High-concentration COD and mercury-containing gas field water are common types of wastewater in the process of petroleum development, and their treatment is challenging. Conventional treatment methods are not effective in removing high concentrations of COD and mercury contamination. Electrochemical treatment technology is a promising method, and this paper aims to improve its research progress in the treatment of water in high-concentration COD and mercury-containing gas fields.
Electrochemical treatment technology is based on the principle of electrochemistry, which realizes the removal of organic matter and heavy metals in wastewater through the electrochemical reaction between the electrode and wastewater. It was found that electrochemical oxidation (ECOs) are an effective method for the treatment of wastewater with high concentrations of COD. ECO uses an electric current to drive the oxidation of organic matter on the anode, converting it into harmless substances such as carbon dioxide and water, and reducing the concentration of COD in wastewater to a certain extent. However, due to the peculiarities of mercury-containing gas field water, electrochemical deposition (ECD) is considered to be a more suitable method for mercury removal. ECD uses an electric current to drive a reduction reaction of mercury ions on the cathode, deposit them on the surface of the cathode, and achieve effective removal of mercury.
In addition, it was found that the electrochemical reaction effect could be further optimized by adjusting the operating parameters such as electrode material, electrolyte ratio and current density during electrochemical treatment. For example, choosing the right anode material, such as alumina anode, can increase the oxidation rate of organic matter in wastewaterReasonable regulation of current density can improve the efficiency of electrodeposition and increase the removal rate of mercury.
In conclusion, electrochemical treatment technology provides a feasible solution for the treatment of high-concentration COD and mercury-containing gas field water. Methods such as ECO and ECD can be used to effectively remove organic matter and mercury from wastewater. However, this technology still faces some challenges in its application, such as high energy consumption, anode material life, etc., which need further research and improvement. In the future, with the continuous development and innovation of technology, electrochemical treatment technology is expected to play a greater role in the field of water treatment in high-concentration COD and mercury-containing gas fields.
Water Companion: A one-stop solution for the optimization and integration of water treatment chemicals.