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Heavy metal ion absorbent and preparation method thereof

A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as secondary pollution, achieve the same effect, realize resource utilization, and eliminate secondary pollution The effect of pollution problems

Active Publication Date: 2017-02-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mud cake formed after mechanical filtration or centrifugal dehydration is usually landfilled as solid waste, which is likely to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A heavy metal ion adsorbent, mainly composed of 90 parts by mass of black water-based ink printing waste liquid extract, 10 parts of a mixture of pumice and sepiolite, the preparation method of which is: acid analysis of black water-based ink printing waste liquid The extract is made into a slurry with a certain solid content, and an appropriate alkaline substance is added to neutralize it to neutrality; pumice and sepiolite particles with a mass percentage of 11% are added to the sludge (based on the dry weight of the absolute dry sludge ) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 75°C for dehydration to make the sludge form a block, hot press the block sludge until the water content is lower than 50%, then dry it, and discharge the water; The sludge is isolated from the air and heated to 500°C for 2 hours; the sludge is broken into granules after falling to a certain temperature, and the wetting agent solution with a m...

Embodiment 2

[0016] A heavy metal ion adsorbent, mainly composed of 80 parts by mass of black water-based ink printing waste liquid extract, 20 parts of pumice and sepiolite mixture, the preparation method is: acid analysis of black water-based ink printing waste liquid The extract is made into a slurry with a certain solid content, and an appropriate alkaline substance is added to neutralize it to neutrality; pumice and sepiolite particles with a mass percentage of 25% are added to the sludge (based on the dry weight of the absolute dry sludge) ) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 75°C for dehydration to make the sludge form a block, hot press the block sludge until the water content is lower than 50%, then dry it, and discharge the water; The sludge is isolated from the air and heated to 520°C for 2 hours; the sludge is broken into granules after falling to a certain temperature, and the wetting agent solution with a mass concentra...

Embodiment 3

[0020] A heavy metal ion adsorbent, mainly composed of 85 parts by mass of black water-based ink printing waste liquid extract, 15 parts of pumice and sepiolite mixture, the preparation method is: acid analysis of black water-based ink printing waste liquid The extract is made into a slurry with a certain solid content, and an appropriate alkaline substance is added to neutralize it to neutrality; pumice and sepiolite particles with a mass percentage of 17.6% are added to the sludge (based on the dry weight of the absolute dry sludge ) Stir evenly to adjust the specific gravity of the sludge; while stirring, heat the sludge to 75°C for dehydration to make the sludge form a block, hot press the block sludge until the water content is lower than 50%, then dry it, and discharge the water; The sludge is isolated from the air and heated to 500°C for 2 hours; the sludge is broken into granules after falling to a certain temperature, and the wetting agent solution with a mass concentr...

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Abstract

The invention discloses a heavy metal ion absorbent and a preparation method thereof. The heavy metal ion absorbent is mainly prepared from 70-95 parts of water-based black ink printing effluent extract and 5-30 parts of pumice stone and sepiolite in parts by mass. The preparation method comprises steps as follows: the water-based black ink printing effluent extract is blended into paste with a certain solid content, and appropriate alkaline substances are added until the paste is neutral; a certain quantity of pumice stone and sepiolite granules are added to sludge and stirred to be uniform, so that the specific gravity of the sludge is adjusted; the sludge is heated to 50-90 DEG C while being stirred and then hydrated until the sludge becomes blocky, the blocky sludge is subjected to hot pressing until the water content is lower than 50% and then dried, and water obtained during dehydration is drained; the sludge is heated to 350-750 DEG C in a vacuum state and kept at the temperature for 1-5 h; the sludge is broken into granules after being cooled to be at a certain temperature, sprayed with a wetting agent solution in the mass concentration being 0.05%-0.2% and mixed uniformly. The prepared heavy metal ion absorbent can be recycled after regeneration.

Description

technical field [0001] The invention belongs to the technical field of environmental protection engineering, in particular to a heavy metal ion adsorbent and a preparation method thereof. Background technique [0002] The harm of heavy metal ions is serious, and usually mainly comes from electroplating wastewater, metal processing wastewater, etc. For the removal of heavy metal ions in wastewater, chemical precipitation, adsorption, ion exchange, reverse osmosis, etc. are usually used. [0003] Water-based ink is widely used in various fields because of its health, environmental protection and safety characteristics. At present, a large number of plastic packaging materials are increasingly using water-based inks in printing and printing, and a certain amount of high-concentration water-based ink printing waste is produced during the application process. This kind of printing waste liquid contains pollutants such as pigments, water-soluble acrylic resins, alcohols, and ami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/22C02F1/28C02F101/20C02F103/16
CPCB01J20/10B01J20/103B01J20/22C02F1/28C02F2101/20C02F2103/16
Inventor 柳荣展张宾邹译慧潘颖于梦楠石宝龙
Owner QINGDAO UNIV
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