Modified calcite for purifying tetracycline in water and preparation method of modified calcite

Abstract

The invention provides modified calcite for purifying tetracycline in water and a preparation method of the modified calcite, and relates to the technical field of sewage treatment. The modified calcite comprises raw materials of calcite, disodium phosphate and a dispersant. The preparation method comprises the following steps: weighing the raw materials according to the components, and putting part of calcite powder into water to prepare supernatant A for later use; mixing the rest calcite with the supernatant A to obtain a solution A, and adjusting the pH value of the solution A; putting thesolution A into a heating kettle, heating, preserving heat, cooling to normal temperature, and sequentially adding the disodium hydrogen phosphate and dispersion liquid for reaction; and centrifugally drying slurry obtained by the reaction to obtain the modified calcite finidhed product. The method has advantages of low cost, simple process and no by-product.

Description

technical field [0001] The invention relates to the technical field of water body pollution control, in particular to a modified calcite used for purifying tetracycline in water and a preparation method thereof. Background technique [0002] Tetracycline is the most basic compound of the tetracycline family antibiotics. It and its salts are yellow or light yellow crystals, which are extremely stable in a dry state. Except for aureomycin, other tetracycline family solutions are quite stable. Tetracyclines are the most widely used antibiotics in clinical practice. They are widely used in animal husbandry and aquaculture. They are not completely absorbed by animals, but a considerable part of them are in the form of prototypes or metabolites in feces and urine. Because of their good water solubility, most of them are excreted in the original form after metabolism in the body, and they are not easy to biodegrade in the environment, they become a class of antibiotics that are eas...

AI Technical Summary

Problems solved by technology

At the same time, due to the wide antibacterial spectrum of this type of drug, it can be predicted that the ecotoxicological effect produced by it will be huge, and will eventually cause adverse effects on human health and survival.

[0003] In the prior art, the treatment methods for tetracycline in water are mainly advanced oxidation method, biodegradation method, membrane separation method and adsorption method. The advanced oxidation method utilizes the strong oxidative property of hydroxyl radicals to directly mineralize organic pollutants to form carbon dioxide and water, or Oxidize it into intermediate products of small molecules, but sometimes promote the formation of more toxic by-products and enhance the overall toxicity of the system; biodegradation uses microorganisms to metabolize organic matter in sewage under certain chemical oxygen demand and temperature conditions Decomposition, but the antibiotics in the wastewater cannot be completely removed and the treatment takes a long time, and the process control is difficult; the membrane separation method uses sodium filter membrane or reverse osmosis membrane to selectively separate tetracycline in water, but there is a disadvantage of membrane pollution; the adsorption method is generally Carbon-based materials, nano-materials, polymer materials and mineral materials are used. Carbon-based materials, nano-materials and polymer materials have disadvantages such as high production costs or poor stability. Mineral materials have the advantages of low price and low pollution, but the adsorption effect is poor.