CN110498499A - A kind of disinfectant reducing Disinfection Byproducts in Drinking Water concentration - Google Patents
A kind of disinfectant reducing Disinfection Byproducts in Drinking Water concentration Download PDFInfo
- Publication number
- CN110498499A CN110498499A CN201910705979.5A CN201910705979A CN110498499A CN 110498499 A CN110498499 A CN 110498499A CN 201910705979 A CN201910705979 A CN 201910705979A CN 110498499 A CN110498499 A CN 110498499A
- Authority
- CN
- China
- Prior art keywords
- disinfectant
- drinking water
- disinfection byproducts
- water concentration
- persulfate
- 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.)
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Classifications
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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
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The present invention provides a kind of disinfectants for reducing Disinfection Byproducts in Drinking Water concentration, the disinfectant is made of persulfate or persulfuric acid hydrogen salt, chloride and solvent, the concentration of persulfate or persulfuric acid hydrogen salt is 90-120g/L, the concentration of chloride is 20-30g/L, is 3-7g/L by the effective chlorine density that said components obtain.The disinfectant applies to drinking water disinfection, and the angle combined from source control and process control provides a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration, can be effectively reduced the concentration of Disinfection Byproducts in Drinking Water, to improve the safety of drinking water.
Description
Technical field
The invention belongs to water-treatment technology fields, are related to a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration.
Background technique
Disinfection Processes in Drinking Water Treatment achievees the purpose that guarantee drinking water safety by inactivated pathogenic bacteria, but also produces simultaneously
A series of disinfection by-products produce threat to people's health.Haloform is as the first the disinfection pair for finding and authenticating
Product, has been included in water quality management standard, and subsequent halogen acetic acid class and the carbon containing disinfection by-products of halo-furan ketone are found in succession.Closely
Nian Lai, novel nitrogenous disinfection byproducts such as halogen acid amide, halogen acetonitrile and molecular structure are identified successively.Most
Disinfection by-products all has cytotoxicity, neurotoxicity, mutagenicity, genetoxic, teratogenesis and carcinogenicity.Therefore, it reduces
Disinfection Byproducts in Drinking Water generates particularly important.
From early 20th century, chlorine is applied to drinking water treatment for the first time as disinfectant, for the research of drinking water disinfection
It is more and more.Although disinfection by chlorine can effective degerming, while at low cost, material source is convenient, and adding equipment is simple, is easy to grasp
The advantages that making, but a large amount of disinfection by-products can be generated in disinfecting process.Persulfate has certain oxidisability, widely
It is used in swimming pool and drinking water treatment, can all have killing effect, strong oxygen to various microorganisms, virus, fungi, protozoon etc.
Change ability can remove the algae toxin for leading to liver cancer, degrade various chemical pollutants, remains of pesticide, heavy metal, algae etc., but its
Bactericidal effect is bad.Persulfate can aoxidize chloride ion be effective chlorine, thus improve to various microorganisms, virus, fungi,
The killing effect of protozoon.Since the presence of disinfection by-products has harm to human health, control disinfection by-products is to work as
It is engaged in anxious.
The control method of disinfection by-products may be summarized to be three aspects at present: (1) source controls: going to remove water before disinfection
In the precursor substance substance of disinfection by-products (can be reacted with disinfectant generate), lacked reactant, disinfection by-products is by nothing
Method generates.But need to arouse attention, when Biological Pretreatment and biological activated carbon non-steady state are run caused by biology
Metabolite leakage, may cause the production quantity of subsequent disinfection by-products to increase.(2) process control: mainly pass through change
Sterilization process parameter or disinfection way reduce formation of the disinfection by-products in disinfecting process, that is, are guaranteeing sterilization effect
On the basis of change sterilization process parameter, to reduce the concentration of disinfection by-products；(3) end-of-pipe control: the disinfection to having generated
By-product is removed.But in pipe network transmission process, precursor and chlorine residue exist simultaneously and also will continue to generate disinfection by-product
Object, therefore this mode cannot eradicate disinfection by-products.
Summary of the invention
Aiming at the shortcomings in the prior art, the object of the present invention is to provide a kind of reduction Disinfection Byproducts in Drinking Water concentration
Disinfectant.
In order to achieve the above objectives, the technical scheme is that
A kind of disinfectant reducing Disinfection Byproducts in Drinking Water concentration, component includes persulfate or hydrogen persulfate
Salt, chloride and solvent.
The concentration of the persulfate or persulfuric acid hydrogen salt is 90-120g/L.
The concentration of the chloride is 20-30g/L.
The persulfate or persulfuric acid hydrogen salt and chloride molar concentration ratio are 0.5-1.2.
The concentration of the disinfectant effective chlorine is 3-7g/L.
The persulfate is at least one of sodium peroxydisulfate, potassium peroxydisulfate, ammonium persulfate.
The persulfuric acid hydrogen salt is at least one of potassium hydrogen persulfate, hydrogen persulfate sodium, hydrogen persulfate amine.
The chloride is at least one of sodium chloride, potassium chloride, calcium chloride.
The solvent is ultrapure water.
The ultrapure water be not only the conducting medium in water was almost removed, but also by the colloidal substance not dissociated in water,
Gas and organic matter are removed to the water of very low degree.
The resistivity of the ultrapure water is greater than 18M Ω * cm or close to 18.3M Ω * cm limiting value (25 DEG C).
By adopting the above scheme, the beneficial effects of the present invention are:
The first, the disinfectant of the invention used reduces in drinking water to a certain extent compared with hypochlorite disinfectant
Disinfection by-products (chloroform, trichlorine glyoxylic, two chloroacetonitriles, Tritox, dichloro acetamide, trichloroacetamide etc.) is dense
Degree, to reduce the toxicity of drinking water, improves the safety of drinking water.
The second, reaction condition of the invention is mild, to save human and material resources and financial resources.
Reduction that third, the present invention from the angle of source control and process control provide pre-oxidation and disinfection is combined as a whole
The disinfectant of disinfection by-products concentration, there is no need to be pre-oxidized to water body, to save human and material resources and financial resources.
Specific embodiment
The present invention is further illustrated with reference to embodiments.
Embodiment 1:
12g potassium hydrogen persulfate solid and 2g solid sodium chloride are put into beaker, the dissolution of 70mL ultrapure water is added, then moves
The constant volume into 100mL volumetric flask.Solution after constant volume is placed on constant temperature (25 DEG C) concussion and cultivate case reaction 0.5h to be uniformly mixed
To disinfectant of the present invention, hydrogen persulfate potassium concn is 120g/L in disinfectant, sodium chloride concentration 20g/L, persulfuric acid hydrogen salt and
Chloride molar concentration ratio is 1.2, effective chlorine 3g/L, and water body dissolved organic carbon is 10mg/L, pH=6 when disinfection.Disappear
Testing result is shown in Table 1 after poison.
Embodiment 2:
9g potassium peroxydisulfate solid and 3g solid sodium chloride are put into beaker, the dissolution of 70mL ultrapure water is added, then moves to
Constant volume in 100mL volumetric flask, by the solution after constant volume be placed on constant temperature (25 DEG C) concussion and cultivate case reaction 0.5h be uniformly mixed obtain
Disinfectant of the present invention, potassium peroxydisulfate concentration is 90g/L, sodium chloride concentration 30g/L, persulfuric acid hydrogen salt and chloride in disinfectant
Molar concentration ratio is 0.5, effective chlorine 7g/L, and water body dissolved organic carbon is 5mg/L, pH=7 when disinfection.It is detected after disinfection
It the results are shown in Table 1.
Embodiment 3:
10.5g potassium peroxydisulfate solid and 2.4g solid sodium chloride are put into beaker, the dissolution of 70mL ultrapure water is added, then
Constant volume in 100mL volumetric flask is moved to, the solution after constant volume is placed on constant temperature (25 DEG C) concussion and cultivate case reaction 0.5h and is uniformly mixed
Disinfectant of the present invention is obtained, hydrogen persulfate potassium concn is 105g/L, sodium chloride concentration 24g/L, persulfuric acid hydrogen salt in disinfectant
It is 0.8 with chloride molar concentration ratio, effective chlorine 6.2g/L, water body dissolved organic carbon is 5mg/L, pH=8 when disinfection.
Testing result is shown in Table 1 after disinfection.
Embodiment 4:
10.5g potassium peroxydisulfate solid and 2.4g solid sodium chloride are put into beaker, the dissolution of 70mL ultrapure water is added, then
Constant volume in 100mL volumetric flask is moved to, the solution after constant volume is placed on constant temperature (25 DEG C) concussion and cultivate case reaction 0.5h and is uniformly mixed
Obtain disinfectant of the present invention, in disinfectant potassium peroxydisulfate concentration be 105g/L, sodium chloride concentration 24g/L, persulfuric acid hydrogen salt and
Chloride molar concentration ratio is 0.8, effective chlorine 6.2g/L, water body dissolved organic carbon 0.1mg/L, pH=9 when disinfection.Disappear
Testing result is shown in Table 1 after poison.
The rate of descent of disinfection by-products is generated in 1 water body of table
Rate of descent in table is that the concentration of disinfection by-products disappears with when invention disinfectant sterilizes in hypochlorite disinfectant
The difference of the concentration of toxic byproduct divided by the disinfection by-products in hypochlorite disinfectant concentration.As known from Table 1, a kind of reduction is drunk
The disinfectant of disinfection by-products concentration has good control action, three chloromethanes to disinfection by-products compared to hypochlorite disinfectant in water
The rate of descent of alkane (CF) is 6.81-25.28%, and the rate of descent of trichlorine glyoxylic (CH) is 2.79-42.36%, two chloroacetonitriles
(DCAN) rate of descent is 10.10-49.88%, and the rate of descent of Tritox (TCAN) is 7.65-100%, dichloro acetamide
(DCAM) rate of descent is 3.31-48.33%, and the rate of descent of trichloroacetamide (TCAM) is 0.26-11.81%.Therefore this hair
A kind of bright disinfectant for reducing Disinfection Byproducts in Drinking Water concentration, which forms disinfection by-products, has good inhibiting effect.
The above-mentioned description to embodiment is that this hair can be understood and used for the ease of those skilled in the art
It is bright.Those skilled in the art obviously readily can make various modifications to these embodiments, and described herein one
As principle be applied in other embodiments, without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments.
Those skilled in the art's principle according to the present invention, not departing from improvement that scope of the invention is made and modification all should be at this
Within the protection scope of invention.
Claims (10)
1. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration, it is characterised in that: the disinfectant component includes over cure
Hydrochlorate or persulfuric acid hydrogen salt, chloride and solvent.
2. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
The concentration for stating persulfate or persulfuric acid hydrogen salt is 90-120g/L.
3. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
The concentration for stating chloride is 20-30g/L.
4. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
It states persulfate or persulfuric acid hydrogen salt and chloride molar concentration ratio is 0.5-1.2.
5. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
Stating disinfectant effective chlorine density is 3-7g/L.
6. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
Stating persulfate is at least one of sodium peroxydisulfate, potassium peroxydisulfate, ammonium persulfate.
7. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
Stating persulfuric acid hydrogen salt is at least one of potassium hydrogen persulfate, hydrogen persulfate sodium, hydrogen persulfate amine.
8. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
Stating chloride is at least one of sodium chloride, potassium chloride, calcium chloride.
9. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, it is characterised in that: institute
Stating solvent is ultrapure water.
10. a kind of disinfectant for reducing Disinfection Byproducts in Drinking Water concentration according to claim 1, feature is in institute
It states the resistivity of ultrapure water and is greater than 18M Ω * cm at 25 DEG C or close to 18.3M Ω * cm limiting value.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111480656A (en) * | 2020-04-30 | 2020-08-04 | 同济大学 | Method suitable for efficiently preparing high-concentration disinfectant monochloramine in water works |
| CN113371901A (en) * | 2021-04-20 | 2021-09-10 | 同济大学 | Method for controlling bromate and brominated disinfection byproducts in drinking water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111480656A (en) * | 2020-04-30 | 2020-08-04 | 同济大学 | Method suitable for efficiently preparing high-concentration disinfectant monochloramine in water works |
| CN113371901A (en) * | 2021-04-20 | 2021-09-10 | 同济大学 | Method for controlling bromate and brominated disinfection byproducts in drinking water |
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