Covering carpet for repairing degradation-resistant organic substance contaminated sediment in situ and laying method of covering carpet
A technology for refractory organic matter and polluted sediment, applied in the direction of water pollutants, sludge treatment, chemical instruments and methods, etc., can solve the problems of large changes in the original ecological environment, complex engineering operations, low repair efficiency, etc., to promote degradation , increase the specific surface area, the effect of easy construction
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Embodiment 1
[0062] Select the contaminated sediment with a total PCB amount of 2.0mg / kg and place it at the bottom of a circular plastic bucket with a radius of 35cm, and the laying height is 15cm. The cover blanket of the present invention is laid on the upper part of the bottom mud, wherein the thickness of the adsorption filler layer is 0.2cm, bentonite, G 12-6-12 The mass ratio of zirconium oxychloride octahydrate to zirconium oxychloride is 1:2:2; the thickness of solubilization layer is 0.6cm, and the mass ratio of rhamnolipid, montmorillonite and activated carbon is 1:12:6. The upper layer of the covering blanket is covered with 20cm of fine sand and 5cm of pebbles, and then a certain amount of deionized water is added to simulate the overlying water, so that the height of the overlying water reaches 50cm. A blank control group with no coverage process was set up under the same conditions as other conditions. The overlying water was taken at 5cm below the water surface at 90 days ...
Embodiment 2
[0064] Select the polluted sediment with a total amount of benzopyrene of 1.5 mg / kg and place it at the bottom of a circular plastic bucket with a radius of 35 cm, and the laying height is 15 cm. The covering blanket of the present invention is laid on the upper part of the bottom mud, wherein the thickness of the adsorption filler layer is 0.1cm, bentonite, G 12-6-12 The mass ratio of zirconium oxychloride octahydrate to zirconium oxychloride is 1:1.5:3; the thickness of the solubilizing layer is 0.5cm, and the mass ratio of rhamnolipid, montmorillonite and activated carbon is 1:10:5. The upper layer of the covering blanket is covered with 20cm of fine sand and 5cm of pebbles, and then a certain amount of deionized water is added to simulate the overlying water, so that the height of the overlying water reaches 50cm. A blank control group with no coverage process was set up under the same conditions as other conditions. The overlying water was taken at 5cm below the water su...
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