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Alkalization modifying method of luffa and use thereof

A technology of loofah and modification, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve the problems of high development cost, secondary pollution, environmental pollution, etc., achieve low price and increase income , Environmentally friendly effect

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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  • Alkalization modifying method of luffa and use thereof
  • Alkalization modifying method of luffa and use thereof
  • Alkalization modifying method of luffa and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: 1.0 gram of the natural loofah of cutting fine and 20 grams of mass percent concentration are mixed with NaOH ethanol solution of 30%, alkalized at 25 ℃ for 24h, obtain mixed system, transfer to three-necked flask then, in Reflux for 3 hours in a constant temperature water bath at 80°C for thermal alkalization treatment. Then the alkalized sample was washed 4 times with deionized water until the pH value was 7, and then dried at 70°C after suction filtration to obtain the alkali-treated loofah.

Embodiment 2

[0031] Embodiment 2: Atomic emission spectrometry determines the adsorption capacity of alkalized modified loofah to mixed metal ions

[0032] (1) Get 1.5g of the alkali-treated loofah obtained in Example 1, transfer it to a three-necked bottle, add 150mL of metal ion mixed solution, add an appropriate amount of HCl or HAc dropwise, adjust the pH value to about 3, and react at 70°C for 6 hours . The loofah was washed three times with deionized water until the pH was equal to 7, and then dried at 80°C for atomic emission spectrometry. (2) In the adsorption experiment, three different mixed solutions of metal ions were used:

[0033] 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)

[0034] b) Contains ZnCl 2 , Pb(Ac) 2 , CdCl 2 The mixed solution (the concentration of each metal ion is about 0.005M)

[0035] c) Contains Pb(Ac) 2 , Co(NO 3 ) 2 , AgNO 3 The test resul...

Embodiment 3

[0047] Embodiment 3: Atomic Absorption Spectroscopy (AAS) investigates its single ion Zn 2+ or Cu 2+ adsorption capacity

[0048] (1) Weigh 2 parts of the loofah of 0.4g embodiment 1 gain respectively, place in 100mL beaker, add the Zn that contains 5mmol respectively 2+ and Cu 2+ 40mL of a single metal ion solution, adjust the pH value to 4-6, and let it stand for adsorption at room temperature for 24 hours.

[0049] (2) Collect the filtrate in the beaker into a 100 mL volumetric flask, and wash the alkalized modified loofah twice with deionized water, 10 mL each time, and put the filtrate into the volumetric flask. Use atomic absorption spectrometry to measure the residual ion concentration, and then convert it into the adsorption amount of alkali-treated loofah on metal ions.

[0050] When using atomic absorption spectrometry to determine the concentration of metal ions, proceed through the following steps:

[0051] (1) Prepare standard solutions, measure the absorbanc...

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Abstract

The present invention provides a luffa alkalization modification method and an application in the metal ion adsorption, belongs 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 1-10 min, then obtaining alkalization luffa by reflowing, washing, filtering, drying in the thermostatic waterbath. 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 an alkalization modification method of loofah and its application, especially the application to the adsorption of metal ions in a water system, 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, the main methods for treating metal ion ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 刘引烽毛金浩杨红王立平戴玉霞
Owner SHANGHAI UNIV
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