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

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