What Are the Different Remediation Technologies?
Utilizing chemical treatment technology, through chemical remediation agents and pollutants to undergo oxidation, reduction, adsorption, precipitation, polymerization, complexation and other reactions, the pollutants are separated, degraded, transformed or stabilized from the soil into low-toxic, non-toxic and harmless Other forms or precipitates are removed. The interaction between chemical repair agents and pollutants can effectively reduce the mobility of pollutants in the soil and the possibility of being absorbed by plants, and prevent them from entering the ecological cycle system.
- Chinese name
- Chemical repair technology
- Foreign name
- Chemical remediation
- Subject
- Environmental Engineering
- Utilizing chemical treatment technology, through chemical remediation agents and pollutants to undergo oxidation, reduction, adsorption, precipitation, polymerization, complexation and other reactions, the pollutants are separated, degraded, transformed or stabilized from the soil into low-toxic, non-toxic and harmless Other forms or precipitates are removed. The interaction between chemical repair agents and pollutants can effectively reduce the mobility of pollutants in the soil and the possibility of being absorbed by plants, and prevent them from entering the ecological cycle system.
Definition of chemical repair technology
- Chemical repair of contaminated soil is a repair technique that uses chemical repair agents added to the soil to undergo a certain chemical reaction with the pollutants, so that the pollutants are degraded and the toxicity is removed or reduced.
Chemical repair technology technology type
- According to different working principles, chemical repair technologies mainly include soil leaching technology, solvent extraction technology, chemical oxidation technology, chemical reduction and reduction dechlorination technology, chemical solidification / stabilization technology, and soil property improvement technology. [1]
- In comparison with various chemical repair technologies, chemical oxidation technology is a fast and active repair method that is not very sensitive to the type and concentration of pollutants; chemical reduction and reduction dechlorination laws act on large, dispersed Chemicals that are sensitive to the reduction reaction, such as chlorides in a deeper range, reduce and degrade them; chemical leaching technology is more effective in removing pollutants with higher solubility and adsorption force. Which remediation method is chosen depends on the results of careful soil surveys and preliminary tests. [2]
Technical characteristics of chemical repair technology
- Compared with other soil remediation technologies such as phytoremediation and microbial remediation, chemical remediation technologies have developed earlier and are relatively mature. This technology utilizes the chemical characteristics of pollutants or contaminated media. It destroys (such as changing chemical properties), separates or solidifies pollutants through the application of various chemical reagents. . Generally, according to the types of pollutants and soil characteristics, chemical remediation methods are selected when methods such as biological remediation cannot meet the needs of remediation of contaminated soil. However, chemical repair technology can easily cause problems such as soil structure damage, soil nutrient loss, and biological activity decline.