Thallium-containing wastewater adsorption material and preparation method thereof

Abstract

The invention provides a thallium-containing wastewater adsorption material and a preparation method thereof. The adsorption material comprises the following raw material components: chloromethyl polystyrene microspheres and thiourea. The chloromethyl polystyrene microspheres comprise the following raw materials: polystyrene microspheres, an organic solvent and tin tetrachloride. The preparation method comprises the following steps: 1, preparing polystyrene microspheres; step 2, preparing chloromethyl polystyrene microspheres; step 3: preparation of the adsorption material: adding the chloromethyl polystyrene microspheres and thiourea into absolute ethyl alcohol according to a mass ratio of 1:2, carrying out heating reflux for 2 hours to prepare an intermediate mixed solution, hydrolyzingthe intermediate mixed solution for 12 hours by using a 50% sodium hydroxide solution under the protection of nitrogen to prepare a mixed solution, and cooling the mixed solution, alternately cleaningthe mixed solution by using distilled water and a 2 mol / L hydrogen chloride aqueous solution, and drying the mixture to prepare the adsorption material. The adsorption material can be used for treating the concentration of thallium in wastewater to be less than 5 [mu] g / L and ensures that the thallium-containing wastewater reaches the industrial discharge standard.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a thallium-containing wastewater adsorption material and a preparation method thereof. Background technique [0002] Thallium (element symbol Tl) is a heavy metal element with accumulation properties and a strong neurotoxicant. The toxic effect of thallium on the human body is mainly neurotoxicity, which can cause functional damage to multiple organs such as the kidney and liver, and its toxicity is much higher than that of arsenic. Thallium can participate in the water cycle, and when the content of thallium in the water body exceeds the standard, it will cause extremely serious harm. Thallium in wastewater can enter the human body through the food chain or drinking water, and accumulate in organs such as bone marrow and kidneys, causing symptoms such as hair loss, muscle atrophy, and central nervous system damage. When thallium compounds are absorbed through the ...

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Problems solved by technology

However, commonly used adsorption materials for thallium-containing wastewater (such as activated carbon, diatomaceous earth, and nano-sized alumina, etc.) do not have a good adsorption effect on thallium, and cannot guarantee that thallium-containing wastewater meets industrial discharge standards.

[0004] In summary, there is an urgent need to develop a thallium-containing wastewater adsorption material and its preparation method to solve the problems of the poor thallium removal effect of the thallium-containing wastewater adsorption materials in the prior art and the inability of the thallium-containing wastewater to meet the industrial discharge standards.

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