CN110436667A - The processing method of iodo haloform in a kind of water body - Google Patents
The processing method of iodo haloform in a kind of water body Download PDFInfo
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- CN110436667A CN110436667A CN201910733276.3A CN201910733276A CN110436667A CN 110436667 A CN110436667 A CN 110436667A CN 201910733276 A CN201910733276 A CN 201910733276A CN 110436667 A CN110436667 A CN 110436667A
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- water body
- iodo
- haloform
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention relates to a kind of processing methods of iodo haloform in drinking water disinfection technical field more particularly to water body.The treating method comprises: A) staying water is mixed with ozone solution, under conditions of being protected from light, stirring, 15~25 DEG C of 20~30min of reaction obtain pretreated water body；The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution is 1:1~16 in the staying water；B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.The processing method of iodo haloform in water body provided by the invention, it is more excellent to the treatment effect of iodo haloform in water body.The experimental results showed that the content of the obtained iodo haloform in purified water body is no more than 75nmol/L using the processing method provided by the present invention.
Description
Technical field
The present invention relates to a kind of processing of iodo haloform in drinking water disinfection technical field more particularly to water body
Method.
Background technique
In recent years, as surface water pollution is increasingly severe, the available water resource of people is reduced year by year, therefore drinking water
Sterilization process is widely used to meet the water demand of people.Currently, chlorine and chloramines disinfection are commonly used disinfection sides
Formula.However a large amount of inorganic ions (such as Br present in water body-And I-Deng) and organic matter can with disinfectant occur a series ofization
Learn reaction formed a variety of disinfection by-products (such as: dibutyl phthalate DBP), wherein iodo disinfection by-products (I-DBP)
It is the disinfection by-products of most genetoxic and cytotoxicity.In order to reduce the formation of I-DBP, common method is to sterilize
Preceding removal DBP precursor (such as: natural organic matter NOM).For example, traditional coagulating treatment method, it can remove most of dissolution
Organic carbon (DOC), however, can not be effectively removed for iodide.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is that providing a kind of processing side of iodo haloform in water body
Method, it is more excellent to the treatment effect of iodo haloform in water body.
The present invention provides a kind of processing methods of iodo haloform in water body, comprising the following steps:
A) staying water is mixed with ozone solution, under conditions of being protected from light, stirring, 15~25 DEG C of reactions 20~
30min obtains pretreated water body；
The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution in the staying water
For 1:1~16；
B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.
Preferably, the staying water includes iodide ion, bromide ion and organic compound.
Preferably, the organic compound includes humic acid and/or fulvic acid.
Preferably, in the staying water, the molar concentration of iodide ion is 3~8 μm of ol/L, the molar concentration of bromide ion
For 8~12 μm of ol/L, the concentration of organic compound is 3~8mg/L.
Preferably, the staying water further includes phosphate buffer；
The pH value of the phosphate buffer is 7.2~7.8；
In the staying water, the molar concentration of phosphate buffer is 0.5~1.5mmol/L.
Preferably, the speed of the stirring is 350~450rpm.
Preferably, the chlorination processing or chlorination amine handle and include:
Chlorine-containing disinfectant or chloramines disinfection agent are added into pretreated water body to add after 24~26h is reacted in sealing
Hypo solution terminates reaction.
Preferably, the chlorine-containing disinfectant includes one or more of HClO, NaClO and KClO；
After chlorine-containing disinfectant is added into pretreated water body, in obtained water body the concentration of chlorine-containing disinfectant be 3~
8mg/L；
The chloramines disinfection agent includes NH2Cl、NHCl2And NHCl3One or more of；
After chloramines disinfection agent is added into pretreated water body, in obtained water body the concentration of chloramines disinfection agent be 3~
8mg/L。
Preferably, the concentration of the hypo solution is 6~7mg/L.
The present invention provides a kind of processing methods of iodo haloform in water body, comprising the following steps: A) it will be to be processed
Water body is mixed with ozone solution, and under conditions of being protected from light, stirring, 15~25 DEG C of 20~30min of reaction obtain pretreated water
Body；The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution is 1:1 in the staying water
~16；B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.The present invention mentions
The processing method of iodo haloform in the water body of confession, it is more excellent to the treatment effect of iodo haloform in water body.
The experimental results showed that using the processing method provided by the present invention, obtained three halogen of iodo in purified water body
The content of methane is no more than 75nmol/L.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
The present invention provides a kind of processing methods of iodo haloform in water body, comprising the following steps:
A) staying water is mixed with ozone solution, under conditions of being protected from light, stirring, 15~25 DEG C of reactions 20~
30min obtains pretreated water body；
The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution in the staying water
For 1:1~16；
B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.
In an embodiment of the present invention, the staying water includes iodide ion, bromide ion and organic compound.In this hair
In bright some embodiments, the organic compound includes humic acid and/or fulvic acid.
In certain embodiments of the present invention, in the staying water, the molar concentration of iodide ion is 3~8 μm of ol/L,
The molar concentration of bromide ion is 8~12 μm of ol/L, and the concentration of organic compound is 3~8mg/L.In certain embodiments, described
The molar concentration of iodide ion is 5 μm of ol/L.In certain embodiments, the molar concentration of the bromide ion is 10 μm of ol/L.At certain
In a little embodiments, the concentration of the organic compound is 5mg/L.
In certain embodiments of the present invention, the staying water further includes phosphate buffer.In certain of the invention
In a little embodiments, the pH value of the phosphate buffer is 7.2~7.8.In certain embodiments, the phosphate buffer
PH value is 7.5.In certain embodiments of the present invention, the molar concentration of the phosphate buffer is 0.5~1.5mmol/L.
In certain embodiments, the molar concentration of the phosphate buffer is 1mmol/L.
In an embodiment of the present invention, the ozone solution is saturation ozone water solution.In certain embodiments of the present invention
In, the saturation ozone water solution is prepared in pure water using ozone generator.Specifically, can be with are as follows: be with purity
99.999% O2For ozone occurring source, ozone generator is accessed, aeration is extremely saturated into pure water.Indigo disulfonic acid can be passed through
Sodium spectrophotometry measures the concentration of saturation ozone water solution.
In the present invention, the initial molar concentration of iodide ion is rubbed with the initial of ozone in ozone solution in the staying water
Your concentration ratio is 1:1~16.In certain embodiments of the present invention, in the staying water iodide ion initial molar concentration
Initial molar concentration ratio with ozone in ozone solution is 1:16.In certain embodiments of the present invention, in the ozone solution
The initial molar concentration of ozone is 70~200 μm of ol/L.In certain embodiments, in the ozone solution ozone initial molar
Concentration is 80 μm of ol/L.
The present invention mixes staying water with ozone solution, under conditions of being protected from light, stirring, 15~25 DEG C of reactions 20~
30min obtains pretreated water body.The present invention is pre-processed using ozone, can be by the I in staying water-Conversion
For IO3 -, effectively reduce the iodo haloform that humic acid generates in chlorination processing or chlorination amine treatment process.
In certain embodiments of the present invention, the speed of the stirring is 350~450rpm.In certain embodiments, institute
The speed for stating stirring is 400rpm.
The temperature of the reaction is 15~25 DEG C.In certain embodiments of the present invention, the temperature of the reaction is 25 DEG C.
The time of the reaction is 20~30min.In certain embodiments of the present invention, the time of the reaction is 30min.
After obtaining pretreated water body, the pretreated water body is subjected to chlorination processing or chlorination amine is handled, is obtained
To purified water body.
In certain embodiments of the present invention, the chlorination processing or chlorination amine handle and include:
Chlorine-containing disinfectant or chloramines disinfection agent are added into pretreated water body to add after 24~26h is reacted in sealing
Hypo solution terminates reaction.
In certain embodiments of the present invention, the chlorine-containing disinfectant includes one of HClO, NaClO and KClO or several
Kind.In certain embodiments of the present invention, after chlorine-containing disinfectant being added into pretreated water body, containing chlorine in obtained water body
The concentration of disinfectant is 3~8mg/L.In certain embodiments, the concentration of chlorine-containing disinfectant is 5mg/L in the water body obtained.
In certain embodiments of the present invention, the chloramines disinfection agent includes NH2Cl、NHCl2And NHCl3One of or
It is several.In certain embodiments of the present invention, after chloramines disinfection agent being added into pretreated water body, chlorine in obtained water body
The concentration of amine disinfectant is 3~8mg/L.In certain embodiments, the concentration of chloramines disinfection agent is 5mg/L in the water body obtained.
In certain embodiments of the present invention, the time for sealing reaction is 24~26h.In certain embodiments, sealing is anti-
The time answered is for 24 hours.In certain embodiments of the present invention, the sealing reaction seals for no head space reacts.
In certain embodiments of the present invention, the concentration of the hypo solution is 6~7mg/L.In certain implementations
In example, the concentration of the hypo solution is 6.5mg/L.
The present invention has no special limitation to the source of the raw material used above, can be general commercially available.
The present invention provides a kind of processing methods of iodo haloform in water body, comprising the following steps: A) it will be to be processed
Water body is mixed with ozone solution, and under conditions of being protected from light, stirring, 15~25 DEG C of 20~30min of reaction obtain pretreated water
Body；The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution is 1:1 in the staying water
~16；B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.The present invention mentions
The processing method of iodo haloform in the water body of confession, it is more excellent to the treatment effect of iodo haloform in water body.
The experimental results showed that using the processing method provided by the present invention, obtained three halogen of iodo in purified water body
The content of methane is no more than 75nmol/L.
Compared to conventional disinfection, the present invention is pre-processed using ozone, and by-product oxygen will not generate two to environment
Secondary pollution, and to I-Removal effect it is more excellent, be suitble to practical water body application.
In order to further illustrate the present invention, below with reference to embodiment to three halogen first of iodo in a kind of water body provided by the invention
The processing method of alkane is described in detail, but they cannot be interpreted as limiting the scope of the present invention.
Raw material used in following embodiment is general commercially available.
Embodiment 1
Preparing natural water body solution, wherein I-, 5mg/L concentration of the Br- containing 10 μm of ol/L concentration, 5 μm of ol/L concentration
Humic acid (HA) and 1mmol/L pH value be 7.5 phosphate buffer.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 80 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chlorine-containing disinfectant HClO is added into pretreated water body, after no head space sealing reaction for 24 hours, adding concentration is
6.5mg/L hypo solution terminates reaction, the water body after being purified.
Through detecting, the content of the iodo haloform in purified water body is 8.5nmol/L.
Embodiment 2
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that humic acid (HA) and 1mmol/L pH value are 7.5.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 80 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chloramines disinfection agent NH is added into pretreated water body2Cl adds concentration after no head space sealing reaction for 24 hours
It terminates and reacts for 6.5mg/L hypo solution, the water body after being purified.
Through detecting, the content of the iodo haloform in purified water body is 73.2nmol/L.
Embodiment 3
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that fulvic acid (FA) and 1mmol/L pH value are 7.5.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 80 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chlorine-containing disinfectant HClO is added into pretreated water body, after no head space sealing reaction for 24 hours, adding concentration is
6.5mg/L hypo solution terminates reaction, the water body after being purified.
Through detecting, the content of the iodo haloform in purified water body is 39.8nmol/L.
Embodiment 4
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that fulvic acid (FA) and 1mmol/L pH value are 7.5.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 80 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chloramines disinfection agent NH is added into pretreated water body2Cl adds concentration after no head space sealing reaction for 24 hours
It terminates and reacts for 6.5mg/L hypo solution, the water body after being purified.
Through detecting, the content of the iodo haloform in purified water body is 31.2nmol/L.
Comparative example 1
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that humic acid (HA) or fulvic acid (FA) and 1mmol/LpH value are 7.5.
By the natural water body solution under conditions of being protected from light, stirring (400rpm), 25 DEG C of reaction 30min obtain pre- place
Water body after reason.
Chlorine-containing disinfectant HClO is added into pretreated water body, after no head space sealing reaction for 24 hours, adding concentration is
6.5mg/L hypo solution terminates reaction, the water body after being purified.
Iodo haloform through detecting, when the organic compound contained in natural water body is HA, in purified water body
Content be 41.3nmol/L；Three halogen of iodo when the organic compound contained in natural water body is FA, in purified water body
The content of methane is 263.3nmol/L.
Comparative example 2
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that humic acid (HA) or fulvic acid (FA) and 1mmol/LpH value are 7.5.
By the natural water body solution under conditions of being protected from light, stirring (400rpm), 25 DEG C of reaction 30min obtain pre- place
Water body after reason.
Chloramines disinfection agent NH is added into pretreated water body2Cl adds concentration after no head space sealing reaction for 24 hours
It terminates and reacts for 6.5mg/L hypo solution, the water body after being purified.
Iodo haloform through detecting, when the organic compound contained in natural water body is HA, in purified water body
Content be 312.6nmol/L；Three halogen of iodo when the organic compound contained in natural water body is FA, in purified water body
The content of methane is 307.5nmol/L.
Comparative example 3
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that humic acid (HA) or fulvic acid (FA) and 1mmol/L pH value are 7.5.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 20 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chlorine-containing disinfectant HClO is added into pretreated water body, after no head space sealing reaction for 24 hours, adding concentration is
6.5mg/L hypo solution terminates reaction, the water body after being purified.
Iodo haloform through detecting, when the organic compound contained in natural water body is HA, in purified water body
Content be 115.5nmol/L；Three halogen of iodo when the organic compound contained in natural water body is FA, in purified water body
The content of methane is 198.3nmol/L.
Comparative example 4
Preparing natural water body solution, wherein the Br containing 10 μm of ol/L concentration-, 5 μm of ol/L concentration I-, 5mg/L concentration
The phosphate buffer that humic acid (HA) or fulvic acid (FA) and 1mmol/L pH value are 7.5.
The O for being 99.999% with purity2For ozone occurring source, ozone generator is accessed, aeration is obtained to being saturated into pure water
The ozone solution for being 20 μm of ol/L to concentration.
The natural water body solution and the ozone solution are mixed, under conditions of being protected from light, stirring (400rpm), 25 DEG C
30min is reacted, pretreated water body is obtained.
Chloramines disinfection agent NH is added into pretreated water body2Cl adds concentration after no head space sealing reaction for 24 hours
It terminates and reacts for 6.5mg/L hypo solution, the water body after being purified.
Iodo haloform through detecting, when the organic compound contained in natural water body is HA, in purified water body
Content be 402.2nmol/L；Three halogen of iodo when the organic compound contained in natural water body is FA, in purified water body
The content of methane is 280.3nmol/L.
The experimental results showed that using the processing method provided by the present invention, obtained three halogen of iodo in purified water body
The content of methane is no more than 75nmol/L.Specifically, when the organic compound contained in natural water body is HA, purified water body
In iodo haloform content be no more than 75nmol/L；When the organic compound contained in natural water body is FA, after purification
Water body in iodo haloform content be no more than 40nmol/L.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. the processing method of iodo haloform in a kind of water body, which comprises the following steps:
A) staying water is mixed with ozone solution, under conditions of being protected from light, stirring, 15~25 DEG C of 20~30min of reaction are obtained
To pretreated water body；
The initial molar concentration ratio of the initial molar concentration of iodide ion and ozone in ozone solution is 1:1 in the staying water
~16；
B the pretreated water body) is subjected to chlorination processing or chlorination amine is handled, the water body after being purified.
2. the processing method of iodo haloform in water body according to claim 1, which is characterized in that the pending water
Body includes iodide ion, bromide ion and organic compound.
3. the processing method of iodo haloform in water body according to claim 2, which is characterized in that the organic compound
Object includes humic acid and/or fulvic acid.
4. the processing method of iodo haloform in water body according to claim 2, which is characterized in that the pending water
In body, the molar concentration of iodide ion is 3~8 μm of ol/L, and the molar concentration of bromide ion is 8~12 μm of ol/L, organic compound
Concentration is 3~8mg/L.
5. the processing method of iodo haloform in water body according to claim 2, which is characterized in that the pending water
Body further includes phosphate buffer；
The pH value of the phosphate buffer is 7.2~7.8；
In the staying water, the molar concentration of phosphate buffer is 0.5~1.5mmol/L.
6. the processing method of iodo haloform in water body according to claim 1, which is characterized in that the speed of the stirring
Degree is 350~450rpm.
7. the processing method of iodo haloform in water body according to claim 1, which is characterized in that the chlorination processing
Or the processing of chlorination amine includes:
Chlorine-containing disinfectant or chloramines disinfection agent are added into pretreated water body to add thio after 24~26h is reacted in sealing
Metabisulfite solution terminates reaction.
8. the processing method of iodo haloform in water body according to claim 7, which is characterized in that the chlorine-containing disinfecting
Agent includes one or more of HClO, NaClO and KClO；
After chlorine-containing disinfectant is added into pretreated water body, the concentration of chlorine-containing disinfectant is 3~8mg/ in obtained water body
L；
The chloramines disinfection agent includes NH2Cl、NHCl2And NHCl3One or more of；
After chloramines disinfection agent is added into pretreated water body, the concentration of chloramines disinfection agent is 3~8mg/ in obtained water body
L。
9. the processing method of iodo haloform in water body according to claim 7, which is characterized in that the thiosulfuric acid
The concentration of sodium solution is 6~7mg/L.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967384A (en) * | 2016-05-24 | 2016-09-28 | 同济大学 | Method for controlling generation of iodo-trihalomethanes in drinking water |
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2019
- 2019-08-09 CN CN201910733276.3A patent/CN110436667A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967384A (en) * | 2016-05-24 | 2016-09-28 | 同济大学 | Method for controlling generation of iodo-trihalomethanes in drinking water |
Non-Patent Citations (1)
| Title |
|---|
| YVES BICHSEL等: "Oxidation of Iodide and Hypoiodous Acid in the Disinfection of Natural Waters", 《ENVIRONMENTAL SCIENCE AND TECHNOLOGY》 * |
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Application publication date: 20191112 |