Preparation method of chromium ion removing adsorbent

A technology of adsorbent and chromium ion, which is applied in the field of preparation of adsorbent for removing chromium ion, and achieves the effects of wide distribution, expanded application value, and large specific surface area

Inactive Publication Date: 2016-11-16
广西南宁桂尔创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the existing adsorbents, the present invention provides an adsorbent for removing chromium ions with large specific surface area, large adsorption capacity, high adsorption efficiency, low cost, simple preparation process, safety and environmental protection

Method used

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  • Preparation method of chromium ion removing adsorbent

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Effect test

Embodiment 1

[0031] A preparation method for removing chromium ion adsorbent, the specific operation steps are as follows:

[0032] (1) Crush 100 kg of banana stems with a water content of 12% to 40 meshes, add 3 mol / L sodium hydroxide solution and soak for 5 hours, then wash the banana stem powder with water until neutral to obtain banana stem powder cellulose; Add 8kg of maleic acid to the stem powder cellulose, then add 100kg of water, mix evenly, and dry at 80°C for 2 hours to obtain modified banana stem powder;

[0033] (2) Take 60kg of water hyacinth powder and 10kg of thiourea and add them to an ultrasonic mixer, then add 120kg of water, react at an ultrasonic frequency of 40kHz for 60min, place the reacted paste in an oven at 60°C and heat and dry for 3h to obtain modified water hyacinth powder;

[0034] (3) Add the above-mentioned modified banana stalk powder residue and modified water hyacinth powder to the mixer, add 5 kg of ammonium cerium nitrate solution and 8 kg of chitosan...

Embodiment 2

[0036] A preparation method for removing chromium ion adsorbent, the specific operation steps are as follows:

[0037] (1) Crush 100 kg of banana stems with a water content of 12% to 40 meshes, add 5 mol / L sodium hydroxide solution to soak for 4 hours, then wash the banana stem powder with water until neutral to obtain banana stem powder cellulose; Add 5kg of maleic acid to the stem powder cellulose, then add 80kg of water, mix evenly, and dry at a temperature of 100°C for 1 hour to obtain modified banana stem powder;

[0038] (2) Take 65kg of water hyacinth powder and 12kg of thiourea, add them to an ultrasonic mixer, then add 150kg of water, react at an ultrasonic frequency of 60kHz for 30min, place the reacted paste in an oven at 80°C and heat and dry for 2h to obtain modified water hyacinth powder;

[0039] (3) Add the above-mentioned modified banana stalk powder residue and modified water hyacinth powder to the mixer, add 6 kg of ammonium cerium nitrate solution and 5 kg...

Embodiment 3

[0041] A preparation method for removing chromium ion adsorbent, the specific operation steps are as follows:

[0042] (1) Crush 100 kg of banana stems with a water content of 12% to 60 mesh, add 5 mol / L sodium hydroxide solution to soak for 6 hours, and then wash the banana stem powder with water until neutral to obtain banana stem powder cellulose; Add 10kg of maleic acid to the stem powder cellulose, then add 100kg of water, mix evenly, and dry at a temperature of 90°C for 1.5h to obtain modified banana stem powder;

[0043] (2) Take 70kg of water hyacinth powder and 12kg of thiourea and add them to an ultrasonic stirrer, then add 150kg of water, and react for 45min at an ultrasonic frequency of 50kHz, place the reacted paste in an oven at 70°C for 2.5h, and heat and dry it for 2.5h. water hyacinth powder;

[0044](3) Add the above-mentioned modified banana stalk powder residue and modified water hyacinth powder to the mixer, add 8 kg of ammonium cerium nitrate solution an...

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Abstract

The invention discloses a preparation method of an adsorbent for removing chromium ions, which comprises crushing banana stalks, adding sodium hydroxide solution to soak them, washing the banana stalk powder with water to neutrality, and adding maleic dihydrogen to the banana stalk powder cellulose. acid, add water and dry at a temperature of 80-100°C for 1-2 hours to obtain modified banana stalk powder; take water hyacinth powder and thiourea and add them to an ultrasonic stirrer, then add an appropriate amount of water for ultrasonic reaction, and place the reacted paste in Heat and dry in an oven at 60-80°C for 2-3 hours to obtain modified water hyacinth powder; add the above-mentioned modified banana stalk powder residue and modified water hyacinth powder to the mixer, add cerium ammonium nitrate and chitosan, and then add water Make it into a paste, put it into microwave heating equipment, microwave at a temperature of 120-140°C for 30-60min, cool to room temperature, and grind to obtain the chromium ion adsorbent. The adsorbent of the invention has the advantages of wide source of raw materials, low cost, large specific surface area, large adsorption capacity, high adsorption efficiency, simple preparation process, etc., and has good adsorption performance for hexavalent chromium ions.

Description

technical field [0001] The invention relates to the technical field of adsorption materials, in particular to a preparation method of an adsorbent for removing chromium ions. Background technique [0002] In recent years, with the development of the heavy metal industry and the arbitrary discharge of heavy metal wastewater without treatment, the content of heavy metal ions in natural water bodies has increased, and water pollution incidents have occurred frequently. Heavy metals are one of the important causes of environmental pollution. When heavy metals enter the environment, they cannot be biodegraded into harmless substances. At the same time, suspended particles in the water absorb and precipitate heavy metal ions, making the water polluted by heavy metals for a long time. And so it came about. What's more, the heavy metals that exist in living organisms are accumulated and enriched, and they also participate in the cycle of the biosphere, endangering human health, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/22
CPCB01J20/24B01J2220/4825B01J2220/485B01J2220/4887C02F1/286C02F2101/22
Inventor 凌雪木
Owner 广西南宁桂尔创环保科技有限公司
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