Preparation method for catalyst for promoting conversion of ammonia nitrogen in pesticide wastewater
A technology for pesticide wastewater and catalyst, which is applied in the fields of degassed water/sewage treatment, reduced water/sewage treatment, etc., can solve the problems of high energy consumption, high cost, secondary pollution, etc., and achieves high ammonia nitrogen removal rate, low cost, cost saving effect
Inactive Publication Date: 2014-01-15
CHANGZHOU UNIV
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Problems solved by technology
[0004] In order to solve the problems of high energy consumption, high cost and secondary pollution in the prior art, the present invention provides a catalyst that is mixed with nano-alumina colloid and heavy metal organic Ammonia directly converts ammonia nitrogen in pesticide wastewater into nitrogen gas without high temperature and high pressure, without causing secondary pollution risks, saving costs, and meeting the national secondary emission standards
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] First take 6g / L of nickel nitrate, 8g / L of iridium periodate, 10g / L of cerium bicarbonate, 25g / L of indium metaaluminate, 9g / L of terbium sulfate, 13g / L of platinum chloride, and 15g / L of potassium hydroxide , cobaltous oxide 4g / L, stannous oxide 4g / L, rhodium sulfide 5g / L to prepare a heavy metal salt mixture; Sodium sulfonate and aromatic compound are mixed with benzoic acid, aminotoluic acid and the above-mentioned heavy metal salt solution, add a certain amount of Grignard reagent and dry ether, and react for 7 hours at a temperature of 70 ° C; then take a mass equivalent to the weight of the heavy metal organic Mix 0.28 times the weight of the compound with aluminum chloride, add water and heat to 61°C to completely dissolve, then titrate the pH of the solution to 10.8 with 5M NaOH, stir, and form alumina precipitate at constant temperature, wash with deionized water to remove excess For salts, add methyl isopropyl ketone with a total mass ratio of 0.03%, and drop ...
Embodiment 2
Embodiment 3
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Abstract
The invention discloses a preparation method for a catalyst for promoting conversion of ammonia nitrogen in pesticide wastewater. The preparation method comprises the following steps of: mixing a heavy metallic salt mixed solution in which indium metaaluminate is taken as a main component and an organic compound with an alkyl group and aryl, and adding a Grignard reagent and dried ethyl ether and reacting; dissolving a ferric chloride mixed solution, adding NaOH and stirring, precipitating and washing, adding methyl isopropyl ketone and NaOH, dissolving and heating to obtain alumina colloid; mixing products obtained in the steps by an isovolumetric wet method, and drying to obtain a catalyst precursor, baking, drying, and grinding to obtain the catalyst; and the application method comprises the following step of: finally placing the obtained catalyst used as filler in an ammonia still and performing an ammonia still process. The invention aims to provide the catalyst obtained by mixing the nano alumina colloid and the heavy metal organic compound by the isovolumetric wet method; and the ammonia nitrogen in the pesticide wastewater can be directly converted into nitrogen by the catalyst without the conditions of high temperature and pressure, secondary pollution is avoided, and cost is saved.
Description
technical field [0001] The invention relates to a catalyst preparation method for promoting the conversion of ammonia nitrogen in pesticide wastewater, belonging to the field of sewage treatment. Background technique [0002] The pesticide industry is a large discharge of industrial wastewater. Pesticide wastewater refers to the wastewater discharged from pesticide factories in the process of pesticide production. The quality and quantity of wastewater is unstable, and it is mainly divided into benzene-containing wastewater, organic phosphorus-containing wastewater, high-concentration salt-containing wastewater, high-concentration ammonia-nitrogen wastewater, high-concentration phenol-containing wastewater and mercury-containing wastewater. Among them, the concentration of high-concentration ammonia nitrogen in pesticide wastewater can reach tens of thousands of milligrams per liter; pesticide wastewater has a wide range of pollution and lasts for a long time, and residual p...
Claims
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IPC IPC(8): B01J23/89C02F1/20C02F1/70
Inventor 雷春生张凤娥麦源珍
Owner CHANGZHOU UNIV