UDC

622.882 (470.11)

Authors

Nakvasina Elena Nikolaevna
Forestry Engineering Institute, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: e.nakvasina@narfu.ru
Zemtsovskaya Ol’ga Nikolaevna
Forestry Engineering Institute, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: zemcovskayaolga@gmail.com
Denisova Anastasiya Ivanovna
Institute of Oil and Gas, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: a.i.denisova@narfu.ru

Abstract

The problem of the increasing number of industrial waste and disposal is relevant in the Arkhangelsk region. The paper covers the aspects of the company “Severalmaz” waste recycling (refinement tailings of diamond processing) to create bedrock for the derelict lands recultivation. Saponite, included in waste of diamond mining, is a high-magnesia douk with the bentonite properties and other unique characteristics, such as a high physico-chemical activity, hydrophilicity, swelling and increased soil moisture capacity. The authors consider the agrophysical and agrochemical properties of bedrocks based on peat with varied proportion of saponite-containing refinement tailings in the test area of the Institute of Oil and Gas in the zone of the Lomonosov mining and concentration complex (Primorsky district of the Arkhangelsk region). The saponite-containing refinement tailings have an effect on the agrophysical and agrochemical properties of the turfy substrate. The refinement tailings addition to the bedrock increases the density of a solid body. Calcium and magnesium saturated refinement tailings have an alkalizing effect on the acid turfy substrate. The refinement tailings addition allows increasing a low density of the bedrock composition and stabilizing the water-air regime of substrates. Their moisture-binding capacity allows providing a stable balance of a liquid phase in the substrates of different assay of refinement tailings. The reaction of the medium, density of composition and total pore space are the most significant factors of the substrate assessment. They are characterized by a high authentic correlation with the share of refinement tailings. Studying the properties of substrates based on peat-saponite mixtures will pick the best composition options for plant growth.

Keywords

saponite, refinement tailings, turfy substrate, recultivation

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