Evaluation of the Ability of Ameliorants to Influence the Biological Indicators and Hydrophobicity of Oil-Contaminated Haplic Chernozems

Abstract

ABSTRACT The aim of the study was to assess the ameliorants effect on the biological parameters and Haplic Chernozems hydrophobicity. In model experiment conditions, Haplic Chernozem was polluted by oil and remediation with application of nitroammophos, Sodium humate, biochar, and Baikal EM-1 was simulated during to 30, 90, and 180 days. Indicators of soils activity – germination and intensity indicators of initial seed growth, the activity of catalase and dehydrogenases, the total number of bacteria, hydrophobicity were studied. On the 30 and 90th days after remediation, the most significant reliable decrease in oil regarding was promoted by 2 D biochar. After 180 days of dose 1 D and dose 2 D nitroammophos, as well as 1 D Baikal EM-1, the total petroleum hydrocarbon content was reduced significantly. Baikal EM-1 and biochar contributes to the greatest decrease in hydrophobicity at all periods of the experiment to a greater extent. On the 30th day, the introduction of nitroammophos, biochar, and 1 D Sodium humate contributed to an increase in the integral indicator of the biological state of oil-contaminated Haplic Chernozem, on the 90th day, the introduction of all doses of biochar led to an increase in the indicator, and on the 180th – all doses of Baikal EM-1, and 0.5 D Sodium humate. The research results may be used when choosing a method of soil restoration after oil pollution.