CN102309956A - Reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water - Google Patents
Reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water Download PDFInfo
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- CN102309956A CN102309956A CN201110083875A CN201110083875A CN102309956A CN 102309956 A CN102309956 A CN 102309956A CN 201110083875 A CN201110083875 A CN 201110083875A CN 201110083875 A CN201110083875 A CN 201110083875A CN 102309956 A CN102309956 A CN 102309956A
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- heavy metal
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- glutaraldehyde
- waste water
- water
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Abstract
The invention relates to a reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water. The preparation method comprises the following steps of: mixing and stirring 5g of chitosan powder and 75ml-100ml of glutaraldehyde solution with the concentration of 25 percent in a matrass with the volume of 125ml; and washing the product with water for removing glutaraldehyde and drying to obtain glutaraldehyde crosslinked chitosan. The invention has the advantages of low cost, simple preparation method, higher heavy metal removing effect, and the like, expands the application field by modifying the chitosan so as to effectively treat heavy metal Cr (VI) and Pb<2+> in water.
Description
Technical field
The present invention relates to the heavy metal treatment technology in the industrial wastewater, relate in particular to a kind of be used for removing waste water heavy metal Cr (VI) and Pb
2+Reagent.
Background technology
Along with the raising day by day with people's living standard that develops rapidly of industrial or agricultural, the protection environment prevents water pollution; Become people's common recognition; How to pass through scientific methods,, impetus has been played in the development of water purification technology with less cost protection water resource environment; At present, the new material that is used for water treatment of various stable performances continues to bring out.Owing in municipal sewage, sneak into industrial wastewater; In mud, just assembled a certain amount of heavy metal like this; These heavy metals not only directly have influence on the recycling (comprising the farmland reuse of mud) of mud; Can cause " secondary pollution " to environment if Treatment of Sludge is improper, at present more to the research of heavy metal in the mud, but majority carries out from stabilizing heavy metal degree toxicity and reduction content of beary metal.
Chemical method is a kind of heavy metal removal technology in the simple relatively mud that is easy to grasp, operates; Mainly be through in mud, adding chemical agent; Improve the oxidation-reduction potential (Eh) of mud or reduce the sludge pH value, thereby heavy metal in the mud is transformed to soluble ionic state or complex ion attitude by the compound of soluble attitude.Chemical method is removed the respond well of heavy metal, but acidification sludge and in leachate in acid all to consume a large amount of chemical reagent, therefore adopt the spent expense cost of chemical method higher.
Summary of the invention
To above defective; The present invention provide a kind of utilize shitosan to carry out modification and enlarge its application, with low cost, preparation method simple, remove the reagent that the heavy metal effect is used for removing waste water heavy metal Cr (VI) and Pb2+ preferably, to solve many deficiencies of prior art.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind ofly be used for removing waste water heavy metal Cr (VI) and Pb
2+Reagent, its preparation method comprises that to select 5g shitosan powder and concentration for use be 75ml-100ml glutaraldehyde solution of 25% and in capacity is the flask of 125ml, mixes stirring that it is dry again that product is removed glutaraldehyde through water washing, obtains the glutaraldehyde cross-linking shitosan.
Of the present inventionly be used for removing waste water heavy metal Cr (VI) and Pb
2+The beneficial effect of reagent be: enlarge its application through utilizing shitosan to carry out modification, thereby effectively handle heavy metal Cr (VI) and Pb in the water
2+, have advantages such as with low cost, that the preparation method simple, removal heavy metal effect is better.
The specific embodiment
Embodiment 1
The embodiment of the invention is described to be used for removing waste water heavy metal Cr (VI) and Pb
2+Reagent; Its preparation method mainly comprises: to select 5g shitosan powder and concentration for use be 25% 75ml glutaraldehyde solution mixes in capacity is the flask of 125ml; Stir 12 hours (250r/min); It is dry again that product is removed glutaraldehyde through water washing, obtains the glutaraldehyde cross-linking shitosan, subsequent use after infrared spectrum detects.
Its characterizing method is: adopt diphenyl carbazide spectrophotometry to measure the content of Cr (VI) in the water sample of absorption back; In the acid medium, measure absorbance at wavelength 540nm place, and obtain adsorbance through calibration curve; Atomic absorption method is adopted in the assay method of cadmium, lead and the contrast of Cr (VI).
Embodiment 2
The embodiment of the invention is described to be used for removing waste water heavy metal Cr (VI) and Pb
2+Reagent; Its preparation method mainly comprises: to select 5g shitosan powder and concentration for use be 25% 100ml glutaraldehyde solution mixes in capacity is the flask of 125ml; Stir 15 hours (250r/min); It is dry again that product is removed glutaraldehyde through water washing, obtains the glutaraldehyde cross-linking shitosan, subsequent use after infrared spectrum detects.
Claims (1)
1. one kind is used for removing waste water heavy metal Cr (VI) and Pb
2+Reagent; It is characterized in that; Its preparation method comprises that to select 5g shitosan powder and concentration for use be 75ml-100ml glutaraldehyde solution of 25% and in capacity is the flask of 125ml, mixes stirring that it is dry again that product is removed glutaraldehyde through water washing, obtains the glutaraldehyde cross-linking shitosan.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201110083875A CN102309956A (en) | 2011-04-04 | 2011-04-04 | Reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201110083875A CN102309956A (en) | 2011-04-04 | 2011-04-04 | Reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water |
Publications (1)
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CN102309956A true CN102309956A (en) | 2012-01-11 |
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CN201110083875A Pending CN102309956A (en) | 2011-04-04 | 2011-04-04 | Reagent for removing heavy metal Cr (VI) and Pb<2+> in waste water |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106967420A (en) * | 2017-04-24 | 2017-07-21 | 中国科学院合肥物质科学研究院 | A kind of cross-linked chitosan fluorescence probe material and preparation method and application |
CN107175083A (en) * | 2017-06-07 | 2017-09-19 | 成都信息工程大学 | A kind of FeCl3Chitosan polymer and preparation method and application |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0321390A (en) * | 1989-06-16 | 1991-01-30 | Asahi Chem Ind Co Ltd | Removal of heavy metal ion in water |
CN101898824A (en) * | 2010-04-12 | 2010-12-01 | 南京师范大学 | Sulfide heavy metal chelating trapping agent and preparation method thereof |
-
2011
- 2011-04-04 CN CN201110083875A patent/CN102309956A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0321390A (en) * | 1989-06-16 | 1991-01-30 | Asahi Chem Ind Co Ltd | Removal of heavy metal ion in water |
CN101898824A (en) * | 2010-04-12 | 2010-12-01 | 南京师范大学 | Sulfide heavy metal chelating trapping agent and preparation method thereof |
Non-Patent Citations (1)
Title |
---|
王劲松等: "印迹与交联壳聚糖吸附水中微量Cr(Ⅵ)的对比试验研究", 《南华大学学报(自然科学版)》, vol. 24, no. 1, 31 March 2010 (2010-03-31) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106967420A (en) * | 2017-04-24 | 2017-07-21 | 中国科学院合肥物质科学研究院 | A kind of cross-linked chitosan fluorescence probe material and preparation method and application |
CN106967420B (en) * | 2017-04-24 | 2020-03-31 | 中国科学院合肥物质科学研究院 | Cross-linked chitosan fluorescent probe material and preparation method and application thereof |
CN107175083A (en) * | 2017-06-07 | 2017-09-19 | 成都信息工程大学 | A kind of FeCl3Chitosan polymer and preparation method and application |
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Application publication date: 20120111 |