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A preparation method of a biomimetic material with the function of efficiently removing heavy metals

A technology of bionic materials and heavy metals, applied in the field of fine chemicals in chemical engineering, can solve the problems of complex preparation process and high production cost, and achieve the effect of increasing specific surface area and good biocompatibility

Active Publication Date: 2016-03-16
北京拓凯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complicated preparation process of polyaspartic acid or its derivatives, the production cost of this material is relatively high

Method used

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  • A preparation method of a biomimetic material with the function of efficiently removing heavy metals
  • A preparation method of a biomimetic material with the function of efficiently removing heavy metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Take by weighing 0.515g calcium chloride, 0.12g magnesium nitrate hexahydrate, 0.45g phosphoric acid and 0.40g sodium bicarbonate, dissolve in water respectively, and adjust pH 7~7.5 with NaOH or HCl dilute solution respectively, obtain calcium-containing solution, magnesium solution, phosphate solution and carbonate solution, and prepare 100mL sodium alginate solution with a mass concentration of 3%. At room temperature, gradually add the mixed solution of sodium alginate aqueous solution, magnesium solution, phosphate solution, and carbonate solution to the calcium solution, and at the same time adjust the pH of the mixed solution to 7-7.5 with alkali or acid until the mixed system The pH of the supernatant did not change any more. Afterwards, the precipitate was washed until the washing liquid was neutral, then dried and ground to obtain a light yellow powder biomimetic composite material of sodium alginate and calcium phosphorus compound.

[0028] The...

Embodiment 2

[0031] Embodiment 2: take by weighing 1.09g calcium nitrate tetrahydrate, 0.56g magnesium sulfate, 0.404g dipotassium hydrogen phosphate and 0.025g sodium carbonate, be dissolved in water respectively, and adjust pH7.5~8 with NaOH or HCl dilute solution respectively, Calcium-containing solution, magnesium-containing solution, phosphate solution and carbonate solution were obtained, and 100 mL of sodium alginate solution with a mass concentration of 0.01% was prepared at the same time. First mix the calcium-containing solution with the magnesium-containing solution (solution A), mix the phosphate solution and the carbonate solution (solution B), and then add the solutions A and B dropwise at room temperature and fully stirred until the temperature is maintained at 25°C Add sodium hydroxide solution dropwise to the sodium alginate solution at the same time to keep the pH of the mixed system at 7-7.5 until the pH of the supernatant in the mixed system does not change. Afterwards,...

Embodiment 3

[0034] Embodiment 3: take by weighing 0.344g calcium hydroxide, 1.9g magnesium chloride hexahydrate, 0.145g sodium dihydrogen phosphate and 0.25g potassium carbonate, dissolve in water respectively, and adjust pH6.5~7.0 with NaOH or HCl dilute solution respectively, Calcium-containing solution, magnesium-containing solution, phosphate solution and carbonate solution were obtained, and 100 mL of sodium alginate solution with a mass concentration of 0.1% was prepared at the same time. Mix calcium-containing solution and magnesium-containing solution to obtain solution A, and mix sodium alginate solution, phosphate solution and carbonate solution to obtain solution B, and then add solution A to solution B dropwise at 15°C with full stirring , the reaction temperature was maintained at 15° C., and sodium hydroxide solution was added dropwise to maintain the pH of the mixed system at 7 to 7.5 until the pH of the supernatant in the mixed system no longer changed. Afterwards, the pre...

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Abstract

The invention discloses a preparation method of a biomimetic material with an efficient heavy metal removal function, and in particular relates to a method for preparing a biomimetic composite material of sodium alginate and calcium / phosphate-containing compounds. The method comprises mixing and reacting an aqueous solution of sodium alginate, a calcium-containing solution, a magnesium-containing solution, a phosphate solution and a carbonate solution together at a certain temperature and a certain pH value, and then precipitating. The obtained product is an environment-friendly biomimetic material. The material has the function of adsorbing heavy metals and some organic matters under a nearly neutral condition, and can be applied to removing heavy metals, chlorinated hydrocarbons, organic pigments, dyes and the like, and can be widely applied to the fields such as medicine industry, food engineering, printing and dyeing industry and sewage treatment.

Description

【Technical field】 [0001] The invention relates to the field of fine chemicals in chemical engineering, and relates to a method for preparing bionic materials, in particular to a method for preparing composite materials of sodium alginate and calcium-phosphorus compounds. 【Background technique】 [0002] In previous work, we have developed composite materials of polyaspartic acid or its derivatives and calcium-containing phosphorus compounds (see ZL200810053550.4). However, because the preparation process of polyaspartic acid or its derivatives is relatively complicated, the production cost of this material is relatively high. 【Content of invention】 [0003] The purpose of the present invention is to provide a method for preparing a biomimetic material in order to meet the needs of applications, that is, to prepare a biomimetic material with the function of efficiently removing heavy metals. The method is to mix, react and precipitate sodium alginate, calcium-containing sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/04C08K3/00C08K3/16C08K3/28C08K3/32C08K3/26C08K3/30C08K3/22B01J20/24
Inventor 孙波李雪张春雪安钢吴新世
Owner 北京拓凯化工技术有限公司