Adsorbent for treating dye wastewater in different concentrations and preparation method and application

Abstract

The invention discloses an adsorbent for treating dye wastewater in different concentrations and a preparation method and an application. The adsorbent is prepared from the raw materials of cupric nitrate, trimesic acid and graphene oxide by a certain proportion. The preparation method comprises the following steps: a) weighing the raw materials of cupric nitrate, trimesic acid and graphene oxide, and pouring the raw materials to a reaction kettle after ultrasonic oscillation, wherein the reaction temperature is 110-130 DEG C, the reaction pressure is 130-160kpa; b) using temperature programming, wherein the heating rate is 4-6 DEG C / min and the reaction time is 8-10 hours, cooling to 20-30 DEG C, and filtering to obtain a blue-green solid substance; and c) washing: washing the blue-green solid substance, drying at 160-190 DEG C for 2-4 hours to obtain the blue-green adsorbent. The adsorbent is strong in adsorption performance, can be balanced within a short time, and is suitable for quick treatment of dye wastewater. The adsorbent can be recycled for many times after analysis by an analytical agent. The adsorption rate after 10 times of recycles is 90-94%. The method is simple, and the product obtained is high in purity, good in dispersibility and good in using effect.

Description

technical field [0001] The invention belongs to the field of waste water treatment in environmental protection, and more specifically relates to a high-efficiency adsorbent for efficiently treating dye waste water with different concentrations, and also relates to a preparation method for an adsorbent for treating dye waste water with different concentrations, and also relates to an adsorbent used in Application in the treatment of dye wastewater. Background technique [0002] China is a major producer of dyestuffs, capable of producing more than 550 varieties of dyestuffs in 11 major categories, ranking first in the world in terms of output and trade volume of dyestuffs. Dye wastewater refers to the wastewater discharged during the production of dyes and pigments. According to statistics, 12% of Hewei dyes are discharged in the form of wastewater during the production and treatment process. [0003] There are many ways to treat dye wastewater, usually using physical and ch...

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Problems solved by technology

Activated carbon adsorption method is an early application method, which is very effective for removing dissolved organic matter in water, but it is difficult to regenerate, and the treatment cost is high, so the application range is narrow, and it can generally be used for the treatment of dye wastewater with low concentration or Advanced processing

Metal-organic frameworks (MOFs) with excellent adsorption properties are used as adsorbents in the treatment of high-concentration dye wastewater, but they are unstable in aqueous solution and the framework is easy to collapse.

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