Method for treating hexavalent chromium ions in soil by combining grouting with electroosmosis
A technology of hexavalent chromium ion and electroosmotic treatment, which is applied in soil protection, restoration of polluted soil, construction, etc. Infiltration construction period, improve treatment effect, increase the effect of conductivity
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Embodiment 1
[0044] A method for grouting combined with electroosmotic treatment of hexavalent chromium ions in soil, comprising the following steps:
[0045] (1) Construction preparation: prepare grouting pumps, grouting pipelines, pulping stations, grouting materials and electroosmotic devices, and conduct quality inspections of materials and equipment;
[0046] (2) Positioning drilling: determine the site and measure the stakeout, drill through the drilling rig to the predetermined depth of the soil layer to be treated according to the design drawings, and install grouting pipes and conductive plastic pipes, wherein the grouting holes 1 are arranged in single rows and each row is grouted The hole 1 interval is 2.5m, the interval between the holes is 1m, the cathode 2 and the anode 3 conductive plastic tubes are installed side by side on both sides of the grouting hole 1, and the interval k between the cathode 2 and the anode 3 in the electrode pair on the same side is 0.5m. The interval...
Embodiment 2
[0056] The treatment method in this example is the same as that in Example 1, except that the ratio of the reducing solution is different. The specific preparation process of the reducing solution is as follows: 1 part of organic acid, 0.3 part of antimony trioxide and 20 parts of water Mix and stir until completely dissolved, then add 4 parts of manganese sulfate, 50 parts of ferrous sulfate, 0.3 parts of disperse anionic surfactant and 80 parts of water, stir until completely dissolved and pass through a 200-mesh sieve, and store for future use.
[0057] Using the combined grouting and electroosmotic treatment method in this example, the removal and fixation effect of hexavalent chromium ions is good. Using the same treatment process, the final concentration of hexavalent chromium ions in the aqueous solution at the cathode 2 is slightly higher than that in Example 1.
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