Solid magnetic heavy metal ion separation material and preparation method thereof

Abstract

The invention relates to a solid magnetic heavy metal ion separation material and a preparation method of the separation material. Epoxy chloropropane and triethylene tetramine perform a polymerization reaction in the presence of a ferroferric oxide microsphere to generate linear high polymer chains; the surface of the ferroferric oxide microsphere absorbs and is wound with the linear high polymerchains in situ; the high polymer chains are further cross-linked by using glutaric dialdehyde in methylbenzene, so that the surface of the ferroferric oxide microsphere is coated with the high polymer chains stably; an iminodiacetic acid group is connected to a high polymer chain net on the surface of the ferroferric oxide microsphere via a dialdehyde substance, so that the surface of the ferroferric oxide microsphere is coated with the high polymer chain net containing rich active groups such as -N(CH2COO-)2, -NH2, -NH- and -OH; the trapping and absorbing capacity on heavy metals is greatlyimproved; the material has excellent magnetic separation performance; the subsequent separation is simple; continuous absorption and separation operation can be achieved; and the material is convenient in industrial application and popularization.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to a solid magnetic heavy metal ion separation material and a preparation method thereof. Background technique [0002] Water pollution by toxic heavy metals has become a major global environmental problem. Fertilizer production, pesticide manufacturing, leather production, mineral mining, smelting and processing, material surface finishing and battery manufacturing will all produce a large amount of wastewater containing heavy metals, which seriously threatens the safety of the water environment and people's health. In response to the increasingly serious threat of heavy metal pollution, a variety of heavy metal wastewater treatment methods have been developed, such as traditional chemical precipitation, chelation flocculation, coagulation / flocculation, ferrite, ion exchange, enhanced ultrafiltration, Ion flotation, electrodialysis, electrodeposition and adsorptio...

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Problems solved by technology

There are some disadvantages in the developed adsorption materials, such as natural adsorption materials are limited by their own structure, the adsorption capacity is generally not large, and it is easy to produce a large amount of solid waste containing heavy metals; synthetic adsorption materials, such as carbonaceous adsorption materials Generally small, while synthetic resins, synthetic porous materials and synthetic nanomaterials generally have complex preparation processes and high manufacturing costs; bioabsorbent materials have problems such as selectivity to heavy metals, poor adaptability, and difficult breeding of strains.

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