CN105498732A - Magnetic nano-imprinted compound adsorbent as well as preparation method and application thereof - Google Patents
Magnetic nano-imprinted compound adsorbent as well as preparation method and application thereof Download PDFInfo
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- CN105498732A CN105498732A CN201610065253.6A CN201610065253A CN105498732A CN 105498732 A CN105498732 A CN 105498732A CN 201610065253 A CN201610065253 A CN 201610065253A CN 105498732 A CN105498732 A CN 105498732A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/46—Materials comprising a mixture of inorganic and organic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
Abstract
The invention discloses a magnetic nano-imprinted compound adsorbent and a preparation method thereof, as well as a method for removing heavy metal ions from an aqueous solution by separation. The preparation method of the compound adsorbent lies in that chitosan is cross-linked to a magnetic nano-Fe3O4 carrier, and comprises the following steps: firstly, magnetic nano-Fe3O4 is prepared from FeCl2.4H2 and FeCl3.6H2O, then chitosan complexing with lead ions is compounded on the surface of magnetic nano-Fe3O4, and finally Pb (II) is eluted with an eluant, so that the compound adsorbent is obtained. The compound adsorbent provided by the invention has the characteristics of being high in mechanical property, large in specific surface area, plentiful in surface adsorption sites and prone to selective binding with template lead ions, is high in adsorption efficiency, has magnetic property, can be easily separated from an aqueous solution sample, and provides a new theory for the field of complex matrix treatment and application; secondly, the compound adsorbent is rich in raw material sources, low in cost and simple in preparation method and process, and can easily realize industrial production; thirdly, the compound adsorbent is high in removal efficiency of heavy metals, especially lead, and the treatment process is simple and easy to operate.
Description
Technical field
The present invention relates to a kind of magnetic Nano trace compound adsorbent and its production and use, specifically a kind of shitosan and magnetic Nano Fe
3o
4/ Pb (II) trace compound adsorbent and preparation method thereof and the method using this adsorbent to be separated lead in removal complicated substrate.
Background technology
Lead is that heavy metal lead has high toxicity and non-biodegradable, can damage human metabolism's system, and many countries and world organization all define plumbous permissible value for this reason to health most one of heavy metal element having harm.
Therefore, the method relating to the high selectivity separation and concentration of micro-/trace lead in environment, food, biology and the complicated substrate such as medical is noticeable especially.
At present, the method for separation and concentration heavy metal is selected to mainly contain chemical precipitation, UF membrane, redox, ion-exchange, electrochemistry and charcoal absorption etc.
But most method, owing to there is the shortcomings such as the high or easy generation secondary pollution of severe reaction conditions, efficiency operating cost, makes its using value greatly be restricted.
Wherein easy to operate, low to toxicant susceptibility, the good separating effect of absorption method, is considered to a kind of up-and-coming heavy metal method for separating and concentrating.
But the problem such as conventional adsorbent exists that adsorption capacity is little, mechanical strength is weak, disengaging time is long and running cost is high.
The imprinted polymer prepared based on molecular imprinting has both the advantage of biological and chemical identification system, separation and concentration microsphere and analogue can be selected from complex sample, demonstrate good development potentiality and application prospect in the pre-treatment field of complex sample.
Therefore, one more easily realizes quick separating and simple to operate, and what can be used for complicated substrate pre-treatment is that magnetic blotting compound adsorbent of combining with engram technology of carrier and preparation method thereof just arises at the historic moment with magnetic nanoparticle.
Summary of the invention
The object of this invention is to provide one and more easily realize quick separating and simple to operate, what can be used for complicated substrate pre-treatment take magnetic nanoparticle as magnetic blotting compound adsorbent of combining with engram technology of carrier and preparation method thereof, a kind of shitosan and magnetic Nano Fe specifically
3o
4/ Pb (II) trace compound adsorbent and preparation method thereof and the method using this adsorbent to be separated lead in removal complicated substrate.
Object of the present invention is mainly achieved through the following technical solutions.
Magnetic Nano Fe
3o
4synthesis: in 100mL deionized water, dissolve 1.5-3.5gFeCl
2.4H
2o and 4.5-10gFeCl
3.6H
2o, stirs 5-15min in oxygen-free environment, is made into ferric chloride solution.
Above-mentioned oxygen-free environment is preferably nitrogen or inert gas environment.
Dropwise drip the ammoniacal liquor of concentration 20-30% to ferric chloride solution, until pH value 9.5-10.5, sustained response 25-35min, after 25-35min is stablized in the maturing agent ageing adding 15-25mL0.2-0.3M, carries out Separation of Solid and Liquid and gets solid phase.
Above-mentioned Separation of Solid and Liquid preferably adopts Magnetic Isolation: inserted by the ferric chloride solution after ageing in the magnetic container of tool or passage, the magnetic tri-iron tetroxide solid phase of tool can quick adsorption on container or conduit wall, can quick separating be realized.
Need several 10 hours relative to gravity natural subsidence, adopt Magnetic Isolation only to need 10-20 just can realize solid-liquid second and be separated completely.
By gained solid phase distilled water and absolute ethyl alcohol cyclic washing 2-3 time, 50-60 DEG C of oven dry, grinds, sieves, obtain magnetic Nano Fe
3o
4.
Magnetic Nano Fe
3o
4the preparation of/Pb (II) trace compound adsorbent:
Being dissolved in by 0.1-0.3g shitosan in the acetum of 10-15mL2-3% (v/v), is 5000-6000mgL with 4-6mL concentration
-1lead nitrate solution mixes, and stirs 5-8h, after making shitosan and the abundant complexing of Pb (II), then adds 0.1-0.3g magnetic Nano Fe
3o
4particle and 0.2-0.5mL epoxychloropropane solution, dropwise add 0.2molL
-1sodium hydroxide solution regulates solution to regulate solution ph to be 9.5-10.5,25-30 DEG C of water bath with thermostatic control and uniform stirring cross-linking reaction 2-4 hour, add curing agent and the 15-25mL distilled water of 5-15mL10-15%, at room temperature 6-8 hour is solidified after stirring 10-20min, filter and in vacuum drying chamber 50-60 DEG C of oven dry, pulverize.
Use 0.1-0.3molL
-1edta solution drying is pulverized after powder carry out washing 1-3h to remove Pb
2+, and then use 0.1-0.3molL
-10.5-2h is to remove ethylenediamine tetra-acetic acid in NaOH solution washing.Filter rear deionized water and acetone cyclic washing 3-5 time, 50-60 DEG C of oven dry, grinds, sieves, and obtains magnetic Nano trace compound adsorbent of the present invention.
Above-mentioned maturing agent is one or both mixtures in any proportion in natrium citricum, sodium phosphate trimer.
Above-mentioned curing agent is one or more mixtures in any proportion in sodium phosphate trimer, ammoniacal liquor, silicate or alkaline sodium salt, described silicate is one or more in sodium metasilicate, sodium metasilicate or calcium silicates, and described alkaline sodium salt is one or more in sodium carbonate, sodium acid carbonate, sodium sulfite, sodium acetate or sodium metaaluminate.
Above-mentioned magnetic Nano trace compound adsorbent is utilized to be separated the heavy metal ion removed in solution, comprise the following steps: add this compound adsorbent to containing in the aqueous solution of heavy metal ion, it is 0.5-2.5g that every 100ml water containing heavy metal ion solution adds compound adsorbent consumption, be 2-8 by the nitric acid of 0.5-2.0% (v/v) and/or ammonia spirit adjust ph, in the constant temperature oscillator of reaction temperature 25-65 DEG C, control rotating speed 80-150 rev/min, oscillating reactions 5min-8h, carry out Separation of Solid and Liquid afterwards, gained liquid phase is the rear solution of purification.
Preferably, above-mentioned magnetic Nano trace compound adsorbent is utilized to be separated Pb (II) ion removed in solution.
Above-mentioned Separation of Solid and Liquid preferably adopts Magnetic Isolation: by purification after solution insert in the magnetic container of tool or passage, the magnetic solid phase of tool can quick adsorption on container or conduit wall, can quick separating be realized.
The magnetic Fe that method of the present invention is obtained
3o
4for average grain diameter is the nanosphere of 30nm, this structure is conducive to nano particle and is distributed to uniformly in chitosan solution, and be finally coated in Chitosan Beads and form composite, gained composite to be the particle diameter of particulate the be spherical hollow structure of about 1.2 μm, its unit mass has larger specific area compared with solid construction.
Compared with prior art, magnetic Nano trace compound adsorbent of the present invention has that mechanical performance is strong, specific area is large, adsorption site is many and easily and template lead ion select the feature that combines, adsorption efficiency is high, and it has magnetic, be easy to be separated from aqueous sample, for the process application of complex matrices provides new theory, two is that raw material sources enriches, cost is low, and its preparation method and technique simple, easily realize suitability for industrialized production, three is high for the removal efficiency of heavy metal lead, and treatment process is simple and be easy to operation.
Accompanying drawing explanation
Fig. 1 is magnetic Fe of the present invention
3o
4observation figure under transmission electron microscope.
Fig. 2 is the scanning electron microscope (SEM) photograph of magnetic Nano trace composite of the present invention.
Fig. 3 is that different pH value is separated the impact analysis figure removing lead ion in the aqueous solution to magnetic Nano trace compound adsorbent of the present invention.
Fig. 4 is different time on the impact of the magnetic Nano trace composite of the present invention separating treatment of lead ion in aqueous.
Fig. 5 is that the variable concentrations aqueous solution is on the impact of magnetic Nano trace composite of the present invention in the separating treatment of lead ion.
Fig. 6 is that different temperatures is on the impact of magnetic Nano trace composite of the present invention in the separating treatment of aqueous solution lead ion.
Fig. 7 is that other metal ion is on the impact of magnetic Nano trace composite of the present invention in the separating treatment of aqueous solution lead ion.
Detailed description of the invention
The following detailed description of the preferred embodiment of the present invention.
Embodiment 1: be magnetic Nano trace compound adsorbent of the present invention and preparation, process is as follows:
Magnetic Nano Fe
3o
4synthesis: in 100mL deionized water, dissolve 1.5-3.5gFeCl
2.4H
2o and 4.5-10gFeCl
3.6H
2o, stirs 5-15min in nitrogen environment, is made into ferric chloride solution.
Dropwise drip concentration 20-30% ammoniacal liquor, until pH is 9.5-10.5; After reaction 25-35min, 25-35min is stablized in the natrium citricum ageing adding 15-25mL0.2-0.3M.
Magnetic Isolation: the ferric chloride solution after ageing is inserted in the magnetic container of tool or passage, the magnetic tri-iron tetroxide solid phase of tool can quick adsorption on container or conduit wall, quick separating, gets solid phase.
By gained solid phase distilled water and absolute ethyl alcohol cyclic washing 2-3 time, 50-60 DEG C of oven dry, grinds, sieves, obtain magnetic Nano Fe
3o
4particle.
Magnetic Nano Fe
3o
4the preparation of/Pb (II) trace compound adsorbent: be dissolved in by 0.1-0.3g shitosan in the acetum of 10-15mL2-3% (v/v) is 5000-6000mgL with 4-6mL concentration
-1lead nitrate solution mixes, strong stirring 5-8h under 700-1000r/min, makes shitosan and Pb (II) fully complexing, then adds 0.1-0.3g magnetic Nano Fe
3o
4particle and 0.2-0.5mL epoxychloropropane solution, and dropwise add 0.2molL
-1sodium hydroxide solution regulates solution to regulate solution ph to be 9.5-10.5,25-30 DEG C of water bath with thermostatic control after uniform stirring cross-linking reaction 2-4 hour, add sodium phosphate trimer curing agent and the 15-25mL distilled water of 5-15mL10-15%, at room temperature 6-8 hour is solidified after stirring 10-20min, filter and in vacuum drying chamber 50-60 DEG C of oven dry, pulverize.Use 0.1-0.3molL
-1edta solution drying is pulverized after powder, washing 1-3h to remove Pb
2+, and then use 0.1-0.3molL
-1naOH solution washing powder 0.5-2h is to remove ethylenediamine tetra-acetic acid.Filter rear deionized water and acetone cyclic washing 3-5 time, 50-60 DEG C of oven dry, grinds, sieves.Obtain shitosan magnetic nanometer Fe of the present invention
3o
4/ Pb (II) trace compound adsorbent.
By above-mentioned obtained magnetic Fe
3o
4be placed in transmission electron microscope under observe, as shown in Figure 1, the Fe of preparation can be found out
3o
4for average grain diameter is the nanosphere of 30nm, this structure is conducive to nano particle and is distributed to uniformly in chitosan solution, and be finally coated in Chitosan Beads and form composite, as shown in Figure 2, the particle diameter of particulate is about 1.2 μm, gained composite is spherical hollow structure, and its unit mass has larger specific area compared with solid construction.
Embodiment 2: be the application example of magnetic Nano trace compound adsorbent of the present invention.
The leaded deionized water solution of each test is 20mL, adding compound adsorbent consumption of the present invention is 0.1-0.5g, be 2-8 with 0.5-2.0% (v/v) nitric acid and ammonia spirit adjust ph, reaction temperature 25-65 DEG C, in constant temperature oscillator, control rotating speed 80-150 rev/min, oscillating reactions 5min-8h, after reaction, adsorbent and solution are carried out Separation of Solid and Liquid, complete and the separation of Pb (II) is removed.Separation of Solid and Liquid adopt Magnetic Isolation: by purification after solution insert in the magnetic container of tool or passage, the magnetic solid phase of tool can quick adsorption on container or conduit wall, can quick separating be realized.
Magnetic Nano trace compound adsorbent of the present invention is added in leaded deionized water solution and carries out separating treatment,
Fig. 3 is 7 parts of 20mgL
-1pb
2+solution, when pH is respectively 2,3,4,5,6,7, example when 8, adds adsorbent 0.1g, in 25 DEG C in constant temperature oscillator, rotating speed is 100 turns/min, duration of oscillation is 2h, and adsorption process terminates rear FAAS method and to measure in solution not by the content of residual lead ion adsorbed, and calculates adsorbance result figure.
As shown in Figure 3, solution ph obviously affects the absorption of adsorbent to Pb (II).Along with the increase of pH value, adsorbent reaches maximum to the adsorption capacity of Pb (II) when pH5 ~ 6, and as pH>7, adsorbent is to Pb
2+slowly declining gradually of adsorption capacity.
Fig. 4 gets the lead ion solution that initial concentration is 20mg/L, pH value is 5 ~ 6, all adds 0.1g compound adsorbent, carries out adsorption reaction in 25 DEG C at gas bath constant temperature oscillator, rotating speed is 100 turns/min, sample analysis result figure on each time point after the reaction between 5min-480min.To measure in solution not by the content of residual lead ion adsorbed by FAAS method, as shown in Figure 4, adsorption capacity increases sharply when 60min, prolongation in time, and the rate of adsorption slows down gradually, and adsorbance is also close to saturated.During 120min, substantially reach adsorption equilibrium.
Fig. 5 for get that 9 initial concentrations are respectively 5,10,20,50,100,150, the example of 200,250,300mg/L lead ion solution, the pH value regulating solution is 5-6, add magnetic Nano trace compound adsorbent 0.1g of the present invention respectively, carry out vibration adsorption reaction at 25 DEG C of air bath constant temperature oscillators, rotating speed is 100 turns/min, Separation of Solid and Liquid after 2 hours, to measure in solution not by the content of residual lead ion adsorbed by FAAS method.As shown in Figure 5, adsorbance increases along with the increase of Pb (II) initial concentration, works as Pb
2+initial concentration 200mgL
-1time adsorbance reach 32.48mgg
-1.
Fig. 6 gets the lead ion solution that initial concentration is 20mg/L, regulate pH5 ~ 6, add magnetic Nano trace compound adsorbent 0.1g of the present invention respectively, respectively at 25 DEG C, 35 DEG C, 45 DEG C, 55 DEG C, the gas bath constant temperature oscillator of 65 DEG C carries out the example of adsorption reaction, and rotating speed is 100 turns/min, Separation of Solid and Liquid after 2 hours, to measure in solution not by the content of residual lead ion adsorbed by FAAS method.The adsorbance calculated the results are shown in Figure 6.As shown in Figure 6, the adsorbance of Pb (II) reduces along with the rising of temperature.
Fig. 7 is that to get initial concentration be respectively the Cu that the lead ion solution of 100mg/L is close with radius
2+, Cd
2+, Ni
2+and Zn
2+as competing ions, regulate pH5 ~ 6, add magnetic Nano trace compound adsorbent 0.5g of the present invention respectively, vibration adsorption reaction is carried out at 25 DEG C of air bath constant temperature oscillators, rotating speed is 100 turns/min, with magnet, adsorbent is separated with solution after 2 hours, measures in solution not by the content of residual lead ion adsorbed by FAAS method.Result of calculation is shown in Fig. 7.As shown in Figure 7, trace compound adsorbent is to Pb
2+there is higher adsorption capacity, then relatively low to the adsorption capacity of competing ions, but not trace compound adsorbent is under the same conditions, to competing ions and Pb
2+adsorption capacity there is no marked difference.Result shows, even if shitosan magnetic nanometer Fe of the present invention
3o
4when there is other ion interference in/Pb (II) trace compound adsorbent, also can to Pb
2+there is good adsorption selection effect.This illustrates that the geometry in trace hole and the geometry of lead ion are coincide, thus demonstrates the selective of height.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred embodiment should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made and also should be considered as protection scope of the present invention.
Claims (9)
1. a preparation method for magnetic Nano trace compound adsorbent, is characterized in that: mainly comprise following process:
Magnetic Nano Fe
3o
4synthesis:
1.5-3.5gFeCl is dissolved in 100mL deionized water
2.4H
2o and 4.5-10gFeCl
3.6H
2o, stirs 5-15min in oxygen-free environment, is made into ferric chloride solution;
The ammoniacal liquor of concentration 20-30% is dropwise dripped to ferric chloride solution, until pH value 9.5-10.5, sustained response 25-35min, 25-35min is stablized in the maturing agent ageing adding 15-25mL0.2-0.3M,
Separation of Solid and Liquid;
By gained solid phase distilled water and absolute ethyl alcohol cyclic washing 2-3 time, 50-60 DEG C of oven dry, grinds, sieves, obtain magnetic Nano Fe
3o
4particle;
Magnetic Nano Fe
3o
4the preparation of/Pb (II) trace compound adsorbent:
Being dissolved in by 0.1-0.3g shitosan in the acetum of 10-15mL2-3% (v/v), is 5000-6000mgL with 4-6mL concentration
-1lead nitrate solution mixes, and stirs 5-8h, after making shitosan and the abundant complexing of Pb (II), then adds 0.1-0.3g magnetic Nano Fe
3o
4particle and 0.2-0.5mL epoxychloropropane solution, add 0.2molL
-1sodium hydroxide solution regulates solution to regulate solution ph to be 9.5-10.5,25-30 DEG C of water bath with thermostatic control and uniform stirring cross-linking reaction 2-4 hour, add curing agent and the 15-25mL distilled water of 5-15mL10-15%, at room temperature 6-8 hour is solidified after stirring 10-20min, filter and dry, pulverize;
Use 0.1-0.3molL
-1edta solution washing 1-3h is carried out to remove Pb to dried powder
2+, then use 0.1-0.3molL
-10.5-2h is to remove ethylenediamine tetra-acetic acid in NaOH solution washing, and filter rear deionized water and acetone cyclic washing 3-5 time, 50-60 DEG C of oven dry, grinds, sieves, and obtains magnetic Nano trace compound adsorbent of the present invention;
Described maturing agent is one or both mixtures in any proportion in natrium citricum, sodium phosphate trimer;
Described curing agent is one or more mixtures in any proportion in sodium phosphate trimer, ammoniacal liquor, silicate or alkaline sodium salt.
2. the preparation method of magnetic Nano trace compound adsorbent according to claim 1, it is characterized in that: described Separation of Solid and Liquid adopts Magnetic Isolation: inserted by the ferric chloride solution after ageing in the magnetic container of tool or passage, tri-iron tetroxide solid phase adsorption on container or conduit wall, to realize quick Separation of Solid and Liquid.
3. the preparation method of magnetic Nano trace compound adsorbent according to claim 1 and 2, it is characterized in that: described silicate is the one or several arbitrarily in sodium metasilicate, sodium metasilicate or calcium silicates, described alkaline sodium salt is the one or several arbitrarily in sodium carbonate, sodium acid carbonate, sodium sulfite, sodium acetate or sodium metaaluminate.
4. the preparation method of magnetic Nano trace compound adsorbent according to claim 1 and 2, is characterized in that: described oxygen-free environment is nitrogen or inert gas environment.
5. the preparation method of magnetic Nano trace compound adsorbent according to claim 3, is characterized in that: described oxygen-free environment is nitrogen or inert gas environment.
6. a magnetic Nano trace compound adsorbent, is characterized in that: the method preparation according to any one of claim 1-5.
7. the purposes of a magnetic Nano trace compound adsorbent according to claim 6, it is characterized in that: the magnetic Nano trace compound adsorbent described in utilization is separated the heavy metal ion removed in solution, comprise following steps: add this compound adsorbent to containing in the aqueous solution of heavy metal ion, it is 0.5-2.5g that every 100ml water containing heavy metal ion solution adds compound adsorbent consumption, be 2-8 by the nitric acid of 0.5-2.0% (v/v) and/or ammonia spirit adjust ph, in the constant temperature oscillator of reaction temperature 25-65 DEG C, control rotating speed 80-150 rev/min, oscillating reactions 5min-8h, carry out Separation of Solid and Liquid afterwards, gained liquid phase is the rear solution of purification.
8. the purposes of magnetic Nano trace compound adsorbent according to claim 7, is characterized in that: the heavy metal ion in described solution is Pb (II) ion.
9. the purposes of the magnetic Nano trace compound adsorbent according to claim 7 or 8, it is characterized in that: described Separation of Solid and Liquid adopts Magnetic Isolation: the solution after purification is inserted in the magnetic container of tool or passage, the magnetic solid phase of tool can quick adsorption on container or conduit wall, realize be separated.
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| CN107486178A (en) * | 2017-09-15 | 2017-12-19 | 桂林理工大学 | Amination cross-linking type MA/AA grafting xanthic acid is esterified the preparation of tapioca magnetic blotting microballoon and lead ion is adsorbed |
| CN107529520A (en) * | 2017-10-09 | 2018-01-02 | 天津工业大学 | A kind of method of rapidly and efficiently Adsorption heavy metal ion |
| CN107684904A (en) * | 2017-10-27 | 2018-02-13 | 成都理工大学 | A kind of chitose magnetic fluid water quality purification material, preparation method and applications |
| CN110508262A (en) * | 2019-07-29 | 2019-11-29 | 肇庆学院 | A kind of lead cadmium ion trace magnetism SBA-15 particle and preparation method thereof |
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