Resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and preparation method

A composite adsorption, resin-based technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., to achieve the effect of enhancing adsorption capacity, good adsorption and removal effect, and adsorption performance will not decrease

Active Publication Date: 2017-01-04
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of the coexistence of phosphorus and fluorine pollutants in wastewater, and to provide a resin-based composite adsorbent for synchronous deep removal of phosphorus and fluorine in water and its preparation method. The composite material has a large adsorption capacity , strong selectivity, and simultaneous removal of phosphorus and fluorine, it can be applied to the deep phosphorus and fluoride removal of drinking water and industrial wastewater

Method used

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  • Resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and preparation method
  • Resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and preparation method
  • Resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and preparation method

Examples

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Effect test

Embodiment 1

[0030] (1) Prepare six groups of phosphorus-containing and fluorine-containing simulated wastewater with different concentrations, and the pH value is 5.8±0.2.

[0031] (2) prepare composite material, the steps are as follows:

[0032](a) Take 15mL of titanium tetrachloride and add it to hydrochloric acid-dehydrated ethanol acidic solution, including 50mL of hydrochloric acid and 150mL of dehydrated ethanol; weigh 15g of strong basic anion exchange resin, add it to the acidic solution, and rotate at 20°C Stir at 400 rpm for 12 hours, filter, and bake at 50°C for 2 hours. (b) Transfer the resin dried in the previous step to 300mL NaCl (8wt%)+(8wt%)NaOH solution, stir for 3 hours, filter, wash with deionized water until neutral, rinse with absolute ethanol, and dry at 60°C Dry to constant weight. (c) Take 10mL of hydrochloric acid, 40mL of ethanol, and 200mL of water to make a solution, add 30g of zirconium oxychloride, add the resin dried in the previous step, put it in a wat...

Embodiment 2

[0035] (1) Preparation containing competing ion SO 4 2- Phosphorus-containing and fluorine-containing simulated wastewater, the concentration of phosphorus is 10mg / L, the concentration of fluorine is 15mg / L, SO 4 2- The concentration is 600mg / L, and the pH value is 6.

[0036] (2) prepare composite adsorbent, the steps are as follows:

[0037] (a) Take 30mL of titanium tetrachloride and add it to hydrochloric acid-dehydrated ethanol acidic solution, including 50mL of hydrochloric acid and 250mL of dehydrated ethanol; weigh 15g of strong basic anion exchange resin, add it to the acidic solution, and rotate at 40°C Stir at 200 rpm for 48 hours, filter, and bake at 50°C for 2 hours. (b) Transfer the resin dried in the previous step to 450 mL of NaCl (4wt%) + (4wt%) NaOH solution, stir for 6 hours, filter, wash with deionized water until neutral, rinse with absolute ethanol, and dry at 40°C Dry to constant weight. (c) Take 10mL of hydrochloric acid, 60mL of ethanol, and 200m...

Embodiment 3

[0040] (1) Prepare phosphorus-containing and fluorine-containing simulated wastewater, the phosphorus concentration is 2 mg / L, the fluorine concentration is 3 mg / L, and the pH value of the simulated wastewater is 6.

[0041] (2) prepare composite adsorbent, the steps are as follows:

[0042] (a) Take 20mL of titanium tetrachloride and add it to hydrochloric acid-absolute ethanol acidic solution, including 40mL of hydrochloric acid and 160mL of absolute ethanol; weigh 10g of strong basic anion exchange resin, add it to the acidic solution, and rotate at 40°C Stir at 300 rpm for 20 hours, filter, and bake at 30°C for 5 hours. (b) Transfer the resin dried in the previous step to 300mL NaCl (6wt%) + (6wt%) NaOH solution, stir for 4 hours, filter, wash with deionized water until neutral, rinse with absolute ethanol, and dry at 60°C Dry to constant weight. (c) Take 10mL of hydrochloric acid, 40mL of ethanol, and 200mL of water to make a solution, add 20g of zirconium oxychloride, ...

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Abstract

The invention relates to a resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and a preparation method thereof. The preparation method includes: weighing resin, adding the resin into a prepared titanium tetrachloride-hydrochloric acid-anhydrous alcohol solution, stirring in constant-temperature water bath, filtering, drying, adding a prepared NaCl+NaOH solution, stirring, filtering, cleaning, rinsing, and drying; weighing zirconium oxychloride, adding into a a hydrochloric acid-alcohol-water solution, adding the resin which is dried to constant weight, stirring in water bath, filtering, drying, adding into a NaOH solution, stirring, filtering out, washing with water to neutral, using a NaCl solution and alcohol for rinsing, filtering, and drying to constant weight to obtain the resin-based composite adsorbent. A carrier of the adsorbent is macroporous anion exchange resin with quaternary ammonium functional group, and nanoparticles of titanium oxide and zirconium oxide are distributed on the surface and in pores of the carrier; the composite adsorbent has the advantages of high adsorption capacity, high selectivity and capability of synchronously removing phosphorus and fluorine and can be applied in deep phosphorus and fluorine removing treatment of drinking water and industrial wastewater.

Description

technical field [0001] The invention relates to a resin-based composite adsorbent for synchronously deep removal of phosphorus and fluorine in water and a preparation method thereof, belonging to the fields of deep phosphorus and fluorine removal of drinking water and industrial wastewater, novel composite adsorption materials and their preparation. Background technique [0002] Phosphorus and fluorine are inherent substances in the entire earth's ecosystem and widely exist in nature, and they are also indispensable nutrients in organisms. However, as a nutrient, excessive discharge of phosphorus into natural water bodies will lead to eutrophication of water bodies, which in turn will lead to a decline in water quality and an imbalance in water ecology. At the same time, if the fluorine content in the water is too high, after entering the human body through the food chain, it will cause the human body to suffer from diseases such as dental fluorosis and bone fluorosis, and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/58C02F1/28
CPCB01J20/06B01J20/26C02F1/28C02F1/281C02F1/285
Inventor 徐炎华聂广泽陈家凯刘志英
Owner NANJING UNIV OF TECH
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