CN101186372A - Method for removing nitrobenzene from drinking water - Google Patents
Method for removing nitrobenzene from drinking water Download PDFInfo
- Publication number
- CN101186372A CN101186372A CNA2007101916481A CN200710191648A CN101186372A CN 101186372 A CN101186372 A CN 101186372A CN A2007101916481 A CNA2007101916481 A CN A2007101916481A CN 200710191648 A CN200710191648 A CN 200710191648A CN 101186372 A CN101186372 A CN 101186372A
- Authority
- CN
- China
- Prior art keywords
- water
- mirbane
- oil
- activated carbon
- tap water
- 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.)
- Granted
Links
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 27
- 235000020188 drinking water Nutrition 0.000 title abstract description 4
- 239000003651 drinking water Substances 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000008399 tap water Substances 0.000 claims abstract description 31
- 235000020679 tap water Nutrition 0.000 claims abstract description 31
- 238000003795 desorption Methods 0.000 claims abstract description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 33
- 238000009413 insulation Methods 0.000 claims description 18
- 238000001179 sorption measurement Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 238000002203 pretreatment Methods 0.000 claims description 6
- 230000000274 adsorptive effect Effects 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 25
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 2
- 239000002594 sorbent Substances 0.000 description 9
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 5
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 208000007502 anemia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 208000019423 liver disease Diseases 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a method used for removing the nitrobenzol in drinking water, the technique of which is that: pretreatment: tap water or source water goes through filtering for removing the suspended materials in the water; small quantity of nitrobenzol in the tap water or the source water is absorbed: under the condition that temperature is 0 to 45 DEG C and flow velocity is 20 to 300BV/h, the small quantity of nitrobenzol in the tap water or the source water is absorbed on activated carbon fibers and gets out of water when the water flow though an adsorbing column that is filled with activated carbon fibers; thermal desorption: air flows at a speed of 1 to 20BV/min during the thermal desorption, room temperature is raised to 105 DEG C at a speed of 0.5 to 10 DEG C/min, and the temperature is kept for 10 to 150 mins and then raised to 180 to 450 DEG C at the speed of 0.5 to 10 DEG C/min, then the temperature is kept for 10 to 150mins and cooled to the room temperature. The remarkable characteristics is that the nitrobenzol removal rate of the drinking water containing nitrobenzol after the treatment of the invention is close to 100 percent; the thermal desorption is employed to realize the reproduction of activated carbon fibers for the absorption of next lot.
Description
Technical field
The present invention relates to the drinking water deep purification field, particularly adopt gac class sorbent material purifying method.
Background technology
Organic compound is on the rise to the pollution of water body in recent years, in more than the 2200 kind of organism of having monitored out in the present various water bodys, has 117 kinds of quilts to assert or is suspect to be carcinogens.Though toxic organic pollutant great majority content in water is very little, and is very big to the mankind's harm.Oil of mirbane is a kind of important Organic Chemicals, is used for producing aniline, aniline dyestuff, explosive, sterilant and medicine.The industrial oil of mirbane of also using in producing paint and lustering agents such as footwear, floor is as solvent.Because being extensive use of of oil of mirbane, in Song Hua River of China, the Yellow River, Huaihe River, the Changjiang river etc. all detect oil of mirbane.Oil of mirbane is a kind of deleterious, doubtful carcinogenic compound, can cause mentally deranged, anaemia, hepatopathy and the cancer of humans and animals.Obviously, for people's health, the pollution of oil of mirbane in water body is the problem that can not ignore.
For the removal of trace nitrobenzene in the tap water, study less at present.Environmental science, 2002,23 (5): the article " O among the 67-71
3/ H
2O
2Oxidizing process is removed the research of oil of mirbane in the water " author Ma Jun, Shi Fenghua and environmental science, 2005,26 (2): disclosed employing O in the article among the 78-82 " (the hydrous iron oxide catalysis ozone decomposes and the mechanism discussion of oxidation trace oil of mirbane in the water " author Ma Jun, Zhang Tao, Chen Zhonglin, Sui Minghao, the Li Xueyan
3/ H
2O
2Oxidation, hydrous iron oxide catalysis ozone decompose the method for removing oil of mirbane in the tap water, but the oxidation technology existence needs to consume oxygenant, operation more complicated, may oxidation thoroughly not form problems such as deleterious intermediate product.
In existing these methods, the technical process of absorption method and operation are simpler, remove efficient also than higher.Sorbing material commonly used has gac, silica gel, activated alumina etc.China's water supply and drainage, 2006,22 (13): the article among the 1-5 " studied by the emergency handling process of nitrobenzene contamination Song Hua River Yuan Shui " author Chen Zhonglin, Ma Jun etc. have disclosed employing Powdered Activated Carbon absorbing synergic permanganate composite chemical (PPC) and have strengthened compound ferro-aluminum (PAF) coagulation process removal trace nitrobenzene.But owing to adopt Powdered Activated Carbon, follow-up processing with separate cumbersomely, make the treatment process more complicated, and Powdered Activated Carbon often when lower concentration adsorptive power reduce greatly.
Summary of the invention
It is slow and be not easy shortcoming such as desorption to the present invention is directed to existing Powdered Activated Carbon complex treatment process, Powdered Activated Carbon rate of adsorption, proposes a kind of absorption, desorption rate is fast, the method for oil of mirbane in the high removal tap water of oil of mirbane clearance.
Technical scheme of the present invention is: a kind of method of removing oil of mirbane in the tap water comprises the steps:
A) pre-treatment: filter the suspended substance of removing in the water;
B) trace nitrobenzene in the planar water: being 0～45 ℃ in temperature is under 20～300 BV/h conditions with flow velocity, will be through pretreated current through being filled with the adsorption column of activated carbon fiber, be purified tap water, wherein BV represents carbon fiber adsorption and catalytic combustion packed bed volume;
C) thermal desorption: during thermal desorption,, rise to 105 ℃, insulation 10～150min by room temperature with the heat-up rate of 0.5～10 ℃/min earlier with the speed blowing air of 1～20BV/min; Rise to 180～450 ℃ with 0.5～10 ℃/min heat-up rate again, insulation 10～150min is chilled to room temperature.
The method of oil of mirbane in the described removal tap water, the wherein pre-treatment described in the steps A adopts the polypropylene cotton to filter the suspended substance of removing in the water.Activated carbon fiber is 2000～30000 μ g oil of mirbane/g to the adsorptive capacity of trace nitrobenzene in the water among the step B.The temperature of water is 5～35 ℃ among the step B, and flow velocity is 40～180BV/h.The described blowing air tolerance of step C is 2～15BV/min, earlier rises to 105 ℃, insulation 15～120min by room temperature with the heat-up rate of 1～8 ℃/min; Heat-up rate with 1～8 ℃/min rises to 200～400 ℃ again, insulation 15～120min.The model of used activated carbon fiber is selected among ST-800, ST-1000, ST-1300, ST-1500, A10 or the A12 any for use.
Beneficial effect of the present invention is: 1. easy and simple to handle, because employing is activated carbon fiber, subsequent disposal is simple, does not need to resemble Powdered Activated Carbon through the follow-up separation and the processing of breeze.
2. the clearance of trace nitrobenzene is near 100%, owing to used activated carbon fiber as sorbent material, and activated carbon fiber has flourishing microvoid structure and huge specific surface area, has good absorption property, particularly the adsorptive power to lower concentration is good especially, even the trace level adsorbate is still kept very high adsorption rate, the adsorption rate of oil of mirbane can reach more than 99% in the water that process method of the present invention is handled.
3. behind thermal desorption, the renewable use of sorbent material.
4. reduce the consumption of sorbent material and the volume of adsorption tower.The present invention since the activated carbon fiber that adopts as sorbent material; the loading capacity of activated carbon fiber is bigger than granulated active carbon; and the absorption of activated carbon fiber and desorption rate fast several times to tens times than granulated active carbon; so also just reaching same effect, handling under the situation of identical many water yields; use the present invention can reduce the consumption of sorbent material greatly, has reduced the volume of adsorption tower.
Embodiment
The sorbent material that the present invention adopts is that model that Jiangsu Sutong Carbon Fiber Co., Ltd produces is that the model that the active carbon fibre peacekeeping Shenyang City bright space treating plant company limited of ST-800, ST-1000, ST-1300, ST-1500 produces is the activated carbon fiber of A10, A12.
Embodiment 1:
After earlier filtering out suspended substance by the polypropylene cotton, the tap water that will contain 500 μ g/L oil of mirbane obtains limpid tap water.Is the 2.0g model that the activated carbon fiber of ST-800 is packed into that ( 15 * 90mm), and the activated carbon fiber admission space is 12.5cm in the adsorption column
3The tap water that will contain 500 μ g/L oil of mirbane at room temperature flows through activated carbon fiber with the 1L/h flow velocity and fills bed, and the tap water treatment capacity is 89L, and the concentration of water outlet oil of mirbane is 1.5 μ g/L, and the clearance of oil of mirbane is 99.7%.During thermal desorption,, rise to 105 ℃, insulation 30min in room temperature with the heat-up rate of 3 ℃/min earlier with the speed blowing air of 50mL/min; Heat-up rate with 3 ℃/min rises to 300 ℃ again, and insulation 30min is chilled to room temperature, and the desorption rate of activated carbon fiber is 99.8%.
Embodiment 2:
Changing the activated carbon of sorbent fiber among the embodiment 1 into model is ST-1000, ST-1300, ST-1500, A10 and A12, and other processing modes are with embodiment 1.Its result is except every batch of tap water treatment capacity changes to some extent, and other remain unchanged substantially as adsorption effect, desorption rate.
Embodiment 3:
The concentration of oil of mirbane in the tap water among the embodiment 1 is become 100 μ g/L, and other processing mode is with embodiment 1, and the treatment capacity of tap water increases greatly, reaches 280 L, and the water outlet nitro phenenyl concentration is 0.7 μ g/L, and the clearance of oil of mirbane is 99.3%; Desorption rate remains unchanged substantially.
Embodiment 4:
The tap water that will contain 500 μ g/L oil of mirbane is earlier by obtaining limpid tap water after the cotton filtration of polypropylene.Is the 108g model that the activated carbon fiber of ST-800 is packed into that ( 55 * 330mm), and the activated carbon fiber admission space is 675cm in the adsorption column
3The tap water that will contain 500 μ g/L oil of mirbane at room temperature flows through activated carbon fiber with the 54L/h flow velocity and fills bed, and the tap water treatment capacity is 4806L, and the water outlet nitro phenenyl concentration is 2.0 μ g/L, and the clearance of oil of mirbane is 99.6%.During thermal desorption,, rise to 105 ℃, insulation 30min by room temperature with the heat-up rate of 3 ℃/min earlier with the speed blowing air of 2700mL/min; Heat-up rate with 3 ℃/min rises to 300 ℃ again, and insulation 30min is chilled to room temperature, and the desorption efficient of activated carbon fiber is 99.7%.
Embodiment 5:
The source water that will contain 500 μ g/L oil of mirbane is earlier by obtaining clear water source water after the cotton filtration of polypropylene.Is the 2.0g model that the activated carbon fiber of ST-800 is packed into that ( 15 * 75mm), and the activated carbon fiber admission space is 12.5cm in the adsorption column
3The source water that will contain 500 μ g/L oil of mirbane at room temperature flows through activated carbon fiber with the 1L/h flow velocity and fills bed, and the source water treatment capacity is 75L, and the water outlet nitro phenenyl concentration is 2.5 μ g/L, and the clearance of oil of mirbane is 99.5%.During thermal desorption,, rise to 105 ℃, insulation 30min in room temperature with the heat-up rate of 3 ℃/min earlier with the speed blowing air of 50mL/min; Heat-up rate with 3 ℃/min rises to 300 ℃ again, and insulation 30min is chilled to room temperature, and the desorption rate of activated carbon fiber is 99.6%.
Embodiment 6:
Changing the activated carbon of sorbent fiber among the embodiment 5 into model is ST-1000, ST-1300, A10 and A12, and other processing modes are with embodiment 5.Its result is except every batch of source water treatment capacity changes to some extent, and other remain unchanged substantially as adsorption effect, desorption rate.
Embodiment 7:
The concentration of oil of mirbane in the source water among the embodiment 5 is become 100 μ g/L, and other processing mode is with embodiment 5, and the water source water yield of processing reaches 232L, and the water outlet nitro phenenyl concentration is 0.9 μ g/L, and the clearance of oil of mirbane is 99.1%; Desorption rate remains unchanged substantially.
Embodiment 8:
The source water that will contain 500 μ g/L oil of mirbane is earlier by obtaining clear water source water after the cotton filtration of polypropylene.Is the 108g model that the activated carbon fiber of ST-800 is packed into that ( 55 * 330mm), and the activated carbon fiber admission space is 675cm in the adsorption column
3The source water that will contain 500 μ g/L oil of mirbane at room temperature flows through activated carbon fiber with the 54L/h flow velocity and fills bed, and the source water treatment capacity is 4050L, and the water outlet nitro phenenyl concentration is 2.7 μ g/L, and the clearance of oil of mirbane is 99.46%.During thermal desorption,, rise to 105 ℃, insulation 30min by room temperature with the heat-up rate of 3 ℃/min earlier with the speed blowing air of 2700mL/min; Heat-up rate with 3 ℃/min rises to 300 ℃ again, and insulation 30min is chilled to room temperature, and the desorption efficient of activated carbon fiber is 99.5%.
Embodiment 9
A kind of method of removing oil of mirbane in the tap water comprises the steps:
A) pre-treatment: adopt the polypropylene cotton to filter the suspended substance of removing in the water;
B) trace nitrobenzene in the planar water: being 0～45 ℃ in temperature is under the condition of 20～300BV/h with flow velocity, will be purified tap water through pretreated current through being filled with the adsorption column of activated carbon fiber; Wherein temperature can be the arbitrary temperature in 0～45 ℃, such as 0 ℃, 6 ℃, 15 ℃, 23 ℃, 35 ℃, 45 ℃ etc., flow velocity can be 20BV/h, 42BV/h, 78BV/h, 97BV/h, 132BV/h, 178BV/h, 268BV/h, 277BV/h, 300BV/h etc.
C) thermal desorption: during thermal desorption,, rise to 105 ℃, insulation 10～150min by room temperature with the heat-up rate of 0.5～10 ℃/min earlier with the speed blowing air of 1～20BV/min; Rise to 180～450 ℃ with 0.5～10 ℃/min heat-up rate again, insulation 10～150min is chilled to room temperature.Wherein the flow velocity of air can be 1BV/min, 2BV/min, 8BV/min, 13BV/min, 15BV/min, 20BV/min etc.Being warming up to 105 ℃ heat-up rate by room temperature can be 0.5 ℃/min, 1 ℃/min, 4.5 ℃/min, 8 ℃/min, 10 ℃/min etc.Soaking time can be 10min, 20min, 45min, 60min, 90min, 150min.Can be warmed up to 180 ℃, 200 ℃, 360 ℃, 400 ℃, 450 ℃ equitemperatures with 0.5 ℃/min, 3 ℃/min, 4.5 ℃/min, 6 ℃/min, the speed of 10 ℃/min then, soaking time can be 10min, 20min, 40min, 80min, 120min, 150min.
The method of oil of mirbane, the wherein pre-treatment described in the steps A in the described removal tap water.Activated carbon fiber is 2000～30000 μ g oil of mirbane/g to the adsorptive capacity of trace nitrobenzene in the water among the step B.The model of used activated carbon fiber is selected among ST-800, ST-1000, ST-1300, ST-1500, A10 or the A12 any for use.
Claims (6)
1. a method of removing oil of mirbane in the tap water is characterized in that comprising the steps:
A) pre-treatment: filter the suspended substance of removing in the water;
B) trace nitrobenzene in the planar water: being 0～45 ℃ in temperature is under the condition of 20～300BV/h with flow velocity, will be purified tap water through pretreated current through being filled with the adsorption column of activated carbon fiber;
C) thermal desorption: during thermal desorption,, rise to 105 ℃, insulation 10～150min by room temperature with the heat-up rate of 0.5～10 ℃/min earlier with the speed blowing air of 1～20BV/min; Rise to 180～450 ℃ with 0.5～10 ℃/min heat-up rate again, insulation 10～150min is chilled to room temperature.
2. the method for oil of mirbane is characterized in that the pre-treatment described in the steps A in the removal tap water according to claim 1, adopts the polypropylene cotton to filter the suspended substance of removing in the water.
3. the method for oil of mirbane in the removal tap water according to claim 1 is characterized in that activated carbon fiber among the step B is 2000～30000 μ g oil of mirbane/g to the adsorptive capacity of trace nitrobenzene in the water.
4. the method for oil of mirbane in the removal tap water according to claim 1, the temperature that it is characterized in that water among the step B is 5～35 ℃, flow velocity is 40～180BV/h.
5. the method for oil of mirbane in the removal tap water according to claim 1 is characterized in that the described blowing air tolerance of step C is 2～15BV/min, earlier rises to 105 ℃, insulation 15～120min by room temperature with the heat-up rate of 1～8 ℃/min; Heat-up rate with 1～8 ℃/min rises to 200～400 ℃ again, insulation 15～120min.
6. the method for oil of mirbane in the removal tap water according to claim 1, the model that it is characterized in that used activated carbon fiber are selected among ST-800, ST-1000, ST-1300, ST-1500, A10 or the A12 any for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101916481A CN101186372B (en) | 2007-12-14 | 2007-12-14 | Method for removing nitrobenzene from drinking water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101916481A CN101186372B (en) | 2007-12-14 | 2007-12-14 | Method for removing nitrobenzene from drinking water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101186372A true CN101186372A (en) | 2008-05-28 |
| CN101186372B CN101186372B (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101916481A Expired - Fee Related CN101186372B (en) | 2007-12-14 | 2007-12-14 | Method for removing nitrobenzene from drinking water |
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| Country | Link |
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| CN (1) | CN101186372B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464373A (en) * | 2011-10-20 | 2012-05-23 | 常州亚环环保科技有限公司 | Method for removing benzopyrene from drinking water |
| CN101786737B (en) * | 2009-12-29 | 2012-08-22 | 南京信息工程大学 | Method for treating malachite green wastewater and recycling resources |
| CN104891700A (en) * | 2015-06-17 | 2015-09-09 | 齐齐哈尔医学院 | Temperature difference type circulating water purifier |
-
2007
- 2007-12-14 CN CN2007101916481A patent/CN101186372B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786737B (en) * | 2009-12-29 | 2012-08-22 | 南京信息工程大学 | Method for treating malachite green wastewater and recycling resources |
| CN102464373A (en) * | 2011-10-20 | 2012-05-23 | 常州亚环环保科技有限公司 | Method for removing benzopyrene from drinking water |
| CN104891700A (en) * | 2015-06-17 | 2015-09-09 | 齐齐哈尔医学院 | Temperature difference type circulating water purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101186372B (en) | 2011-04-27 |
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