CN103496756B - Plasma body removes haloform devices and methods therefor in tap water - Google Patents
Plasma body removes haloform devices and methods therefor in tap water Download PDFInfo
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- CN103496756B CN103496756B CN201310477152.6A CN201310477152A CN103496756B CN 103496756 B CN103496756 B CN 103496756B CN 201310477152 A CN201310477152 A CN 201310477152A CN 103496756 B CN103496756 B CN 103496756B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000008399 tap water Substances 0.000 title claims abstract description 27
- 235000020679 tap water Nutrition 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 229910052786 argon Inorganic materials 0.000 claims abstract description 15
- 239000003513 alkali Substances 0.000 claims abstract description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000011089 carbon dioxide Nutrition 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 239000012433 hydrogen halide Substances 0.000 claims abstract description 5
- 229910000039 hydrogen halide Inorganic materials 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 3
- 239000013589 supplement Substances 0.000 claims abstract description 3
- 230000000153 supplemental effect Effects 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 2
- 230000007115 recruitment Effects 0.000 claims description 2
- GATVIKZLVQHOMN-UHFFFAOYSA-N Chlorodibromomethane Chemical compound ClC(Br)Br GATVIKZLVQHOMN-UHFFFAOYSA-N 0.000 description 10
- 235000020188 drinking water Nutrition 0.000 description 8
- 239000003651 drinking water Substances 0.000 description 8
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 7
- 229960001701 chloroform Drugs 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 5
- FMWLUWPQPKEARP-UHFFFAOYSA-N bromodichloromethane Chemical compound ClC(Cl)Br FMWLUWPQPKEARP-UHFFFAOYSA-N 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- -1 hydroxyl radical free radical Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001243 acetic acids Chemical class 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
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- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
Abstract
Plasma body removes haloform devices and methods therefor in tap water, relates to a kind of water treatment.Described plasma body is removed haloform device in tap water and is provided with reactor, gas discharge tube, gas recycle pump, alkaline tank, electrode and high frequency electric source.After reactor water flowing, pass into oxygen and argon gas; Open gas recycle pump, adjustments of gas flow velocity; Open high frequency electric source, in gas discharge tube, utilize gas phase discharges to process air inlet, give vent to anger and be automatically passed into alkaline tank during electric discharge, hydrogen halide and carbonic acid gas are absorbed, residual gas gets back to reaction vessel, continues haloform in stripping water and enters discharge tube degraded; When oxygen content in discharge tube by volume percentage calculation lower than 0.05% time, by oxygen bottle supplemental oxygen to 0.1% ~ 10%, when concentration of lye in alkaline tank is lower than 0.05mol/L, supplement alkali lye to 0.1 ~ 5mol/L.
Description
Technical field
The present invention relates to a kind of water treatment, especially relate to a kind of plasma body and remove haloform devices and methods therefor in tap water.
Background technology
In recent years, Drinking Water in China pollution of waterhead increasingly sharpens, the traditional technology that at present, water purification plant mainly adopts " coagulation-filtration-chlorine disinfectant ", this technique effectively can remove suspended substance in water, colourity and pathogenic bacteria, but limited to dissolved organic matter removal effect wherein.In cholorination process, these organism can react with sterilizing agent and produce multiple poisonous and harmful by product, as haloform (THMs), halogenated acetic acids (HAAs) etc.Wherein, THMs is the class material that in disinfection by-product of drinking water, content is the highest, distribution is the widest, comprises trichloromethane, Dichloro-monobromo methane, chlorodibromomethane, methenyl bromide etc.THMs is difficult to natural decomposition in water, is confirmed to have carinogenicity by epidemiology, drinks or use the water that THMs exceeds standard, will bring serious harm to human health.
THMs class disinfection byproduct (DBP) has become the Con trolling index in the water quality standard for drinking water of majority state and tissue.The earliest, trichloromethane (TCM) is only listed in drinking water standard (GB5749-85) by China.Along with the further raising to water quality requirement, in up-to-date " drinking water sanitary standard " (GB5749-2006) of China, water-quality guideline increases to 106 by 35 of primary standard, adds 71, comprises and carry out more strict regulation to the limitation of halogenated alkane.At present, in tap water, the minimizing technology of THMs mainly contains charcoal absorption, air stripping and ozone oxidation.Activated carbon adsorption removes THMs instead of decomposition by the principle of balancing control, gac is easy to reach capacity, and needs to regenerate frequently, and process is complicated, high ([1] Babi of processing costs, K.G., Koumenides, K.M., Nikolaou, A.D., Makri, C.A., Tzoumerkas, F.K., & Lekkas, T.D.PilotstudyoftheremovalofTHMs, HAAsandDOCfromdrinkingwaterbyGACadsorption.Desalination, 2007,210 (1), 215-224).THMs belongs to halogenated hydrocarbon compound, and the feature of this compounds is low with hydroxyl radical reaction speed, and therefore high-level oxidation technology is as long in the ozone Oxidation Treatment time, and removal efficiency is low.Air stripping is a kind of simple effective method, but THMs is just transferred to gas phase from liquid phase by the method, needs very large gas-water ratio ([2] Wu Fangtong; Su Qiuxia; Wu Shujuan. air stripping method removes the haloform in tap water, water supply and drainage, 2009,35(12) 26-30), and bring atmospheric pollution ([3] WANG, Gen-Shuh; DENG, Ya-Chen; LIN, Tsair-Fuh.Cancerriskassessmentfromtrihalomethanesindrink ingwater.ScienceoftheTotalEnvironment, 2007,387.1:86-95).Therefore development of new THMs treatment technology has important practical significance and application prospect.
Low temperature discharge plasma body is that the technique of rising in recent years is simple, treatment effect good, the new type water treatment technology of non-secondary pollution.In discharge process, water molecules produces a large amount of multiple superpower active particle under the effect of energy of plasma, and these particles can react by the THMs fast and in water.A large amount of hydrogen atoms and hydrated electron can also be generated because discharge plasma not only can generate hydroxyl radical free radical.High three orders of magnitude of rate constant that the rate constant that hydrated electron and THMs react is reacted than hydroxyl radical free radical and THMs, not only speed is high for this technical finesse THMs, and thoroughly.
Summary of the invention
A kind of plasma body is the object of the present invention is to provide to remove haloform device in tap water.
Another object of the present invention is to provide a kind of plasma body to remove the method for haloform in tap water.
Described plasma body is removed haloform device in tap water and is provided with reactor, gas discharge tube, gas recycle pump, alkaline tank, electrode and high frequency electric source;
Described reactor is provided with oxygen inlet mouth, argon inlet mouth, recycle gas inlet mouth and recycle gas air outlet; Gas in reactor after aeration stripping enters gas discharge tube, and gas discharge tube is connected with high frequency electric source, and the gas after gas discharge tube degraded passes into alkaline tank; Alkaline tank air outlet connects gas recycle pump, and the gas after alkali liquor absorption is passed into reaction vessel again.
Described gas discharge tube can adopt Glass tubing or silica tube etc., and interior electrode can adopt copper rod, copper pipe, stainless steel bar or stainless steel tube etc., and outer electrode can adopt aluminium flake or iron plate etc.
The discharge frequency of described high frequency electric source can be 50 ~ 10000Hz.
Described alkali lye selected from sodium hydroxide or potassium hydroxide etc., the concentration of alkali lye can be 0.1 ~ 5mol/L.
Described plasma body removes the method for haloform in tap water, adopts described plasma body to remove haloform device in tap water, comprises the following steps:
1), after reactor water flowing, oxygen and argon gas is passed into;
2) open gas recycle pump, adjustments of gas flow velocity is at 5 ~ 100ml/s;
3) high frequency electric source is opened, electric discharge starts, in gas discharge tube, utilize gas phase discharges to process air inlet, give vent to anger during electric discharge and be automatically passed into alkaline tank, wherein hydrogen halide and carbonic acid gas are absorbed, and residual gas is pumped back to reaction vessel by gas circulation, continue haloform in stripping water and enter discharge tube degraded, when being greater than 10min upon discharging, haloform clearance more than 90% in water;
4) when oxygen content in discharge tube by volume percentage calculation lower than 0.05% time, by oxygen bottle supplemental oxygen to 0.1% ~ 10%, when concentration of lye in alkaline tank is lower than 0.05mol/L, supplement alkali lye to 0.1 ~ 5mol/L.
In step 1), the volume ratio of described oxygen and argon gas can be (0.1 ~ 10): 100, and the volume ratio of gas and water can be (0.1 ~ 5): 1.
In step 3), described when utilizing gas phase discharges to process air inlet in gas discharge tube, containing oxygen, argon gas, water vapour, hydrogen halide, carbonic acid gas and undecomposed THMs in giving vent to anger.
In step 4), the magnitude of recruitment of described oxygen and alkali lye also can calculate by following chemical equation:
2HCX
3+2H
2O+O
2+10OH
-→6X
-+2CO
3 2-
(X=Cl, Br, or I)
The present invention utilizes haloform in gas circulation stripping water, then geseous discharge directly produces plasma body, remove haloform in water quickly and efficiently, energy consumption is low, non-secondary pollution, do not change the pH value of water, realize degraded product to be separated with water, overcome independent gas phase or discharge in water and easily produce degradation shortcoming under secondary pollution and water outlet pH.Process condition range of the present invention is normal temperature and pressure conditions, is therefore applicable to community and supplies water and domestic drinking water, bath water process.
THMs in tap water introduces in plasma body by the present invention dexterously, occur thoroughly to decompose under the effect of plasma body, reacted mixed gas reenters stripping in tap water after alkali liquor absorption, the gas producing plasma discharge can utilize in closed cycle, and realize degradation production and be separated with tap water, therefore PH value of drinking water is not changed, without atmospheric pollution.Electric discharge is under atmospheric pressure carried out, and does not need vacuum unit and particular power source, operating safety, and industry is amplified easily, and THMs removal efficiency is high, has broad application prospects.
Accompanying drawing explanation
Fig. 1 is the structural representation that plasma body of the present invention removes haloform device embodiment in tap water.
Embodiment
Following examples will the present invention is further illustrated by reference to the accompanying drawings.
Fig. 1 provides the structural representation that plasma body of the present invention removes haloform device embodiment in tap water, is provided with reactor 1, oxygen cylinder 2, argon bottle 3, gas discharge tube 4, high frequency electric source 5, alkaline tank 6 and gas recycle pump 7.Gas in oxygen cylinder 2 and argon bottle 3 passes into reactor 1, reactor 1 air outlet connects gas discharge tube 4, gas discharge tube 4 is connected with high frequency electric source 5, gas discharge tube 4 air outlet passes into alkaline tank 6, alkali lye 6 air outlet connects reactor 1 through gas recycle pump 7, and the gas after alkali liquor absorption is passed into reactor 1 again.
Gas discharge tube 4 can adopt Glass tubing or silica tube etc., and interior electrode is copper rod (pipe) or stainless steel bar (pipe), and dispatch from foreign news agency is aluminium flake or iron plate very.
The discharge frequency of described high frequency electric source is 50 ~ 10000Hz.
Below provide the embodiment of the method that described plasma body removes haloform in tap water, adopt plasma body described in Fig. 1 to remove haloform device in tap water.
Embodiment 1
Be add tap water 10L in the reactor 1 of 15L to cubic capacity; Open oxygen cylinder 2 and argon bottle 3, insufflation gas 10L in reactor 1, reactor 1 internal pressure is 1 normal atmosphere, and the volume ratio of oxygen and argon gas is 1.0%; Open gas recycle pump 7, make haloform in water be brought into gas discharge tube 4; Open high frequency electric source 5, gas is breakdown, forms plasma body, process water inlet in gas discharge tube 4.Experiment condition is as follows: the material of gas discharge tube 4 is quartz, caliber 20mm, length 20cm, discharging gap 1.5mm; interior electrode is copper pipe, and dispatch from foreign news agency is aluminium foil very, and supply frequency is 1000Hz, power 50W; gas flow rate 25ml/s, alkaline tank naoh concentration 2.0mol/L, volume 200mL; Trichloromethane concentration 120 μ g/L; Dichloro-monobromo methane concentration 90 μ g/L; Chlorodibromomethane concentration 60 μ g/L; Methenyl bromide concentration 30 μ g/L; Initial pH6.9; In water, haloform National Standard Method measures, and pH acidometer is measured.The data obtained is as shown in table 1.
Table 1
| Discharge time (min) | 0 | 2 | 5 | 10 | 15 |
| Trichloromethane (μ g/L) | 120 | 53 | 24 | 8 | 2.8 |
| Dichloro-monobromo methane (μ g/L) | 90 | 39 | 13 | 4 | 1.6 |
| Chlorodibromomethane (μ g/L) | 60 | 27 | 9 | 3 | 0.9 |
| Methenyl bromide (μ g/L) | 30 | 11 | 4.7 | 2 | 0.8 |
| pH | 6.9 | 6.8 | 6.9 | 7.1 | 7.0 |
Embodiment 2
Be add tap water 8.0L in the reactor 1 of 10L to cubic capacity; Open oxygen, argon gas steel cylinder, insufflation gas 2.0L in reactor 1, reactor 1 internal pressure is 1 normal atmosphere, and the volume ratio of oxygen and argon gas is 0.5%; Open gas recycle pump, make haloform in water be brought into discharge tube; Open high frequency electric source, gas is breakdown, forms plasma body, process water inlet inside the Pass electric discharge.
Experiment condition is as follows: discharge tube material, quartz; Caliber, 20mm; Length, 20cm; Discharging gap, 1.5mm; Interior electrode, copper pipe; Outer electrode, aluminium foil; Supply frequency, 5000Hz, power, 40W; Gas flow rate, 10ml/s; Alkaline tank naoh concentration, 3.0mol/L, volume, 200mL; Trichloromethane concentration, 110 μ g/L; Dichloro-monobromo methane concentration, 92 μ g/L; Chlorodibromomethane concentration, 55 μ g/L; Methenyl bromide concentration, 32 μ g/L; Initial pH, 6.6; In water, haloform National Standard Method measures, and pH acidometer is measured.The data obtained is as shown in table 2.
Table 2
| Discharge time (min) | 0 | 2 | 5 | 10 | 15 |
| Trichloromethane (μ g/L) | 110 | 57 | 22 | 6.7 | 1.9 |
| Dichloro-monobromo methane (μ g/L) | 92 | 35 | 11 | 3.1 | 1.2 |
| Chlorodibromomethane (μ g/L) | 55 | 24 | 7.5 | 2.7 | 0.6 |
| Methenyl bromide (μ g/L) | 32 | 9.5 | 3.9 | 1.3 | 0.5 |
| pH | 6.6 | 6.7 | 6.8 | 6.7 | 6.7 |
The shortcomings such as Chlorination Disinfection By-products in Drinking Water THMs has huge harm to HUMAN HEALTH, and the method at present for drinking water advanced treatment mainly contains membrane technique, ozone oxidation and activated carbon adsorption, but all there is function singleness, and the low and running cost of removal efficiency is high.On the basis of the present invention's haloform in gas circulation stripping water, the electrochemical process of discharge plasma is utilized to form various active material, as H, OH, the atom, molecule etc. of excited state, remove haloform in water efficiently rapidly, do not need additionally to add chemical agent, power supply is simple, capacity usage ratio is high, does not change the pH value of water, realizes degraded product and is separated with water, overcoming conventional gas phase electric discharge and easily produce degradation shortcoming under secondary pollution and water outlet pH, is a kind of new type water treatment technology of efficient green.
Claims (4)
1. plasma body removes the method for haloform in tap water, it is characterized in that using plasma removes haloform device in tap water, described plasma body is removed haloform device in tap water and is provided with reactor, gas discharge tube, gas recycle pump, alkaline tank, electrode and high frequency electric source; Described reactor is provided with oxygen inlet mouth, argon inlet mouth, recycle gas inlet mouth and recycle gas air outlet; Gas in reactor after aeration stripping enters gas discharge tube, and gas discharge tube is connected with high frequency electric source, and the gas after gas discharge tube degraded passes into alkaline tank; Alkaline tank air outlet connects gas recycle pump, and the gas after alkali liquor absorption is passed into reaction vessel again; The discharge frequency of described high frequency electric source is 50 ~ 10000Hz; Described alkali lye is selected from sodium hydroxide or potassium hydroxide, and the concentration of alkali lye is 0.1 ~ 5mol/L;
Said method comprising the steps of:
1), after reactor water flowing, oxygen and argon gas is passed into; The volume ratio of described oxygen and argon gas is (0.1 ~ 10): 100; The volume ratio of gas and water is (0.1 ~ 5): 1;
2) open gas recycle pump, adjustments of gas flow velocity is at 5 ~ 100ml/s;
3) high frequency electric source is opened, electric discharge starts, in gas discharge tube, utilize gas phase discharges to process air inlet, give vent to anger during electric discharge and be automatically passed into alkaline tank, wherein hydrogen halide and carbonic acid gas are absorbed, and residual gas is pumped back to reaction vessel by gas circulation, continue haloform in stripping water and enter discharge tube degraded, when being greater than 10min upon discharging, haloform clearance more than 90% in water;
4) when oxygen content in discharge tube by volume percentage calculation lower than 0.05% time, by oxygen bottle supplemental oxygen to 0.1% ~ 10%, when concentration of lye in alkaline tank is lower than 0.05mol/L, supplement alkali lye to 0.1 ~ 5mol/L.
2. plasma body removes the method for haloform in tap water as claimed in claim 1, and it is characterized in that described gas discharge tube adopts Glass tubing or silica tube, interior electrode adopts copper rod, copper pipe, stainless steel bar or stainless steel tube, and outer electrode adopts aluminium flake or iron plate.
3. plasma body removes the method for haloform in tap water as claimed in claim 1, it is characterized in that in step 3) in, described when utilizing gas phase discharges to process air inlet in gas discharge tube, containing oxygen, argon gas, water vapour, hydrogen halide, carbonic acid gas and undecomposed THMs in giving vent to anger.
4. plasma body removes the method for haloform in tap water as claimed in claim 1, it is characterized in that in step 4) in, the magnitude of recruitment of described oxygen and alkali lye calculates by following chemical equation:
2HCX
3+2H
2O+O
2+10OH
-→6X
-+2CO
3 2-
Wherein, X=Cl, Br, or I.
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| CN104843821A (en) * | 2015-04-20 | 2015-08-19 | 南京大学 | Immersion type needle-plate discharge plasma sewage treatment unit |
| CN104828898B (en) * | 2015-04-20 | 2017-12-01 | 南京大学 | A kind of immersion plate plate discharge plasma sewage-treatment plant |
| CN110361470A (en) * | 2019-07-18 | 2019-10-22 | 厦门理工学院 | Measure discharge plasma-ion chromatographic method of total organic halogen content in water |
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