When skid-mounted leaching equipment is used to remediate chromium-contaminated soil
Chromium is a common heavy metal pollutant that is widely used in industrial production and life, such as electroplating, leather products, dyes, pesticides, etc. The main forms of chromium are trivalent chromium and hexavalent chromium. Among them, hexavalent chromium is highly toxic and highly mob
Chromium is a common heavy metal pollutant that is widely used in industrial production and life, such as electroplating, leather products, dyes, pesticides, etc. The main forms of chromium are trivalent chromium and hexavalent chromium. Among them, hexavalent chromium is highly toxic and highly mobile. It can enter the human body through the food chain and water circulation and cause various health problems, such as dermatitis, lung cancer, and liver cirrhosis. Therefore, the remediation and treatment of chromium-contaminated soil is of great significance.
Chemical washing remediation technology is a technology that uses chemical solvents to dissolve or migrate pollutants in the soil, and then separate and treat them. It is a simple, fast and efficient contaminated soil remediation technology, suitable for the removal of a variety of heavy metal pollutants, especially for the treatment of hexavalent chromium.
When chemical washing remediation technology remediates chromium-contaminated soil, it mainly uses reducing agents to reduce highly toxic hexavalent chromium into low-toxic trivalent chromium, and separates it from the soil through complexing agents or acidic solvents. Commonly used reducing agents include ferrous sulfate, sodium sulfide, hydrogen sulfide, ferrous ammonium sulfate, etc.; commonly used complexing agents include EDTA, DTPA, NTA, citric acid, etc.; commonly used acidic solvents include hydrochloric acid, nitric acid, sulfuric acid, etc. Different eluants have different chromium removal effects and mechanisms, which need to be selected and optimized based on specific pollution conditions and soil characteristics.
Chemical washing remediation technology is an effective method to remediate chromium-contaminated soil, but there are also some problems, such as the selection and dosage of the eluent, the contact method and time between the eluent and the soil, and the condition of the soil after washing. Backfilling or disposal, eluent recovery and treatment, etc. These issues require further research and exploration to improve the feasibility and sustainability of chemical washing restoration technology. At the same time, chemical washing repair technology can also be used in combination or alternately with other repair technologies such as biological repair, electric repair, etc. to achieve better repair results.
Taking into account technical applicability and economy, Desen Environment has developed a skid-mounted soil washing equipment, which not only can effectively remove heavy metals, but is also considered by customers to be an ideal soil remediation equipment. This equipment has been operating normally in a chromium-contaminated site in Hunan, with a processing capacity of up to 100t/h. The modular design of this rinsing equipment allows for quick installation and easy transition, which can greatly shorten repair time and save costs; with the help of 5G intelligent modules, it can be operated remotely and supervised at all times. For more information, please call us.