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Method for preparing, using and regenerating Fe-Mn-Al composite oxide/zeolite antimony removal adsorbent

A composite technology of oxide and aluminum, applied in chemical instruments and methods, separation methods, filter regeneration and other directions, can solve the problems of difficult to popularize and apply on a large scale, a large amount of antimony-containing waste residue, complicated preparation process, etc., and the method is simple and easy to implement. , Excellent water purification efficiency, simple preparation process

Inactive Publication Date: 2012-07-11
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The precipitation method has a simple process and is easy to operate, but it is only suitable for high-concentration industrial wastewater, and produces a large amount of antimony-containing waste residue, which is likely to cause secondary pollution
3) The ion exchange method uses ion exchange resin as the adsorption exchange agent. This method is expensive and difficult to apply on a large scale in engineering practice.
The iron oxide and manganese oxide composite nanomaterial (patent application number: CN201010139529) invented by Cai Yaqi and others can effectively remove phosphorus, arsenic and antimony in water, and has the advantages of obvious nano effect, strong reactivity, large adsorption capacity and high selectivity, but the material The preparation process is complex and expensive, and it is difficult to apply it on a large scale in engineering practice

Method used

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  • Method for preparing, using and regenerating Fe-Mn-Al composite oxide/zeolite antimony removal adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of iron-manganese-aluminum composite oxide / zeolite antimony adsorbent: Weigh 27.8g FeSO 4 ·7H 2 O, 5.27g KMnO 4 , 24.3gAl 2 (SO 4 ) 3 ·7H 2 O, respectively dissolved in 500ml of water. m Fe :m Mn 3:1, m Al :m Mn is 3:2, (m Fe +m Al ):m OH - It is 1:1. Dissolve 6g NaOH in the potassium permanganate solution, then add the mixed solution of ferrous sulfate and aluminum sulfate, stir 200g zeolite (BET 200m 2 / g, 60 mesh or more) was added to the mixture, continued to stir for 30 minutes, then stood still and aged at room temperature for 16 hours. After aging, skim off the supernatant, then add a small amount of dilute sodium hydroxide solution to neutralize to neutral, then add 1000ml deionized water, stir and wash for 15 minutes, perform solid-liquid separation by filtration, and continue to add solid adsorbent Wash 4 times with deionized water, separate the adsorbent, put it in an oven and bake it at 50-55°C for 3 hours, then raise th...

Embodiment 2

[0031] Example 2: Preparation of iron-manganese-aluminum composite oxide / zeolite antimony adsorbent: Weigh 19.1g FeCl 2 4H 2 O, 5.27g KMnO 4 , 22.9gAlCl 3 ·6H 2 O, respectively dissolved in 500ml of water. m Fe :m Mn 3:1, m Al :m Mn is 3:2, (m Fe +m Al ):m OH - It is 1:1. Dissolve 6g NaOH in the potassium permanganate solution, then add the mixed solution of ferrous chloride and aluminum chloride, stir 300g zeolite (BET 170m 2 / g, 30 mesh or more) was added to the mixture, continued to stir for 45 minutes, then stood still and aged at room temperature for 24 hours. After aging, skim off the supernatant, then add a small amount of dilute sodium hydroxide solution to neutralize to neutral, then add 1000ml deionized water, stir and wash for 15 minutes, perform solid-liquid separation by filtration, and continue to add solid adsorbent Wash 4 times with deionized water, separate the adsorbent, put it in an oven and bake it at 50-55°C for 3 hours, then raise the temper...

Embodiment 3

[0033] Example 3: Preparation of iron-manganese-aluminum composite oxide / zeolite antimony adsorbent: Weigh 27.8g FeSO 4 ·7H 2 O, 5.27g KMnO 4 , 22.9gAlCl 3 ·6H 2 O, respectively dissolved in 600ml of water. m Fe :m Mn 3:1, m Al :m Mn is 3:2, (m Fe +m Al ):m OH - It is 1:1. Dissolve 6g NaOH in the potassium permanganate solution, then add the mixed solution of ferrous chloride and aluminum chloride, stir 260g zeolite (BET 230m 2 / g, 60 mesh or more) was added to the mixture, continued to stir for 1 hour, then stood still and aged at room temperature for 24 hours. After aging, skim off the supernatant, then add a small amount of dilute sodium hydroxide solution to neutralize to neutral, then add 800ml of deionized water, stir and wash for 15 minutes, perform solid-liquid separation by filtration, and continue to add solid adsorbent Wash 4 times with deionized water, separate the adsorbent, put it in an oven and bake it at 45-55°C for 2 hours, then raise the tempera...

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Abstract

The invention disclosed a method for preparing, using and regenerating novel antimony removing adsorbent-Fe-Mn-Al composite oxide / zeolite antimony removal adsorbent, belonging to the technical field of water treatment application. The Fe-Mn-Al composite oxide / zeolite antimony removal adsorbent also has oxidation and adsorption properties and has a moderate pore structure and rich active adsorption sites, therefore, excellent adsorption efficiency is provided to trivalent antimony and pentavalent antimony in a broad-spectrum pH range. The material can be used for removing antimony after being filled into an adsorption reactor and can be regenerated through a simple method after adsorption is saturated, and the operation is simple and practical.

Description

technical field [0001] The invention belongs to the field of materials for removing antimony and other pollutants in drinking water and industrial waste water by adsorption method, in particular to an iron-manganese-aluminum composite oxide antimony-removing adsorbent based on iron oxide, manganese oxide and aluminum oxide and its application method . Background technique [0002] Antimony is a widely distributed toxic element. Antimony is chronically toxic and carcinogenic to humans and organisms. Long-term drinking or exposure to low concentrations of antimony can cause fatal damage to the human liver and cardiovascular system. Many countries have set strict environmental standards for antimony. my country's latest drinking water standard stipulates that the concentration limit of antimony in drinking water is 5μg / L; the mandatory local pollutant discharge standard stipulates that the maximum allowable discharge concentration of antimony and its compounds is 0.65mg / L in t...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30B01J20/34C02F1/28C02F1/58
Inventor 曲久辉徐伟吴鹍兰华春刘会娟巩文信刘锐平
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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