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A method for deep removal of heavy metals in water by resin-based copper phosphate nanoflower coating

A copper phosphate and nanoflower technology, applied in chemical instruments and methods, water pollutants, adsorbed water/sewage treatment, etc., can solve problems such as the lack of targeted mass transfer performance of functional groups, the limitation of pore volume, and the limitation of large-scale applications. , to solve the slow adsorption and mass transfer rate, solve the technical bottleneck, and improve the effect of masking

Active Publication Date: 2019-09-10
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loading of nanoparticles has the following problems: (1) the particles are seriously clogged to the pores, and it is difficult to make full use of them.
(2) The sulfonic acid group of the charged functional group of the carrier is easy to be masked, and the targeted mass transfer performance of the functional group is missing. (3) A series of problems such as the limitation of the pore volume, and the difficulty in controlling the loading capacity and morphology greatly limit its large-scale application.

Method used

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  • A method for deep removal of heavy metals in water by resin-based copper phosphate nanoflower coating

Examples

Experimental program
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Effect test

Embodiment 1

[0017] 10g of cation exchange resin D001 (produced by Hangzhou Zhengguang Industrial Co., Ltd.) was placed in 1L of Tris-HCl buffer solution with a concentration of 0.1mol / L, and then 120g of dopamine (DA) hydrochloride was added to the above solution to make dopamine ( The mass fraction of DA) hydrochloride was 12%, and the temperature was controlled at 20 °C, and stirred for 24 h in the dark to form a uniform polydopamine (PDA) coating on the surface of the resin, namely PS-PDA; 10 g of PS-PDA material was placed in 1 L mole CuSO with a concentration of 0.1mol / L 4 In the solution, react at room temperature for 6 hours to make Cu 2+ Stepwise diffusion and enrichment to the surface of PS-PDA to obtain the intermediate PS-PDA-Cu 2+ ; filtered and 10 g PS-PDA-Cu 2+ Add to 1L of phosphate buffered saline (PBS) containing bovine serum albumin, wherein the concentration of bovine serum albumin is 0.05mg / mL, the buffer solution in phosphate buffered saline (PBS) is controlled to 0...

Embodiment 2

[0020] 50g of cation exchange resin D113 (produced by Hangzhou Zhengguang Industrial Co., Ltd.) was placed in 1L of 2mol / L Tris-HCl buffer solution, and then 500g of dopamine (DA) hydrochloride was added to the above solution to make dopamine (DA) The mass fraction of hydrochloride is 50%. The temperature was controlled at 60 °C, and stirred for 36 h in the dark to form a uniform polydopamine (PDA) coating on the resin surface, namely PS-PDA; 50 g of PS-PDA material was placed in 1 L of CuSO with a molar concentration of 5 mol / L. 4 In the solution, react at room temperature for 24 hours to make Cu 2+ Stepwise diffusion and enrichment to the surface of PS-PDA to obtain the intermediate PS-PDA-Cu 2+ ; filtered and 50g PS-PDA-Cu 2+The material was added to 1 L of phosphate buffered saline (PBS) containing bovine serum albumin, in which the concentration of bovine serum albumin was 0.5 mg / mL, and the buffer solution in phosphate buffered saline (PBS) was controlled to 0.2 mol / L,...

Embodiment 3

[0023] Place 30g of cation exchange resin 001x7 (produced by Tianjin Bochum Resin Technology Co., Ltd.) in 800mL of 0.5mol / L Tris-HCl buffer solution, then add 160g of dopamine (DA) hydrochloride to the above solution, dopamine (DA) ) The mass fraction of hydrochloride is 20%. The temperature was controlled at 40 °C, and stirred for 24 h in the dark to form a uniform polydopamine (PDA) coating on the resin surface, namely PS-PDA; 30 g of PS-PDA material was placed in 800 mL of CuSO with a molar concentration of 1 mol / L. 4 In the solution, react at room temperature for 12 hours to make Cu 2+ Stepwise diffusion and enrichment to the surface of PS-PDA to obtain the intermediate PS-PDA-Cu 2+ ; filtered and 30 g PS-PDA-Cu 2+ The material was added to 800 mL of phosphate buffered saline (PBS) containing bovine serum albumin, in which the concentration of bovine serum albumin was 0.1 mg / mL, the buffer solution in phosphate buffered saline (PBS) was controlled to 0.15 mol / L, and the...

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Abstract

The invention discloses a method for deeply removing heavy metals in water by using a resin-based copper phosphate nanoflower coating. A polydopamine (PDA) adhesive coating is formed on the surface of an ion exchange resin, so that bovine serum albumin (BSA) can be stably guided on the surface of the resin to form a cphosphate nanoflower coating, and the resin-based copper phosphate nanoflower coating is obtained; the resin-based copper phosphate nanoflower coating is put in a glass adsorption column, the temperature of polluted water is controlled to be 5 to 55 DEG C, the pH is controlled in the range of 3 to 7, the polluted water flows through a fixed bedpost adsorption device filled with an adsorption material at a flow rate of 10 to 50 BV / h, and the effluent water can reach safety control standard; when calcium ions, magnesium ions, sodium ions and potassium ions with high concentrations exist in water, the material still has higher metal adsorption and removal effects. The method can realize chelation removal for target heavy metals, deep purification for heavy metal ions is further promoted, and the benefit to environmental protection is obvious.

Description

technical field [0001] The invention relates to a method for removing heavy metals in water. Background technique [0002] In recent decades, with the development of modern industry and the increase of human activities, heavy metals have been widely used as non-ferrous metals in human production and life. However, while it brings huge economic benefits, water pollution caused by heavy metals Problems are also becoming increasingly prominent. Heavy metal pollution is highly toxic, lasts for a long time, cannot be biodegraded, and can be enriched in organisms through the food chain, thus seriously threatening human life and health. Generally speaking, in the treatment of heavy metal pollution in water, it can be achieved through the following two ways: one is to fix the heavy metal ions in the water body, reducing its migration ability and biological effectiveness in the water body; the second is to remove the heavy metal ions from the polluted water body. Completely clear. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
Inventor 张庆瑞杨雨佳屈年瑞孙奇娜焦体峰
Owner YANSHAN UNIV
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