Application of humic substances in the remediation of heavy-metal-polluted soils of the Subarctic Zone of the Kola Peninsula


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Abstract

The effect of humic substances of various origin on the behavior of heavy metals was investigated in a field model experiment on remediation of technogenic wastelands near the mining-metallurgical compplex Severonickel in the Subarctic Zone of the Kola Peninsula. Two distinct types of humates, coal and peat, were applied to the experimental sites in various doses and combinations with NPK fertilizer and lime. The combination of peat humates with lime proved the most effective for stabilizing heavy metals in a sixweek experiment. The application of coal humates in conditions of prolonged contamination, accompanied by suppression of vegetation and biota, is effective in small doses (0.5%) and, conversely, causes the mobilization of metals with an increase in humate concentration (1%).

About the authors

P. N. Tregubova

Department of Soil Science

Author for correspondence.
Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

G. N. Koptsik

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

A. A. Stepanov

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

I. E. Smirnova

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

M. S. Kadulin

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

V. V. Turbaevskaya

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

A. I. Zakharenko

Department of Soil Science

Email: tregubova.polin@gmail.com
Russian Federation, Moscow, 119991

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