Remediation method of organic matter-contaminated soil
A technology of polluted soil and remediation method, applied in the restoration of polluted soil and other directions, can solve the problems of long cycle, high cost, difficult treatment and other problems, and achieve the effect of low cost, short remediation cycle, good environmental benefits and economic benefits
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[0038] TiO above 2 - Co 3 O 4 The preparation method of the supported catalyst comprises the following steps:
[0039] (1) TiO 2 Preparation: The tetrabutyl titanate and ammonia water are mixed and stirred uniformly according to the mass volume ratio of 8-10:1-3 to obtain the ammonia solution of tetrabutyl titanate. The unit of mass volume ratio is g / ml, and the water bath is heated to generate TiO 2 Crystal grains; sterilize the above mixture in a Teflon sterilization container, dry at 100-130 °C to constant weight after sterilization, rinse with deionized water, dry at 100-105 °C for 9-12 hours, put in Heat treatment at 400-450°C for 2-4h in a muffle furnace. Among them, the concentration of tetrabutyl titanate is 2.85mol / L, and the concentration of ammonia water is 9.52-11.11mol / L.
[0040] (2) Co 3 O 4 Preparation: Slowly add 10mM cobalt nitrate solution to 12mM sodium carbonate solution, stir magnetically for about 40-60min, centrifuge, alternately wash with deion...
Embodiment 1
[0043] Example 1: (1) TiO 2 Preparation: The tetrabutyl titanate and ammonia water are mixed and stirred according to the mass-volume ratio of 8:1, the unit of mass-volume ratio is g / ml, and the water bath is heated until the crystallization is complete. Hydrolysis product Ti(OH) of tetrabutyl titanate in ammonia water system 4 , With the increase of the reaction temperature, dehydration and condensation into titanic acid aggregates, and the obtained aggregates generate growth primitives. With the change of concentration, the growth primitives and then nucleate in a supersaturated environment, that is, the water is heated in a water bath. Thermal reaction generates TiO 2 .
[0044] Among them, the concentration of tetrabutyl titanate is 2.85mol / L, and the concentration of ammonia water is 9.52mol / L.
[0045] The above mixture was transferred to a Teflon sterilization container for sterilization, dried at 100°C to constant weight after sterilization, rinsed with deionized wa...
Embodiment 2
[0050] (1) TiO 2 Preparation: Mix and stir tetrabutyl titanate and ammonia water in a mass-to-volume ratio of 9:2, the unit of mass-to-volume ratio is g / ml, and heat in a water bath until the crystallization is complete.
[0051] Among them, the concentration of tetrabutyl titanate is 2.85mol / L, and the concentration of ammonia water is 10mol / L.
[0052] The above mixture was transferred to a Teflon sterilization container for sterilization, dried at 120°C to constant weight after sterilization, rinsed with deionized water, dried at 103°C for 11h, and placed in a muffle furnace for heat treatment at 450°C for 2h .
[0053] (2) Co 3 O 4 Preparation: slowly add 10 mM cobalt nitrate solution to 12 mM sodium carbonate solution, stir magnetically for about 40 minutes, wash alternately with deionized water and absolute ethanol, dry, and calcinate in a muffle furnace at 430 °C for 3 hours;
[0054] Wherein, the volume ratio of cobalt nitrate solution and sodium carbonate solution...
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