Cleaning and digging treatment method for volatile organic compound contaminated soil

Abstract

The invention belongs to the field of treatment of soil polluted by volatile organic pollutants, and further relates to a method for removing and digging soil containing volatile and toxic and harmful pollutants. The method specifically comprises the following steps of: performing water injection, freezing and blocking of volatile organic pollutants on soil in a target cleaning and digging area of a polluted site with different permeability characteristics, completely freezing a water body filled in soil pores by utilizing a low-temperature freezing condition, and sealing the volatile organic pollutants adsorbed in a soil structure; therefore, in the cleaning and digging process of the polluted soil, volatile organic compound molecules are effectively guaranteed to be fixedly sealed in the soil structure so as to prevent the volatile organic compound molecules from diffusing to the atmosphere, and safe disposal of the polluted soil in the cleaning and digging process is achieved.

Description

technical field [0001] The invention belongs to the field of disposal of soil polluted by volatile organic pollutants, and furthermore relates to a method for clearing and excavating soil containing volatile and toxic and harmful pollutants. Background technique [0002] With the continuous progress of my country's chemical science and technology, the industrialization process and social economy have developed rapidly. With the continuous improvement of production technology level and environmental protection awareness, people pay more and more attention to the double guarantee of production efficiency and environmental protection. However, in the process of pharmaceutical, coking, and chemical product production, there are still pollution situations such as operational accidents and leaks, and the phenomenon of illegal dumping and piling of operational waste still exists, and the historical legacy of early chemical site pollution is also an existing problem. One of the imp...

AI Technical Summary

Problems solved by technology

However, during the operation of the former, it is difficult to ensure that the irritating odor is completely suppressed, and some odor-suppressing materials only change people's olfactory experience, but they are not really removed from the atmosphere, and even cover up the true toxicity of pollutant molecules in the air. exist, and even cause more serious poisoning accidents; although the latter removes volatile pollutants to a certain extent, the closed greenhouse and tail gas removal treatment system are expensive, especially for the disposal of large-scale polluted sites. difficult to apply widely

Images