Method for adsorbing and removing sulfate radicals in water by using hydrotalcite-like material
A hydrotalcite and water removal technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of low sulfate ion adsorption efficiency, insufficient sulfate ion adsorption efficiency, The problem of small saturated adsorption capacity is achieved, and the effect of fast and efficient adsorption, complete crystal phase structure and large adsorption capacity is achieved.
Active Publication Date: 2022-04-05
华夏碧水环保科技股份有限公司
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Problems solved by technology
[0008] In order to solve the problem that the adsorption efficiency of the adsorbent to the sulfate ion in the prior art is not high, the saturated adsorption capacity is small, and the adsorption efficiency of the sulfate ion to the weakly acidic wastewater is insufficient
Method used
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preparation example 1
[0036] Under the condition of 0-5°C, slowly drop 0.25 mol of propylene glycol into 0.55 mol of phosphine oxychloride, react for 5 hours, add 1 L of THF solution with a concentration of 0.5 mol / L ethylene glycol monobutyl ether, and React at 30°C for 6 hours, add 0.05mol / L NaOH ethanol solution dropwise, adjust the system to be neutral, add absolute ethanol, place in a refrigerator at 4°C to cool and crystallize, filter, wash with absolute ethanol, and vacuum dry to obtain gemini phosphate Anionic Surfactant 1.
preparation example 2
[0038] Other conditions and operations were the same as those in Preparation Example 1, except that propylene glycol was replaced by polyethylene glycol with a degree of polymerization of 4 to finally obtain gemini-type phosphate anionic surfactant 2.
preparation example 3
[0040] Other conditions and operations were the same as those in Preparation Example 1, except that ethylene glycol monobutyl ether was replaced by ethylene glycol monooctyl ether to finally obtain gemini-type phosphate anionic surfactant 3.
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Abstract
The invention relates to a method for adsorbing and removing sulfate radicals in water by using a hydrotalcite-like material, which comprises the following steps: (1) preparing a mixed salt solution of magnesium salt, copper salt and aluminum salt as a solution A, and preparing a gemini phosphate anionic surfactant solution as a solution B; preparing a urea solution as a solution C, and preparing a trisodium citrate solution as a solution D; (2) uniformly mixing the solution A and the solution B under a stirring condition, slowly adding the solution C and the solution D at the same time, and transferring the formed slurry into a crystallization kettle; (3) in an inert atmosphere, carrying out crystallization, suction filtration, water washing and vacuum drying on the slurry to obtain intercalation modified hydrotalcite-like compounds; and (4) putting into wastewater containing sulfate ions for adsorption. The intercalation modified hydrotalcite-like compound adsorbs sulfate ion wastewater, on one hand, the adsorption capacity under the acidic condition is improved, on the other hand, the intercalation modified hydrotalcite-like compound can be regenerated and recycled, and the investment cost of the adsorbent is reduced.
Description
technical field [0001] The application relates to the field of hydrotalcite materials and the field of wastewater treatment, and specifically relates to a method for adsorbing and removing sulfate radicals in water by using a hydrotalcite-like material. Background technique [0002] Sulfate radical is an anion commonly found in industrial wastewater, which will accelerate the corrosion of equipment and pipelines, which will not only increase the safety hazards in the wastewater treatment process of enterprises, but also increase the investment and operation costs of enterprises. If the wastewater is directly discharged into the natural water body without treatment, it will destroy the balance of the natural sulfur cycle. The accumulation of sulfide will cause the water quality to decline, destroy the balance of the ecosystem, and reduce the biodiversity of the water body. Sulfur entering the environmental cycle will form sulfides and acid rain, endangering the health of anim...
Claims
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IPC IPC(8): C02F1/28B01J20/22C02F101/10
Inventor 张传兵刘智慧郭丽娟张海涛孙振洲王宇刘妞鄂智牛瑞胜
Owner 华夏碧水环保科技股份有限公司