news

The number of Chinese chromium chemical companies is wide and distributed, and about 70%of the world's chromium chemical factories are located in China. Chromium chemical site pollution is more serious and more complicated. Its risk prevention and control and restoration governance is a key issue that urgently needs to be resolved.In recent years, the Desen Environment has developed a soil repair equipment, named: pry -module soil scrubbing module.

Chromium is an important metal material and is widely used in metallurgy, chemical, refractory and other industries. Its upstream is chrome ore, and its midstream includes ferrochromium, chromium salts, and downstream stainless steel, special steel, paint, electroplating, etc. Among them, 90% of the chromium ore is processed into ferrochromium alloy, which is used as the raw material of stainless steel and special steel, of which stainless steel is the largest. About 5% of the chrome ore is processed into chemical chromium salts, and 5% of the chrome ore is used to produce refractory materials. Chromium pollution is mainly caused by industry. Chromium mining, smelting, chromium salt manufacturing, electroplating, metal processing, tanning, paint, pigment, printing and dyeing and other industries, as well as the chromium-containing waste gas, waste water, and waste slag emitted from fuel combustion are all sources of chromium pollution. Electroplating chromium-contaminated sites are characterized by complex pollution of chromium, nickel, copper, and zinc. Tanning-type chromium-contaminated sites have the characteristics of complex pollution of chromium-organic compounds. Remediation of chromium-contaminated soil is imminent.

At present, the remediation technology of chromium-contaminated soil is mainly based on the principle of reduction and stabilization of hexavalent chromium. Specifically, chemical reduction, chemical leaching, electrokinetic repair, and bioremediation technologies are included. Among them, chemical leaching is widely used in hexavalent chromium pollution remediation sites due to the advantages of thorough remediation, quick effect and short cycle.

Chemical leaching technology includes in-situ soil leaching technology and ex-situ soil leaching technology. The in-situ soil leaching technology is to inject the eluate into the chromium-contaminated soil, transfer the pollutants such as chromium from the soil to the eluate through the dissolution of the eluate, and then extract the chromate-containing eluate for treatment. Ex-situ soil leaching refers to the use of a special cleaning device to clean the excavated chromium-contaminated soil, and the water-soluble Cr(VI) and other pollutants in the soil are gradually released into the liquid phase, and then cleaned by solid-liquid separation. soil and chrome-containing cleaning solution, and then process the cleaning solution.

There are a large number of chrome chemical enterprises in China and they are widely distributed. About 70% of the world's chrome chemical plants are located in China. The pollution of chrome chemical sites is more serious and complex, and its risk prevention and restoration are key issues that need to be solved urgently. In recent years, Desen Environment has developed a soil remediation equipment based on the characteristics of composite heavy metal pollution, named: Skid-mounted soil leaching module. This equipment is not only beautiful in appearance but also has various functions. It is one of the most cost-effective soil washing and remediation equipment. In addition to high efficiency and high output, it is also equipped with a 5G smart module, which solves the problem of remote operation and real-time viewing. The 24-hour uninterrupted after-sales service guarantees many customers no worries. Welcome to call for consultation and get free chromium-contaminated soil remediation solutions.