Preparation method of mercury ion adsorption resin

Abstract

Belonging to the technical field of ion exchange resin, the invention specifically relates to a preparation method of a mercury ion adsorption resin. The steps include: mixing a functional group monomer containing double bonds and ester group, a cross-linking agent, a pore-forming agent and an initiator, and performing dissolution to obtain an oil phase; then dissolving a dispersant and sodium chloride in water to obtain an aqueous phase, finally dispersing an oil phase in the aqueous phase, performing stirring to disperse the oil phase into oil droplets in the aqueous phase, performing stirring, controlling the diameters of the oil droplets, conducting heating for polymerization reaction to get obtain a post-polymerization product, and performing cleaning with hot water; then conducting extraction in a Soxhlet extractor, and performing cooling and drying to obtain white spheres; under the protection of nitrogen, adding cysteamine hydrochloride into a solvent for dissolution, conducting stirring, adding triethylamine or a sodium hydroxide solution, then adding the white spheres, carrying out heating reflux reaction, and performing cooling, filtering and washing to obtain the mercury ion adsorption resin. The mercury ion adsorption resin prepared by the method provided by the invention can achieve a mercury ion adsorption capacity up to 412.9 mg / g, the adsorption effect is outstanding, and the application prospects are broad.

Description

technical field [0001] The invention belongs to the technical field of ion exchange resins, and in particular relates to a preparation method of mercury ion adsorption resins. Background technique [0002] Mercury is widely used in medical equipment, electrical and electronic equipment, electroplating, chlor-alkali industry, plastic production, amalgamation and mercury production, etc., and a large amount of waste water containing mercury ions is often produced in these production processes. Mercury ions are one of the most toxic heavy metal ions. Mercury ions in water can accumulate in human organs through the food chain and cause mercury poisoning. Mercury poisoning can lead to nerve damage, movement disorders, vision loss, hearing loss, mood swings, heart failure and other symptoms, many of the damage caused by mercury poisoning is irreversible. my country's "Drinking Water Sanitation Standard" (GB5749-85) stipulates that the concentration of mercury ions should be lower...

AI Technical Summary

Problems solved by technology

It is easy to quickly remove a large amount of metal ions by chemical precipitation, but due to the influence of precipitant and environmental conditions, the effluent concentration often does not meet the discharge requirements, so further treatment is required. The further treatment of the generated sediment is a difficult problem and will Cause secondary pollution; (2) Electrolysis method: Under the action of direct current, mercury ions are reduced to metallic mercury at the cathode to remove mercury ions in wastewater; but the disadvantage of this method is that the concentration of mercury ions in water cannot be reduced very low, so electrolysis The method is not suitable for treating low-concentration mercury ion wastewater, and this method consumes a lot of electricity, has high investment costs, and easily generates mercury vapor to cause secondary pollution; (3) Adsorption method: adsorption method is currently the most popular mercury-containing method. The treatment method of ionic wastewater; the characteristic of adsorption method is that it can carry out advanced treatment of wastewater containing low concentration of mercury ions after chemical precipitation or electrolysis, especially with mercury ions that can form stable coordination bonds or chelate The bonded adsorbent not only has a high adsorption capacity for mercury ions, but also can reduce the concentration of mercury ions in wastewater to below the national emission standard concentration. Many adsorbents can be desorbed by acid washing, salt washing, etc. Means are reused, etc.

[0004] Mercapto groups and mercury ions have a high coordination effect, and the introduction of mercapto groups into the adsorbent can obtain adsorbents with very good adsorption properties for mercury ions; The disadvantages of complexity, or high preparation cost, or low adsorption capacity limit its practical application in the treatment of mercury-containing wastewater.

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