CN105854846A - Dopamine-modified adsorbent as well as preparation and application thereof - Google Patents

Dopamine-modified adsorbent as well as preparation and application thereof Download PDF

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Publication number
CN105854846A
CN105854846A CN201610466046.1A CN201610466046A CN105854846A CN 105854846 A CN105854846 A CN 105854846A CN 201610466046 A CN201610466046 A CN 201610466046A CN 105854846 A CN105854846 A CN 105854846A
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China
Prior art keywords
dopamine
adsorbent
fiber
heavy metal
nano
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Pending
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CN201610466046.1A
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Chinese (zh)
Inventor
王孝军
邱芳
杨杰
卫志美
张刚
龙盛如
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Sichuan University
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Sichuan University
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Priority to CN201610466046.1A priority Critical patent/CN105854846A/en
Publication of CN105854846A publication Critical patent/CN105854846A/en
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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
    • B01J20/22—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
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
    • 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
    • B01J20/28014—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 form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • 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
    • C02F2303/16—Regeneration of sorbents, filters

Abstract

The invention relates to the technical field of high molecular materials and the field of wastewater treatment and particularly relates to a dopamine-modified adsorbent, preparation thereof and a treatment method of heavy metal wastewater. The dopamine-modified adsorbent provided by the invention has a core-shell structure; a shell is polydopamine and a core is a nano-micron-grade organic fiber; and the mass ratio of the core to the shell ranges from (5:1) to (25:1). In a heavy metal water solution with certain potential of hydrogen, a plurality of types of heavy metal ions can be rapidly adsorbed by the adsorbent.

Description

Dopamine modified adsorbent and preparation thereof and use
Technical field
The present invention relates to technical field of polymer materials and field of waste water treatment, particularly relate to dopamine modified adsorbent and preparation thereof Processing method with heavy metal waste water.
Background technology
Along with developing rapidly of modern industry, the use of heavy metal is day by day frequent, and heavy metal pollution is to ecological environment and human health Harm be on the rise.Therefore, the heavy metal developed in effective method removal aqueous solution has important practical significance.Common The method of the heavy metal ion removed in aqueous solution have the exchange of chemical method, ion, electrolysis and absorption method etc., wherein absorption method There is the advantages such as easily operated, low energy consumption, low-residual, non-secondary pollution, high adsorption capacity and repeatable utilization, be a kind of economical, Method efficient and that be widely used and further investigate.The most conventional efficient adsorbent surface of comparison generally modifies electron rich official Can roll into a ball such as hydroxyl, amino, imino group etc..
Dopamine oxidation polymerization can form poly-dopamine under gentle aqueous conditions, and the poly-dopamine of formation sticks to matrix Material surface, it addition, poly-dopamine has abundant amino and a hydroxyl simultaneously, thus give the abundant amino of substrate material surface, Hydroxy functional group.Visible, poly-dopamine has as the potential modifying adsorbing material.
But prior art has not been used to adsorb the relevant report of the dopamine adsorbent of heavy metal ion in various solution.
Summary of the invention
The present invention is directed to drawbacks described above, it is provided that a kind of dopamine modified adsorbent, gained adsorbent has large specific surface area, it is possible to For adsorbing the heavy metal ion in various solution.
Technical scheme:
First technical problem that the invention solves the problems that is to provide a kind of dopamine modified adsorbent, and described adsorbent has nucleocapsid knot Structure, described shell is poly-dopamine, and described core is nano-micro level organic fiber, and the mass ratio of core and shell is at 5:1～25:1.
Further, described nano-micro level organic fiber is: polyethylene fibre, polypropylene fibre, polymethylmethacrylate fibers, Polycarbonate, styroflex, polyformaldehyde fibre, polycaprolactone fiber, polyether sulfone fiber or polyacrylonitrile fibre.
Second technical problem to be solved by this invention is to provide the preparation method of above-mentioned dopamine modified adsorbent: will receive micron Level organic fiber is placed in Tris-dopamine buffer solution and is reacted to the complete overstrike of fiber, controls Tris-dopamine buffer solution PH value in 7～11, and course of reaction, be passed through gas；Wherein, in Tris-dopamine buffer solution, the concentration of dopamine is 0.5～3g/L, nano-micro level organic fiber with the ratio of Tris-dopamine buffer solution is: the Tris-dopamine buffering of 500ml is molten Liquid is placed the nano-micro level organic fiber of 1～2g；Described gas is air, oxygen, N2Or CO2。
Further, the flow speed control of gas it is passed through at 5ml/min-500ml/min.
3rd technical problem to be solved by this invention is to provide the using method of above-mentioned dopamine modified adsorbent, i.e. uses DOPA Amine modified adsorbent adsorbs heavy metal ion in various solution, during use, is 20～80mg/L containing concentration of heavy metal ion 100mL solution uses 0.2～0.4g dopamine modified adsorbent, and controls the pH value in institute's adsorbent solution 2～8.
Further, in the using method of above-mentioned dopamine modified adsorbent, adsorbent uses 0.001～0.1mol/L NaOH after using Or 0.001～0.1mol/L HCl is cleaned multiple times adsorbent and carrys out De contamination heavy metal ion.
Further, in above-mentioned using method, described heavy metal ion is: Hg2+、Cu2+、Fe3+、La3+、Zn2+、Ni2+、Pb2+、 Mn2+、Cr3+、Cr207 2-、CrO4 2-、MnO4 -Or FeO4 2-。
Beneficial effects of the present invention:
The present invention, by adjusting the pH value of dopamine solution and being constantly passed through gas in aqueous dopamine solution, can obtain poly-dopamine The composite of complete cladding.In the heavy metal aqueous solution of certain acid-base value, contents of many kinds of heavy metal ion can be entered by this adsorbent Row quick adsorption.
Detailed description of the invention
First technical problem that the invention solves the problems that is to provide a kind of dopamine modified adsorbent, and described adsorbent has nucleocapsid knot Structure, described shell is poly-dopamine, and described core is nano-micro level organic fiber, and the mass ratio of core and shell is at 5:1～25:1.
Second technical problem to be solved by this invention is to provide the preparation method of above-mentioned dopamine modified adsorbent: will receive micron Level organic fiber is placed in Tris-dopamine buffer solution and is reacted to the complete overstrike of fiber, controls Tris-dopamine buffer solution PH value 7～11, and course of reaction is passed through gas；Wherein, in Tris-dopamine buffer solution, the concentration of dopamine is 0.5～3g/L, nano-micro level organic fiber with the ratio of Tris-dopamine buffer solution is: the Tris-dopamine buffering of 500ml is molten Liquid is placed the nano-micro level organic fiber of 1～2g；Described gas is air, oxygen, N2Or CO2.The present invention is at dopamine Auto polymerization during be constantly passed through gas, make poly-dopamine the most intactly be coated on polymer nano-micron level fibrous membrane.
Further, the flow speed control of gas it is passed through at 5ml/min-500ml/min.If gas flow rate is too fast, poly-dopamine is disturbed Dynamic relatively big, it exists the most in granular form at fiber surface, otherwise is then unfavorable for the poly-dopamine cladding completely at fiber surface.
3rd technical problem to be solved by this invention is to provide the using method of above-mentioned dopamine modified adsorbent, i.e. uses DOPA Amine modified adsorbent adsorbs heavy metal ion in various solution, during use, containing concentration of heavy metal ion be 20～80mg/L molten Liquid uses 0.2～0.4g dopamine modified adsorbent, and controls the pH value in institute's adsorbent solution 2～8.
In the present invention, adjust electrostatic charge character and the quantity of adsorbent surface by limiting the pH value of solution, poly-many by test Bar amine modified fibre Zeta potential in different pH solution, zero potential is 3.9, the adsorbent when pH value of solution is more than 3.9 Surface is electronegative, and when pH value of solution is less than 3.9, adsorbent surface is positively charged, therefore can be by controlling the pH value of solution Select Adsorption of Heavy Metal Ions.
Embodiment 1
In the embodiment of the present invention, preparation method be:
First Tris-dopamine buffer solution is prepared: in the volumetric flask of 1L, add 0.01mol trishydroxymethylaminomethane and 1g Dopamine also adds deionized water constant volume and is configured to dopamine buffer to graduation mark.
1-2g polyether sulfone fiber, in the range of 7-11, is placed in 1L container by the pH value of control dopamine buffer solution, to Wherein add 500mL above-mentioned dopamine buffer, in aqueous dopamine solution, be then passed through air, and be passed through the flow velocity control of gas System, in the range of 50-80ml/min, is taken out fiber and is terminated reaction when fiber becomes sepia completely.Dopamine generation auto polymerization is anti- Form poly-dopamine after should, stick to polyether sulfone fiber surface, thus obtain the composite fibre with nucleocapsid structure, i.e. adsorbent.
The adsorbent that dopamine is modified is used for the absorption of heavy metal ion in aqueous solution: first prepare Cr (VI) weight of certain condition Aqueous metal solution: solution ph controls at 2-4, Cr (VI) concentration is at 20-40mg/L；Then 0.2-0.4g adsorbent is placed in dress In having the container of 250mL of 100mL Cr (VI) aqueous solution, take out adsorbent after 2h and terminate adsorption process and test in aqueous solution The concentration of Cr, is cleaned multiple times adsorbent with deionized water and is dried；The most respectively with 0.1-0.001M NaOH and 0.1-0.001M HCl is cleaned multiple times adsorbent De contamination Cr；Repeat aforesaid operations step to carry out reusing performance test.
Under the conditions of faintly acid (pH is 2-4), this composite fibre presents the most excellent absorption property, composite fibre to Cr (VI) The saturated maximal absorptive capacity of Cr (VI) is reached 150mg/g, the suction of adsorbent after five absorption-De contamination reuse performance Attached amount is also in more than the 85% of initial adsorption amount, and this shows that this adsorbent also has the recycling performance of excellence.
Embodiment 2
First method with reference to embodiment 1 adds 0.01mol trishydroxymethylaminomethane and 2.0g dopamine in the volumetric flask of 1L It is configured to dopamine buffer, and controls the pH value of dopamine buffer solution in the range of 7-11,1-2g polystyrene is fine Dimension is placed in 1L container, is added to 500mL above-mentioned dopamine buffer, is then passed through air in aqueous dopamine solution Gas, and it is passed through the flow speed control of gas in the range of 140ml-180ml/min, formed poly-after dopamine generation auto polymerization reaction Dopamine, sticks to styroflex surface, thus obtains the composite fibre of nucleocapsid structure, i.e. adsorbent.
The adsorbent that dopamine is modified is used for the absorption of heavy metal ion in aqueous solution.First the Cu (II) of certain condition is prepared with much money Belong to aqueous solution: pH value of water solution controls at 2-6, and Cr (VI) concentration is at 50-80mg/L；Then 0.2-0.4g adsorbent is placed in dress In having the container of 250mL of 100mL Cu (II) aqueous solution, take out adsorbent after 24h and terminate adsorption process and test in aqueous solution The concentration of Cu (II).
With deionized water adsorbent it is cleaned multiple times and is dried；It is that 0.1-0.001M HCl is cleaned multiple times suction by concentration the most respectively Attached dose of De contamination Cu (II)；Repeat aforesaid operations step to carry out reusing performance test.
Under the conditions of faintly acid (pH is 2-6), Cu (II) is presented soon by the dopamine adsorbent (composite fibre) of this embodiment gained The absorption property that speed is excellent, composite fibre reaches 82.1mg/g to the saturated maximal absorptive capacity of Cu (II), through five absorption-desorptions After attached recycling performance, the adsorbance of adsorbent is also in more than the 85% of initial adsorption amount, and this shows that this adsorbent also has excellence Recycling performance.
Embodiment 3
First method with reference to embodiment 1 adds 0.01mol trishydroxymethylaminomethane and 3.0g dopamine in the volumetric flask of 1L It is configured to dopamine buffer, and controls the pH value of dopamine buffer solution in the range of 7-11, by 1-2g polyether sulfone fiber It is placed in 1L container, is added to 500mL above-mentioned dopamine buffer, in aqueous dopamine solution, is then passed through N2Gas, And it is passed through the flow speed control of gas in the range of 300ml-400ml/min, form poly-dopamine after dopamine generation auto polymerization reaction, Stick to polyether sulfone fiber surface, thus obtain the composite fibre of nucleocapsid structure, i.e. adsorbent.
The adsorbent that dopamine is modified is used for the absorption of heavy metal ion in aqueous solution.First the Zn (II) of certain condition is prepared with much money Belong to aqueous solution: solution ph controls at 4-7, and Zn (II) concentration is at 50-80mg/L；Then 0.2-0.4g adsorbent is placed in equipped with In the container of the 250mL of 100mLZn (II) aqueous solution, take out adsorbent after 6h and terminate adsorption process and test Zn in aqueous solution (II) Concentration, with deionized water adsorbent be cleaned multiple times and be dried；Adsorbent is cleaned multiple times with 0.1-0.001M HCl again to take off Absorption Zn (II)；Repeat aforesaid operations step to carry out reusing performance test.
Under the conditions of faintly acid (pH is 4-7), this composite fibre presents the most excellent absorption property, composite fibre to Zn (II) The saturated maximal absorptive capacity of Zn (II) is reached 134mg/g, the suction of adsorbent after five absorption-De contamination reuse performance Attached amount is also in more than the 85% of initial adsorption amount, and this shows that this adsorbent also has the recycling performance of excellence.

Claims (8)

1. dopamine modified adsorbent, it is characterised in that described adsorbent has nucleocapsid structure, described shell is poly-dopamine, institute Stating core is nano-micro level organic fiber, and the mass ratio of core and shell is at 5:1～25:1.
Dopamine modified adsorbent the most according to claim 1, it is characterised in that described nano-micro level organic fiber is: Polyethylene fibre, polypropylene fibre, polymethylmethacrylate fibers, polycarbonate, styroflex, polyformaldehyde Fiber, polycaprolactone fiber, polyether sulfone fiber or polyacrylonitrile fibre.
Dopamine modified adsorbent the most according to claim 2, it is characterised in that described nano-micro level organic fiber is poly- Ether sulfone fiber.
4. the preparation method of the dopamine modified adsorbent described in any one of claims 1 to 3, it is characterised in that described method is: Nano-micro level organic fiber is placed in Tris-dopamine buffer solution and reacts to the complete overstrike of fiber, control Tris-many The pH value of bar amine buffer solution is passed through gas in 7～11, and course of reaction；Wherein, many in Tris-dopamine buffer solution The concentration of bar amine is 0.5～3.0g/L, and nano-micro level organic fiber with the ratio of Tris-dopamine buffer solution is: the Tris-of 500ml Dopamine buffer solution is placed the nano-micro level organic fiber of 1～2g；Described gas is air, oxygen, N2Or CO2。
The preparation method of dopamine modified adsorbent the most according to claim 4, it is characterised in that be passed through the flow velocity of gas Control at 5ml/min-500ml/min.
6. the using method of dopamine modified adsorbent described in any one of claims 1 to 3, it is characterised in that use dopamine to change Property adsorbent adsorbs heavy metal ion in various solution, during use, containing the 100mL that concentration of heavy metal ion is 20～80mg/L Solution uses 0.2～0.4g dopamine modified adsorbent, and controls the pH value in institute's adsorbent solution 2～8.
The using method of dopamine modified adsorbent the most according to claim 6, it is characterised in that described dopamine modification is inhaled In the using method of attached dose, adsorbent uses 0.001～0.1mol/L NaOH or many times of 0.001～0.1mol/L HCl after using Clean adsorbent and carry out De contamination heavy metal ion.
8. according to the using method of dopamine modified adsorbent described in claim 6 or 7, it is characterised in that described dopamine changes In the using method of property adsorbent, described heavy metal ion is: Hg2+、Cu2+、Fe3+、La3+、Zn2+、Ni2+、Pb2+、 Mn2+、Cr3+、Cr207 2-、CrO4 2-、MnO4 -Or FeO4 2-。
CN201610466046.1A 2016-06-23 2016-06-23 Dopamine-modified adsorbent as well as preparation and application thereof Pending CN105854846A (en)

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Cited By (13)

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CN106757789A (en) * 2017-01-11 2017-05-31 西南交通大学 A kind of preparation method of super hydrophilic polyvinylidene fluoride/poly-dopamine laminated film
CN106984285A (en) * 2017-03-31 2017-07-28 华纺股份有限公司 The method that amination modifying sorbing material is prepared by matrix of polymer fiber material
CN108359407A (en) * 2018-03-14 2018-08-03 北京林业大学 A kind of modified vegetable protein adhesive and preparation method thereof
CN108906003A (en) * 2018-08-02 2018-11-30 南通大学 A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium
CN108978219A (en) * 2018-05-28 2018-12-11 泽塔纳米科技（苏州）有限公司 It is a kind of to cross Hg in drainage2+Nano-fiber material and preparation method thereof
CN109012595A (en) * 2018-09-06 2018-12-18 苏州佰锐生物科技有限公司 A kind of preparation method of modified carbon nano-tube adsorbent for heavy metal
CN109052542A (en) * 2018-09-06 2018-12-21 苏州佰锐生物科技有限公司 A kind of preparation method for the modified carbon nano-tube removing mercury ions in waste water
CN109052541A (en) * 2018-09-06 2018-12-21 苏州佰锐生物科技有限公司 A method of removal heavy metal in waste water nickel ion
CN110759696A (en) * 2019-11-13 2020-02-07 湖北工业大学 Preparation method of porous light ceramsite by taking phosphorus solid waste as raw material
CN111604036A (en) * 2019-02-26 2020-09-01 南京理工大学 Preparation method of polydopamine/graphene oxide fluffy nanofiber adsorbent
CN112427018A (en) * 2020-11-03 2021-03-02 常州市和润环保科技有限公司 Heavy metal wastewater biomass adsorbent and preparation method thereof
CN113578281A (en) * 2021-07-21 2021-11-02 宁夏师范学院 Preparation and application of corncob hydrothermal carbon @ polydopamine composite material
CN116393110A (en) * 2023-06-07 2023-07-07 泰和新材集团股份有限公司 Meta-aramid fiber-based composite adsorption material and preparation method and application thereof

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106757789B (en) * 2017-01-11 2019-01-08 西南交通大学 A kind of preparation method of super hydrophilic polyvinylidene fluoride/poly-dopamine laminated film
CN106757789A (en) * 2017-01-11 2017-05-31 西南交通大学 A kind of preparation method of super hydrophilic polyvinylidene fluoride/poly-dopamine laminated film
CN106984285A (en) * 2017-03-31 2017-07-28 华纺股份有限公司 The method that amination modifying sorbing material is prepared by matrix of polymer fiber material
CN106984285B (en) * 2017-03-31 2020-04-24 华纺股份有限公司 Method for preparing amination modified adsorption material by using polymer fiber material as matrix
CN108359407A (en) * 2018-03-14 2018-08-03 北京林业大学 A kind of modified vegetable protein adhesive and preparation method thereof
CN108359407B (en) * 2018-03-14 2020-07-28 北京林业大学 Modified vegetable protein adhesive and preparation method thereof
CN108978219A (en) * 2018-05-28 2018-12-11 泽塔纳米科技（苏州）有限公司 It is a kind of to cross Hg in drainage2+Nano-fiber material and preparation method thereof
CN108906003A (en) * 2018-08-02 2018-11-30 南通大学 A kind of preparation method of the polypropylene-base adsorbent material based on poly-dopamine modified lithium
CN109052541A (en) * 2018-09-06 2018-12-21 苏州佰锐生物科技有限公司 A method of removal heavy metal in waste water nickel ion
CN109052542A (en) * 2018-09-06 2018-12-21 苏州佰锐生物科技有限公司 A kind of preparation method for the modified carbon nano-tube removing mercury ions in waste water
CN109012595A (en) * 2018-09-06 2018-12-18 苏州佰锐生物科技有限公司 A kind of preparation method of modified carbon nano-tube adsorbent for heavy metal
CN111604036A (en) * 2019-02-26 2020-09-01 南京理工大学 Preparation method of polydopamine/graphene oxide fluffy nanofiber adsorbent
CN110759696A (en) * 2019-11-13 2020-02-07 湖北工业大学 Preparation method of porous light ceramsite by taking phosphorus solid waste as raw material
CN110759696B (en) * 2019-11-13 2021-08-13 湖北工业大学 Preparation method of porous light ceramsite by taking phosphorus solid waste as raw material
CN112427018A (en) * 2020-11-03 2021-03-02 常州市和润环保科技有限公司 Heavy metal wastewater biomass adsorbent and preparation method thereof
CN113578281A (en) * 2021-07-21 2021-11-02 宁夏师范学院 Preparation and application of corncob hydrothermal carbon @ polydopamine composite material
CN116393110A (en) * 2023-06-07 2023-07-07 泰和新材集团股份有限公司 Meta-aramid fiber-based composite adsorption material and preparation method and application thereof
CN116393110B (en) * 2023-06-07 2023-08-25 泰和新材集团股份有限公司 Meta-aramid fiber-based composite adsorption material and preparation method and application thereof

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Application publication date: 20160817