Manganese-loaded oxide zeolite and application of manganese-loaded oxide zeolite in treatment of formaldehyde wastewater

Abstract

The invention discloses manganese-loaded oxide zeolite which is prepared by the following steps: adding 1.0g of artificial zeolite into 40mL of a potassium permanganate solution with the concentration of 0.40mol / L, and stirring for 30min; then adding 5.00mL of oleic acid drop by drop, and performing reaction at a temperature of 120 DEG C for 12 hours; after the reaction, cooling to reach a room temperature, performing suction filtration, washing by using distilled water and absolute ethyl alcohol in sequence, and drying at a temperature of 60 DEG C for 10 hours to obtain the manganese-loaded oxide zeolite. Experiment shows that the manganese-loaded oxide zeolite disclosed by the invention is a high-efficiency formaldehyde removing agent which can directly oxidize formaldehyde into water and carbon dioxide; the removal rate on the formaldehyde with the concentration of 1 percent is 74.5 percent, and the removal capacity is 4,133mg / g. The manganese-loaded oxide zeolite is stabilized at a pH value of 4-10, and the recycling performance is perfect; after the manganese-loaded oxide zeolite is repeatedly used for three times, the removal capacity on the formaldehyde with the concentration of 1 percent can still reach 3,500mg / g, and the dissolving amount of manganese is smaller than an international limit value being 2.0mg / L.

Description

technical field [0001] The invention relates to a manganese oxide-loaded zeolite, its preparation method, and its application as a formaldehyde remover in treating formaldehyde wastewater. Background technique [0002] Formaldehyde is an important basic chemical raw material, which is widely used in industries such as pharmaceuticals, leather, plastics, textiles, and coatings, resulting in a large amount of formaldehyde-containing wastewater, some of which are high-concentration formaldehyde wastewater, with a formaldehyde content of up to tens of grams per liter. Formaldehyde has been determined by the World Health Organization as a carcinogenic and teratogenic substance. How to treat formaldehyde wastewater, especially high-concentration formaldehyde wastewater, has gradually become a research hotspot. Formaldehyde solution is a true solution with high toxicity, poor biodegradability and difficult disposal. At present, the treatment methods of high-concentration formalde...

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Problems solved by technology

[0003] Manganese oxide has a catalytic oxidation effect on formaldehyde, but due to the poor stabilizer and moisture resistance of the manganese oxide catalyst, it is mainly used for the removal of formaldehyde gas indoors, but the use temperature is high, or the complete removal of formaldehyde at room temperature can be achieved by loading precious metals ,higher cost

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