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Heavy metal ion adsorbent as well as preparation and application thereof

A heavy metal and adsorbent technology, which can be used in adsorption water/sewage treatment, other chemical processes, chemical instruments and methods. , the effect of high specific surface area

Inactive Publication Date: 2013-04-24
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These adsorbents have disadvantages such as limited heavy metal adsorption performance or poor mechanical properties.

Method used

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  • Heavy metal ion adsorbent as well as preparation and application thereof
  • Heavy metal ion adsorbent as well as preparation and application thereof
  • Heavy metal ion adsorbent as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of graphite oxide

[0020] Take 100mL98% concentrated sulfuric acid, 2g NaNO 3 Mix, slowly add 4g of graphite powder and 12g of KMnO in an ice-water bath 4 , Added within one hour, after mixing evenly, remove the ice-water bath for half an hour, then use boiling water bath, slowly add 180mL of secondary water and stir for 20 minutes at constant temperature. Finally 550 mL of secondary water was added to the mixture. with 30% H 2 o 2 Consume unreacted KMnO 4 . The mixture was washed thoroughly with secondary water until there was no sulfate group in the supernatant. Put the graphite oxide into an ultra-low temperature refrigerator to freeze, freeze the graphite oxide into a solid, and then put it into a vacuum freeze dryer to dry until the water is completely removed.

[0021] (2) Preparation of graphite oxide-oligomeric 3-aminopropyltriethoxysilane composites

[0022] Take 1mL of 3-aminopropyltriethoxysilane and hydrolyze it in 200mL of deionized...

Embodiment 2

[0026] Change the preparation method of oligomeric 3-aminopropyltriethoxysilane in Example 1 to 1mL of 3-aminopropyltriethoxysilane in 200mL of deionized water at 45°C for 5 hours to obtain (molecular weight 300~404 range) of the supernatant of oligomeric 3-aminopropyltriethoxysilane. Other steps are identical with embodiment 1. The adsorption amount was measured by simulating the Langmuir adsorption isotherm. The adsorption capacity of lead obtained by GN is 300mg.g -1 .

[0027] It can be seen that the GN prepared when the molecular weight of the oligomeric 3-aminopropyltriethoxysilane is small has a stronger adsorption capacity for heavy metals such as lead. Because GN prepared from low molecular weight oligoaminosiloxane has more amino groups than GN prepared from large molecular weight oligoaminosiloxane at the same mass.

[0028] Table 1 GN and GN 0 Adsorption Constants of Langmuir Isotherm Model for Adsorption of Pb(Ⅱ)

[0029]

[0030] Table 2 Heavy metal adso...

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Abstract

A heavy metal ion adsorbent as well as preparation and application thereof are provided. The invention relates to a composite material graphene-oligomerization tri-aminopropyl triethoxysilane. In addition, the graphene-oligomerization tri-aminopropyl triethoxysilane is used as the heavy metal ion adsorbent. The heavy metal ion adsorbent provided by the invention has excellent property in the aspect of heavy metal wastewater treatment.

Description

technical field [0001] The invention relates to the preparation and application of a heavy metal adsorbent. Background technique [0002] The development of industry brings wealth and various hidden dangers. Among them, heavy metal pollution seriously affects human life. Therefore, the purification and treatment of heavy metal wastewater has become one of the urgent problems to be solved in environmental protection. Adsorption is an important means to deal with heavy metal pollution. The existing heavy metal adsorbents include inorganic adsorption materials such as activated carbon, vermiculite, bentonite, etc., organic adsorption materials such as cellulose and its modified products, chitosan, etc. These adsorbents have disadvantages such as limited heavy metal adsorption performance or poor mechanical properties. Contents of the invention [0003] The object of the present invention is aimed at a kind of adsorbent with good adsorption effect on heavy metals and its pr...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F1/62
Inventor 罗胜联徐翔丽刘承斌唐艳红李晓洁张航周贝
Owner HUNAN UNIV
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