Results of the International Conference Erem-2017 — Electrokinetic Clearing of Soils From Pollution

Pryanichnikova

Kadyrov

2021

PMI

Electrochemical cleaning of oil-contaminated soils is a promising area of environmental safety, as it can be easily organized even in locations remote from settlements. For this purpose, a power source and a system of electrodes are necessary as equipment. It is possible to use an electric generator if there are no power supply lines nearby. The material of electrodes affects the features of redox processes, which can affect the energy consumption and the degree of soil cleansing from oil or oil products. Therefore, the correct choice of electrode materials is one of the important tasks in the field of engineering electrochemical methods of purification. Changes in the main parameters (humidity, temperature, degree of acidity) in an oil-contaminated model soil, similar in composition to one of the oil fields, were investigated. Measurements of parameters when using graphite and metal electrodes were carried out at several fixed sections of the interelectrode space depending on the treatment time. The established patterns of parameter changes in the purification of oil-contaminated soils allow us to draw conclusions about the stages of the electrochemical process, its speed, and energy efficiency. The results obtained form a basis for designing industrial facilities for soil treatment.

“…At the cathode, only hydrogen ions are reduced from water with gas evolution. Similar results were presented in [3,15,29], but for other soils and the degree of pollution.…”

supporting

confidence: 85%

Regularities of electrochemical cleaning of oil-contaminated soils

Pryanichnikova

Kadyrov

2021

PMI

Changes of Characteristics of Soil Contaminated by Oil Products during Electrochemical Cleaning

IOP Conf. Ser.: Earth Environ. Sci.

Pryanichnikova

Damineva

2020

The article deals with the actual problem of cleaning and remediation of soils contaminated in oil industry. The transmission of a small electric current through polluted soil leads to a decrease of pollutants concentration because of various processes. The paper presents the results of the study of changes in soil characteristics as a result of passing the electric current. Such parameters as the content of chlorides and organic matter of the soil (humus), electrical conductivity, density and soil moisture were studied. The research showed that carrying out low amperage electricity through the soil contaminated with oil and highly mineralized reservoir waters using does not entail critical changes in the soil properties. It was proved that this method can be effectively applied on various soils of oil fields and will not impede the subsequent restoration of plant communities at the treatment site.

Determination of electrical parameters for the electrochemical treatment of soils contaminated with oil

Мешалкин

IOP Conf. Ser.: Mater. Sci. Eng.

Chelnokov

et al. 2019

The electrochemical method of soil cleaning by passing small amperage has rather high efficiency for oil products, phenols, salts, heavy metals, and other chemicals pollution. Cleaning can be realized through a whole complex of physical, chemical and biological processes. The most important are the electrokinetic movement of the pollutant, the oxidation and evaporation of the components. The arrangement of anodes and cathodes that reduces the resistance between the electrodes by creating in the interelectrode space an electric field close to homogeneous is considered. This calculation allows to determine the number of electrodes, the amperage between them, the voltage depending on the properties of the soil, the area, the depth of contamination of the treated area, the geometric parameters of the electrodes and the required degree of cleaning.