Adsorbent for absorbing heavy metal ions and preparation method thereof

A technology for adsorbing heavy metals and adsorbents, applied in the field of adsorbents and their preparation, can solve the problems of high processing cost and difficult regeneration, and achieve the effect of good adsorption performance

Inactive Publication Date: 2013-09-11
马玉山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To remove heavy metal ions in industrial wastewater, chemical drug coagulation precipitation, activated carbon ads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Grind 15 parts of bentonite and 10 parts of retort clay into powder, and mix the obtained bentonite and retort clay powder with 15 parts of SBA-15 molecular sieve evenly, and then knead to prepare a composite. Roasting at ℃ for 3 hours; prepare calcium chloride and aluminum chloride solutions respectively, mix the two solutions at a ratio of 5:6 to obtain a mixed solution, add ammonia precipitant to the mixed solution, let it stand for 4 hours, and use the deposition method. Calcium and aluminum are supported on the composite, and the solid obtained after filtration is dried at 80°C for 18 hours, calcined at 850°C for 4 hours, ground and sieved to obtain an adsorbent for adsorbing heavy metal ions. When adsorbing chromium ions in wastewater, the adsorption rate can reach 97.3%.

Embodiment 2

[0016] Grind 25 parts of bentonite and 15 parts of retort clay into powder, and mix the obtained bentonite and retort clay powder with 18 parts of SBA-15 molecular sieve evenly to prepare a compound by kneading method. Roasting at ℃ for 4 hours; prepare calcium chloride and aluminum chloride solutions respectively, mix the two solutions at a ratio of 8:7 to obtain a mixed solution, add ammonia water precipitant to the mixed solution, let stand for 5 hours, and use the deposition method. Calcium and aluminum are supported on the composite, and the solid obtained after filtration is dried at 100°C for 20 hours, calcined at 950°C for 5 hours, ground and sieved to obtain an adsorbent for adsorbing heavy metal ions. When adsorbing chromium ions in wastewater, the adsorption rate can reach 97.6%.

Embodiment 3

[0018] Grind 35 parts of bentonite and 20 parts of retort clay into powder, and mix the obtained bentonite and rector clay powder with 20 parts of SBA-15 molecular sieve evenly, and then knead to prepare the composite. Roasting at ℃ for 5 hours; prepare calcium chloride and aluminum chloride solutions respectively, mix the two solutions at a ratio of 9:8 to obtain a mixed solution, add ammonia water precipitant to the mixed solution, let it stand for 6 hours, and use the deposition method. Calcium and aluminum are supported on the composite, and the solid obtained after filtration is dried at 120°C for 24 hours, calcined at 1000°C for 6 hours, ground and sieved to obtain an adsorbent for adsorbing heavy metal ions. When adsorbing chromium ions in wastewater, the adsorption rate can reach 97.4%.

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PUM

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Abstract

The invention relates to an adsorbent and a preparation method thereof and particularly relates to an adsorbent for absorbing heavy metal ions and a preparation method thereof. The adsorbent for absorbing the heavy metal ions comprises the following components in parts by weight: 5-9 parts of calcium, 6-8 parts of aluminum, 15-20 parts of SBA (Santa Barbara amorphous material)-15 molecular sieves, 15-35 parts of bentonite and 10-20 parts of rectorite. The adsorbent provided by the invention has an excellent adsorptive property; and when the adsorbent is used for absorbing chromium ions in water, the adsorption rate can reach 97.6%.

Description

technical field [0001] The invention relates to an adsorbent and a preparation method thereof, in particular to an adsorbent for adsorbing heavy metal ions and a preparation method thereof. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. It is mainly caused by human factors such as mining, exhaust gas discharge, sewage irrigation and use of heavy metal products. Heavy metal pollution is mainly manifested in water pollution, and partly in the atmosphere and solid waste. [0003] To remove heavy metal ions in industrial wastewater, methods such as chemical drug coagulation precipitation and activated carbon adsorption are generally used. Not only the treatment cost is high, but regeneration is also difficult. Contents of the invention [0004] The object of the present invention is to provide a cheap and reproducible adsorbent for adsorbing heavy metal ions and a preparation method thereof. T...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30C02F1/28C02F1/62
Inventor 马玉山
Owner 马玉山
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