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Method for deeply removing heavy metals in water by using 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 the problems of lack of targeted mass transfer performance of functional groups, limited scale application, and limited pore volume. , to achieve the effect of solving the slow adsorption mass transfer rate, improving the masking effect, and solving the technical bottleneck

Active Publication Date: 2017-08-29
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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  • Method for deeply removing heavy metals in water by using resin-based copper phosphate nanoflower coating

Examples

Experimental program
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Effect test

Embodiment 1

[0017] 10g cation exchange resin D001 (produced by Hangzhou Zhengguang Industrial Co., Ltd.) is placed in the Tris-HCl buffer solution of 0.1mol / L by 1L concentration, and then 120g dopamine (DA) hydrochloride is added in the above-mentioned solution to make dopamine (DA) The massfraction of DA) hydrochloride is 12%. CuSO with a concentration of 0.1mol / L 4 solution, reacted at room temperature for 6 hours, so that Cu 2+ Gradual diffusion and enrichment to the surface of PS-PDA to obtain the intermediate product PS-PDA-Cu 2+ ; filtered and 10g 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 at 0.01mol / L, and shake at room temperature for 6h. Bovine serum albumin-guided copper phosphate nanoflowers (BSA / Cu 3 (PO 4 ) 2 ) grow on the surface of PS-PDA material in situ, rinse with water until neutral, a...

Embodiment 2

[0020] 50g of cation exchange resin D113 (produced by Hangzhou Zhengguang Industrial Co., Ltd.) is placed in 1L concentration of 2mol / L Tris-HCl buffer solution, and then 500g of dopamine (DA) hydrochloride is added to the above solution to make dopamine (DA) The hydrochloride mass fraction is 50%. The temperature was controlled at 60°C, and stirred for 36 hours in the dark to form a uniform polydopamine (PDA) coating on the resin surface, that is, PS-PDA; 50g of PS-PDA material was placed in 1L of CuSO 4 solution, reacted at room temperature for 24 hours to make Cu 2+ Gradual diffusion and enrichment to the surface of PS-PDA to obtain the intermediate product PS-PDA-Cu 2+ ; filter and 50g PS-PDA-Cu 2+The material was added to 1L 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 at 0.2 mol / L, and the reaction was shaken...

Embodiment 3

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

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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 as non-ferrous metals have been widely used in human production and life. However, while they bring huge economic benefits, water pollution caused by heavy metals The problem is also becoming more and more 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, the following two ways can be achieved: one is to fix the heavy metal ions in the water body, reducing their migration ability and bioavailability in the water body; the other is to remove the heavy metal ions from the polluted water body Clean it up completely. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(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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