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Resin-based nano composite material, preparation method and method for deeply removing copper- citric acid from water

A technology of nanocomposite materials and composite materials, applied in the field of wastewater treatment, to achieve the effects of large specific surface area, high adsorption capacity, and strong adsorption selectivity

Inactive Publication Date: 2019-08-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the limitation problem in the prior art that it is difficult to remove heavy metal-complexes by using cation exchange resin to support hydrated zirconia, the present invention provides a resin-based nanocomposite material, a preparation method and its deep removal of copper-citric acid in water Methods

Method used

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  • Resin-based nano composite material, preparation method and method for deeply removing copper- citric acid from water
  • Resin-based nano composite material, preparation method and method for deeply removing copper- citric acid from water
  • Resin-based nano composite material, preparation method and method for deeply removing copper- citric acid from water

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Embodiment 1

[0055] The resin-based nanocomposite material of this embodiment is synthesized according to the following steps:

[0056] 1) Dissolve 10 g of zirconium oxychloride in an acidic aqueous solution with pH=1.5; make zirconium exist in ion form.

[0057] 2) Take tertiary aminated styrene-divinylbenzene copolymer spheres, add them to the solution system prepared in step 1), the mass ratio of the copolymer spheres to zirconium oxychloride is 1:1, and then heat it in a water bath to 70 ℃, open; keep stirring for 12 hours under the condition of 300rpm;

[0058] Regulating the mass ratio of copolymerized spheres and zirconium oxychloride is to control the loading capacity of nano-hydration zirconia, and the purpose of exposure and heating is to promote the hydrolysis and concentration of zirconium salt;

[0059] 3) After step 2) is completed, the copolymerized spheres are taken out, air-dried naturally, and then transferred to a NaOH solution with a mass concentration of 10%. The mass...

Embodiment 2

[0069] The water body depth of present embodiment 2 removes the method for Cu-citric acid complex, comprises the following steps:

[0070] (a) Prepare simulated waste water containing Cu-citric acid complex, the initial concentration of copper is 2.5mg / L, the molar concentration of citric acid is 5 times of the molar concentration of copper, after filtering, the pH of the raw water is adjusted to 6.0;

[0071] (b) Simulate the adsorption tower device, the tower is filled with 5mL (wet volume) resin-based nanocomposite material, and the wastewater containing Cu-citric acid complex is passed through the adsorption tower at a temperature of 10°C with a flow rate of 10BV / h. The resin-based nanocomposite material used in this step (b), its matrix macroporous D301 weakly basic ion exchange resin, particle size distribution between 0.6 ~ 0.9mm, pore size distribution between 1 ~ 80nm, rich in Nano-pore structure and tertiary amine groups, nano-hydrated zirconia particles in the resin...

Embodiment 3

[0075] The water body depth of present embodiment 3 removes the method for Cu-citric acid complex, comprises the following steps:

[0076] (a) Prepare simulated waste water containing Cu-citric acid complex, the initial concentration of copper is 5.0mg / L, the molar concentration of citric acid is 10 times of the molar concentration of copper, after filtering, the pH of the raw water is adjusted to 6.0;

[0077] (b) Simulate the adsorption tower device, the tower is filled with 5mL (wet volume) resin-based nanocomposite material, and the wastewater containing Cu-citric acid complex is passed through the adsorption tower at a temperature of 30°C with a flow rate of 1BV / h. The resin-based nanocomposite material used in this step (b), its matrix macroporous D301 weakly basic ion exchange resin, particle size distribution between 0.6 ~ 0.9mm, pore size distribution between 1 ~ 80nm, rich in Nano-pore structure and tertiary amine groups, nano-hydrated zirconia particles in the resin...

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Abstract

The invention discloses a resin-based nano composite material, a preparation method and a method for deeply removing copper- citric acid from water, and belongs to the technical field of wastewater treatment. A matrix of the composite material is a macroporous D301 weakly basic ion exchange resin, and nano hydrated zirconia particles are uniformly distributed in pores. The method for the treatmentof wastewater comprises the following steps: (1) filtering Cu-citric acid wastewater, and adjusting the pH value of filtrate; (2) enabling the filtrate to pass through an adsorption tower filled withthe resin-based nano composite material; (3) stopping adsorption when the concentration of copper in effluent reaches a breakthrough point, and desorbing and regenerating the resin-based nano composite material; and (4) after the composite material is cleaned to neutral, transforming the composite material for cyclic use. The invention combines a preconcentration effect of a polymer matrix with the performance of nano hydrated zirconia for selectively removing heavy metal complexes from the water, so that the adsorption capacity and the selectivity of the material for the heavy metal complexes are effectively improved, and the concentration of the heavy metals in the effluent is stable and meets the discharging standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a resin-based nanocomposite material, a preparation method and a method for deeply removing copper-citric acid in water. Background technique [0002] Heavy metal wastewater is one of the most harmful industrial wastewater to human health and the ecological environment. It mainly comes from electroplating, circuit boards, surface treatment, tanning, printing and dyeing, papermaking, chemical industry, machinery manufacturing and other industries. Since citric acid is widely used as a complexing agent in the production process of these industries, heavy metals in wastewater will form stable complexes with citric acid in addition to ionic state. Compared with free heavy metals, such complex heavy metals have changes in chemical properties and environmental behavior, which brings new problems and challenges to the treatment of heavy metal wastewater. [000...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/32B01J20/30C02F1/28C02F101/20
CPCB01J20/261B01J20/28019B01J20/3236B01J20/3071C02F1/288C02F2101/20C02F2303/16
Inventor 花铭杨博文黄萍潘丙才单超张炜铭吕路高冠道
Owner NANJING UNIV
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