A remediation method for soil polluted by chlorobenzenes
A technology of polluted soil and chlorobenzenes, which is applied in the restoration of polluted soil, etc., can solve the problems of oxidant instability, soil compaction, and affecting the restoration efficiency, etc., and achieve the improvement of oxidation performance, wide range of soil types, and easy reuse Effect
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[0026] Example 1
[0027] After 1kg (dry soil) of contaminated soil with a chlorobenzene pollution concentration of 50mg / kg was crushed and sieved, the water-soil mass ratio was 2:10 to adjust the water content. The chelating solution was prepared with citric acid and Fe(II) in a molar ratio of 3:1, the content of chlorobenzene in the sodium persulfate and the soil was set in a molar ratio of 300:1, and the dosage was set with sodium persulfate, citric acid, Fe(II) ) The molar ratio is 6:3:1, that is, 0.133 mol of sodium persulfate, 0.066 mol of citric acid, and 0.022 mol of ferrous sulfate are used to prepare a solution according to the maximum dissolution rate. The chelating agent and the sodium persulfate solution were sprayed alternately, and the mixture was continuously and fully mixed and stirred, and the reaction was controlled at 20 °C. The reaction was carried out for 24 hours, sampling was carried out at 1, 3, 6, 9, 12, and 24 hours respectively, and the concentrati...
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[0028] Example 2
[0029] After 1kg (dry soil) of contaminated soil with a 1,2-dichlorobenzene pollution concentration of 50mg / kg was crushed and sieved, the water content was adjusted with a water-soil mass ratio of 1.5:10. The chelating solution was prepared with citric acid and Fe(II) in a molar ratio of 2.5:1, and the molar ratio of sodium persulfate and 1,2-dichlorobenzene in the soil was 200:1 to set the dosage, sodium persulfate, citric acid The molar ratio of Fe(II) is 5:2.5:1, that is, 0.068mol of sodium persulfate, 0.034mol of citric acid, and 0.0136mol of ferrous sulfate are used to prepare a solution according to the maximum dissolution rate. The chelating agent and the sodium persulfate solution were sprayed alternately, and the mixture was continuously and fully mixed and stirred, and the reaction was controlled at 20 °C. The reaction was carried out for 24 hours, sampling was carried out at 1, 3, 6, 9, 12 and 24 hours respectively, and the concentration of chlo...
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