Processing method for low concentration organic pollutant in water
A technology of organic pollutants and treatment methods, applied in the field of water treatment to remove organic pollutants, can solve the problems of waste of light energy catalysts, high price of activated carbon, long regeneration cycle, etc., to ensure stability and reusability, and adsorption use cycle Long, good reaction heat transfer effect
Inactive Publication Date: 2009-12-30
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
Ordinary chemical methods decompose pollutants through the reaction between compounds, so additional chemical reagents need to be added to the system. For trace and trace pollution systems, new pollution sources are introduced instead.
The most typical adsorption method is the activated carbon adsorption method, which uses the large specific surface area formed by the pores inside the activated carbon, and many functional groups formed on the surface to form the active center, so that the activated carbon has a strong physical and chemical adsorption capacity and can remove water. The further development of activated carbon is the biological activated carbon method, that is, from simply using the physical and chemical adsorption of activated carbon to using it as a biological carrier, exerting the biodegradation of microorganisms, and removing degradable organic pollutants in water, biological activated carbon The disadvantages of the method are: high price of activated carbon, low strength, long regeneration cycle, large loss during regeneration, high operating costs, and obvious selectivity for treating organic pollutants
[0004] The use of molecular sieves to support photocatalysts and degrade organic matter through advanced oxidation technology is the development of Fenton technology, namely: Photo-Fenton method, the purpose of which is to exert the effectiveness of catalysts. Related literature such as: "Water Treatment Information Report" 2005 6 "Research on the Degradation of 2,4-D by Fenton Method and Photo-Fenton Method" by Sun Hongwen, Lu Jungang, etc. on page 6 of the issue; Zhang Naidong and Huang Junli's article "Environmental Pollution Control Technology and Equipment", Volume 3, Issue 2, 20-22, 2002, " Enhanced UV / Fenton method to degrade phenol in water", although the above-mentioned advanced oxidation method has a good degradation effect on most organic wastewater, but for the treatment of trace or trace organic polluted water, using Photo-Fenton method will waste a lot of light energy, Catalyst, the cost is greatly increased, thus making this method uneconomical
Method used
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Embodiment 1
[0020] Embodiment 1: weighing 3.92gC 16 (CTAB, cetyltrimethylammonium bromide) was added to a polypropylene bottle, 68ml of deionized water was added, and the temperature was kept at 30°C; 4.66g of Na 2 SiO 3 9H 2 O, start stirring, the solution is transparent; quickly add 7ml of ethyl acetate, and stop stirring after 30s; leave the resulting solution at room temperature for 6h, and then place it in a 90°C oven for 65h; then filter and clean it with deionized water and ethanol; put Put it into the crucible and calcined at 600°C for 20h. The resulting SiO 2 Spherical particles, particle size 2 ~ 4μm, pore size 10.4nm, 1.5cm 3 / g, 583.5cm 2 / g.
Embodiment 2
[0021] Embodiment 2: take by weighing SiO in embodiment 1 2 50 mg of granules, ultrasonically dispersed evenly, centrifuged to separate the supernatant, added polyallylamine hydrochloride solution, adjusted the pH value to 8.5, raised the temperature to 80 ° C, and kept it for 4 hours to obtain SiO 2 Modified particles;
Embodiment 3
[0022] Embodiment 3: take by weighing SiO in embodiment 1 2 50 mg of particles, dispersed evenly by ultrasonic, centrifuged to separate the supernatant, added polystyrene amine hydrochloride solution, adjusted the pH value to 4, raised the temperature to 97 ° C, and kept it for 4 hours to obtain SiO 2 Modified particles;
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Abstract
The invention relates to a method for treating low concentration organic pollutants in water, which takes a meso-porous silica-based material as a carrier for implementing the effective enrichment to the organic pollutants, then organic matters are degraded and mineralized by the light-Fenton or TiO2 photocatalysis method in a narrow enriched region. The silica-based material enriched with organic matters can be recovered and reused for avoiding the secondary pollution in water in the process of water treatment. The method has advantages of high efficiency and low cost. The method can be used for purifying and treating the persistent poisonous organic waste water containing micro- and trace organisms in industrial wastewater and municipal sewage.
Description
technical field [0001] The invention relates to a water treatment method for removing organic pollutants, in particular to a method for treating trace organic pollutants in water by using adsorption and advanced oxidation technology, which can remove low-concentration, highly toxic, and biodegradable organic pollutants in water. Advanced treatment of water supply systems or sewage with contaminated water sources. Background technique [0002] Due to the popularization of chemical reagents and drugs, a large number of toxic organic pollutants are discharged into the water, and after dilution, they become trace or ultra-trace pollutants (such as hormones, pesticides, dyes, chlorinated substances, phenols, surfactants, etc. ), are highly toxic, difficult to degrade, and exist in nature for a long time, seriously endangering human health. Currently, water treatment methods containing organic pollutants include chemical oxidation, adsorption, and photocatalytic oxidation. Ordin...
Claims
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IPC IPC(8): C02F9/04C02F1/28C02F1/72C02F1/32C02F1/30C01B33/113C02F101/30
CPCY02W10/37
Inventor 陶霞刘冰侯倩
Owner BEIJING UNIV OF CHEM TECH