CN108358298A - A method of it is generated using ozone control nitrosamines substance - Google Patents
A method of it is generated using ozone control nitrosamines substance Download PDFInfo
- Publication number
- CN108358298A CN108358298A CN201810029703.5A CN201810029703A CN108358298A CN 108358298 A CN108358298 A CN 108358298A CN 201810029703 A CN201810029703 A CN 201810029703A CN 108358298 A CN108358298 A CN 108358298A
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- Prior art keywords
- ozone
- substance
- water body
- generated
- nitrosamines
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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
- C02F1/50—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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
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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 invention discloses a kind of methods generated using ozone control nitrosamines substance, belong to water body ozone disinfecting technology field.Technical scheme of the present invention main points are：A method of it is generated using ozone control nitrosamines substance, detailed process is：Take natural water body to be clean, it adds ozone and controls a concentration of≤0.5mg/L or >=4.3mg/L of ozone in natural water body, reaction time control is the Disinfection Effect for reaching natural water body for≤30s or >=15min, during this ozone oxidation two level aminated compounds generate nitrosamines substance amount it is relatively low.The present invention can not only optimize the control condition that specific pollutants are generated in ozonization, and have many advantages, such as that easy to operate, processing cost is cheap, do not add any other chemical substance and reduces secondary pollution caused by chemical treatment.
Description
Technical field
The invention belongs to water body ozone disinfecting technology fields, and in particular to a kind of to be given birth to using ozone control nitrosamines substance
At method.
Background technology
Drinking Water in China disinfection once generally uses disinfection by chlorine, but due to generating a large amount of halogenated disinfection by-products and
Gradually replaced by other disinfectants, is more and more aoxidized and disinfected using ozone during drinking water treatment.
Ozone can not only remove the pathogenic microorganism in drinking water, and there is significant removal to imitate poisonous and harmful substance difficult to degrade
Fruit, but more highly toxic nitrosamines substance is also produced simultaneously.Although the concentration level of substance of this kind is relatively low（Ng/L grades）, but
Since it is with strong carcinogenicity, studies the preceding extract being primarily present in water source and generate corresponding nitrosamine under ozone oxidation
Rule is current major issue.
In drinking water producing procedure, generally preoxidation technique is used to reduce the load of subsequent processing units both at home and abroad, led
Nitrosamines substance is caused to generate in advance.In terms of current status quo, oxidation technology such as ozonization may bring two
Secondary pollution, thus by it is formed rule carry out in-depth study, purposefully select effective ways reduce its generation can
Energy property is completely removed, and is the effective way for reducing nitrosamine and endangering drinking water.
Invention content
The technical problem to be solved by the present invention is to provide a kind of processes simple, of low cost and economical and practical to utilize ozone
Control the method that nitrosamines substance generates.
The present invention adopts the following technical scheme that solve above-mentioned technical problem, a kind of to control nitrosamines substance using ozone
The method of generation, it is characterised in that detailed process is：Natural water body to be clean is taken, ozone is added and controls ozone in natural water body
A concentration of≤0.5mg/L or >=4.3mg/L, reaction time control is the disinfection for reaching natural water body for≤30s or >=15min
Effect, amount of ozone oxidation two level aminated compounds generation nitrosamines substance is relatively low during this.
Further preferably, the two level amine substance is DMA, MEA, DEA, Mor or/and Pyr, and corresponding catabolite is
NDMA, NMEA, NDEA, NMor or/and Npyr.
Further preferably, the pH of the natural water body is preferably≤4 or >=10.
Further preferably, the reaction temperature of reaction process is preferably≤5 DEG C or >=35 DEG C.
Further preferably, by adding the Na that mass concentration is 25g/L in reaction process2S2O3It is anti-as terminator control
It should terminate.
The present invention has the advantages that compared with prior art：
1, ozonization condition of the invention can not only be used as removal nitrosodimethylamine（NDMA）Technical conditions, can be with
The generation for controlling other four kinds of nitrosamines substances, to achieve the purpose that secondary pollution in reduction and control ozone disinfection process；
2, the present invention has obtained the rule and production quantity maximum that natural organic matter generates nitrosamines substance under the conditions of ozone
When condition, for avoided in drinking water ozone disinfection process nitrosamines substance generation foundation is provided；
3, the present invention makes full use of the oxidation of ozonization and the convenience of disinfection, improves natural water body quality；
4, the present invention does not add other chemical substances while optimizing ozonization treatment effect, without secondary input, warp
Ji is practical.
Description of the drawings
Fig. 1 is that five kinds of two level amine substances of embodiment nitrosamines substance production quantity after various concentration ozone treatment is bent
Line；
Fig. 2 is five kinds of two level amine substances of embodiment nitrosamines substance production quantity curve after different ozone treatment times；
Fig. 3 is nitrosamines substance production quantity curve under five kinds of two level amine substances of embodiment middle difference pH treated by ozone；
Fig. 4 is nitrosamines substance production quantity curve under five kinds of two level amine substances of embodiment rear different temperatures treated by ozone.
Specific implementation mode
The above of the present invention is described in further details by the following examples, but this should not be interpreted as to this
The range for inventing above-mentioned theme is only limitted to embodiment below, and all technologies realized based on the above of the present invention belong to this hair
Bright range.
Embodiment
（1）The present embodiment selects five kinds of secondary amines such as DMA, MEA, DEA, Mor and Pyr in amine substance, each two level
The dosage of amine is fixed as 1 μm of ol/L.
（2）500mL ultra-pure waters are taken, the average value 7.0 or so that phosphate buffer tune pH is natural water body is added, temperature is
25 DEG C, in the case where four ozone add concentration 0.5mg/L, 1.5mg/L, 2.5mg/L, 4.3mg/L, reaction 10min probes into nitrosamines
The Conduce Disciplinarian of substance, the production quantity for obtaining the nitrosamines substance when ozone concentration is 4.3mg/L and 0.5mg/L is all seldom,
But the production quantity of nitrosamines substance reaches maximum value when ozone concentration is 2.5mg/L；
（3）500mL ultra-pure waters are taken, the average value 7.0 or so that phosphate buffer tune pH is natural water body, temperature 25 is added
DEG C, in the case where ozone adds concentration 2.5mg/L reaction setting time gradient 30s, 1min, 3min, 5min, 7min, 10min and
15min measures the Conduce Disciplinarian of nitrosamine at any time, obtains the nitrosamines substance when ozone contact time is 30s and 15min
Production quantity it is minimum, the production quantity of nitrosamines substance is maximum when 10min.
（4）Take 500mL ultra-pure waters, be added phosphate buffer tune pH be respectively pH value of solution be 4.0,7.0,9.0,
10.0, temperature be 25 DEG C, ozone, which adds, reacts 10min under concentration 2.5mg/L, nitrosamines substance production quantity with the raising of pH and
It increases, the production quantity of nitrosamines substance is minimum when pH=4.0.
（5）500mL ultra-pure waters are taken, the average value 7.0 or so that phosphate buffer tune pH is natural water body, solution temperature is added
Degree be set as 5 DEG C, 25 DEG C, 35 DEG C of ozone add and react 10min under concentration 2.5mg/L, the generation of nitrosamines substance at 25 DEG C
Amount is maximum, and the production quantity of nitrosamines substance is minimum at 5 DEG C.
（6）The Na of 0.5mL is added after reaction2S2O3（25g/L）.
The result shows that after the ozone treatment of 4.3mg/L, secondary amine DMA, MEA, DEA, Mor and Pyr generation NDMA,
The amount of NMEA, NDEA, NMor and Npyr be respectively 41.9ng/L, 143.6ng/L, 41.9ng/L, 18.8ng/L, 9.4ng/L and
66.6ng/L；The production quantity of nitrosamine changes with time rule for first increases and then decreases, and most when the reaction time is 10min
Greatly；Natural water pH is about neutral, and temperature is generally below ambient temperature, therefore need to only control water temperature should not be biased to 25 DEG C i.e.
It can.Therefore, while ensureing other compound removal effects, according to ozone concentration and the time of contact of ozone and water body this two
The concentration of a control variable that can not consume great amount of cost, ozone answers >=4.3mg/L, the aeration duration of ozone to answer >=15min
It can be to avoid a large amount of generations of nitrosamines substance.
Embodiment above describes the basic principles and main features and advantage of the present invention, and the technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, under the range for not departing from the principle of the invention, various changes and improvements may be made to the invention, these changes and improvements are each fallen within
In the scope of protection of the invention.
Claims (5)
1. a kind of method generated using ozone control nitrosamines substance, it is characterised in that detailed process is：Take day to be clean
Right water body adds ozone and controls a concentration of≤0.5mg/L or >=4.3mg/L of ozone in natural water body, reaction time control
It is the Disinfection Effect for reaching natural water body for≤30s or >=15min, ozone oxidation two level aminated compounds generates sub- during this
The amount of nitramine substance is relatively low.
2. the method according to claim 1 generated using ozone control nitrosamines substance, it is characterised in that：Described two
Grade amine substance be DMA, MEA, DEA, Mor or/and Pyr, corresponding catabolite be NDMA, NMEA, NDEA, NMor or/and
Npyr。
3. the method according to claim 1 generated using ozone control nitrosamines substance, it is characterised in that：The day
The pH of right water body is preferably≤4 or >=10.
4. the method according to claim 1 generated using ozone control nitrosamines substance, it is characterised in that：It reacted
The reaction temperature of journey is preferably≤5 DEG C or >=35 DEG C.
5. the method according to claim 1 generated using ozone control nitrosamines substance, it is characterised in that：It reacted
By adding the Na that mass concentration is 25g/L in journey2S2O3Terminate as terminator control reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810029703.5A CN108358298A (en) | 2018-01-12 | 2018-01-12 | A method of it is generated using ozone control nitrosamines substance |
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| CN201810029703.5A CN108358298A (en) | 2018-01-12 | 2018-01-12 | A method of it is generated using ozone control nitrosamines substance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958157A (en) * | 2021-02-08 | 2021-06-15 | 华侨大学 | Bimetallic organic framework material catalyst, preparation method and application |
| CN113075374A (en) * | 2021-03-24 | 2021-07-06 | 天津大学 | Method for evaluating generation of byproduct NDMA in water disinfection process |
| CN114702975A (en) * | 2022-04-13 | 2022-07-05 | 河南师范大学 | Preparation method and application of two-step sulfur-doped sludge biochar |
-
2018
- 2018-01-12 CN CN201810029703.5A patent/CN108358298A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112958157A (en) * | 2021-02-08 | 2021-06-15 | 华侨大学 | Bimetallic organic framework material catalyst, preparation method and application |
| CN112958157B (en) * | 2021-02-08 | 2022-09-30 | 华侨大学 | Bimetallic organic framework material catalyst, preparation method and application |
| CN113075374A (en) * | 2021-03-24 | 2021-07-06 | 天津大学 | Method for evaluating generation of byproduct NDMA in water disinfection process |
| CN113075374B (en) * | 2021-03-24 | 2022-11-25 | 天津大学 | Method for evaluating generation of byproduct NDMA in water disinfection process |
| CN114702975A (en) * | 2022-04-13 | 2022-07-05 | 河南师范大学 | Preparation method and application of two-step sulfur-doped sludge biochar |
| CN114702975B (en) * | 2022-04-13 | 2023-10-17 | 河南师范大学 | Preparation method and application of two-step sulfur-doped sludge biochar |
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Application publication date: 20180803 |