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Preparation method and application of heavy metal ion absorbent

A technology of heavy metal ions and adsorbents, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. Fewer modification steps, faster speed, and improved adsorption efficiency

Active Publication Date: 2015-09-16
JIANGSU GOLDEN AUTUMN CORD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can remove heavy metal ions to varying degrees, they have their own advantages and disadvantages.
The main problem is that the equipment is complex and the operating cost is high
The cost of chemical method is high, it is difficult to meet the first-level discharge standard, and the waste is difficult to deal with, causing secondary pollution

Method used

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  • Preparation method and application of heavy metal ion absorbent
  • Preparation method and application of heavy metal ion absorbent
  • Preparation method and application of heavy metal ion absorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adsorbent OSA-NH 4 - Preparation of CS-1

[0026] Add 100mL absolute ethanol to 20g sodium alginate (SA) powder, magnetically stir to disperse evenly, add 100mL concentration of 0.8mol / L sodium periodate (NaIO 4 ) solution, reacted at room temperature in the dark for 12 hours, added 4.5 mL of ethylene glycol, and continued to react for 2 hours. The solution was suction filtered, the product was fully stirred and washed with 50% ethanol, and the suction filtration was repeated twice. The obtained product was dried in an oven at 55° C. for 24 hours to obtain aldehyde sodium alginate (OSA).

[0027] Take 5g of OSA in 80mL of water to make a homogeneous solution, add 80mL of tetraethylenepentamine aqueous solution with a concentration of 1mol / L, and react with magnetic stirring in a water bath at 40°C for 24h, then cool to room temperature. Add 3.02g NaBH in batches 4 , and continue to react for 24h to obtain amino sodium alginate.

[0028] In the above reacted solutio...

Embodiment 2

[0033] Adsorbent OSA-NH 4 - Preparation of CS-2

[0034] Add 100mL of absolute ethanol to 18g of sodium alginate (SA) powder, magnetically stir to disperse evenly, add 263mL of sodium periodate (NaIO 4 ) solution, reacted at room temperature in the dark for 12 hours, added 4.1 mL of ethylene glycol, and continued to react for 2 hours. The solution was suction filtered, the product was fully stirred and washed with 50% ethanol, and the suction filtration was repeated twice. The obtained product was dried in an oven at 55° C. for 24 hours to obtain aldehyde sodium alginate (OSA).

[0035] Take 5g OSA in 80mL water to make a homogeneous solution, add 34mL triethylenetetramine aqueous solution with a concentration of 1mol / L, stir and react in a water bath at 40°C for 24h, then cool to room temperature. Add 3.02g NaBH in batches 4 , and continue to react for 24h to obtain amino sodium alginate.

[0036] In the above reacted solution, add CS 2 mixed solution with NaOH, the mix...

Embodiment 3

[0038] Adsorbent OSA-NH 4 - Preparation of CS-3

[0039]Add 100mL of absolute ethanol to 25g of sodium alginate (SA) powder, magnetically stir to disperse evenly, add 183mL of sodium periodate (NaIO 4 ) solution, reacted at room temperature in the dark for 12 hours, added 5.6 mL of ethylene glycol, and continued to react for 2 hours. The solution was suction filtered, the product was fully stirred and washed with 50% ethanol, and the suction filtration was repeated twice. The obtained product was dried in an oven at 55° C. for 24 hours to obtain aldehyde sodium alginate (OSA).

[0040] Take 5g of OSA in 80mL of water to make a homogeneous solution, add 53mL of 1mol / L tetraethylenepentamine aqueous solution, stir the reaction in a water bath at 40°C for 24h, then cool to room temperature. Add 3.02g NaBH in batches 4 , and continue to react for 24h to obtain amino sodium alginate.

[0041] In the above reacted solution, add CS 2 mixed solution with NaOH, the mixed solution...

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Abstract

The invention relates to the technical field of high-molecular material modification, and especially relates to a preparation method and an application of a heavy metal ion absorbent. The preparation method comprises the following steps: (1) aldehyde sodium alginate is prepared into a water solution; polyethylene polyamine is added and a reaction is carried out; sodium borohydride is added for reducing; and the reaction is continued, such that amino sodium alginate is obtained; (2) a mixed solution of carbon disulfide and sodium hydroxide is added into the solution obtained after the reaction in the step (1); the reaction is continued until carbon disulfide droplets in the solution are disappeared; the reaction is stopped, and an alcohol solvent is added, such that a product is precipitated; the mixture is allowed to stand and to layer; the precipitate precipitated at the bottom layer is separated; drying is carried out, such that the heavy metal absorbent is obtained. The absorbent has high absorbability upon heavy metal ions, and desorption efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a preparation method and application of a heavy metal ion adsorbent. Background technique [0002] Among the various pollutants in water, heavy metal ions are the most harmful. Modern medical research shows that some heavy metal ions entering the human body can cause cancer, teratogenicity, and chromosomal mutation, and the incubation period can reach decades. There are tens of thousands of electroplating enterprises in my country. The output of heavy metal ions in wastewater is huge. Heavy metal ion pollution incidents occur in our country from time to time. There are still many enterprises that do not manage heavy metal ions effectively and discharge beyond the standard. Therefore, there are huge hidden dangers of environmental damage. [0003] At present, the methods used to treat heavy metal ion wastewater include ion exchange method, membrane separatio...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J20/30C02F1/28C02F1/62
Inventor 倪才华张丽萍朱昌平田贞乐
Owner JIANGSU GOLDEN AUTUMN CORD CO LTD
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