CN101481185B - Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor - Google Patents
Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor Download PDFInfo
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- CN101481185B CN101481185B CN2009100427275A CN200910042727A CN101481185B CN 101481185 B CN101481185 B CN 101481185B CN 2009100427275 A CN2009100427275 A CN 2009100427275A CN 200910042727 A CN200910042727 A CN 200910042727A CN 101481185 B CN101481185 B CN 101481185B
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Abstract
The invention relates to a method of using a cation exchange membrane chemical reactor for separating and removing heavy metal ions in water, which uses the selective permeability of a cation exchange membrane for enabling heavy metal ions in a donor pool to be processed to pass through a cation exchange membrane to enter a receptor pool under the condition that no membrane pressure or no electric field is added, and then the heavy metal ions flow into a chemical reaction chamber for chemical deposition, so that the heavy metal ions to be processed in the water is separated and removed, and the supernatant liquid of a deposition pool backflows to the receptor pool for circulation use. The method is carried out under the condition that no membrane pressure or no electric filed is added, and low energy consumption is consumed. The added chemical agent powder is in contact with a donor pool solution, and the secondary pollution is effectively prevented. A compensation ion solution is used in circulation, the medical agent consumption is reduced, and the processing cost is low. In addition, the method also has the advantages of good effect of separating and removing the heavy metal ions in the water, simple and convenient operation, convenient kit production and the like.
Description
Technical field
The present invention relates to remove the method for heavy metal ion in the water, further be meant with cationic exchange membrane chemical reactor (Cation Ion Exchange Membrane Cnemoreactor, i.e. CIEMC) and separate the method for removing heavy metal ion in the water.
Background technology
In drinking water source (surface water and underground water) and trade effluent, there are contents of many kinds of heavy metal ion such as iron, manganese, antimony, copper, mercury, because heavy metal is to the hazardness of human body and environment, all kinds of water quality standard of countries in the world promulgation all have strict restriction to the content of heavy metal ion.
The method of removing heavy metal ion in the water generally has: chemical precipitation method, Coagulation Method, ion-exchange-resin process, absorption method, biological process etc.Chemical precipitation method precipitates removal after promptly heavy metal ion being transformed into salts such as the oxyhydroxide that is insoluble in water or sulfide, but the chemical agent that adds can make the new impurity of introducing in the water; Coagulation Method is to form flco and utilize flco absorption to remove these heavy metal ion by dosing coagulant, and this method need consume a large amount of coagulating agent, and cost is higher, and not ideal enough to some ionic removal effect; Ion-exchange-resin process employing ion exchange resin in resin, remove or reclaim heavy metal ion with this, but the ion exchange resin price is more expensive with ion-exchange soluble in water, and regeneration needs to consume a large amount of medicaments; Absorption method has been widely used in the removal of heavy metal ion, but absorption method only transfers to heavy metal ion the solid phase from liquid phase, and sorbent material need be regenerated; Biological process utilizes microorganism enrichment to some heavy metal in process of growth to reach the purpose that it is removed from water, but biological process need carry out biological introducing a fine variety, cultivation and nutritive substance supply, operation inconvenience, and when concentration of heavy metal ion is higher, can produce toxic side effect to biology, cause that biological respinse efficient reduces even inefficacy.
This shows that all there is certain limitation in the method for heavy metal ion in the existing removal water, explore the method for heavy metal ion in the removal water of efficient, less energy-consumption, received domestic and international many scholars' concern.
Summary of the invention
The objective of the invention is, at the existing limitation of removing heavy metal ion method existence in the water, propose a kind of cationic exchange membrane chemical reactor for separating and remove the method for heavy metal ion in the water, this method have separate remove that heavy metal ion is effective in the water, energy consumption is low, non-secondary pollution, processing cost are low, simple to operation, be convenient to advantage such as complete set making.
Technical scheme of the present invention is that the method that described cationic exchange membrane chemical reactor for separating is removed heavy metal ion in the water is:
Referring to Fig. 1, be provided with and give body pond 1, acceptor pond 2 and chemical reaction chamber 4, separate (being that described cationic exchange membrane 3 is the public pool wall of a side to body pond 1 and acceptor pond 2) with the 2 adjacent settings of acceptor pond and with cationic exchange membrane 3 for body pond 1, described chemical reaction chamber 4 is made up of reaction tank 5 and settling tank 6, and the solution overflow enters settling tank 6 in the reaction tank 5; Acceptor pond 2 water outlets were connected with reaction tank 5 water-ins through communicating pipe, and settling tank 6 supernatant liquors were connected with acceptor pond 2 water-ins through another communicating pipe;
Referring to Fig. 2, continuously flow into former water for body pond 1 and Continuous Flow goes out treating water, acceptor pond 2 continuously flows into counterion solution and continuous effluent; Former water contains the heavy metal ion that remains to be removed, and counterion solution contains concentration and (is generally K far above waiting the counterion of removing concentration of heavy metal ion
+Or Na
+), implement to stir continuously to giving the solution in body pond 1 and the acceptor pond 2; Because cationic exchange membrane 3 both sides exist chemical potential poor, according to Donnan dialysis (Donnan separation) principle, utilize the selection perviousness of cationic exchange membrane 3, enter in the acceptor pond 2 by cationic exchange membrane 3 under the condition that does not add mould or electric field to heavy metal ion to be removed in the body pond 1, realize waiting to remove the separation of heavy metal ion from give body pond solution;
Thereupon, acceptor pond solution is through entering the reaction tank 5 of chemical reaction chamber 4 described communicating pipe, by in this reaction tank, adding corresponding chemical medicament (as potassium hydroxide, salt of wormwood or potassium sulphide etc.), make heavy metal ion described to be removed form the salt of low solubility, solution overflow to settling tank 6 is realized solid-liquid separation in the reaction tank 5.Settling tank 6 bottoms are spoil disposal intermittently, so that further handle;
Solution (supernatant liquor) in the settling tank 6 after chemical precipitation is handled is back in the acceptor pond 2 through another communicating pipe and recycles, to reduce the consumption of counterion solution.
Among the present invention, be under the condition that does not add mould or electric field, to carry out because heavy metal ion to be removed enters the acceptor pond by cationic exchange membrane, so energy consumption is low; The chemical agent that adds in the reaction tank can not contact with giving body pond solution, prevents secondary pollution effectively; Solution after chemical precipitation is handled is back in the acceptor pond and recycles, and reduces the consumption of counterion solution, and processing cost is reduced.
As known from the above, the present invention is that the cationic exchange membrane chemical reactor for separating removes the method for heavy metal ion in the water, compared with prior art, has that energy consumption is low, non-secondary pollution, processing cost are low, simple to operation, be convenient to advantage such as complete set making.
Description of drawings
Fig. 1 is the cationic exchange membrane chemical reactor basic comprising synoptic diagram of an embodiment of the present invention;
Fig. 2 is the schematic diagram to cationic exchange in body pond and the acceptor pond solution.
In the drawings:
1-gives the body pond, 2-acceptor pond, and the 3-cationic exchange membrane,
4-chemical reaction chamber, 5-reaction tank, 6-settling tank.
Embodiment
Referring to Fig. 1 to Fig. 2, method of the present invention comprises:
Referring to Fig. 1, be provided with and give body pond 1, acceptor pond 2 and chemical reaction chamber 4, separate (being that described cationic exchange membrane 3 is the public pool wall of a side to body pond 1 and acceptor pond 2) with the 2 adjacent settings of acceptor pond and with cationic exchange membrane 3 for body pond 1, described chemical reaction chamber 4 is made up of reaction tank 5 and settling tank 6, and the solution overflow enters settling tank 6 in the reaction tank 5; Acceptor pond 2 water outlets were connected with reaction tank 5 water-ins through communicating pipe, and settling tank 6 supernatant liquors were connected with acceptor pond 2 water-ins through another communicating pipe;
Referring to Fig. 2, removing with the separation of cupric ion is example, enters for body pond 1 one ends continuously and contains the former water of waiting to remove cupric ion, and the other end is discharged treating water continuously; Acceptor pond 2 enters concentration continuously far above the counterion solution of waiting to remove copper ion concentration (KCl solution or NaCl solution); Implement to stir continuously to giving the solution in body pond and the acceptor pond.Under the driving of chemical potential difference, enter acceptor pond 2 by cationic exchange membrane 3 for the cupric ion in 1 solution of body pond, flow into the reaction tank 5 (chemical reaction chamber 4 is made up of reaction tank 5 and settling tank 6) in the chemical reaction chamber 4 then; Add potassium hydroxide in reaction tank 5, make cupric ion become the copper hydroxide precipitation, settling tank 6 realization solid-liquid separation are gone in the solution overflow in the reaction tank 5; Supernatant liquor in the settling tank 6 (counterion that still contains higher concentration, but copper ions not) substantially is back in the acceptor pond 2 and recycles.Experimental result shows, when copper ion concentration is the 10mg/L left and right sides in the former water, by adjusting flooding velocity and counterion concentration, after 6 hours, gives body pond 1 stable effluent quality in the operation of ion-exchange membrane chemical reactor, and the cupric ion clearance reaches 75%-80%.
Claims (3)
1. a cationic exchange membrane chemical reactor for separating is removed the method for heavy metal ion in the water, it is characterized in that this method comprises:
(1) be provided with to body pond, acceptor pond and chemical reaction chamber, separate to the adjacent setting with the acceptor pond in body pond and with cationic exchange membrane, described chemical reaction chamber is made up of reaction tank and settling tank, and the solution overflow enters settling tank in the reaction tank; Acceptor pond water outlet was connected with the reaction tank water-in through communicating pipe, and the settling tank supernatant liquor was connected with acceptor pond water-in through another communicating pipe;
(2) continuously flow into former water for the body pond and Continuous Flow goes out treating water, the acceptor pond continuously flows into counterion solution and continuous effluent; Former water contains the heavy metal ion that remains to be removed, and counterion solution contains concentration far above the counterion of waiting to remove concentration of heavy metal ion, implements to stir continuously to giving the solution in body pond and the acceptor pond; Utilize the selection perviousness of cationic exchange membrane, make to heavy metal ion to be removed in the solution of body pond to enter in the acceptor pond, realize the separation of heavy metal ion by cationic exchange membrane;
(3) water outlet of acceptor pond by add the corresponding chemical medicament in this reaction tank, makes described heavy metal ion form the salt of low solubility through entering the reaction tank of chemical reaction chamber described communicating pipe, and solution overflow to settling tank is realized solid-liquid separation in the reaction tank; The settling tank bottom is spoil disposal intermittently, so that further handle.
2. cationic exchange membrane chemical reactor for separating according to claim 1 is removed the method for heavy metal ion in the water, it is characterized in that, the solution in the described settling tank after chemical precipitation is handled is back in the acceptor pond through another communicating pipe and recycles.
3. cationic exchange membrane chemical reactor for separating according to claim 1 is removed the method for heavy metal ion in the water, it is characterized in that described counterion solution is for containing KCl or NaCl solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100427275A CN101481185B (en) | 2009-02-25 | 2009-02-25 | Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100427275A CN101481185B (en) | 2009-02-25 | 2009-02-25 | Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor |
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| Publication Number | Publication Date |
|---|---|
| CN101481185A CN101481185A (en) | 2009-07-15 |
| CN101481185B true CN101481185B (en) | 2011-05-11 |
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| CN2009100427275A Expired - Fee Related CN101481185B (en) | 2009-02-25 | 2009-02-25 | Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557195A (en) * | 2012-01-05 | 2012-07-11 | 河南工业大学 | Method for removing heavy metals in water by collaboration of dialysis through ion exchange membrane and chemical precipitation |
| CN110596022B (en) * | 2019-08-28 | 2022-02-22 | 广东工业大学 | Atomization device and atomization method |
| CZ2020291A3 (en) * | 2020-05-22 | 2021-11-18 | Vysoká škola báňská – Technická univerzita Ostrava | Water ionization reactor |
| CN113772773B (en) * | 2021-10-14 | 2022-06-28 | 中国矿业大学 | Method and device for purifying heavy metal sewage gradually in radial direction by coupling of heat, electricity and membrane |
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Assignee: Hunan Haomei Safety Environmental Protection Science and Technology Co., Ltd. Assignor: Hunan University Contract record no.: 2011430000287 Denomination of invention: Method for separating and removing heavy metal ion in water by cation exchange membrane chemistry reactor Granted publication date: 20110511 License type: Exclusive License Open date: 20090715 Record date: 20111214 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20160225 |