Hydrotalcite/cuprous oxide nanocomposite material and application thereof

Abstract

The invention discloses a hydrotalcite / cuprous oxide nanocomposite material and application thereof. Hydrotalcite is added into a mixed water solution prepared by copper acetate and sodium thiosulfate to be stirred, glucose is added into the mixed water solution to be evenly stirred, a sodium hydroxide solution is added under the ultrasonic stirring condition after standing, and the hydrotalcite / cuprous oxide nanocomposite material is obtained through centrifugation, washing and drying. The molar concentrations of the copper acetate and the sodium thiosulfate in the mixed water solution are 0.2-0.3mol / L and 0.4-0.6mol / L respectively. The hydrotalcite accounts for 25%-35% of total mass of the copper acetate and the sodium thiosulfate. The glucose accounts for 4%-5% of total mass of the copper acetate, the sodium thiosulfate and the hydrotalcite. Blue-green algae treatment and handling efficiency is high, the handling efficiency can be higher than 80%, and the hydrotalcite / cuprous oxide nanocomposite material is low in cost, convenient to operate and easy to apply widely. After frustules killing, no influence on total hardness, Al concentration, total nitrogen and organic content in the solution occurs, and 90% of phosphorus in a water body can be absorbed.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a hydrotalcite / cuprous oxide nanocomposite material and its application in water treatment. Background technique [0002] In recent years, with the increase of resources utilization intensity in our country, the phenomenon of eutrophication in major lakes has become increasingly serious. Ecosystem degradation and frequent outbreaks of algae blooms have seriously affected human production and life, which has become a major environmental problem that restricts the sustainable development of our society and national economy. [0003] Among all freshwater algae, Cyanophyta are the most toxic and have the widest range of pollution, especially Microcystis, Anabaena, A. of algae. Among the common algae removal methods, the most widely used is the coagulation algae removal technology with simple process equipment and low treatment costs. Among them, the adsorption ...

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Problems solved by technology

The clay mineral materials reported in the literature mainly include zeolite, montmorillonite, attapulgite, kaolin, bentonite, hydrotalcite, etc. Because of the negative charge on the surface of natural mineral materials except hydrotalcite, some scholars The material is modified to obtain a modified clay material with a positive charge on the surface to improve the flocculation ability of the clay material to algae cells, but the preparation of the modified material will cause problems such as increased cost, complicated operation process, and secondary pollution.

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