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Application of luffa as adsorbent in metallic ion adsorption

A technology of metal ions and loofah, applied in the direction of adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, 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: 2008-09-17
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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  • Application of luffa as adsorbent in metallic ion adsorption
  • Application of luffa as adsorbent in metallic ion adsorption
  • Application of luffa as adsorbent in metallic ion adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the method for static adsorption carries out water treatment

[0026] Cut the natural loofah into small pieces, and measure its adsorption capacity for mixed metal ions. The method is: (1) Take 1.5g of loofah, transfer it to a three-necked bottle, add 150mL of metal ion mixed solution, and drop an appropriate amount of HCl or HAc , adjust the pH value of the mixed solution to 3-4. Stir at a temperature of 70°C for 6 hours. The loofah was washed three times with deionized water and dried at 80°C. for atomic emission spectrometry.

[0027] (2) In the adsorption experiment, three different mixed solutions of metal ions were used:

[0028] 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)

[0029] b) Contains ZnCl 2 , Pb(Ac) 2 , CdCl 2 The mixed solution (the concentration of each metal ion is about 0.005M)

[0030] c) Contains Pb(Ac) 2 , Co(NO 3 ) ...

Embodiment 2

[0044] Embodiment 2: Atomic Emission Spectroscopy (AES) investigates its adsorption-desorption reaction

[0045] (1) Weigh 4 portions of about 1.00g loofah, place them in 1#, 2#, 3#, 4# three-neck bottles, add 100mL Pb(Ac) respectively 2 , CuCl 2 , ZnCl 2 , FeCl 3 Adsorption is carried out in four kinds of single metal ion solutions, the solution concentration is 1.4mmol, 1.2mmol, 5.3mmol, 2.9mmol in turn, and an appropriate amount of HCl or HAc is added dropwise to adjust the pH value to 3~4, and the adsorption is in the range of 40~45℃ 20 hours.

[0046] (2) Discard the reaction solution in each three-neck bottle, rinse the loofah with an equal amount of deionized water (about 100 mL), and then put the loofah into an oven to dry at 80°C.

[0047] (3) Add 200mL deionized water into the three-necked bottle, desorb in a water bath at 80-85°C for 3 hours, then replace with 200ml deionized water, and continue the water bath for 3 hours.

[0048] (4) Take out the desorbed loo...

Embodiment 3

[0050] Embodiment 3: Atomic Absorption Spectroscopy (AAS) investigates its effect on Zn 2+ and Cu 2+ The adsorption-desorption reaction of:

[0051] (1) Weigh 2 portions of 0.4g loofah respectively, put them in two 100ml beakers, numbered 1#, 2#. Add 5mmol Zn-containing 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.

[0052] (2) Collect the filtrate in the 1# beaker into a 100mL volumetric flask, wash the loofah twice with deionized water, 10mL each time, and put the filtrate into the volumetric flask. Use atomic absorption spectrometry to measure its residual ion concentration, see Figure 3, and then convert it into the adsorption amount of loofah on metal ions.

[0053] (3) Discard the solution in the 2# beaker, and wash the loofah twice with deionized water, 10 mL each time. Transfer the 2# loofah into 250mL three-neck bottles respectively, add 80mL of HCl with a pH value ...

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Abstract

The invention relates to an application of vegetable sponge as adsorbent in metal ion adsorption. The vegetable sponge is derived from the fruit of loofah, and the natural adsorption material is obtained after the loofah is peeled off and the kernel is removed; the natural adsorption material can be directly used for absorbing the metal ions in solution, especially the water solution. The vegetable sponge has the advantages of wide source, capability of biodegradation, simple processing technology, ability to substitute synthetic macromolecular material and environmental friendliness.

Description

technical field [0001] The invention relates to the application of a natural material loofah in the adsorption of metal ions, in particular to the application of the adsorption of metal ions in a water system, and belongs to the technical field of natural polymer material application 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 tre...

Claims

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Application Information

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