Method for removing bivalent copper ions in aqueous solution

A copper ion, aqueous solution technology, applied in ion exchange, ion exchange regeneration, chemical instruments and methods, etc., can solve the problems of weak adsorption performance, weak bonding force, limited number and other problems, and achieve the effect of increasing adsorption capacity

Inactive Publication Date: 2013-07-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes methods called bimolecular chemistry or coordination polymers (CP) techniques. These processes involve modifying certain types of molecules like polysaccharides together through chemical reactions. By combining these modifications, they create new structures containing both hydrophilicity groups and metal atoms within them. They have several technical benefits including increased solubility due to their ability to form complexes without losing any water during use; lower costs compared to other treatments involving expensive resinous composites made up entirely of organocluthenium oxide alone; stable long term storage even if stored at very high concentrations above neutral levels; and enhanced degradability properties upon diluted solutions.

Problems solved by technology

This patented technical problem addressed in this patent relates to finding ways to effectively treat harmful substances such as Cu(II), which contamination occurs due to improper disposals during manufacturing processes that involve high levels of soluble impurities like chromium salts. To solve these issues, there have been developed methods involving modifying existing binder compositions containing chitin sulfate and bentoneites. However, current modifications often result in decreased effectiveness over time because they cannot prevent their negative impact upon biological functions within humans' bodies.

Method used

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  • Method for removing bivalent copper ions in aqueous solution
  • Method for removing bivalent copper ions in aqueous solution
  • Method for removing bivalent copper ions in aqueous solution

Examples

Experimental program
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Embodiment approach 1

[0031] (1) Prepare 0.4mol / L AlCl 3 solution, at a temperature of 55°C, add 0.4mol / L sodium hydroxide solution dropwise to AlCl at a rate of 1mL / min 3 solution until n(OH - ) : n(Al 3+ ) = 2.4, then aged at 55°C for 47h to obtain a polyhydroxyaluminum pillaring agent; take 1g of sodium bentonite, and add the polyhydroxyaluminum pillaring agent to the bentonite at a ratio of Al / soil of 10mmol / g, 55 Stir at ℃ for 3.5 hours, cool to room temperature, filter under reduced pressure, wash with distilled water until neutral, then filter with suction, dry the obtained filter cake at 40℃, grind to obtain polyhydroxyaluminum cross-linked bentonite, and set aside;

[0032] (2) Dissolve chitosan in an acetic acid solution with a mass fraction of 4%, the ratio is 1g of chitosan dissolved in 30 ml of an acetic acid solution with a mass fraction of 4%; place the prepared mixed solution in a stirring Add liquid paraffin to the three-necked flask with a thermometer and a thermometer, the rat...

Embodiment approach 2

[0038] (1) Prepare 0.4mol / L AlCl 3 solution, at a temperature of 65°C, add 0.4mol / L sodium hydroxide solution dropwise to AlCl at a rate of 1mL / min 3 solution until n(OH - ) : n(Al 3+ ) = 2.4, then aged at 65°C for 49h to obtain a polyhydroxyaluminum pillaring agent; take 1g of sodium bentonite, and add the polyhydroxyaluminum pillaring agent to the bentonite at a ratio of Al / soil of 10mmol / g, 65 Stir at ℃ for 4.5 hours, cool to room temperature, filter under reduced pressure, wash with distilled water until neutral, then filter with suction, dry the obtained filter cake at 70 ℃, grind to obtain polyhydroxyaluminum cross-linked bentonite, and set aside;

[0039] (2) Dissolve chitosan in an acetic acid solution with a mass fraction of 6%, and the ratio is to dissolve 1g of chitosan into 35ml of an acetic acid solution with a mass fraction of 6%; place the prepared mixed solution in a stirrer Add liquid paraffin to the three-necked flask with a thermometer, the ratio is 1g ch...

Embodiment approach 3

[0045] (1) Prepare 0.4mol / L AlCl 3 solution, at a temperature of 60°C, add 0.4mol / L sodium hydroxide solution dropwise to AlCl at a rate of 1mL / min 3 solution until n(OH - ) : n(Al 3+ ) = 2.4, then aged at 60°C for 48h to obtain a polyhydroxyaluminum pillar proppant; take 1g of sodium bentonite, add the polyhydroxyaluminum pillar proppant to the bentonite at a ratio of Al / soil of 10mmol / g, 60 Stir at a temperature of ℃ for 4 hours, cool to room temperature, filter under reduced pressure, wash with distilled water until neutral, then filter with suction, dry the obtained filter cake at 60 ℃, and grind to obtain polyhydroxyaluminum cross-linked bentonite, which is ready for use;

[0046] (2) Dissolve chitosan in an acetic acid solution with a mass fraction of 5%, the ratio is 1g of chitosan dissolved in 33ml of an acetic acid solution with a mass fraction of 5%; Add liquid paraffin to the three-necked flask with a thermometer, the ratio is 1g chitosan to 33ml liquid paraffin,...

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Abstract

The invention relates to a method for efficiently removing bivalent copper ions in aqueous solution. The method comprises the following steps of: (1) synthesizing cross-linked chitosan chelated resin through graft copolymerization of chitosan and epoxy chloropropane; (2) performing intercalation treatment on cross-linked chitosan and polyhydroxy aluminum cross-linked bentonite; (3) absorbing bivalent copper ions in aqueous solution by using the modified bentonite intercalated with the cross-linked chitosan; and (4) measuring the removal rate of bivalent copper ions. The modified bentonite obtained by the method provided by the invention is high in chitosan intercalation quantity, efficient and quick in absorbing and treating copper ions in aqueous solution, wide in pH application range, low in cost and the like, and can be widely applied to treatment of copper-containing industrial sewage.

Description

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Claims

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Application Information

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Owner TAIYUAN UNIV OF TECH
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