A kind of modified vermicompost microspheres with high efficient adsorption of Cu2+, preparation method and application

Abstract

The invention provides a preparation method for a modified wormcast micro-ball for efficiently adsorbing Cu<2+>. The method comprises the following steps: 1) mixing and uniformly stirring epoxy chloropropane with a chitosan acetic acid solution at the volume ratio of 1:50, wherein the concentration of the chitosan acetic acid solution is 3-5g chitosan / 100ml acetic acid solution; 2) adding wormcast at the weight being 2-3 times of the weight of the chitosan into the products acquired in the step 1), and uniformly stirring, thereby acquiring paste; and 3) under a stirring state, dropwise adding the products acquired from the step 2) into the alkaline solution, standing for 8-24 hours, and then adjusting pH to be neutral, and drying, thereby acquiring the modified wormcast micro-ball. According to the preparation method provided by the invention, the wormcast can be subjected to efficient resourceful treatment; the preparation method is free from high temperature treatment and only requires conventional operation steps; the preparation technique is simple, the preparation cost is low and the method has economic feasibility; and the acquired micro-ball has high adsorbing capacity for Cu<2+> and the maximum adsorbing capacity is 333.3mg.g<-1>.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to Cu-containing 2+ In the field of wastewater treatment, especially a kind of high-efficiency adsorption Cu 2+ Modified vermicompost microspheres, preparation method and application. Background technique [0002] In the fields of electroplating, non-ferrous smelting, organic synthesis, and machinery manufacturing, copper-containing wastewater is a type of pollution that exists widely. Cu in water 2+ It is difficult to be decomposed by microorganisms, and it is easy to enter the human body through water transfer and soil enrichment, causing human tissue lesions. At present, the commonly used treatment methods at home and abroad include: precipitation method, iron oxidation method, electrolysis method, ion exchange method, adsorption method and membrane separation technology. However, in general, some of the above methods will produce secondary pollution or low-concentration ...

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Problems solved by technology

However, the high-temperature treatment process often requires high temperatures of hundreds or even thousands of degrees, and the preparation cost is very high. It is not economically feasible to use high-temperature-treated animal manure for sewage treatment

[0006] In particular, since copper can promote selenium deficiency and interfere with iron absorption, it can also induce liver cancer when a large amount of copper is ingested, making the treatment of copper in sewage more urgent

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