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Method for preparing etherification luffa and application of it in metallic ion adsorption

A loofah, etherification technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high development cost, environmental pollution, secondary pollution, etc., and achieve low price and environmental friendliness. , the effect of increasing revenue

Inactive Publication Date: 2008-08-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main methods for treating metal ion wastewater are precipitation method, electrolysis method, electrodialysis method, ion exchange method, magnetic separation method, biochemical method and adsorption method, etc. These methods are costly and some methods are easy to cause secondary pollution.
Although some synthetic adsorbents or ion exchange resins have better adsorption performance than natural polymers, they will bring some pollution to the environment during their production process, and the development cost is also high

Method used

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  • Method for preparing etherification luffa and application of it in metallic ion adsorption
  • Method for preparing etherification luffa and application of it in metallic ion adsorption
  • Method for preparing etherification luffa and application of it in metallic ion adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Alkali treatment: cut the natural loofah into small pieces, crush it with a pulverizer and sieve it, mix 20-30 mesh loofah with an appropriate amount of 30% NaOH ethanol solution, and alkalize it at 25°C 24h; then transferred to a three-necked flask, refluxed in an 80°C constant temperature water bath for 3h, washed 4 times with deionized water until neutral, and dried at 70°C after suction filtration to obtain the alkali-treated loofah;

[0034] Preparation of etherified loofah: 2.4g alkali-treated loofah is fully dispersed in a 250mL three-necked flask with an appropriate amount of 8% NaOH solution, and the alcohol solution of monochloroacetic acid is gradually added dropwise. Monochloroacetic acid and Alkali-treated loofah with a molar ratio of 5:1, reacted at 70°C for 5h, cooled to room temperature, filtered with suction, discarded the reaction solution, washed 5 times with deionized water until neutral, and dried at 70°C , to obtain etherified loofah. The physical...

Embodiment 2

[0036] Alkali treatment: cut the natural loofah into small pieces, sieve after pulverizing with a pulverizer, mix 20-30 mesh loofah with an appropriate amount of 30% NaOH ethanol solution in mass percentage, and transfer it to a three-necked flask. Intermittently irradiate with 600W microwave for 5 minutes; then transfer to a three-necked flask, reflux in 80°C constant temperature water bath for 3h, wash with deionized water 4 times until neutral, and dry at 70°C after suction filtration to obtain alkali-treated loofah ;

[0037] Preparation of etherified loofah: 2.4g alkali-treated loofah is fully dispersed in a 250mL three-necked flask with an appropriate amount of 8% NaOH solution, and the alcohol solution of monochloroacetic acid is gradually added dropwise. Monochloroacetic acid and Alkali-treated loofah with a molar ratio of 5:1, reacted at 70°C for 5h, cooled to room temperature, filtered with suction, discarded the reaction solution, washed 5 times with deionized water...

Embodiment 3

[0039] Determination of Adsorption Ability of Etherified Loofah on Mixed Metal Ions by Atomic Emission Spectrometry

[0040] (1) Take 1.5g of etherified loofah, transfer it to a three-necked bottle, add 150mL of metal ion mixed solution, add an appropriate amount of HCl or HAc dropwise, and place in an oil bath at 70°C for 6 hours. The etherified loofah was washed three times with deionized water, and dried at 80°C. for atomic emission spectrometry.

[0041] (2) In the adsorption experiment, three different mixed solutions of metal ions were used:

[0042] a) contains Ca 2+ 、Na + 、Cu 2+ , Mn 2+ 、Ba 2+ , Fe 3+ , Zn 2+ 、Cd 2+ Hydrochloride solution (the concentration of each metal ion is about 0.01M)

[0043] b) Contains ZnCl 2 , Pb(Ac) 2 , CdCl 2 The mixed solution (the concentration of each metal ion is about 0.005M)

[0044] c) Contains Pb(Ac) 2 , Co(NO 3 ) 2 , AgNO 3 The test results of the mixed solution (each metal ion concentration is about 0.01M) show t...

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Abstract

The present invention provides a etherifying luffa method and an application in the metal ion adsorption, belonging to natural high polymer material modification or wastewater disposal technical field. The method is mixing the natural luffa with m moderate NaOH alcohol solution, alkalization under the temperature 25-80 Celsius degree, or alkalization by microwave interval radiation, then obtaining alkalization luffa by reflowing, washing, filtering, drying in the thermostatic waterbath; the etherifying luffa is obtained by dispersing with NaOH solution, reacting with the chloroacetic acid alcoholic solution, filtering, washing, drying. The luffa comes from variety of natural resources, and biodegradation, and treating process is relatively simple, partly substituting high molecular synthetic material in aspect of the sewage treatment, and having advantages such as friendly to the environment.

Description

technical field [0001] The invention relates to a preparation method of two kinds of etherified loofah and its application in the adsorption of metal ions, especially the application to the adsorption of metal ions in water systems, and belongs to the technical field of natural polymer material modification or water treatment. Background technique [0002] Resource shortage and environmental pollution have become two major problems in the world today. Therefore, using natural renewable resources to develop environmentally friendly products and technologies will become an inevitable trend of sustainable development. Cellulose is the most abundant renewable resource on earth, and it is cheap, biodegradable and environmentally friendly. [0003] In recent years, water pollution accidents have occurred frequently in our country. More than 70% of the rivers in our country have been polluted to varying degrees. The water pollution situation of rivers is very serious. At present, ...

Claims

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Application Information

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IPC IPC(8): B01J20/30C02F1/28
Inventor 刘引烽毛金浩杨红王立平戴玉霞
Owner SHANGHAI UNIV
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