A method and device for treating hypophosphorous and phosphorous in wastewater

A technology for treating wastewater and hypophosphorus, which is applied in chemical instruments and methods, metallurgical wastewater treatment, water/sewage treatment, etc., can solve the problems of low efficiency of advanced oxidation technology, and achieve low production cost, good treatment effect and easy production Effect

Active Publication Date: 2021-03-16
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the advanced oxidation technology has the disadvantages of low efficiency, and it is easy to produce a large amount of iron sludge combined with precipitation to form secondary pollution sludge. The treatment cost of advanced oxidation technology makes this treatment method unable to be practically promoted.

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  • A method and device for treating hypophosphorous and phosphorous in wastewater

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Embodiment 1

[0029] A method for treating hypophosphorous and phosphorous in waste water, comprising the following steps:

[0030] (1) Place the magnesium aluminum hydrotalcite in a crucible, calcinate it in a muffle furnace at 400°C for 4 hours, and grind it through a 200-mesh sieve after cooling to obtain a magnesium aluminum layered composite oxide;

[0031] (2) inject 20ml / L 30% hydrogen peroxide solution into the oxidation reaction pool (in waste water, hypophosphorus concentration 7.5mg / L, phosphorous acid concentration 2.5mg / L, nickel ion concentration is about 10mg / L waste water) and Stir, and transfer the wastewater to the adsorption reaction pool after 10 minutes of sufficient pre-oxidation;

[0032] (3) Put 20 g / L of the magnesium-aluminum layered composite into the adsorption reaction tank through the magnesium-aluminum layered composite oxide feeding part, use a stirring member to stir at 200 r / min for 4 hours to make the reaction fully, and let it stand for 1 hour to process ...

Embodiment 2

[0034] A method for treating hypophosphorous and phosphorous in waste water, comprising the following steps:

[0035] (1) Place the magnesium aluminum hydrotalcite in a crucible, calcinate it in a muffle furnace at 500°C for 4 hours, and after cooling, grind it through a 200-mesh sieve to obtain a magnesium aluminum layered composite oxide;

[0036] (2) in the oxidation reaction pool (in waste water, hypophosphorus concentration 7.5mg / L, phosphorous acid concentration 2.5mg / L, nickel ion concentration is about the waste water of 10mg / L) inject 40ml / L 30% hydrogen peroxide solution and Stir, and transfer the wastewater to the adsorption reaction pool after 10 minutes of sufficient pre-oxidation;

[0037] (3) Put 20 g / L of the magnesium-aluminum layered composite into the adsorption reaction tank through the magnesium-aluminum layered composite oxide feeding part, use a stirring member to stir at 200 r / min for 4 hours to make the reaction fully, and let it stand for 1 hour to pr...

Embodiment 3

[0039] A method for treating hypophosphorous and phosphorous in waste water, comprising the following steps:

[0040] (1) Place the magnesium aluminum hydrotalcite in a crucible, calcinate it in a muffle furnace at 500°C for 4 hours, and after cooling, grind it through a 200-mesh sieve to obtain a magnesium aluminum layered composite oxide;

[0041] (2) in the oxidation reaction pool (in waste water, hypophosphorus concentration 7.5mg / L, phosphorous acid concentration 2.5mg / L, nickel ion concentration is about the waste water of 10mg / L) inject 40ml / L 30% hydrogen peroxide solution and Stir, and transfer the wastewater to the adsorption reaction pool after 10 minutes of sufficient pre-oxidation;

[0042] (3) Put 40 g / L of the magnesium-aluminum layered composite into the adsorption reaction tank through the magnesium-aluminum layered composite oxide feeding part, use a stirring member to stir at 200 r / min for 4 hours to make the reaction fully, and let it stand for 1 hour to pr...

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Abstract

The invention belongs to the field of environmental functional materials, and particularly relates to a method and a device for treating hypophosphites and phosphites in wastewater. The method specifically comprises the following steps: adding hydrogen peroxide into wastewater containing hypophosphites and phosphites, and carrying out pre-oxidation to transform the hypophosphites into phosphites;and after the pre-oxidation, adding a magnesium-aluminum layered composite oxide to adsorb the phosphites. The device comprises a pre-oxidation reaction tank, an adsorption reaction tank, a hydrogen peroxide injection part and a magnesium-aluminum layered composite oxide feeding part, wherein the hydrogen peroxide is injected into the pre-oxidation reaction tank through the hydrogen peroxide injection part for carrying out a pre-oxidation reaction, and the magnesium-aluminum layered composite oxide is fed into the adsorption reaction tank through the feeding part for adsorbing the phosphites.According to the invention, the hypophosphites are transformed into the phosphites by utilizing the hydrogen peroxide, and then the novel and efficient treatment to the hypophosphite and phosphite wastewater is realized through the utilization of excellent adsorption performance of calcinated hydrotalcite to phosphites. The invention is of great significance to the treatment of electroplating hypophosphite and phosphite wastewater which is difficult to treat.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and in particular relates to a method and a device for treating hypophosphorous and phosphorous in waste water. Background technique [0002] The electroplating industry often adds a large amount of low-priced phosphate for better electroplating effect, and using a large amount of sodium hypophosphite as a reducing agent will lead to a large amount of hypophosphite phosphite in the wastewater, directly adding calcium and iron plasma The effect of its precipitation is not good. The treatment of hypophosphorous and phosphorous wastewater has always been a difficult problem in the treatment of electroplating wastewater in my country. [0003] The existing commonly used hypophosphorous phosphorous wastewater treatment technology is to use advanced oxidation technology, such as using UV / H 2 o 2 method, which converts hypophosphorous phosphorous into orthophosphorus and then adds li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04B01J20/08B01J20/28B01J20/30C02F101/10C02F103/16
CPCB01J20/041B01J20/08B01J20/28033C02F1/281C02F1/722C02F2101/105C02F2103/16
Inventor 黄柱坚梁健铭种云霄陈娴刘娟郭艺
Owner SOUTH CHINA AGRI UNIV
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