Method for adsorbing and recycling phenol in wastewater by polyamine macroporous resin

A macroporous resin and polyamino technology, which is applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of long treatment cycle, high treatment cost, large floor area, etc., and achieve desorption Convenience, high desorption rate and large adsorption capacity

Active Publication Date: 2010-12-01
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]These methods can all reduce the phenol content in wastewater, but there are also problems in varying degrees such as low efficiency, high treatment cost, large floor area, and long treatment cycle. Insufficient waiting time affects the popularization and use of technology

Method used

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  • Method for adsorbing and recycling phenol in wastewater by polyamine macroporous resin
  • Method for adsorbing and recycling phenol in wastewater by polyamine macroporous resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Weigh 20g of material I resin and fill it into a glass column with an inner diameter of 14mm to prepare adsorption column I;

[0029] 2. Adjust the aqueous solution with a phenol content of 3.0 mg / mL to pH=6.4, make it flow through the adsorption column I, and control the flow rate so that the phenol content of the effluent is controlled below 0.5 ppm until the adsorption column I is saturated. A total of 1.68 L of effluent was collected, and the adsorption capacity of material I was 252 mg / g;

[0030] Three, empty the remaining liquid in the adsorption column I, use the methanol-water mixture containing 0.4% sodium hydroxide (the volume ratio of water and methanol is 1: 1) to elute the resin in the adsorption column, collect eluent 186mL After acidification with 1N hydrochloric acid, the total amount of phenol was determined to be 4740 mg, and the elution rate was 94%.

Embodiment 2

[0032] 1. The adsorption column I used in Example 1 is washed with deionized water to neutrality, and is referred to as the adsorption column I 再 use again;

[0033] 2. Adjust the aqueous solution with a phenol content of 3.0 mg / mL to pH=6.4, and make it flow through the adsorption column I 再 , control the flow rate so that the phenol content of the effluent is controlled below 0.5ppm, to the adsorption column I 再 saturation. A total of 1.66L of effluent was collected, and the adsorption capacity of material I used again was 249mg / g;

[0034] 3. Vent the adsorption column I 再 For the liquid remaining in the medium, use methanol-water mixed solution containing 0.4% sodium hydroxide (the volume ratio of water and methanol is 1: 1) to adsorb the adsorption column I 再 The middle resin was eluted, and 195 mL of the eluate was collected, and after acidification with 1N hydrochloric acid, the total amount of phenol was determined to be 4730 mg, and the elution rate of material I ...

Embodiment 3

[0036] 1. Weigh 20g of material II resin and fill it into a glass column with an inner diameter of 14mm to prepare adsorption column II;

[0037] 2. Adjust the aqueous solution with a phenol content of 3.0 mg / mL to pH = 6.4, make it flow through the adsorption column II, control the flow rate so that the phenol content of the effluent is controlled below 0.5 ppm, until the adsorption column II is saturated. A total of 1.88 L of effluent was collected, and the adsorption capacity of material II was 281 mg / g;

[0038] 3. Empty the remaining liquid in the adsorption column II, elute the resin in the adsorption column II with methanol-water mixture containing 0.4% sodium hydroxide (the volume ratio of water and methanol is 1:1), and collect the eluate 193mL was acidified with 1N hydrochloric acid, and the total amount of phenol was determined to be 5240mg, and the elution rate was 93%.

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Abstract

The invention discloses a method for adsorbing, removing and recycling phenol in water by polyamine macroporous resin and relates to a method for processing phenol-contained wastewater. The polyamine macroporous resin is used as an adsorbent for processing phenol-contained water, phenol in water is adsorbed by the resin, and the phenol adsorbed on the resin is recycled by eluting. The method is carried out according to the following steps of: (1) adjusting the phenol-contained water to be weak acid and leading the phenol-contained water to pass through an adsorbing column filled with the polyamine macroporous resin; (2) after the polyamine macroporous resin in a device to be processed absorbs the wastewater to reach saturated, emptying residual liquid in an adsorbing device and eluting the resin in the adsorbing column by using the mixing liquid of water and methanol; (3) adjusting the polyamine macroporous resin subjected to elution processing to neutrality, which can be repeatedly used for processing the phenol-contained wastewater; and (4) concentrating an eluant for recycling sodium phenate which can be reused after adding acid for neutralization and purifying, By adopting thepolyamine macroporous resin as the adsorbent, the invention has the advantages of high adsorbing capability, convenient desorption and high desorbing rate.

Description

technical field [0001] The invention relates to a treatment method for adsorbing, removing and recovering a small amount of phenol contained in water, in particular to a method for absorbing, removing and recovering a small amount of phenol contained in water by using a polyamino macroporous resin. Background technique [0002] Chemical wastewater containing phenol is very serious to the environment, and has attracted extensive attention in the industry for many years. There are many methods for treating phenol-containing wastewater, mainly including steam removal method, liquid film method, extraction method, adsorption method, oxidation method, photochemical method and biochemical method. method), 85104016 (activated carbon fiber treatment of phenol-containing wastewater), 86108079 (adsorption method for recovering phenol from phenol-containing waste liquid), 93102939.2 (treatment method of high-concentration phenol-containing waste liquid), 93111832.8 (nitrodiazophenol I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C39/04C07C37/82C02F1/28C02F101/34
Inventor 孟启李丹凤陈娟娟吴桂勇孙小强
Owner 溧阳常大技术转移中心有限公司
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