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Resin base phosphorus removal absorbent and preparation method thereof

A phosphorus adsorbent, resin-based technology, applied in the field of resin-based phosphorus removal adsorption materials and its preparation, adsorption materials and its preparation, can solve the problems of complex phosphorus removal process, large amount of sludge, poor water stability, etc. Good performance and large adsorption capacity

Inactive Publication Date: 2014-08-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biological phosphorus removal process is complicated, and the stability of the effluent is poor, and there are problems in the treatment of excess sludge; although the chemical precipitation method has a good treatment effect, the phosphorus removal agents used are mostly lime, aluminum salts, iron salts, For industrial products such as ferrous salt and magnesium salt, due to the high cost of phosphorus removal agents and the large amount of sludge, this method has caused a bottleneck in the actual production and application

Method used

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  • Resin base phosphorus removal absorbent and preparation method thereof
  • Resin base phosphorus removal absorbent and preparation method thereof
  • Resin base phosphorus removal absorbent and preparation method thereof

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preparation example Construction

[0021] A resin-based phosphorus removal adsorption material and a preparation method thereof, comprising the following steps:

[0022] (a) AlCl 3 , HCl, MgCl 2 dissolved in water to obtain solution A, AlCl in solution A 3 Concentration is 0.1-0.8mol / L, HCl concentration is 1-8mol / L, MgCl 2 The concentration is 1-3mol / L;

[0023] (b) Flow solution A through the strongly basic anion exchange resin placed in the adsorption column at a certain flow rate;

[0024] (c) centrifuging and dehydrating the strongly basic anion resin obtained after the above treatment until there is no free water;

[0025] (d) MgCl 2 and NaHCO 3 Dissolve in water to obtain solution B, MgCl in solution B 2 The concentration is 0.05-0.5mol / L, NaHCO 3 The content is 1%-10%wt;

[0026] (e) Add the strongly basic anion resin after dehydration in step (c) to solution B for reaction, preferably the reaction time is 0.5-2h, filter out the resin after the reaction is completed, wash with deionized water a...

Embodiment 1

[0029] (1) In a 2000ml beaker, add 26.7gAlCl 3 , 200ml of concentrated hydrochloric acid (36.5% by weight), 95g of MgCl 2 , fully dissolved and adjusted to 1L. AlCl in this solution 3 0.2mol / L, HCl 2mol / L, MgCl 2 1mol / L.

[0030] (2) Weigh 4.75gMgCl 2 , 10g NaHCO 3 Dissolve in water, dilute to 200ml volumetric flask to obtain solution B. MgCl in the solution 2 0.25mol / L.

[0031] (3) Take 15g of IRA400 strong basic anion exchange resin and place it in a glass adsorption column, pass the above solution A through the glass adsorption column at a speed of 2BV / h, dehydrate the resin after the reaction is complete, and then quickly add it to solution B, React at room temperature for 0.5 h, filter out the resin, wash with deionized water and industrial ethanol in sequence, and heat-treat in an oven at 50° C. for 12 h. That is, the phosphorus removal adsorption material was obtained, and the content of magnesium and aluminum on the adsorption material was 29.7 mg / g.

Embodiment 2

[0033] (1) In a 2000ml beaker, add 40g of AlCl 3 , 400ml of concentrated hydrochloric acid (36.5% by weight), 190g of MgCl 2 , fully dissolved and adjusted to 1L. AlCl in this solution 3 0.3mol / L, HCl 4mol / L, MgCl 2 2mol / L.

[0034] (2) Weigh 4.75g of MgCl 2 , 10 g NaHCO 3 Dissolve in water, dilute to 200ml volumetric flask to obtain solution B. MgCl in the solution 2 0.25mol / L.

[0035] (3) Take 15g of IRA900 strong basic anion exchange resin and place it in a glass adsorption column, pass the above solution A through the glass adsorption column at a speed of 1BV / h, dehydrate the resin after the reaction is complete, and then quickly add it to solution B, React at room temperature for 1 h, filter out the resin, wash with deionized water and industrial ethanol in sequence, and heat-treat in an oven at 52° C. for 14 h. The phosphorus removal adsorption material was obtained, and the content of magnesium and aluminum on the adsorption material was 59.4 mg / g.

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Abstract

The present invention discloses a resin base phosphorus removal absorbent and a preparation method thereof. According to the resin base phosphorus removal absorbent, a solution containing AlCl3, HCl and MgCl2 flows through a strongly alkaline anion resin placed in an absorption column until Al<3+> completely penetrates, then the obtained strongly alkaline anion resin is subjected to centrifugation dehydration, the free water removed strongly alkaline anion resin is rapidly added to a solution containing MgCl2 and NaHCO3 to carry out a reaction, and drying is performed after completing the reaction to obtain the phosphorus removal absorbent, wherein the total magnesium-aluminum load amount is 20-140 mg / g. According to the present invention, the magnesium-aluminum binary hydrous oxide is loaded on the resin, such that the obtained new absorbent provides higher absorption capacity and absorption selectivity than the resin with no load, wherein the absorption capacity is increased by 40-200%, and the absorption selectivity is increased by about 150 times.

Description

technical field [0001] The present invention relates to an adsorption material with anion exchange resin as the matrix and its preparation method, specifically, it is a resin-based phosphorus removal adsorption material and its preparation method, which is suitable for the phosphorus removal system of municipal sewage and industrial waste water, and belongs to Water treatment technology field. Background technique [0002] Phosphorus is an indispensable nutrient element for life, and it is a resource that is difficult to regenerate and is increasingly depleted. At the same time, with the development of social economy and the improvement of people's living standards, more and more phosphorus-containing sewage is discharged into water bodies, resulting in increasingly serious eutrophication of water bodies. Therefore, actively seeking ways to remove phosphorus from sewage and separate and recycle it can not only improve water quality, reduce pollution, but also realize phosph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/58
Inventor 孙越王文学钱荆宜李志超
Owner SOUTHEAST UNIV
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