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Method for deeply purifying phosphate radicals in water body by utilizing imino resin

A deep purification, imine-based technology, applied in the field of sewage treatment and resource reuse, can solve the problems of low treatment depth, instability, difficult regeneration and reuse, etc., and achieve the effect of large treatment capacity and stable adsorption materials

Active Publication Date: 2020-07-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low treatment depth, instability, and difficulty in regeneration and reuse in the traditional phosphate radical purification technology in water bodies, the present invention provides a method for deep purification of phosphate radicals in water bodies using imine-based resins, which can coexist in water bodies Competing anion Cl - , NO 3 - 、HCO 3 - , SO 4 2- , SiO 3 2- When the concentration of phosphate ion is much higher than the target phosphate ion, the deep purification of phosphorus in water can be realized in a wider pH range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for deeply purifying phosphate radicals in water using imine-based resins, the specific steps are as follows:

[0034] (1) Adjust the concentration of phosphorus-containing water (P(V) to 1ppm, Cl - , NO 3 - 、HCO 3 - ,, SO 4 2- , SiO 3 2- The concentration is 100ppm) pH value is adjusted to 7.0, filters, obtains filtrate;

[0035] (2) Put 50mL (about 25 grams) of imine-based resin into a jacketed glass adsorption column (Φ32×360mm), and at 25±5°C, flow 15BV / h The filtrate passes through the adsorption column containing imine-based resin bed, the treatment capacity is about 6500BV, and the concentration of P(V) in the effluent is reduced by less than 10ppb;

[0036] (3) When the adsorption reaches the leakage point (the P (V) concentration of the adsorbed water is greater than 10ppb), the adsorption is stopped, and the mixed solution of 300mL NaOH and NaCl (the weight percent concentration of NaOH and NaCl is 5%) is used at 25 ± 5 ° C. At a temperature...

Embodiment 2

[0038] Adopt the same method as Example 1 to carry out the deep purification of phosphate radicals in the water body, the difference is: in step (1), the temperature of adsorption is controlled at 5 ± 2 ℃, and its adsorption effect and treatment capacity are basically unchanged.

Embodiment 3

[0040] Adopt the same method as Example 1 to carry out the deep purification of phosphate radicals in the water body, the difference is: in step (1), the temperature of adsorption is controlled at 40 ± 5 ℃, and its adsorption effect and treatment capacity are basically unchanged.

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Abstract

The invention discloses a method for deeply purifying phosphate radicals in a water body by using imino resin. The method comprises the following steps: adjusting the pH value of a phosphorus-containing water body; enabling the filtrate to pass through an adsorption tower filled with imino resin to obtain a deeply purified water body, wherein a skeleton of the imino resin is polystyrene-divinylbenzene, and an imino group is grafted on the skeleton; and after reaching an adsorption leakage point, desorbing by using a desorbing agent, and carrying out regeneration treatment. According to the method disclosed by the invention, resin taking polystyrene-divinylbenzene as a skeleton and grafted with an imine group is used as an adsorption material to carry out deep purification treatment on phosphate radicals in a water body; it is found that when the water body value is 3.0-10.0 and high concentrations of Cl <->, NO3 <->, HCO3 <->, SO4 < 2-> and SiO3 < 2-> coexist, the phosphate radical content (based on P) of effluent can still be reduced to 0.01 mg / L or below from 0.05-50 mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and resource recycling, in particular to a method for deep purification of phosphate radicals in water using imide-based resins, specifically a method for utilizing imide-based resins with high adsorption capacity and selectivity for phosphate radicals. A method for deeply purifying phosphate radicals in water bodies with amino resin materials. Background technique [0002] Phosphorus is one of the essential nutrients for all organisms, and also one of the indispensable elements for human life activities and modern agriculture. Excessive phosphorus discharge into water will lead to serious water eutrophication and damage the ecological environment. Therefore, the deep purification of phosphorus in water is of great significance for water quality security. The conventional phosphorus removal process can no longer meet the increasingly stringent phosphorus discharge standards, and the adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F9/04C02F101/10
CPCC02F1/285C02F1/66C02F2101/105C02F2303/16Y02W10/10
Inventor 潘丙军廖雪陈都王楼李佳锋周丽佳
Owner ZHEJIANG UNIV OF TECH
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