CN108760392A - A kind of Passive sampler and the method for sampling for the acquisition of hydrophily organic pollution - Google Patents
A kind of Passive sampler and the method for sampling for the acquisition of hydrophily organic pollution Download PDFInfo
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- CN108760392A CN108760392A CN201810776257.4A CN201810776257A CN108760392A CN 108760392 A CN108760392 A CN 108760392A CN 201810776257 A CN201810776257 A CN 201810776257A CN 108760392 A CN108760392 A CN 108760392A
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- 238000005070 sampling Methods 0.000 title claims abstract description 36
- 230000010148 water-pollination Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000010935 stainless steel Substances 0.000 claims abstract description 17
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 8
- 231100000719 pollutant Toxicity 0.000 claims abstract description 8
- 210000003813 thumb Anatomy 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 28
- 239000002250 absorbent Substances 0.000 claims description 20
- 230000002745 absorbent Effects 0.000 claims description 20
- 238000010521 absorption reaction Methods 0.000 claims description 18
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000011259 mixed solution Substances 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 150000001768 cations Chemical group 0.000 claims description 11
- 239000003463 adsorbent Substances 0.000 claims description 9
- 239000000356 contaminant Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000003480 eluent Substances 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 6
- 239000012498 ultrapure water Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- CBHOOMGKXCMKIR-UHFFFAOYSA-N azane;methanol Chemical compound N.OC CBHOOMGKXCMKIR-UHFFFAOYSA-N 0.000 claims description 3
- 230000009514 concussion Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000003973 irrigation Methods 0.000 abstract description 4
- 230000002262 irrigation Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 238000011160 research Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000002470 solid-phase micro-extraction Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229920006393 polyether sulfone Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 208000031320 Teratogenesis Diseases 0.000 description 1
- PSDYQSWHANEKRV-UHFFFAOYSA-N [S]N Chemical compound [S]N PSDYQSWHANEKRV-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100000049 endocrine disruptor Toxicity 0.000 description 1
- 239000000598 endocrine disruptor Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000008376 long-term health Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 239000003993 organochlorine pesticide Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of Passive samplers and the method for sampling for the acquisition of hydrophily organic pollution, the sampler includes outer framework and sieve, the outer framework is the ring flange of ellipse, threaded hole there are four being opened up on the ring flange, thumb screw is installed, the thumb screw end is socketed with wing nut in the threaded hole；The sieve is stainless steel mesh, and in ring flange center, there are two the sieves, is respectively overlay in the inner surface of ring flange, and be placed with sorbing material among two sieves for setting.The sampler of the present invention has unique configuration design, it is made to be specially adapted for sewage conduct, underground water well, the passive sampling of agricultural irrigation irrigation canals and ditches and water quality monitoring and sampling；Using the design of assembling easy to disassemble, be conducive to be directed to different target pollutant, replace sorbing material, improves the accumulation ability of sampler, reduce interference, reduce cost；The interference of suspended matter, planktonic organism to sampling in water is can avoid, the degree of purification of sample is enhanced.
Description
Technical field
The invention belongs to environmental pollution acquisition technique fields, and in particular to a kind of to be used for what hydrophily organic pollution acquired
Passive sampler and the method for sampling for using the Passive sampler.
Background technology
Hydrophily organic pollution refers to a kind of organic matter for carrying polar group present in environment, has to water larger
Affinity, be easily soluble in water.Hydrophilic radical is usually carried on this kind of contaminant molecule, such as hydroxyl, carboxyl, amino, sulphur
Acidic group etc. easily and Hydrogenbond forms the physical property of of short duration bond by hydrogen bond and water.The water environment of people's extensive concern is dirty
Object is contaminated, hydrophily organic pollution, such as organo-chlorine pesticide class, antibiotics, Endocrine Disruptors are largely belonged to
Deng.These pollutants usually have apparent bio-toxicity, influence the existence and breeding of aquatile in water environment.Pass through
Food chain and drinking-water enter human body, can cause the long-term health effect such as carcinogenic, teratogenesis, mutagenesis.Therefore, this pollutant is always
It is the emphasis of environmental area research.
In to environment in the research of hydrophily organic pollution, sample collection is an important link.It continuously improves
Sampling technique and equipment, provide strong technology for the Exploration on mechanism of laboratory research and detection contaminant transportation conversion and protect
Barrier, promotes the sustainable development of Research of Environmental Sciences.
Traditional environmental water sample acquisition technique is generally divided into acquisition and two class of automatic collection manually.Manual acquisition technique
Sampling apparatus used mainly has two class of vertical type and horizontal type, with the water inertia material such as stainless steel, polytetrafluoroethylene (PTFE) or organic glass
Material is material, is made of sampling tank, two panels semicircle upper cover and movable floor.Automatic acquisition technology is used can be with the electronic of time switch
Pumping water sampling, sampling apparatus are made of electronic sampling pump, conduit, stainless steel probe and sample storage bottle.This two classes sampling technique, all
It is to belong to active sampling technique, needs sample collector on duty, automatic sampler also wants additional power source.This kind of technology is suitable for short-term
Instantaneous sampling monitors the long-term trend of water environment pollution, and since human cost consumption is big, this kind of active sampling technique is not
It is applicable in.
In recent years, with the increase of attention and improvement demand for water environment pollution, people increasingly pay close attention to water environment
The Secular Variation Tendency of quality condition.There is an urgent need to develop go out be suitable for long-term sampling monitoring demand, be not required to human attendance, be not required to
Power supply, low-cost novel sampling technology and device.Therefore, passive sampling technology is gradually developed.
Existing passive sampling apparatus includes mainly at present：Passive diffusion bag sampler (Passive Diffusion
Bag Samplers, PDBs), film diffusion balanced sample device (Diffusive Equilibrium in Thin Films
DET), solid phase microextraction sampling device (Solid-phase Microextraction, SPME), semi-permeable membrane passive sampling apparatus
(Semipermeable Membrane Devices, SPMD) etc., these passive sampling apparatus are suitable for the organic dirt of hydrophobicity more
The acquisition for contaminating object and volatile organic matter, is not suitable for hydrophily organic pollution in water environment.
Invention content
In view of the deficiencies of the prior art, being used for what hydrophily organic pollution acquired the purpose of the present invention is to provide a kind of
Passive sampler and the method for sampling, using hydrophily organic pollution dynamics diffusion and selective enrichment basic principle, with
Realize the passive acquisition to hydrophily organic pollution in water environment.
To achieve the above object, the technical solution adopted by the present invention is：It is a kind of to be used for what hydrophily organic pollution acquired
Passive sampler, including outer framework and sieve, the outer framework are the ring flange of ellipse, are made of stainless steel, institute
Threaded hole there are four being opened up on ring flange is stated, thumb screw is installed in the threaded hole, the thumb screw end is socketed with
Wing nut；The sieve is stainless steel mesh, and in ring flange center, there are two the sieves, is respectively overlay in flange for setting
The inner surface of disk, and it is placed with sorbing material among two sieves.
Further, four threaded holes are uniformly arranged along the length diameter both ends of ring flange.
Further, the long side outer diameter of the ring flange is 70mm, and internal diameter 33mm, short side outer diameter is 55mm, and internal diameter is
33mm, thickness 3mm.
Further, the sieve is circular configuration, and diameter is less than the outer diameter of ring flange and the internal diameter more than ring flange,
Specially diameter 45mm.
Further, the sieve is 300 mesh, 48 μm of aperture.
Further, the sorbing material is that MCX mixed type cations exchange reverse phase absorption agent, loading 1g.
Further, the adsorbent (3) is macroporous absorbent resin XAD-7.
Further, the macroporous absorbent resin XAD-7 is modified by methanol-water mixed solution, and specific modification procedure is such as
Under：
1) in constant temperature air bath oscillator, macroporous absorbent resin XAD-7 is taken, being immersed in methanol-water mixed solution makes
Macroporous absorbent resin XAD-7 resins come into full contact with methanol-water mixed solution；
2) after standing, siphon away supernatant liquid, refill the methanol-water mixed solution described in step 1), repeat more than
Modified macroporous absorbent resin XAD-7 is made in soaking process 3 times and 3 times or more；
3) modified macroporous absorbent resin XAD-7 made from step 2) is dried to constant weight.
Further, step 1) and 2) in, the mass ratio of macroporous absorbent resin XAD-7 and methanol-water mixed solution is 1：
5；The methanol-water mixed solution is by methanol and water by volume 1：1 is formulated；In step 1), concussion temperature is 25
Degree Celsius, frequency of oscillation is 100 revs/min；In step 2), time of repose is 5 minutes, and baking oven thermostat temperature is 50 degrees Celsius.
Using Passive sampler of the present invention, the present invention also proposes a kind of technical solution：One kind has for hydrophily
The method of sampling of machine pollutant acquisition, includes the following steps：
(1) weigh 1g MCX mixed type cations exchange reverse phase absorption agent, before use, successively use methanol, ultra-pure water,
The hydrochloric acid solution of pH=2 is activated, and the adsorbent after activation is placed between two stainless steel mesh；
(2) two stainless steel mesh are adhered to respectively on the inner wall of steel flange disk, recycle wing screw by method
Blue disk sealing screws on wing nut in the end of wing screw, forms Passive sampler；
(3) Passive sampler for fixing sealing, is positioned in city sewer well；
(4) Passive sampler is placed in sewer well 24 hours, makes the abundant adsorbed target pollutant of Passive sampler；
Terminate sampling after (5) 24 hours, Passive sampler is taken out, sampler is rinsed with ultra-pure water；
(6) it rinses after drying, ring flange is opened, take out the exchange reverse phase absorption agent of MCX mixed type cations and be placed in cleaning
Glass funnel in, to be adsorbed with target contaminant MCX mixed type cations exchange reverse phase absorption agent elute；
(7) technical conditions eluted：Glass funnel is placed on funnel stand, connects a clean beaker below.To glass
The methanol of 10mL chromatographically pures is slowly added in glass funnel, the speed control of addition about elutes 10 minutes in 1mL/min；It adds
The speed control of the methanolic ammonia solution of 6mL a concentration of 5%, addition about elutes 6 minutes in 1mL/min；
(8) liquid eluted twice is mixed, obtains eluent, experimental analysis is carried out to eluent.
Compared with prior art, the beneficial effects of the invention are as follows：
1, ring flange is designed as elliptical shape, and convenient to place and take out in sewage conduct, unique configuration design makes it
It is specially adapted for sewage conduct, underground water well, the passive sampling of agricultural irrigation irrigation canals and ditches and water quality monitoring and sampling；
2, stainless steel mesh substitutes common micropore diffusion film (such as poly (ether sulfone) film) in existing Passive sampler at present,
Greatly improve sampling efficiency；
3, using the design of assembling easy to disassemble, be conducive to be directed to different target pollutant, replace sorbing material, raising is adopted
The accumulation ability of sample device reduces interference, reduces cost；
4, the degree of purification of sample can be enhanced to avoid the interference of suspended matter, planktonic organism to sampling in water.
5, for the present invention during modification of methanol-water mixed solution, macroporous absorbent resin XAD-7 can be completeer
It sucks moisture entirely and is expanded, increase the porosity of resin so that methanol hydroxylethyl infiltration is deep into XAD-7 resin voids
In, it is highly polar due to hydroxyl, hydrophilic organics hydrophilicity can be quickly adsorbed from water.XAD-7 resins modified, both retained
The characteristics such as original wettability, stability, mechanical strength, but also with the ability of efficient absorption hydrophily organic pollution.
Description of the drawings
Fig. 1 is the structural schematic diagram of Passive sampler of the present invention.
Fig. 2 is the structural schematic diagram of ring flange of the present invention.
Fig. 3 is the structural schematic diagram of wing screw of the present invention.
Fig. 4 is the structural schematic diagram of wing nut of the present invention.
Fig. 5 is stainless steel mesh of the present invention and conventional microporous diffusion film contrast schematic diagram.
Fig. 6 is that the adsorbance of Passive sampler of the present invention changes with time situation schematic diagram.
In figure：1- ring flanges, 2- sieves, 3- adsorbents, 4- threaded holes, 5- wing screws, 6- wing nuts.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.It is described below for disclosing this
Invention is so that those skilled in the art can realize the present invention.Preferred embodiment in being described below is only used as illustrating, this field
Technical staff is contemplated that other obvious modifications.
As shown in Figs 1-4：A kind of Passive sampler for the acquisition of hydrophily organic pollution, including outer framework and sieve
2, the outer framework is the ring flange 1 of ellipse, is made of stainless steel, and the long side outer diameter of the ring flange 1 is 70mm,
Internal diameter is 33mm, and short side outer diameter is 55mm, internal diameter 33mm, thickness 3mm；Threaded hole there are four being opened up on the ring flange 1
4, four threaded holes 4 are uniformly arranged along the length diameter both ends of the ring flange 1 of ellipse, are equipped in the threaded hole 4
Thumb screw 5,5 end of the thumb screw are socketed with wing nut 6；The sieve 2 is made of 304 stainless steels, institute
It is 300 mesh to state sieve 2, and 48 μm of aperture can filter out suspended particulate common in water, and sieve 2 is arranged in ring flange 1
Centre, sieve 2 are circular configuration, and diameter is less than the outer diameter of ring flange 1 and the internal diameter more than ring flange 1, specially diameter 45mm, institute
The inner surface for being respectively overlay in ring flange 1 there are two sieves 2 is stated, and is placed with the MCX that loading is 1g among two sieves 2
Mixed type cation exchanges reverse phase absorption agent 3.
Using the method for sampling of the Passive sampler of hydrophily organic pollution of the present invention acquisition, including following step
Suddenly：
(1) weigh 1g MCX mixed type cations exchange reverse phase absorption agent, before use, successively use methanol, ultra-pure water,
The hydrochloric acid solution of pH=2 is activated, and the adsorbent 3 after activation is placed between two stainless steel mesh；
(2) two stainless steel mesh 2 are adhered to respectively on the inner wall of steel flange disk 1, recycle wing screw 5 will
Ring flange 1 seals, and screws on wing nut 6 in the end of wing screw 5, forms Passive sampler；
(3) Passive sampler for fixing sealing, is positioned in city sewer well；
(4) Passive sampler is placed in sewer well 24 hours, makes the abundant adsorbed target pollutant of Passive sampler；
Terminate sampling after (5) 24 hours, Passive sampler is taken out, sampler is rinsed with ultra-pure water；
(6) it rinses after drying, ring flange 1 is opened, take out the exchange reverse phase absorption agent of MCX mixed type cations and be placed in cleaning
Glass funnel in, to be adsorbed with target contaminant MCX mixed type cations exchange reverse phase absorption agent elute；
(7) technical conditions eluted：Glass funnel is placed on funnel stand, connects a clean beaker below.To glass
The methanol of 10mL chromatographically pures is slowly added in glass funnel, the speed control of addition about elutes 10 minutes in 1mL/min；It adds
The speed control of the methanolic ammonia solution of 6mL a concentration of 5%, addition about elutes 6 minutes in 1mL/min；
(8) liquid eluted twice is mixed, obtains eluent, experimental analysis is carried out to eluent.
Conventional microporous diffusion film (such as poly (ether sulfone) film) is changed to stainless steel mesh by Passive sampler of the present invention,
The efficiency for greatly improving passive sampling, reduces cost.The two comparing result is as shown in Figure 5.
The adsorbance of Passive sampler of the present invention changes with time situation：It is placed simultaneously in sewer well more
A Passive sampler takes out after 2,4,8,10,16,24 hours respectively, measures the amount of the target contaminant of its absorption.
Measurement result is shown：Good linear relationship, the time that sampler is placed is presented with standing time in the adsorbance of Passive sampler
Longer, adsorbance is higher.The experimental results showed that the Passive sampler has good application performance.
The adsorbance of the Passive sampler situation that changes with time is as shown in Figure 6.
In addition, the adsorbent (3) of the present invention can also select macroporous absorbent resin XAD-7.It is highly preferred that macroporous absorption tree
Fat XAD-7 can pass through methanol-water mixed solution and be modified, and modification procedure is as follows：
(1) the macroporous absorbent resin XAD-7 resins for taking 100 grams, are placed in beaker, are 1 with the volume ratio of 5 times of quality：1
Methanol-water mixed solution, impregnate 15 minutes.Soaking process is completed in constant temperature air bath oscillator, and concussion temperature is set as
25 degrees Celsius, frequency of oscillation is 100 revs/min, and macroporous absorbent resin XAD-7 is made to be come into full contact with methanol-water mixed solution.
(2) 5 minutes are stood, siphons away supernatant liquid.The volume ratio for refilling 5 times of quality is 1：1 methanol-water mixing is molten
Liquid repeats above procedure, is repeated 3 times altogether, and modified macroporous absorbent resin XAD-7 is made；
(3) it by treated macroporous absorbent resin XAD-7, is positioned in 50 degrees Celsius of constant temperature oven, drying is extremely
Constant weight.
During the modification of the methanol-water mixed solution, macroporous absorbent resin XAD-7 can more fully inhale
Entering moisture and expanded, increases the porosity of resin so that methanol hydroxylethyl infiltration is deep into XAD-7 resin voids, by
In the highly polar of hydroxyl, hydrophilic organics hydrophilicity can be quickly adsorbed from water.XAD-7 resins modified, both remain original
The characteristics such as some wettabilities, stability, mechanical strength, but also with the ability of efficient absorption hydrophily organic pollution.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these variation and
Improvement is both fallen in the range of claimed invention.The present invention claims protection domain by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of Passive sampler for the acquisition of hydrophily organic pollution, including outer framework and sieve (2), feature exists
In：The outer framework be ellipse ring flange (1), be made of stainless steel, opened up on the ring flange (1) there are four
Threaded hole (4), the threaded hole (4) is interior to be equipped with thumb screw (5), and thumb screw (5) end is socketed with wing nut
(6)；The sieve (2) is stainless steel mesh, and in ring flange (1) center, there are two the sieves (2), is respectively overlay in for setting
The inner surface of ring flange (1), and it is placed with adsorbent (3) among two sieves (2).
2. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 1, it is characterised in that：
Four threaded holes (3) are uniformly arranged along ring flange (1) length diameter both ends.
3. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 2, it is characterised in that：
Ring flange (1) long side outer diameter of the ellipse is 70mm, and internal diameter 33mm, short side outer diameter is 55mm, internal diameter 33mm, thickness
For 3mm.
4. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 3, it is characterised in that：
The sieve (2) is circular configuration, and diameter is less than the outer diameter of ring flange (1) and the internal diameter more than ring flange (1), specially directly
Diameter 45mm.
5. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 4, it is characterised in that：
The sieve (2) is 300 mesh, 48 μm of aperture.
6. according to a kind of Passive sampler for the acquisition of hydrophily organic pollution of claim 1-5 any one of them,
It is characterized in that：The adsorbent (3) is that MCX mixed type cations exchange reverse phase absorption agent, loading 1g.
7. according to a kind of Passive sampler for the acquisition of hydrophily organic pollution of claim 1-5 any one of them,
It is characterized in that：The adsorbent (3) is macroporous absorbent resin XAD-7.
8. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 7, it is characterised in that：
The macroporous absorbent resin XAD-7 is modified by methanol-water mixed solution, and specific modification procedure is as follows：
1) in constant temperature air bath oscillator, macroporous absorbent resin XAD-7 is taken, being immersed in methanol-water mixed solution makes macropore
Absorption resin XAD-7 resins come into full contact with methanol-water mixed solution；
2) after standing, supernatant liquid is siphoned away, refills the methanol-water mixed solution described in step 1), repeats above impregnate
Modified macroporous absorbent resin XAD-7 is made in process 3 times and 3 times or more；
3) modified macroporous absorbent resin XAD-7 made from step 2) is dried to constant weight.
9. a kind of Passive sampler for the acquisition of hydrophily organic pollution according to claim 8, it is characterised in that：
Step 1) and 2) in, the mass ratio of macroporous absorbent resin XAD-7 and methanol-water mixed solution is 1：5；The methanol-water is mixed
It is by methanol and water by volume 1 to close solution：1 is formulated；In step 1), concussion temperature is 25 degrees Celsius, and frequency of oscillation is
100 revs/min；In step 2), time of repose is 5 minutes, and baking oven thermostat temperature is 50 degrees Celsius.
10. a kind of method of sampling for the acquisition of hydrophily organic pollution includes the following steps：
1) the MCX mixed type cations for weighing 1g exchange reverse phase absorption agent, before use, using methanol, ultra-pure water, pH=2 successively
Hydrochloric acid solution activated, the adsorbent after activation is placed between two stainless steel mesh (2)；
2) two stainless steel mesh (2) are adhered to respectively on the inner wall of steel flange disk (1), recycle wing screw (5)
Ring flange (1) is sealed, wing nut (6) is screwed in the end of wing screw (5), forms Passive sampler；
3) Passive sampler for fixing sealing, is positioned in city sewer well；
4) Passive sampler is placed in sewer well 24 hours, makes the abundant adsorbed target pollutant of Passive sampler；
5) terminate sampling after 24 hours, Passive sampler is taken out, sampler is rinsed with ultra-pure water；
6) it rinses after drying, ring flange (1) is opened, take out the exchange reverse phase absorption agent of MCX mixed type cations and be placed in clean glass
In glass funnel, the MCX mixed type cations to being adsorbed with target contaminant exchange reverse phase absorption agent and elute；
7) technical conditions eluted：Glass funnel is placed on funnel stand, connects a clean beaker below；To glass funnel
In be slowly added to the methanol of 10mL chromatographically pures, the speed control of addition about elutes 10 minutes in 1mL/min, adds 6mL concentration
Speed control for 5% methanolic ammonia solution, addition about elutes 6 minutes in 1mL/min；
8) liquid eluted twice is mixed, obtains eluent, experimental analysis is carried out to eluent；
Experiment analysis results in the step (8) are the adsorbance and sampler of the target contaminant of Passive sampler absorption
Standing time good linear relationship is presented, sampler standing time is longer, and adsorbance is higher.
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