A method for ultraviolet light degradation of polychlorinated naphthalene on the surface of clay minerals
A clay mineral and ultraviolet light technology, which is applied in the field of degradation of polychlorinated naphthalene on solid surface, can solve the problems of high background value, neglect of semi-volatility of trichlorinated naphthalene, etc., and achieves low cost, good social and environmental benefits, and the method simple effect
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Embodiment 1
[0018] (1) Preparation of simulated samples
[0019] Add 0.5g of kaolin and 5ml of trichlornaphthalene solution (using n-hexane as solvent) with a concentration of 0.3mg / l into a petri dish with a diameter of 60mm, shake well so that the kaolin is evenly covered with the bottom of the petri dish, and then place it in the sand at 70°C. Heated in the bath for 12 minutes to volatilize n-hexane to obtain a solid-phase mixture of trichloronaphthalene and kaolin. The concentration of trichloronaphthalene in kaolin was detected to be 3 μg / g, which was used as a simulated sample.
[0020] (2) Degradation
[0021] The simulated samples were transferred to round-bottomed centrifuge tubes, and divided into two groups and placed in an artificial climate box for testing. The temperature in the artificial climate box was controlled at 25°C and the relative humidity was 70%. One group was subjected to ultraviolet light irradiation experiments, and the other group was subjected to dark react...
Embodiment 2
[0028] (1) Preparation of simulated samples
[0029] Add 0.5g of kaolin and 5ml of trichloronaphthalene solution (using n-hexane as solvent) with a concentration of 0.6mg / l into a petri dish with a diameter of 60mm, shake well so that the kaolin is evenly covered with the bottom of the petri dish, and then place it in the sand at 70°C. Heated in the bath for 12 minutes to volatilize n-hexane to obtain a solid-phase mixture of trichloronaphthalene and kaolin. The concentration of trichloronaphthalene in kaolin was detected to be 6 μg / g, which was used as a simulated sample.
[0030] (2) Degradation
[0031] The simulated samples were transferred to round-bottomed centrifuge tubes, and divided into two groups and placed in an artificial climate box for testing. The temperature in the artificial climate box was controlled at 25°C and the relative humidity was 70%. One group was subjected to ultraviolet light irradiation experiments, and the other group was subjected to dark reac...
Embodiment 3
[0035] (1) Preparation of simulated samples
[0036] Add 0.5g of kaolin and 5ml of trichlornaphthalene solution (using n-hexane as solvent) with a concentration of 1.5mg / l into a petri dish with a diameter of 60mm, shake well so that the kaolin evenly covers the bottom of the petri dish, and then place it in a 70°C sand Heated in the bath for 12 minutes to volatilize n-hexane to obtain a solid-phase mixture of trichloronaphthalene and kaolin. The concentration of trichloronaphthalene in kaolin was detected to be 15 μg / g, which was used as a simulated sample.
[0037] (2) Degradation
[0038] The simulated samples were transferred to round-bottomed centrifuge tubes, and divided into two groups and placed in an artificial climate box for testing. The temperature in the artificial climate box was controlled at 25°C and the relative humidity was 70%. One group was subjected to ultraviolet light irradiation experiments, and the other group was subjected to dark reactions. The two...
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