Leacheate and soil remediation method
A soil remediation and eluent technology, which is applied in the field of contaminated soil remediation, can solve the problems of limited treatment effect of remediation methods, limited treatment capacity, long remediation time, etc., and achieves good application prospects, easy promotion and implementation, and good removal effects.
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[0067] Example one
[0068] Soil remediation of a nitrobenzene contaminated plot.
[0069] On the site of a chemical plant in Anhui, the soil excess pollutants are 2-nitroaniline, m-nitrochlorobenzene, p-nitrochlorobenzene, and the amount of polluted earthwork is 10257m 3 The highest pollution concentration is 166.62mg / kg of 2-nitroaniline, 568.72mg / kg of m-nitrochlorobenzene, and 657.74mg / kg of p-nitrochlorobenzene. The soil remediation is carried out by this process. The specific implementation conditions are as follows:
[0070] The soil porosity of the site is 0.33, that is, the pore volume is 3384.81m 3 . The eluent used is 36g / L n-butanol and 9g / L Tween 80. The composite eluent is injected into the contaminated area through the injection well, and 17000m 3 Then use extraction wells to extract groundwater and collect it on the ground, then conduct water treatment and use solvent extraction to recover the eluent, and then inject 5 times 17000m 3 Eluent, every 17000m injected 3 Th...
Example Embodiment
[0075] Example 2
[0076] Soil remediation of a nitrobenzene contaminated plot.
[0077] A petrochemical site in Tianjin, the pollutant in the soil is nitrobenzene, the average concentration is 997mg / L, and the amount of polluted earthwork is 1200m 3 , Using this technology for soil remediation, the specific implementation is as follows:
[0078] The soil porosity of the site is 0.35, that is, the pore volume is 420m 3 . The eluent used is 25g / L n-butanol and 6.6g / L Tween 80. The composite eluent is injected into the contaminated area through the injection well, and injected 2100m 3 Then use an extraction well to extract the groundwater and collect it on the ground, then conduct water treatment and use solvent extraction to recover the eluent, and then inject 2100m 3 Then use extraction wells to extract groundwater, and collect it on the ground, then conduct water treatment and use solvent extraction to recover the eluent, and then inject 2100m 3 Then use extraction wells to extract ...
Example Embodiment
[0083] Example 3
[0084] Soil remediation of a nitrotoluene contaminated plot.
[0085] A contaminated site of a thermal power plant in Changsha, the pollutant in the soil is nitrotoluene, the highest concentration is 275mg / L, and the amount of contaminated earthwork is 860m 3 , Using this technology for soil remediation, the specific implementation is as follows:
[0086] The soil porosity of the site is 0.30, that is, the pore volume is 258m 3 . The eluent used is 19.2g / L n-butanol and 4.8g / L Tween 80. The composite eluent is injected into the contaminated area through the injection well, and the injection is 1120m 3 Then use an extraction well to extract the groundwater and collect it on the ground, then perform water treatment and use solvent extraction to recover the eluent, and then inject 1120m 3 After that, the groundwater is extracted with an extraction well, and collected on the ground for water treatment and solvent extraction is used to recover the eluent, and then injec...
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