The Electrochemical Method of Oil-Contaminated Soil Remediation

Abstract

In the present article, the experimental research of electrochemical cleaning of oil-contaminated soil is provided. The decrease of oil concentration in the soil from 1100 mg/kg down to 250 mg/kg at the current density in the range from 22 A/m2 to 174 A/m2 during 90 minutes is shown. It has been established that there is the limit amount of charge required for effective cleaning, which amounted to 0.96·107 coulombs per kilogram of oil. The electrodes placement variant for the proposed method realization in real conditions is described. It is shown that at a voltage between the electrodes about 18 V and the cleaning efficiency of 77% the energy consumption will be 173 MJ/kg of oil.

Assessment of changes in the phytotoxic properties of oil-contaminated soils in terms of germination and seedlings length of <i>Lepidium sativum</i> L. after electrochemical cleaning

“…Ключевые слова: петрофитные степи; каменистые степи; флора; редкие виды; петрофитностепные эндемики; реликты; биоразнообразие; местообитание; сообщества; растительность; фитоценон; Красная книга; Республика Башкортостан; Южный Урал; Средний Урал. Каменистые (петрофитные) степи Южного и Среднего Урала традиционно представляют интерес для исследователей флоры и растительности [1][2][3][4]. Уникальность флоры каменистых субстратов, насыщенной степными, реликтовыми и эндемичными, видами отмечали Н.П.…”

“…Это обусловливает потенциальную значимость использования электрообработки при очистке почв, загрязненных в результате добычи нефти, когда в грунт могут одновременно попадать и нефтепродукты, и минерализованные пластовые воды. Эффективность применения и некоторые технические особенности электрохимической очистки нефтезагрязненных почв рассматривалась авторами в ряде публикаций [3][4][5].…”

Construction and application of highly sensitive spinel nanocrystalline zinc chromite decorated multiwalled carbon nanotube modified carbon paste electrode (ZnCr2O4@MWCNTs/CPE) for electrochemical determination of alogliptin benzoate in bulk and its dosage form: green chemistry assessment

“…[22][23][24][25][26] Electrochemical methods can be applied in the detection of exosomes from certain diseases, drug analysis, food analysis, the precipitation of organic layers on other metals, the corrosive effect of metals on stainless steel, soil cleaning from oil contamination, and the analysis of biological uids are all examples of electrochemistry being used in numerous sectors. 22,23,[25][26][27][28][29] Moreover, nanoparticles inclusion to electrodes enhance electrical conductivity, charge-transfer complex transfer ability, surface area, mass transport, long-term stability, multiple functionalization, amplication of signals, and catalytic activity all of which have a positive impact on the processing of the data collect. 22,[30][31][32] Cr/ZnO is an example of these nanoparticles and has a variety of applications, including the photolytic degradation of aniline, the removal of nitrogen oxide pollutants, the photocatalytic degradation of thymol blue, the strengthening of antibacterial activity, and the photodegradation of congo red under visible light.…”

“…22–26 Electrochemical methods can be applied in the detection of exosomes from certain diseases, drug analysis, food analysis, the precipitation of organic layers on other metals, the corrosive effect of metals on stainless steel, soil cleaning from oil contamination, and the analysis of biological fluids are all examples of electrochemistry being used in numerous sectors. 22,23,25–29…”

Theoretical Bases of Electrochemical Cleaning of Oil-contaminated Soil

“…After the passing an electric charge exceeding a certain value through contaminated soil, the concentration of oil products practically does not change. The limiting specific charges of electric treatment are 0,63 • 10 7 for clay, 0,93-0,96 • 10 7 for loam, 1,34 • 10 7 C / kg of oil products for sand [6].…”