CN102701425A - Method for inhibiting bromate generation in ozone oxidation process - Google Patents
Method for inhibiting bromate generation in ozone oxidation process Download PDFInfo
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- CN102701425A CN102701425A CN2012101509128A CN201210150912A CN102701425A CN 102701425 A CN102701425 A CN 102701425A CN 2012101509128 A CN2012101509128 A CN 2012101509128A CN 201210150912 A CN201210150912 A CN 201210150912A CN 102701425 A CN102701425 A CN 102701425A
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- bromate
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- oxidation process
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- ozone oxidation
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Abstract
The invention discloses a method for inhibiting bromate generation in the ozone oxidation process. Hydroxylamine is added into a water body of a predecessor containing ozone and bromated to perform stirring and reaction, the bromate generation in the ozone oxidation process is inhibited through the hydroxylamine, and the mole ratio of the ozone to an inhibitor hydroxylamine can be controlled in a range of 200-20:1. The method for inhibiting the bromate generation in the ozone oxidation process has remarkable effect of inhibiting the bromate generation, does not need a special device for an adding mode of the inhibitor hydroxylamine, is wide in application range and free of requirements for reaction temperature and the like, overcomes the shortcoming that the economical efficiency of a potential of hydrogen (pH) adjusting method in the prior art is poor and is simple and convenient to operate, economic and practical, and oxidizing capability and other problems of an oxidation system are reduced or solved while the bromate generating amount is reduced by means of a free-radical scavenger method.
Description
Technical field:
The present invention relates to the ozonization oxidation technology, particularly relate to a kind of method that bromate generates in ozonization or the oxidising process that suppresses.
Background technology:
Ozone is as a kind of strong oxidizer; Its standard oxidationreduction potential is 2.07V under acidic conditions, and alkaline condition for 1.27V, has high strong oxidizing property down; Can be used in the aspect such as sterilization and oxidation of organic compounds of water treatment system, sterilizing ability is the hundred times of chlorine.1893, Holland began with ozone the river disinfection; France in 1905 are applied to ozone the sterilization of tap water the earliest.After this, ozone is used as the elementary sterilizing agent of water factory gradually.Ozone except that being applied to sterilization process, nearly twenty or thirty over year the research of ozone aspect oxidation of organic compounds also obtained paying attention to widely.It is generally acknowledged that ozone reacts through two kinds of approach with organism in water: the one, O
3Molecule and organism directly react; The 2nd, O
3Chain type is decomposed the strong oxidizing property hydroxyl radical free radical (OH) and organism generation indirect reaction that the back produces.In recent years; The limitation that occurs and have now common process along with the detection of various hardly degraded organic substances; People are carrying out extensive studies and application again to ozone aspect the water treatment applications, concurrently put on display the water sterilization New Process for Treatment that many ozone combine with other unit for treating water.
But in the sterilization and oxidising process of ozone, the by product bromate appear at the application that has restricted ozone to a certain extent.Bromate is identified as the potential carcinogen of 2B level in the world, and national drinking water standard is 10 μ g/L.Therefore, in the process of ozone to the water disinfection, the generation that how to suppress to reduce bromate just seems very important.
The method that suppresses about bromate at present mainly contains the pH value method that in oxidising process, adds ammonia process, reduce solution, adds free-radical scavengers method such as acetate, adds HOBr scavenging agent method such as oxalic acid etc.There is certain limitation separately in these methods, like a large amount of ammonifications in oxidation system, though suppressed the growing amount of bromate, may cause having toxic nitrogenous DBPs and produce; It is not too economical in the actual production practice to regulate the pH value; Though add the growing amount that free-radical scavengers can reduce bromate, also reduced the oxidation capacity of oxidation system; Add the method for HOBr scavenging agent, in practical application, be difficult to realize.
How suppressing by product bromate in ozonization and the oxidation of organic compounds process, is a problem that is difficult to overcome during present ozone is used.
Summary of the invention:
, water technology is easy to generate the problem of by product bromate in using to ozone; The invention discloses the method that bromate generates in a kind of new inhibition ozone oxidation process; To solve prior art, or suppress to have reduced when bromate generates the problems such as oxidation capacity of oxidation system suppressing that the bromate generative process exists or suppress bromate to generate uneconomically.
The method that bromate generates in the inhibition ozone oxidation process provided by the invention is in the water body that contains ozone and bromate precursor, to add azanol to carry out stirring reaction, suppresses the generation of bromate in the ozone oxidation process through azanol.
The contriver finds in exploring the research of carrying out bromate generation in the water sterilization processing inhibition ozone oxidation process with ozone; For the water body that contains ozone and bromate precursor; In water body, add the suppressor factor azanol, through the oxidizing reaction of azanol participation ozone, the inhibited reaction temperature is more than freezing point temperature; Though azanol adds what; Bromate in the ozone oxidation process generated all has the obvious suppression effect, and along with the increase of azanol add-on, and it is more obvious to suppress the effect that bromate generates.But the azanol add-on is excessive, and the cost that water sterilization is handled can increase greatly.Consider that bromate generates the cost that suppresses effect and water sterilization processing, the mol ratio of ozone and suppressor factor azanol should be controlled at the scope of 200 ~ 20:1, and the scope of preferred ozone and suppressor factor azanol mol ratio is 100 ~ 25:1.
The method that bromate generates in the inhibition ozone oxidation process provided by the invention; The suppressor factor that adopts azanol to generate in a creative way as bromate in the ozone oxidation process, in the ozonization water treatment procedure, it is remarkable that bromate generates the inhibition effect; And do not reduce the oxidation capacity of oxidation system; Suppressor factor azanol dosing method does not require special devices, reactionless temperature special demands, and the scope of application is extensive; It is poor to have overcome prior art adjusting pH value method economy, and the free-radical scavengers method has reduced the problems such as oxidation capacity of oxidation system when reducing the bromate growing amount.The invention solves and suppress the difficult problem that the by product bromate generates in ozonization and the oxidation of organic compounds process, is the method that bromate generates in a kind of easy and simple to handle, economical and practical inhibition ozone oxidation process, can be widely used in the water sterilization processing.
Embodiment:
Below through embodiment the present invention is made further specific descriptions.It is important to point out; Following embodiment only is used for the present invention is done further explanation; Can not be interpreted as restriction to protection domain of the present invention; Affiliated art skilled is made some nonessential improvement and adjustment according to the foregoing invention content to the present invention, should still belong to protection scope of the present invention.
Embodiment 1
20 ± 2 ℃ of water temperature conditions, water pH value are 6, ozone concn 5mg/L, and water yield 200ml, bromate precursor (KBr) concentration is 250 μ g/L, the concentration of suppressor factor azanol is 87.5 μ g/L, evenly stirring reaction time 30min.Behind the reaction 30min, measure the content of bromate in the water body ozone oxidation system, the growing amount 7.041 μ g/L the when growing amount of bromate never adds the suppressor factor azanol reduce to 2.071 μ g/L, and inhibiting rate has improved more than 3 times.
Embodiment 2
10 ± 2 ℃ of water temperature conditions, water pH value are 7, ozone concn 10mg/L, water yield 300ml, bromate precursor (Br
-) concentration is 1mg/L, the concentration of suppressor factor azanol is 0.13mg/L, evenly stirring reaction time 50min.Behind the reaction 50min, measure the content of bromate in the water body ozone oxidation system, the growing amount 336.89 μ g/L the when growing amount of bromate never adds the suppressor factor azanol reduce to 267.09 μ g/L, and inhibiting rate has improved nearly more than 1.3 times.
Embodiment 3
30 ± 2 ℃ of water temperature conditions, water pH value are 7, ozone concn 10mg/L, water yield 300ml, bromate precursor (Br
-) concentration is 1mg/L, the concentration of suppressor factor azanol is 0.26mg/L, evenly stirring reaction time 50min.Behind the reaction 50min, measure the content of bromate in the water body ozone oxidation system, the growing amount 336.89 μ g/L the when growing amount of bromate never adds the suppressor factor azanol reduce to 260.57 μ g/L, and inhibiting rate has improved nearly more than 1.3 times.
Embodiment 4
40 ± 2 ℃ of water temperature conditions, water pH value are 7.5, ozone concn 10mg/L, water yield 300ml, bromate precursor (Br
-) concentration is 1mg/L, the concentration of suppressor factor azanol is 0.39mg/L, evenly stirring reaction time 40min.Behind the reaction 40min, measure the content of bromate in the water body ozone oxidation system, the growing amount 336.89 μ g/L the when growing amount of bromate never adds the suppressor factor azanol reduce to 160.69 μ g/L, and inhibiting rate has improved nearly more than 2 times.
Claims (3)
1. one kind is suppressed the method that bromate generates in the ozone oxidation process, it is characterized in that in the water body that contains ozone and bromate precursor, adding azanol carries out stirring reaction.
2. the method that bromate generates in the inhibition ozone oxidation process according to claim 1, the molar ratio that it is characterized in that ozone and azanol is 200 ~ 20:1.
3. the method that bromate generates in the inhibition ozone oxidation process according to claim 2, the molar ratio that it is characterized in that ozone and azanol is 100 ~ 25:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210150912.8A CN102701425B (en) | 2012-05-16 | 2012-05-16 | Method for inhibiting bromate generation in ozone oxidation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210150912.8A CN102701425B (en) | 2012-05-16 | 2012-05-16 | Method for inhibiting bromate generation in ozone oxidation process |
Publications (2)
| Publication Number | Publication Date |
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| CN102701425A true CN102701425A (en) | 2012-10-03 |
| CN102701425B CN102701425B (en) | 2014-01-15 |
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| CN201210150912.8A Expired - Fee Related CN102701425B (en) | 2012-05-16 | 2012-05-16 | Method for inhibiting bromate generation in ozone oxidation process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080227680A1 (en) * | 2007-03-14 | 2008-09-18 | Food Safety Technology, Llc | Aqueous ozone solution for ozone cleaning system |
| CN101792205A (en) * | 2010-02-10 | 2010-08-04 | 哈尔滨工业大学 | Fenton and Fenton-like system fortifier and using method thereof |
| CN101830569A (en) * | 2010-05-11 | 2010-09-15 | 沈阳建筑大学 | Method for quickly starting oxygen-poor ammonia oxidizing biofilter |
| CN102105406A (en) * | 2008-07-24 | 2011-06-22 | 三星重工业(株) | Apparatus and method for treating ballast water |
| CN102145932A (en) * | 2011-05-19 | 2011-08-10 | 哈尔滨工业大学 | Water treatment method for catalyzing ozone by using persulfate |
-
2012
- 2012-05-16 CN CN201210150912.8A patent/CN102701425B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080227680A1 (en) * | 2007-03-14 | 2008-09-18 | Food Safety Technology, Llc | Aqueous ozone solution for ozone cleaning system |
| CN102105406A (en) * | 2008-07-24 | 2011-06-22 | 三星重工业(株) | Apparatus and method for treating ballast water |
| CN101792205A (en) * | 2010-02-10 | 2010-08-04 | 哈尔滨工业大学 | Fenton and Fenton-like system fortifier and using method thereof |
| CN101830569A (en) * | 2010-05-11 | 2010-09-15 | 沈阳建筑大学 | Method for quickly starting oxygen-poor ammonia oxidizing biofilter |
| CN102145932A (en) * | 2011-05-19 | 2011-08-10 | 哈尔滨工业大学 | Water treatment method for catalyzing ozone by using persulfate |
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| CN102701425B (en) | 2014-01-15 |
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