurak@mail.ru; ORCID: 0000-0003-1529-3865;
Malyshev A. N.¹, Laboratory assistant-researcher, e-mail: malyshev.k1b@gmail.com, ORCID: 0000-0002-3104-1687;
¹ Ural State Mining University, Russia, Yekaterinburg, str. Kuibyshev, 30, 620144.

Apakashev R. A., e-mail: Apakashev.R@m.ursmu.ru.

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