A kind of remediation method of heavy metal polluted soil
A technology of contaminated soil and remediation method, applied in the restoration of contaminated soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of affecting the removal effect and difficult separation, so as to enhance the removal effect, avoid reduction, avoid The effect of rapid improvement
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Embodiment 1
[0036] The first step is to mix the red mud, cationic modified natural zeolite, binder glycerin, water, and pore former starch at a weight ratio of 1:0.4:0.3:0.1:0.05, and then use a granulator to make granules. After drying for 10 hours at 105°C and roasting at 200-240°C for 1 hour, a porous inorganic adsorbent material is obtained; the preparation method of cation-modified natural zeolite is to grind natural zeolite and then roast and activate it at 300°C for 1 hour. Then mix the zeolite with 10wt% dilute sulfuric acid, raise the temperature to 65°C for 0.5h, filter out the zeolite and wash it with deionized water, then vacuum dry; the dried zeolite, polydimethyldiallylammonium chloride, poly The quaternary ammonium salt M550 (Dimethyldiallylammonium chloride-acrylamide copolymer) is mixed uniformly according to the weight ratio of 1:3.5:1.8 and stirred at 45°C for 1h, the solid is filtered out, and after vacuum drying, the cationic modification is obtained. Zeolite
[0037] T...
Embodiment 2
[0042] The first step is to mix the red mud, cationic modified natural zeolite, binder glycerin, water, and pore former starch according to the weight ratio of 1:0.6: 0.4: 0.15: 0.15, and then pass the granulator into granules. After drying at 115°C for 15 hours and baking at 240°C for 3 hours, a porous inorganic adsorbent is obtained. The cation-modified natural zeolite is prepared by grinding natural zeolite and then calcining it at 300°C for 1 hour. The zeolite is mixed with 10wt% dilute sulfuric acid, heated to 65°C for 0.5h, filtered out the zeolite and washed with deionized water, and then vacuum dried; dried zeolite, polydimethyldiallylammonium chloride, polyquaternary ammonium Salt M550 (Dimethyldiallyl ammonium chloride-acrylamide copolymer) was mixed uniformly according to the weight ratio of 1:3.5:1.8 and stirred at 45°C for 1h, the solid was filtered out, and dried in vacuum to obtain cationic modified zeolite ;
[0043] The second step is to inoculate the phosphate ...
Embodiment 3
[0048] The first step is to mix the red mud, cationic modified natural zeolite, binder glycerin, water, and pore former starch at a weight ratio of 1:0.5:0.35:0.12:0.10, and then make them into granules through a granulator. After drying at 105°C for 12h and baking at 220°C for 2h, the porous inorganic adsorbent is obtained. The cation-modified natural zeolite is prepared by grinding the natural zeolite and then calcining it at 300°C for 1h, and then The zeolite is mixed with 10wt% dilute sulfuric acid, heated to 65°C for 0.5h, filtered out the zeolite and washed with deionized water, and then vacuum dried; dried zeolite, polydimethyldiallylammonium chloride, polyquaternary ammonium Salt M550 (Dimethyldiallyl ammonium chloride-acrylamide copolymer) was mixed uniformly according to the weight ratio of 1:3.5:1.8 and stirred at 45°C for 1h, the solid was filtered out, and dried in vacuum to obtain cationic modified zeolite ;
[0049] The second step is to inoculate the phosphate so...
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