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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, electrodialysis, etc. Although these methods have certain advantages, they all have some disadvantages, such as high cost , low removal rate, cumbersome operation and high energy consumption

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
Comparison scheme
Effect test

Embodiment 1

[0027] The activation of the nylon membrane and the modification of the bonded 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. Ten hydrolyzed nylon membranes were immersed in 20ml of formaldehyde solution (>36.5wt.%), added with 0.2ml of phosphoric acid (85wt.%), reacted at 60°C for 7h, and washed with hot water at 40-50°C for several times.

[0029] (2) The above-mentioned formaldehyde-activated nylon membrane is immersed in 10ml mass fraction of 1.5% chitosan solution (dissolved with 1vol.% acetic acid), reacted at room temperature for 1h, then transferred to an 80°C oven, took it out after 1h, and used 1vol .% acetic acid and deionized water to wash away unreacted chitosan. The content of chitosan on the nylon film can be tested according to the ninhydrin method.

Embodiment 2

[0031] Bond coupling agent is carried out the activation of chitosan membrane, concrete steps are as follows:

[0032] (1) 10 nylon membranes after the above modification are immersed in 4.6ml epichlorohydrin, 46ml molar concentration of 2mol / L sodium hydroxide and 0.017g sodium borohydride mixed solution, react at room temperature for 2h, and then directly mix Add 23ml of oxochloropropane and 46ml of sodium hydroxide with a molar concentration of 2mol / L to the liquid, 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 constant temperature oscillation at 60 ° C for 12 h, Wash with deionized water, 5vol.% acetic acid and deionized water several times.

Embodiment 3

[0035] Use the modified nylon affinity membrane to absorb copper ions and optimize the conditions. The specific steps are as follows:

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

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

[0038] (2) Determination of reaction initial copper sulfate solution concentration

[0039] Stack 3 modified nylon membranes to form a membrane stack, put them into the membrane bridge, and use a peristaltic pump to send in copper sulfate reaction solution with a concentration ranging from 30ml 25ppm to 200ppm, and circulate the reaction fo...

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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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