Remediation of contaminated soil is a systematic project that must take into account technical feasibility, remediation cycle, land use, economic feasibility and so on. Factors affecting soil remediation include the physicochemical properties of the soil, the degree of pollution and the difficulty to implement the project.
Soil Separated Washing
Hasky developed its Soil Separated Washing Technology on the basis of soil washing stabilization and solidification. The first washing stage uses water as eluent to separate larger pieces of gravel from the surface; the second washing stages utilizes specific chemical eluents for desorption of contaminants. The soil then undergoes stabilization.
The impact of contaminated sites on the environment has been reduced by decreasing the total amount of pollutants in the soil and cutting off exposure routes. This process effectively reduces the concentration of heavy metals in the soil and contributes to soil restoration. This technology offers stable performance coupled with easy assembly and operation.
Solidification/Stabilization is one of the few available technologies capable of onsite remediation of metal contaminants. As a part of a sophisticated process, contaminants are converted into forms that reduce or block the exposure of hazardous substances. In this way, the release of toxic pollutants is prevented and the associated environmental risks are significantly reduced.
Solidification/stabilization Technology is widely used internationally with more than 180 projects in the United States alone. Hasky developed soil stabilizers are effective for a variety of complex metal pollutants. The technology is mobile, offers uncompromised stabilization performance and aligns well with local environmental requirements.
Thermal Desorption Technology
Thermal Desorption Technology converts chemical substances into gas through heating. The gas produced is collected whereby the dust and harmful chemicals are safely separated from the gas and disposed of. The resulting clean soil can be backfilled. This method is suitable for removing harmful chemicals from soil, sludge or sediment.
This method is very effective for dry soil containing specific contaminants including but not limited to fuel oil, coal tar, wood preservation chemicals, solvents, etc.. It is also suitable for handling volatile contaminants such as mercury and other volatile organic compounds (VOC’s). The equipment can be customized based on unique project requirements and specifications.