Method for degrading polycyclic aromatic hydrocarbon in soil using ultraviolet light
A technology of polycyclic aromatic hydrocarbons and ultraviolet light, applied in the field of photodegradation, can solve problems such as difficult control of conditions, incomplete treatment, long cycle, etc., and achieve the effects of low cost, accelerated photodegradation, and easy operation
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Embodiment 1
[0015] The soil samples were air-dried indoors, ground, passed through a 1mm sieve, and sterilized twice by intermittent high-pressure steam (half an hour each time, at 121°C). After adding polycyclic aromatic hydrocarbons, they were air-dried for later use.
[0016] Preparation of polycyclic aromatic hydrocarbon-contaminated soil: Add methanol solution of polycyclic aromatic hydrocarbons (1 gram of soil: 1ml methanol solution of polycyclic aromatic hydrocarbons) to the above-mentioned sterilized soil sample at a weight-to-volume ratio of 1:1. The methanol solution of aromatic hydrocarbons contained 10 mg of benzopyrene, pyrene or phenanthrene respectively, and placed in a fume hood for 24 hours, the concentration of polycyclic aromatic hydrocarbons in the polluted soil was 10 mg / kg.
[0017] Preparation of PAH methanol solution: Accurately weigh 0.01 g of benzopyrene, pyrene, and phenanthrene, and dilute to 1000 ml with methanol.
[0018] Dissolve 100 mg of humic acid in 2.0 ...
Embodiment 2
[0023] Soil samples were air-dried indoors, ground, passed through a 1mm sieve, and then intermittently sterilized by high-pressure steam twice (each time for half an hour, at 121°C). After adding polycyclic aromatic hydrocarbons, they were air-dried for later use.
[0024] Preparation of polycyclic aromatic hydrocarbon-contaminated soil: Add methanol solution of polycyclic aromatic hydrocarbons (1 gram of soil: 1ml methanol solution of polycyclic aromatic hydrocarbons) to the above-mentioned sterilized soil sample at a weight-to-volume ratio of 1:1. The methanol solution of aromatic hydrocarbons contained 40 mg of benzopyrene, pyrene or phenanthrene respectively, and placed in a fume hood for 24 hours, the concentration of polycyclic aromatic hydrocarbons in the polluted soil was 40 mg / kg.
[0025] Preparation of PAH methanol solution: Accurately weigh 0.04 g of benzopyrene, pyrene and phenanthrene, and dilute to 1000 ml with methanol.
[0026] Dissolve 100mg of humic acid in...
Embodiment 3
[0031] Soil samples were air-dried indoors, ground, passed through a 1mm sieve, and then intermittently sterilized by high-pressure steam twice (each time for half an hour, at 121°C). After adding polycyclic aromatic hydrocarbons, they were air-dried for later use.
[0032] Preparation of polycyclic aromatic hydrocarbon-contaminated soil: add methanol solution of polycyclic aromatic hydrocarbons (1 gram of soil: 1ml methanol solution of polycyclic aromatic hydrocarbons) to the above-mentioned sterilized soil samples at a ratio of 1:1, add 40mg / 1000ml of benzene Pyrene, pyrene and phenanthrene were placed in a fume hood for 24 hours, and the concentration of polycyclic aromatic hydrocarbons in the polluted soil was 40 mg / kg.
[0033] Preparation of PAH methanol solution: Accurately weigh 0.04 g of benzopyrene, pyrene and phenanthrene, and dilute to 1000 ml with methanol.
[0034] Dissolve 100mg of humic acid in 2.0ml of 0.1mol / l NaOH, dilute to 1000ml with distilled water as a ...
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