CN1446755A - Method for adsorbing heavy metal by using weak anion resin - Google Patents
Method for adsorbing heavy metal by using weak anion resin Download PDFInfo
- Publication number
- CN1446755A CN1446755A CN03109475A CN03109475A CN1446755A CN 1446755 A CN1446755 A CN 1446755A CN 03109475 A CN03109475 A CN 03109475A CN 03109475 A CN03109475 A CN 03109475A CN 1446755 A CN1446755 A CN 1446755A
- Authority
- CN
- China
- Prior art keywords
- resin
- heavy metal
- weak base
- exchange resin
- base anion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011347 resin Substances 0.000 title claims abstract description 32
- 229920005989 resin Polymers 0.000 title claims abstract description 32
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 18
- 150000001450 anions Chemical class 0.000 title claims description 6
- 239000003957 anion exchange resin Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000002500 ions Chemical class 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims description 18
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 7
- 125000000320 amidine group Chemical group 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 1
- 125000003277 amino group Chemical group 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000002585 base Substances 0.000 description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 11
- 230000008929 regeneration Effects 0.000 description 8
- 238000011069 regeneration method Methods 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000008239 natural water Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 229910001413 alkali metal ion Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910000678 Elektron (alloy) Inorganic materials 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Treatment Of Water By Ion Exchange (AREA)
Abstract
A process for using weakly alkaline anionic exchange resin to adsorb heavy metal from water is disclosed, which is based on the chemical coordination theory that the ammonia atom on amino group of resin acts on heavy metal ions to form complex. Its advantages are high effect, no affection to useful components in water, and less generation of sewage.
Description
Technical field
The invention belongs to heavy metal separating ranges in the water technology, particularly according to the theoretical a kind of weak base anion-exchange resin absorption heavy metal method of removing the heavy metal contamination of trace in the natural water body of coordination chemistry.
Background technology
The little pollution of heavy metal in tap water concentration in water is low, is generally the trace level, and background material such as alkalimetal ion, alkaline-earth metal ions, various strong acid and weak acid anion etc. in the water, its concentration is than the high several magnitude of heavy metal.It is foothold of the present invention that the heavy metal Micropollutants are had high optionally water technology, promptly when removing the underwater trace heavy metal, should keep in the water component to the human body beneficial can not removed simultaneously.
The method of removing the heavy metal in the water has many kinds, the for example precipitator method, resin method, natural zeolite absorption, ion exchange method, membrane technique, charcoal absorption etc., these can not satisfy the needs of selective removal trace heavy metal under alkalimetal ion, alkaline-earth metal ions, the relative conditions of higher with the weak acid anion isoconcentration of various strong acid, yet there are no report with homemade weak base anion-exchange resin absorption heavy metal method at present.
Summary of the invention
The purpose of this invention is to provide efficient, remove a kind of weak base anion-exchange resin absorption heavy metal method of the heavy metal contamination of trace in the natural water body selectively, it is characterized in that: the heavy metal ion that described weak base anion-exchange resin is removed underwater trace is to be based upon on the theoretical basis of coordination chemistry, heavy metal ion is not to pass through permutoid reaction, but with the form of heavy metallic salt by resin absorption, in coordination reaction, the strong acid anion of resin absorption equivalent, make the positive charge of nitrogen-atoms obtain neutralization, therefore resin shows as the absorption to heavy metallic salt, is shown below:
Wherein R represents resin matrix, and N represents the nitrogen-atoms on the resin amidine functional group, last line expression resin phase, and Me represents heavy metal.
Its actual method of replacing is that the Filter column aspect ratio is controlled at more than 2: 1 with the homemade weak base anion-exchange resin Filter column of packing into, and water by homemade weak base anion-exchange resin, is promptly realized the alternative micro heavy of removing under normal temperature, normal pressure.
It is described that to select the pH value of weak base anion-exchange resin for use be 5～10 scopes,
The invention has the beneficial effects as follows that 1. these technologies have the natural water body purifying treatment that will contain the micro heavy pollution, selective removal micro heavy pollutes, removal effect is good, and keep in the water body component simultaneously to the human body beneficial, as basic metal, alkaline-earth metal ions etc., thereby produce the fine tap water.2. experimental result shows, cycle of operation of resin can reach 2-3 month, and the cycle of operation is long, and water outlet can reach the requirement of external drink water.Reclaiming process is simple, and the regeneration waste liquid amount is little, and it is sulfuric acid and each 3-4 of the sodium hydroxide times resin filter column volume of 1N that regenerative process only needs concentration, and regeneration efficiency can reach more than 95%.
Embodiment
The present invention is a kind of weak base anion-exchange resin absorption heavy metal method of removing the heavy metal contamination of trace in the natural water body efficiently, selectively, the heavy metal ion that described weak base anion-exchange resin is removed underwater trace is based upon on the theoretical basis of coordination chemistry, heavy metal ion is not to pass through permutoid reaction, but with the form of heavy metallic salt by resin absorption, be shown below:
Wherein R represents resin matrix, and N represents the nitrogen-atoms on the resin amidine functional group, last line expression resin phase, and Me represents heavy metal.
Weak base anion-exchange resin is a kind of coordination multipolymer, contains nitrogen-atoms on the amidine functional group of its covalent linkage side chain, and lone-pair electron can be provided, and has the characteristic (Lewis alkali) of electron donor(ED); The valence shell of underwater trace heavy metal ion has (n-1) d, and totally nine close electronic orbits of energy such as ns, np etc. can carry out hydridization, have the characteristic (Lewis acid) of electron acceptor(EA).The functional group of weak base anion-exchange resin provides lone-pair electron and heavy metal ion acting in conjunction to form complex compound as ligand thus.Nitrogen-atoms is positively charged because lone-pair electron are provided, and according to the electric neutrality principle, in coordination reaction, the strong acid anion of resin absorption equivalent makes the positive charge of nitrogen-atoms obtain neutralization.But constant alkalimetal ion such as K
+, Na
+Deng, alkaline-earth metal ions such as Ca
2+, Mg
2+Deng, its electronics skin is the rare gas element electronic configuration, does not have unoccupied orbital, is difficult for accepting electronics, thereby can not form complex compound with the nitrogen-atoms on the resin amidine functional group, and is adsorbed by weak base anion-exchange resin hardly.Therefore resin shows as selectively the absorption to heavy metallic salt.But its loading capacity reduces with the reduction of resin pH value, i.e. preferential the and H of N atom
+The position.Thus, can adopt the counter-current regeneration mode to realize regeneration of resin, and make resin return to original state by adding sulfuric acid and sodium hydroxide.Its reaction process is:
Its actual method of replacing is with the homemade weak base anion-exchange resin Filter column of packing into, the Filter column aspect ratio is controlled at more than 2: 1, 's 5～10 homemade weak base anion-exchange resin with water by the pH value, cross below the speed that water speed per hour remains on 20 times of Filter column resin admission spaces, under normal temperature, normal pressure, can reach absorption purpose heavy metallic salt.Counter-current regeneration is adopted in resin regeneration, crosses water speed and per hour remains on below the speed of 1 times of Filter column resin admission space.With the regeneration of sulfuric acid of 0.5mol/L, with the tap water flushing, need 6 times of Filter column resins of water yield admission space after 3-4 hour earlier.With the NaOH regeneration of 1mol/L, carry out the tap water flushing second time after 3-4 hour again, need water yield 10-12 times of Filter column resin admission space from the beginning.Acid solution can reuse 5 times at least, and alkali lye can reuse 3 times at least.
Claims (2)
1. a weak base anion-exchange resin adsorbs the heavy metal method, it is characterized in that: the heavy metal ion that described weak base anion-exchange resin is removed underwater trace is based upon on the theoretical basis of coordination chemistry, heavy metal ion is not to pass through permutoid reaction, but with the form of heavy metallic salt by resin absorption, in coordination reaction, the strong acid anion of resin absorption equivalent makes the positive charge of nitrogen-atoms obtain neutralization, and the absorption that therefore resin shows as heavy metallic salt is shown below:
Wherein R represents resin matrix, and N represents the nitrogen-atoms on the resin amidine functional group, last line expression resin phase, and Me represents heavy metal.
Its actual method of replacing is that the Filter column aspect ratio is controlled at more than 2: 1 with the homemade weak base anion-exchange resin Filter column of packing into, and water by homemade weak base anion-exchange resin, is promptly realized the alternative micro heavy of removing under normal temperature, normal pressure.
2. according to the described weak base anion-exchange resin of claim 1 absorption heavy metal method, it is characterized in that: described to select the pH value of weak base anion-exchange resin for use be 5～10 scopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03109475A CN1446755A (en) | 2003-04-10 | 2003-04-10 | Method for adsorbing heavy metal by using weak anion resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN03109475A CN1446755A (en) | 2003-04-10 | 2003-04-10 | Method for adsorbing heavy metal by using weak anion resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1446755A true CN1446755A (en) | 2003-10-08 |
Family
ID=28050256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN03109475A Pending CN1446755A (en) | 2003-04-10 | 2003-04-10 | Method for adsorbing heavy metal by using weak anion resin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1446755A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314573B (en) * | 2008-07-08 | 2010-12-08 | 杭州格林达化学有限公司 | Method for treating tetramethyl ammonium carbonate with ion exchange resin |
| CN101754810B (en) * | 2007-07-19 | 2012-11-07 | 拜尔材料科学股份公司 | Regeneration of anion exchangers loaded with hexachlorostannate |
| CN102989529A (en) * | 2012-11-28 | 2013-03-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for on-line recovery of ion exchange resin |
| CN101605728B (en) * | 2007-02-16 | 2013-07-24 | 3M创新有限公司 | System and process for the removal of fluorochemicals from water |
| CN109052731A (en) * | 2018-09-14 | 2018-12-21 | 杭州开源环保工程有限公司 | A method of efficiently removing antimony from dyeing waste water |
| CN111847715A (en) * | 2020-07-21 | 2020-10-30 | 东华理工大学 | High-efficient unpowered groundwater pollution prosthetic devices of normal position |
-
2003
- 2003-04-10 CN CN03109475A patent/CN1446755A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101605728B (en) * | 2007-02-16 | 2013-07-24 | 3M创新有限公司 | System and process for the removal of fluorochemicals from water |
| CN101754810B (en) * | 2007-07-19 | 2012-11-07 | 拜尔材料科学股份公司 | Regeneration of anion exchangers loaded with hexachlorostannate |
| CN101314573B (en) * | 2008-07-08 | 2010-12-08 | 杭州格林达化学有限公司 | Method for treating tetramethyl ammonium carbonate with ion exchange resin |
| CN102989529A (en) * | 2012-11-28 | 2013-03-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for on-line recovery of ion exchange resin |
| CN102989529B (en) * | 2012-11-28 | 2014-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for on-line recovery of ion exchange resin |
| CN109052731A (en) * | 2018-09-14 | 2018-12-21 | 杭州开源环保工程有限公司 | A method of efficiently removing antimony from dyeing waste water |
| CN111847715A (en) * | 2020-07-21 | 2020-10-30 | 东华理工大学 | High-efficient unpowered groundwater pollution prosthetic devices of normal position |
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