CN108383229A - A method of strengthening manganese sand using sulphite and removes thallium in water removal - Google Patents
A method of strengthening manganese sand using sulphite and removes thallium in water removal Download PDFInfo
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- CN108383229A CN108383229A CN201711454726.2A CN201711454726A CN108383229A CN 108383229 A CN108383229 A CN 108383229A CN 201711454726 A CN201711454726 A CN 201711454726A CN 108383229 A CN108383229 A CN 108383229A
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- thallium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
A method of strengthening manganese sand using sulphite and remove thallium in water removal, be related to removing thallium method, solve existing except thallium technology reagent consumption is big, processing cost is high, and oxidant easily leaks, and uses problem inconvenient for operation.The present invention's removes thallium method：To sulphite is added in water containing thallium, the filter bed equipped with manganese sand is introduced the water into, sulphite is under the catalytic action of manganese sand, it is potentiometric titrations by oxygen rapid oxidation, then, the monovalence thallium for being adsorbed on manganese sand surface is oxidized to trivalent thallium by potentiometric titrations, enhances removal of the manganese sand to thallium.Advantages of the present invention：Sulfite chemical property is stablized, transport, storage are convenient, it is cheap, and water reducing agent catalogue is drunk by national be formally included in, and it is easy to operate, it need not additionally increase equipment, large-scale application can be carried out in water factory, manganese sand oxygen catalytic oxidation sulphite generation potentiometric titrations speed is fast, and monovalence thallium can be oxidized to trivalent thallium by potentiometric titrations rapidly, except thallium is efficient.
Description
Technical field
The present invention relates to a kind of methods of thallium in drinking water treatment field more particularly to removal drinking water.
Background technology
Thallium is a kind of yttrium of high degree of dispersion, is widely used in chemical industry, electronics, medicine, space flight, high-energy physics
With the industries such as superconductor, while thallium is a kind of very strong element of physiological-toxicity again.Utilization is continually developed due to the resource containing thallium,
The approach that thallium enters water environment is growing.Therefore, thallium becomes the more concerned hypertoxic heavy metal member of water process research field
One of element.Thallium mainly exists with positive mono-valent form in nature, and toxicity is more than arsenic, can pass through alimentary canal, skin contact, drift
The sucking of cloud of dust mist enters human body, leads to human body thallium poisoning.Thallium poisoning can lead to numbness of lower limbs or pain, pain in the back, alopecia, mistake
Bright, headache, lassitude, courbature, brothers' trembling, shakiness of walking etc., the synthesis for even resulting in chromosome aberration, interfering DNA,
Serious thallium poisoning can cause to become plant person.For these reasons, the concentration of thallium in Drinking Water has been done centainly in China
Limitation,《Standards for drinking water quality》(GB5749-2006) limit value of regulation thallium concentration is 0.1 μ g/L in.
In recent years, thallium pollution getting worse in China's water environment, such as the Guangdong Province basins Bei Jiang thallium (Tl+) pollution, directly lead
It causes the health of people to be compromised, seriously threatens public health security, generate larger social influence.Therefore, for by
The source water of heavy metal thallium pollution, which carries out processing, to be particularly important, and exploiting economy, efficient, easily water technology has been compeled
In the eyebrows and eyelashes.
Patent CN102320700B discloses a kind of method of removal thallium pollution in source water of drinking water, pH value is adjusted, using height
Potassium manganate is pre-oxidation agent, makes Tl+It is converted into Tl3+, then add aluminium polychloride, make Tl3+Form Tl (OH)3Precipitation, filtering
Removal.Patent CN103693774B discloses method that is a kind of while removing cadmium and thallium in raw water, and hydroxide is added in raw water
Sodium adjusts pH value to alkalescent, potassium permanganate is then added, sodium hypochlorite or liquid chlorine are added, after oxidation reaction is abundant
Limewash is added in raw water, adjusts pH value, is eventually adding flocculant, carries out flocculation sediment, makes cadmium, thallium and the hydroxide in raw water
Manganese and ferric hydroxide colloid co-precipitation removal.Patent CN102303932A discloses micro in a kind of secondary oxidation removal drinking water
Accessing pending water pH value is adjusted to alkalinity, potassium permanganate is added, adds chlorine, hypochlorous acid or hypochlorite, together by the method for thallium
When add aluminium polychloride coagulation formed floc particle, through precipitation, quartz sand filtration remove thallium.Patent CN102311190A is disclosed
A method of strengthening thallium in conventional water treatment process removal drinking water, accessing pending water pH value is adjusted to alkalinity, Gao Meng is added
Sour potassium makes positive monovalence thallium ion be oxidized to positive trivalent thallium ion, generates thallium hydroxide precipitation, adds the change that can generate chlorion
Object is closed, the trivalent thallium ion of residual ionization is made to form thallium chloride co-ordination complex, while aluminium polychloride coagulation is added and forms wadding
Body particle, thallium hydroxide and thallium chloride co-ordination complex are transferred in floc particle, and thallium is removed by precipitation, sand filtration.Patent
CN104528985A discloses a kind of method removing thallium in waste water, and strong oxidizer KMnO is added into waste water containing thallium4With
H2O2, the monovalence thallium ion in waste water is oxidized to trivalent thallium ion, adds lye, is removed after carrying out coagulation, absorption, precipitation, filtering
Thallium.Patent CN104773878A discloses a kind of method removing Determination of Trace Thallium in sewage, passes through and ferrous sulfate and hydrogen peroxide is added
By the monovalence thallium (Tl in waste water+) it is oxidized to trivalent thallium (Tl3+), lime is then added so that the ferric iron (Fe in water3+) hydrolysis
At cotton-shaped iron hydroxide, power plant's ashes and polyaluminum sulfate aluminum solutions are added, iron hydroxide, thallium hydroxide is made to be adsorbed on ashes and go
It removes.Patent CN103058417A discloses a kind of emergency processing method of the sudden thallium pollution of water head site drinking water, former to pollution
Calcium oxide is added in water, adjusts pH to alkalinity, sodium hypochlorite is then added, adds coagulant ferric trichloride, is obtained after filtering
Drinking water.Patent CN103922514A discloses a kind of minimizing technology of Determination of Trace Thallium in water, and height is added into the water containing Determination of Trace Thallium
Monovalence thallium in water is oxidized to trivalent thallium, then dosing coagulant, by coagulation, precipitation, filtering by ferrite, you can removal
Thallium.Patent CN102145948B, which is disclosed, a kind of in situ to be generated nano-manganese dioxide absorption and removes Tl+And/or Cd2+Water process side
Method, to containing Tl+And/or Cd2+Water in add permanganate and sodium thiosulfate, it is in situ to generate nano-manganese dioxide adsorbent,
Adsorb Tl in water+And Cd2+, coagulant is then added, progress coagulation, precipitation, filtering can remove the Tl in water+And Cd2+.Patent
CN102145947B discloses a kind of in situ nanometer iron and manganese oxides that generate and removes Tl+And/or Cd2+Method for treating water, to containing Tl+
And/or Cd2+Water in add permanganate and ferrous salt, react in situ and generate nanometer iron hydroxide and manganese dioxide composite adsorption
Tl in water is adsorbed in agent+And Cd2+, coagulant is then added, progress coagulation, precipitation, filtering can remove the Tl in water+And Cd2+。
In conclusion it is exactly by adding alkali to adjust pH value, (such as using oxidant to go the main method of thallium in water removal at present：
Permanganate, liquid chlorine, ferrate, hydrogen peroxide etc.) by monovalence thallium (Tl+) it is oxidized to trivalent thallium (Tl3+), then by absorption,
Precipitation, filtering are removed.But these technologies need to add a large amount of alkali and flocculant, medicine when there is adjusting pH value and Adsorption
Agent consumption is big, and processing cost is high, and oxidant easily leaks, and uses disadvantage inconvenient for operation.
Invention content
The purpose of the present invention is to solve existing except that there are reagent consumptions is big for thallium technology, and processing cost is high, and oxidant is easy
Leakage using problem inconvenient for operation, and provides a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand.
The a kind of of the present invention strengthens the method that manganese sand removes thallium in water removal using sulphite, through the following steps that realizing
's：
One, sulphite is added into accessing pending water containing thallium, control sulfite concentration is 5~100mg/L；
Two, the accessing pending water containing sulphite is introduced into the filter bed equipped with manganese sand, after being filtered processing, that is, completed
Strengthen the method that manganese sand removes thallium in water removal using sulphite.
The accessing pending water is that surface water is discharged after coagulation, precipitation process, and flow is shown in Fig. 1.
The sulphite is sodium sulfite (Na2SO3), potassium sulfite (K2SO3), calcium sulfite (CaSO3), bisulfite
Sodium (NaHSO3), potassium bisulfite (KHSO3) one or more of mixture.
The a kind of of the present invention strengthens the principle that manganese sand goes the method for thallium in water removal using sulphite：Water sulfite salt
(SO3 2-) under the catalytic action of manganese sand, by oxygen (O2) rapid oxidation be potentiometric titrations (SO4 ·-), see reaction equation (1) extremely
(3), then, the potentiometric titrations of generation will can be adsorbed on rapidly the monovalence thallium (Tl on manganese sand surface+) oxidation generate be easy to
Trivalent thallium (the Tl of removal3+), see that reaction equation (4), manganese sand are thallious 5~10 times to thallic adsorption capacity, sulfurous acid
Salt enhances removal of the manganese sand to thallium in water, achievees the purpose that except thallium.
SO4 -+Tl+→Tl3++SO4 2- (4)
A kind of method for removing thallium in water removal using sulphite reinforcing manganese sand of the present invention has the following advantages：
(1) sulfite chemical property is stablized, and transport, storage are convenient, cheap, are commercially easy to get；
(2) sulphite drinks water reducing agent catalogue by national be formally included in, easy to operate, need not additionally increase
Oil (gas) filling device does not change the original treatment process of water factory, can carry out large-scale application；
(3) it is fast to generate potentiometric titrations speed for manganese sand oxygen catalytic oxidation sulphite；
(4) potentiometric titrations can be rapidly by monovalence thallium (Tl+) aoxidize the trivalent thallium (Tl for generating and being easily removed3+), thallium
Removal efficiency is high, and removal rate is up to 96% or more.
Description of the drawings
Fig. 1 is a kind of technological process for going the method for thallium in water removal using sulphite reinforcing manganese sand；
Fig. 2 is to strengthen the breakthrough curve that manganese sand removes thallium in water removal using sulphite, wherein ■ indicates the independent mistake of manganese sand
Filter, ● indicate that sodium sulfite strengthens filtration with manganese sand.
Specific implementation mode
Technical solution of the present invention is not limited to act specific implementation mode set forth below, further includes between each specific implementation mode
Arbitrary combination.
Specific implementation mode one：The a kind of of present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite,
Through the following steps that realize：
One, sulphite (SO is added into accessing pending water containing thallium3 2-), control sulfite concentration is 5~100mg/L；
Two, the accessing pending water containing sulphite is introduced into the filter bed equipped with manganese sand, after being filtered processing, that is, completed
Strengthen the method that manganese sand removes thallium in water removal using sulphite.
The accessing pending water is that surface water is discharged after coagulation, precipitation process, and flow is shown in Fig. 1.
The a kind of of present embodiment strengthens the principle that manganese sand goes the method for thallium in water removal using sulphite：Water sulfite
Salt (SO3 2-) under the catalytic action of manganese sand, by oxygen (O2) rapid oxidation be potentiometric titrations (SO4 ·-), see reaction equation (1)
To (3), then, the potentiometric titrations of generation will can be adsorbed on rapidly the monovalence thallium (Tl on manganese sand surface+) oxidation generation is easily
In the trivalent thallium (Tl of removal3+), see that reaction equation (4), manganese sand are thallious 5~10 times to thallic adsorption capacity, sulfurous
Hydrochlorate enhances removal of the manganese sand to thallium in water, achievees the purpose that except thallium.
SO4 -+Tl+→Tl3++SO4 2- (4)
A kind of method for removing thallium in water removal using sulphite reinforcing manganese sand of present embodiment has the following advantages：
(1) sulfite chemical property is stablized, and transport, storage are convenient, cheap, are commercially easy to get；
(2) sulphite drinks water reducing agent catalogue by national be formally included in, easy to operate, need not additionally increase
Oil (gas) filling device does not change the original treatment process of water factory, can carry out large-scale application；
(3) it is fast to generate potentiometric titrations speed for manganese sand oxygen catalytic oxidation sulphite；
(4) potentiometric titrations can be rapidly by monovalence thallium (Tl+) aoxidize the trivalent thallium (Tl for generating and being easily removed3+), thallium
Removal efficiency is high.
Specific implementation mode two：The present embodiment is different from the first embodiment in that：In the accessing pending water
Sulfite concentration is 10~90mg/L.It is other same as the specific embodiment one.
Specific implementation mode three：The present embodiment is different from the first and the second embodiment in that：The accessing pending water
In sulfite concentration be 15~80mg/L.It is other the same as one or two specific embodiments.
Specific implementation mode four：Unlike one of present embodiment and specific implementation mode one to three：Described waits locating
It is 20~70mg/L to manage the sulfite concentration in water.It is other identical as one of specific implementation mode one to three.
Specific implementation mode five：Unlike one of present embodiment and specific implementation mode one to four：Described waits locating
It is 30~60mg/L to manage the sulfite concentration in water.It is other identical as one of specific implementation mode one to four.
Specific implementation mode six：Unlike one of present embodiment and specific implementation mode one to five：Described waits locating
It is 40~50mg/L to manage the sulfite concentration in water.It is other identical as one of specific implementation mode one to five.
Specific implementation mode seven：Unlike one of present embodiment and specific implementation mode one to six：Sulphite is
Sodium sulfite (Na2SO3), potassium sulfite (K2SO3), calcium sulfite (CaSO3), sodium hydrogensulfite (NaHSO3), potassium bisulfite
(KHSO3) one or more of mixture.Other steps and parameter are identical as one of specific implementation mode one to six.
When present embodiment sulfite salt is mixture, with arbitrary than mixing.
Beneficial effects of the present invention are verified by following embodiment：
Embodiment 1：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：To containing 1.0 μ g/L monovalence thalliums (Tl+) water in, 20mg/L sodium sulfites (Na is added2SO3), then will
Water introduces manganese sand filtration column (manganese sand filtration pillar height is 50cm, a diameter of 2cm) and is filtered, and filtering velocity 8m/h, different time utilizes
Gas ions mass spectrograph measures the concentration of remaining thallium in water after filter, and the removal effect of thallium is shown in Fig. 2.Penetrating for thallium is adsorbed by Fig. 2 manganese sand
Curve is it is found that when manganese sand individually filters (in figure shown in ■), and after filtering carries out 20h, manganese sand reaches saturation, thallium to the adsorbance of thallium
It penetrates；When sodium sulfite is added into manganese sand (in figure ● shown), manganese sand significantly increases the adsorbance of thallium, manganese sand after 150h
Saturation is reached to the adsorbance of thallium, thallium penetrates.Mainly certainly due to the sulfate radical of manganese sand oxygen catalytic oxidation sulphite generation
Monovalence thallium is oxidized to trivalent thallium by base, and manganese sand is thallious 5~10 times to thallic adsorbance.
Embodiment 2：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 1.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
20mg/L sodium sulfites (Na2SO3), it is introduced into manganese sand filter, using remaining in plasma mass spectrograph test water outlet after filtering
A concentration of 0.04 μ g/L of thallium, removal rate are less than up to 96%《Standards for drinking water quality》(GB5749-2006) thallium is provided in
The limit value of a concentration of 0.l μ g/L.
Embodiment 3：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 1.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
20mg/L potassium sulfites (K2SO3), it is introduced into manganese sand filter, using remaining in plasma mass spectrograph test water outlet after filtering
A concentration of 0.04 μ g/L of thallium, removal rate are less than up to 96%《Standards for drinking water quality》(GB5749-2006) thallium is provided in
The limit value of a concentration of 0.l μ g/L.
Embodiment 4：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 1.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
20mg/L calcium sulfites (CaSO3), it is introduced into manganese sand filter, using remaining in plasma mass spectrograph test water outlet after filtering
A concentration of 0.04 μ g/L of thallium, removal rate are less than up to 96%《Standards for drinking water quality》(GB5749-2006) thallium is provided in
The limit value of a concentration of 0.l μ g/L.
Embodiment 5：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 1.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
20mg/L sodium hydrogensulfites (NaHSO3), it is introduced into manganese sand filter, using in plasma mass spectrograph test water outlet after filtering
A concentration of 0.03 μ g/L of remaining thallium, removal rate are less than up to 97%《Standards for drinking water quality》(GB5749-2006) rule in
Determine the limit value of a concentration of 0.l μ g/L of thallium.
Embodiment 6：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 1.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
20mg/L potassium bisulfites (KHSO3), it is introduced into manganese sand filter, using surplus in plasma mass spectrograph test water outlet after filtering
A concentration of 0.03 μ g/L of remaining thallium, removal rate are less than up to 97%《Standards for drinking water quality》(GB5749-2006) regulation in
The limit value of a concentration of 0.l μ g/L of thallium.
Embodiment 7：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 2.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
50mg/L sulphite, sulphite are by potassium sulfite (K2SO3) and sodium sulfite (Na2SO3) it is 1 in molar ratio:1 ratio
Example mixes, and is introduced into manganese sand filter, and remaining thallium is a concentration of in being discharged using plasma mass spectrograph test after filtering
0.05 μ g/L, removal rate are less than up to 97.5%《Standards for drinking water quality》(GB5749-2006) regulation thallium is a concentration of in
The limit value of 0.l μ g/L.
Embodiment 8：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 2.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
50mg/L sulphite, sulphite are by potassium sulfite (K2SO3) and calcium sulfite (CaSO3) it is 1 in molar ratio:1 ratio
It mixes, is introduced into manganese sand filter, remaining thallium is a concentration of in being discharged using plasma mass spectrograph test after filtering
0.04 μ g/L, removal rate are less than up to 98%《Standards for drinking water quality》(GB5749-2006) a concentration of 0.l μ of regulation thallium in
The limit value of g/L.
Embodiment 9：The present embodiment it is a kind of using sulphite strengthen manganese sand go water removal in thallium method, be by with
What lower step was realized：Containing 2.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
50mg/L sulphite, sulphite are by potassium sulfite (K2SO3) and sodium hydrogensulfite (NaHSO3) it is 1 in molar ratio:1
Ratio mixes, and is introduced into manganese sand filter, and the concentration of remaining thallium in plasma mass spectrograph test water outlet is utilized after filtering
For 0.04 μ g/L, removal rate is less than up to 98%《Standards for drinking water quality》(GB5749-2006) regulation thallium is a concentration of in
The limit value of 0.l μ g/L.
Embodiment 10：The a kind of of the present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite, is to pass through
What following steps were realized：Containing 2.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
50mg/L sulphite, sulphite are by potassium sulfite (K2SO3) and potassium bisulfite (KHSO3) it is 1 in molar ratio:1 ratio
Example mixes, and is introduced into manganese sand filter, and remaining thallium is a concentration of in being discharged using plasma mass spectrograph test after filtering
0.04 μ g/L, removal rate are less than up to 98%《Standards for drinking water quality》(GB5749-2006) a concentration of 0.l μ of regulation thallium in
The limit value of g/L.
Embodiment 11：The a kind of of the present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite, is to pass through
What following steps were realized：Containing 2.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
50mg/L sulphite, sulphite are by potassium sulfite (K2SO3), sodium sulfite (Na2SO3) and potassium bisulfite (KHSO3)
It is 1 in molar ratio:1:1 ratio mixes, and is introduced into manganese sand filter, is tested out using plasma mass spectrograph after filtering
A concentration of 0.03 μ g/L of remaining thallium, removal rate are less than up to 98.5% in water《Standards for drinking water quality》(GB5749-
2006) limit value of a concentration of 0.l μ g/L of regulation thallium in.
Embodiment 12：The a kind of of the present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite, is to pass through
What following steps were realized：Containing 3.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
80mg/L sulphite, sulphite are by potassium sulfite (K2SO3), sodium sulfite (Na2SO3), calcium sulfite (CaSO3) and it is sub-
Potassium acid sulfate (KHSO3) it is 1 in molar ratio:1:1:1 ratio mixes, and is introduced into manganese sand filter, is utilized after filtering
A concentration of 0.05 μ g/L of remaining thallium, removal rate are less than up to 98.3% in the test water outlet of gas ions mass spectrograph《Drinking Water is defended
Raw standard》(GB5749-2006) limit value of a concentration of 0.l μ g/L of regulation thallium in.
Embodiment 13：The a kind of of the present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite, is to pass through
What following steps were realized：Containing 3.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
80mg/L sulphite, sulphite are by potassium sulfite (K2SO3), sodium sulfite (Na2SO3), calcium sulfite (CaSO3), it is sub-
Niter cake (NaHSO3) and potassium bisulfite (KHSO3) it is 1 in molar ratio:1:1:1:1 ratio mixes, and is introduced into
Manganese sand filter is reached after filtering using a concentration of 0.04 μ g/L of remaining thallium in plasma mass spectrograph test water outlet, removal rate
98.7%, it is less than《Standards for drinking water quality》(GB5749-2006) limit value of a concentration of 0.l μ g/L of regulation thallium in.
Embodiment 14：The a kind of of the present embodiment strengthens the method that manganese sand removes thallium in water removal using sulphite, is to pass through
What following steps were realized：Containing 5.0 μ g/L monovalence thalliums (Tl+) surface water be added into water outlet after coagulation, precipitation process
80mg/L sulphite, sulphite are by potassium sulfite (K2SO3), sodium sulfite (Na2SO3), calcium sulfite (CaSO3), it is sub-
Niter cake (NaHSO3) and potassium bisulfite (KHSO3) it is 1 in molar ratio:1:1:1:1 ratio mixes, and is introduced into
Manganese sand filter is reached after filtering using a concentration of 0.05 μ g/L of remaining thallium in plasma mass spectrograph test water outlet, removal rate
99%, it is less than《Standards for drinking water quality》(GB5749-2006) limit value of a concentration of 0.l μ g/L of regulation thallium in.
It can be seen that strengthening the method that manganese sand removes thallium in water removal using sulphite has advantage more outstanding.
Claims (10)
1. a kind of strengthening the method that manganese sand removes thallium in water removal using sulphite, it is characterised in that it is through the following steps that realize
's：
One, sulphite is added into accessing pending water containing thallium, control sulfite concentration is 5~100mg/L；
Two, the accessing pending water containing sulphite is introduced into the filter bed equipped with manganese sand, after being filtered processing, i.e., described in completion
Using sulphite strengthen manganese sand go water removal in thallium method.
2. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulphite is the mixed of one or more of sodium sulfite, potassium sulfite, calcium sulfite, sodium hydrogensulfite, potassium bisulfite
Close object.
3. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
The accessing pending water is water outlet of the surface water after coagulation, precipitation process.
4. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 10~90mg/L.
5. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 15~80mg/L.
6. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 20~70mg/L.
7. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 30~60mg/L.
8. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 40~50mg/L.
9. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
Sulfite concentration in the accessing pending water is 35mg/L.
10. a kind of method for removing thallium in water removal using sulphite reinforcing manganese sand according to claim 1, it is characterised in that
A concentration of 0.1~10 μ g/L of thallium in the accessing pending water.
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Application publication date: 20180810 |