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Novel polymer-based composite material and preparation method of composite material as well as method for deep fluorine removal of water body

A technology of composite materials and polymers, applied in the fields of alkali metal compounds, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of low fluoride ion adsorption capacity and low fluoride removal efficiency, so as to improve adsorption capacity and selectivity performance, reducing the concentration of fluoride ions, and enhancing the selectivity of fluoride removal

Active Publication Date: 2013-02-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems of low fluoride removal efficiency in the prior art, the adsorption capacity of engineered fluoride removal materials for fluoride ions is not high, and they are easily interfered by other coexisting anions, the present invention provides a new polymer-based composite material, The preparation method of the material and a method for deep defluorination of water body

Method used

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  • Novel polymer-based composite material and preparation method of composite material as well as method for deep fluorine removal of water body
  • Novel polymer-based composite material and preparation method of composite material as well as method for deep fluorine removal of water body
  • Novel polymer-based composite material and preparation method of composite material as well as method for deep fluorine removal of water body

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Embodiment 1

[0041] The method for the depth of water body defluoridation of the present embodiment 1 comprises the following steps:

[0042] (a) Prepare simulated fluoride-containing wastewater with a fluoride concentration of 5 mg / L, SO 4 2- , Cl - , NO 3 - The contents are 50 mg / L, 30 mg / L, and 8 mg / L respectively. After filtering, adjust the pH of the raw water to 5.5;

[0043] (b) The simulated adsorption tower device is filled with polymer-based composite materials, and the simulated fluorine-containing wastewater passes through the adsorption tower at a temperature of 7±2°C with a flow rate of 2 BV / h. combine figure 1 , figure 2 , the polymer-based composite material used in this step (b), the matrix is ​​styrene-divinylbenzene copolymer spheres, the particle size distribution is between 0.5-0.8 mm, the pore size distribution is between 5-50 nm, and contains Rich nanopore structure and positively charged functional groups can pre-concentrate negatively charged fluoride ions...

Embodiment 2

[0052] The method for the depth of water body defluoridation of present embodiment 2 comprises the following steps:

[0053] (a) Prepare simulated fluorine-containing wastewater with a fluorine concentration of 10 mg / L, SO 4 2- , Cl - , NO 3 - The contents are 50 mg / L, 30 mg / L, and 8 mg / L respectively. After filtering, adjust the pH of the raw water to 3.0;

[0054] (b) A simulated adsorption tower device, the tower is filled with polymer-based composite materials, and the simulated fluorine-containing wastewater passes through the adsorption tower at a temperature of 25±5°C with a flow rate of 6 BV / h; the used in step (b) Polymer-based composite material, the matrix is ​​styrene-divinylbenzene copolymer spheres, the particle size distribution is between 0.8-1.0 mm, and the pore size distribution is between 40-80 nm. The polymer contains rich nanopore structure and positive charge Sexual functional groups can pre-enrich negatively charged fluoride ions. Hydrated zirconia...

Embodiment 3

[0063] The method for the depth of water body defluoridation of present embodiment 3 comprises the following steps:

[0064] (a) Prepare simulated fluorine-containing wastewater with a fluoride concentration of 2 mg / L, SO 4 2- , Cl - , NO 3 - The contents are 50 mg / L, 30 mg / L, and 8 mg / L respectively. After filtering, adjust the pH of the raw water to 3.5;

[0065] (b) A simulated adsorption tower device, the tower is filled with polymer-based composite materials, and the simulated fluorine-containing wastewater passes through the adsorption tower at a temperature of 35±5°C with a flow rate of 10 BV / h; the used in step (b) Polymer-based composite materials, the matrix of which is styrene-divinylbenzene copolymer spheres, the particle size distribution is between 1.0-1.5 mm, and the pore size distribution is between 60-100 nm. The polymer contains rich nanopore structure and positive charge Sexual functional groups can pre-enrich negatively charged fluoride ions. Hydrated...

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Abstract

The invention discloses a novel polymer-based composite and a preparation method of the composite material as well as a method for deep fluorine removal of a water body, belonging to the fields of drinking water and industrial wastewater treatment, and environment function materials. The substrate of the composite is styrene-divinylbenzene copolymerized spheres, and nanometre zirconia hydrate particles are uniformly distributed in the holes of the spheres. The method for deep fluorine removal of the water body comprises the following steps of: (a) filtering fluorine-containing wastewater, and adjusting the pH of a filtrate to 3.0-8.0; (b) passing the filtrate through an adsorption tower in which a novel polymer-based composite material is filled; and (c) stopping adsorption in the case that the concentration of fluorine ions in effluent achieves a leakage point, performing adsorption regeneration on the novel polymer-based composite material in the adsorption tower by virtue of a NaOH-NaCl mixed solution, and then standing for recycling after regeneration. According to the invention, the pre-concentration effect of a polymer substrate and the selective fluorine removal performance of nanometre zirconia hydrate are organically combined, thus the adsorption capacity and the selectivity of the material on fluorine ions are effectively improved.

Description

technical field [0001] The invention belongs to the field of drinking water and industrial wastewater treatment and environmental functional materials, and more specifically relates to a novel polymer-based composite material, a preparation method of the material and a method for deep defluorination of water body. Background technique [0002] Fluorine is an essential element for the human body. An appropriate amount of fluorine plays an important role in teeth and bones; however, if the intake of fluorine is excessive, it will have many adverse effects on the human body, such as: causing dental fluorosis, skeletal fluorosis, destroying Normal calcium and phosphorus metabolism. Fluorine pollution in water is widespread all over the world, and has attracted the attention of various countries. In 2006, the World Health Organization set a standard for fluorine content in drinking water of 1.5 mg / L, while my country proposed a more stringent control standard, limiting the fluor...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/58B01J20/26B01J20/28B01J20/30
Inventor 潘丙才徐敬生刘犀通张炜铭吕路聂广泽李志刚陆兴张淑娟
Owner NANJING UNIV
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