Method for rapidly removing metal copper ion from waste water

A technology for metal copper and copper ions, which is applied in the field of rapid removal of metal copper ions in wastewater, can solve the problems of high energy consumption, cumbersome operation and low removal rate, and achieves the effects of high efficiency, less time-consuming and simple operation.

Inactive Publication Date: 2008-08-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the industrial treatment methods of copper-containing wastewater mainly include chemical coagulation precipitation, ion exchange, electrolysis, reverse osmosis, elect

Method used

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  • Method for rapidly removing metal copper ion from waste water
  • Method for rapidly removing metal copper ion from waste water
  • Method for rapidly removing metal copper ion from waste water

Examples

Experimental program
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Example Embodiment

[0026] Example 1

[0027] Activation of nylon membrane and modification by bonding chitosan, the specific steps are as follows:

[0028] (1) The nylon membrane was first hydrolyzed in HCl with a molar concentration of 1mol / L at 25°C for 24h, and then activated with formaldehyde. 10 hydrolyzed nylon membranes are immersed in 20ml formaldehyde solution (>36.5wt.%), 0.2ml phosphoric acid (85wt.%) is added, reacted at 60°C for 7 hours, and washed with hot water at 40-50°C for several times.

[0029] (2) Immerse the above-mentioned formaldehyde-activated nylon membrane into 10ml of 1.5% chitosan solution (dissolved in 1vol.% acetic acid), react at room temperature for 1h, then transfer to 80℃ oven, take out after 1h, and use 1vol respectively. .% acetic acid and deionized water to wash away unreacted chitosan. The chitosan content on the nylon membrane can be tested according to the ninhydrin method.

Example Embodiment

[0030] Example 2

[0031] To activate the chitosan membrane by bonding a coupling agent, the specific steps are as follows:

[0032] (1) The 10 modified nylon membranes are immersed in a mixture of 4.6ml epichlorohydrin, 46ml of 2mol / L sodium hydroxide and 0.017g sodium borohydride, reacted at room temperature for 2h, and then directly mixed Add 23ml of reduced chloropropane and 46ml of sodium hydroxide with a molar concentration of 2mol / L to the solution, react at 60°C for 12h, and wash with deionized water several times.

[0033] (2) Immerse the above-mentioned cyclopropane-bound membrane into a mixed solution containing 86 mmol of iminodiacetic acid (IDA), 0.14 g of sodium borohydride and 114.4 ml of sodium carbonate with a molar concentration of 2 mol / L, and react with shaking at a constant temperature of 60°C for 12 hours. Wash with deionized water, 5vol.% acetic acid and deionized water several times.

Example Embodiment

[0034] Example 3

[0035] The modified nylon affinity membrane is used to adsorb copper ions, and the conditions are optimized. The specific steps are as follows:

[0036] (1) Determination of the amount of reaction film

[0037] Stack 1, 2, 3, 5, and 10 modified nylon membranes into a membrane stack, put them into the membrane bridge, and use a peristaltic pump to feed 30ml of 100ppm copper sulfate solution, and circulate the reaction for 3h, with a flow rate of 2.0ml / min, UV The spectrophotometer detects the amount of copper ion adsorption at a wavelength of 740nm. The results of the experiment are shown in Fig. 1, and the optimal film amount is 3 films (ie, 0.3g film).

[0038] (2) Determination of the concentration of copper sulfate solution at the beginning of the reaction

[0039] Stack 3 modified nylon membranes into a membrane stack, put them into the membrane bridge, and use a peristaltic pump to feed the copper sulfate reaction solution wi...

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Abstract

The invention relates to a method for quickly removing metallic copper ion. The steps include (1), nylon film activation and bonding chitosan, (2), activating nylon film of the bonding coupling agent for chitosan modification, (3), absorbing copper ions from waste water by using the nylon activation film, and eluting absorbed copper ion film, (4), testing copper ion adsorbing capacity and film regenerative capacity. The method is quick, easy, effective, can be reused and adapted for large-scale detection and removing metallic copper ions in waste water.

Description

technical field [0001] The invention belongs to a method for removing metal ions in waste water, in particular to a method for quickly removing metal copper ions in waste water. Background technique [0002] Copper is a valuable metal, which is the first subgroup element in the periodic system, and its application range is very wide. In daily life, copper plays an extremely important role. Natural water contains very little copper. The copper in water is mainly caused by the pollution of industrial wastewater, mainly from electroplating, smelting, hardware, chemical industry, mining and other departments. [0003] Copper in water cannot be decomposed by microorganisms. On the contrary, organisms can enrich it and convert it into more toxic heavy metal organic compounds. In a complex water environment, if it enters the water body, it will cause water pollution and easily enter the human body. Because it has a particularly high affinity with certain tissues in the human body...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/62B01J20/26
Inventor 朱利民何智妍聂华丽周毓婷
Owner DONGHUA UNIV
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