CN109453734A - A kind of MnO2Modified ferrihydrite adsorbing material and preparation method thereof - Google Patents
A kind of MnO2Modified ferrihydrite adsorbing material and preparation method thereof Download PDFInfo
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- CN109453734A CN109453734A CN201811355788.2A CN201811355788A CN109453734A CN 109453734 A CN109453734 A CN 109453734A CN 201811355788 A CN201811355788 A CN 201811355788A CN 109453734 A CN109453734 A CN 109453734A
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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
- B01J20/02—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
Abstract
A kind of MnO of system of the present invention2Modified ferrihydrite adsorbing material and preparation method thereof, belongs to ferrihydrite based composites technical field.It specifically includes the following steps: (1) synthesizing ferrihydrite.Nine water ferric nitrates are dissolved in deionized water, sodium hydroxide solution is added while stirring, pH value is adjusted to 7.0-8.0.Suspension is centrifuged, precipitating is collected, is cleaned by ultrasonic 5 times to remove electrolyte, is put into 80 DEG C of dry 6h in air dry oven, ferrihydrite is made.(2) MnO is prepared2Modified ferrihydrite.Potassium permanganate is dissolved in deionized water, ferrihydrite is added, a certain amount of Manganous sulfate monohydrate is added while stirring, continues to stir, gelation 4h.Suspension is centrifuged, supernatant is discarded, precipitating is rinsed 3 times to remove foreign ion with deionized water, is put into 60 DEG C of dry 6h in air dry oven, MnO is made2Modified ferrihydrite adsorbing material.The material has many advantages, such as large specific surface area, all has good adsorption properties to Cd (II), (V) two class ion of As.
Description
Technical field
The present invention provides a kind of MnO2Modified ferrihydrite adsorbing material and preparation method, belong to ferrihydrite based composites
Technical field.
Background technique
Ferrihydrite is one kind of FeOOH, is a kind of spherical nanoparticle of rufous, crystallizes weak, particle size
It is small, usually 2-6nm.Ferrihydrite is due to controlling and affecting certain in environment with big specific surface area and high surface-active
Form, migration and the conversion of a little polluters and nutrient, can be by adsorbing and being co-precipitated and the polluter in soil
Interaction, therefore it is commonly used for the adsorbent of various pollutants matter.Wang Wei et al. is inhaled using artificial synthesized ferrihydrite as doping
Attached dose, the adsorptivity of deposit counterweight Metal Ions Cd before and after adulterating ferrihydrite of the Yellow River Wulate Front Banner segment table layer is probed into
Energy.The study found that be optimal adsorption condition when adulterating ferrihydrite 3%, pH=6.5,25 DEG C, oscillation 120min, at this time heavy
Product object can achieve 2.15mgg to the adsorbance of Cd-1；And the doping ratio of ferrihydrite is higher, absorption of the deposit to Cd
Performance is better.Cui Huiying et al. has studied ferrihydrite to the adsorptivity of As (III) using artificial synthesized ferrihydrite as adsorbent material
Energy.As a result, it has been found that ferrihydrite can achieve 99.5% to the removal rate highest of As (III)；Adsorbance at 35 DEG C is than 25 DEG C
Greatly；In addition, solution ph also has critically important influence to ferrihydrite absorption As (III), as pH < 8 adsorbance and adsorption rate with
PH rises and increases, and reaches maximum as pH=8, and as pH > 8, adsorbance and adsorption rate can be reduced as pH rises.
MnO2It is a kind of important manganese series oxides, possesses huge specific surface area and more surface hydroxyl, adsorbing
There is excellent absorption property in terms of pollutant.Accordingly, it is considered to utilize MnO2Ferrihydrite is modified, it is desired to be able to mention simultaneously
Adsorption effect of the high ferrihydrite to (V) two kind of Cd (II), As ion.
Summary of the invention
The purpose of the present invention is to provide a kind of MnO2Modified ferrihydrite adsorbing material and preparation method, it is specifically a kind of
Using ferrihydrite as matrix, MnO2Make the ferrihydrite based composites and preparation method of modifying agent.
Wherein preparing modifying agent used in the material is MnO2。
The wherein modifying agent MnO used in experiment2It is that chemical reaction system is occurred by potassium permanganate and Manganous sulfate monohydrate
?.
The present invention provides a kind of MnO2Modified ferrihydrite adsorbing material and preparation method, advantage and effect are the material
Material large specific surface area all has good absorption property to Cd (II), (V) two class ion of As.
Detailed description of the invention
Fig. 1 synthesizes ferrihydrite and MnO2Modified ferrihydrite SEM photograph ((a) ferrihydrite；(b)MnO2Modified ferrihydrite)
Fig. 2 MnO2Modified ferrihydrite XRD spectrum
Fig. 3 MnO2Modified ferrihydrite is to Cd (II) and As (V) ion remaval rate
Specific embodiment
The features of the present invention is described further below with reference to example, but is not intended to be limited to following embodiments.
Embodiment one:
Nine water ferric nitrates are dissolved in deionized water first, are placed on magnetic stirring apparatus, it is molten that sodium hydroxide is added while stirring
PH value is adjusted to 7.0-8.0 by liquid.Suspension is centrifuged, precipitating is collected, is cleaned by ultrasonic 5 times to remove electrolyte, it is dry to be put into air blast
In dry case, ferrihydrite is made in 80 DEG C of dry 4h.Potassium permanganate is dissolved in deionized water, ferrihydrite is added, is placed in magnetic stirring apparatus
On, a certain amount of Manganous sulfate monohydrate is added while stirring, makes the MnO generated2It is 1:2 with the mass ratio that ferrihydrite is added, after
Continuous stirring, gelation 2h.Suspension is centrifuged, supernatant is discarded, with deionized water flushing precipitating 3 times to remove foreign ion,
It is put into air dry oven, 60 DEG C of dry 6h, MnO is made2Modified ferrihydrite sample.Wherein, modification used in the material is prepared
Agent is MnO2.Modifying agent MnO used in experiment2It is to be occurred made from chemical reaction as potassium permanganate and Manganous sulfate monohydrate.
Embodiment two:
Nine water ferric nitrates are dissolved in deionized water first, are placed on magnetic stirring apparatus, it is molten that sodium hydroxide is added while stirring
PH value is adjusted to 7.0-8.0 by liquid.Suspension is centrifuged, precipitating is collected, is cleaned by ultrasonic 5 times to remove electrolyte, it is dry to be put into air blast
In dry case, ferrihydrite is made in 80 DEG C of dry 6h.Potassium permanganate is dissolved in deionized water, ferrihydrite is added, is placed in magnetic stirring apparatus
On, a certain amount of Manganous sulfate monohydrate is added while stirring, makes the MnO generated2It is 1:1 with the mass ratio that ferrihydrite is added, after
Continuous stirring, gelation 4h.Suspension is centrifuged, supernatant is discarded, with deionized water flushing precipitating 3 times to remove foreign ion,
It is put into air dry oven, 60 DEG C of dry 6h, MnO is made2Modified ferrihydrite sample.Wherein, modification used in the material is prepared
Agent is MnO2.Modifying agent MnO used in experiment2It is to be occurred made from chemical reaction as potassium permanganate and Manganous sulfate monohydrate.
Embodiment three:
Nine water ferric nitrates are dissolved in deionized water first, are placed on magnetic stirring apparatus, it is molten that sodium hydroxide is added while stirring
PH value is adjusted to 7.0-8.0 by liquid.Suspension is centrifuged, precipitating is collected, is cleaned by ultrasonic 5 times to remove electrolyte, it is dry to be put into air blast
In dry case, ferrihydrite is made in 80 DEG C of dry 6h.Potassium permanganate is dissolved in deionized water, ferrihydrite is added, is placed in magnetic stirring apparatus
On, a certain amount of Manganous sulfate monohydrate is added while stirring, makes the MnO generated2It is 2:1 with the mass ratio that ferrihydrite is added, after
Continuous stirring, gelation 4h.Suspension is centrifuged, supernatant is discarded, with deionized water flushing precipitating 3 times to remove foreign ion,
It is put into air dry oven, 60 DEG C of dry 6h, MnO is made2Modified ferrihydrite sample.Wherein, modification used in the material is prepared
Agent is MnO2.Modifying agent MnO used in experiment2It is to be occurred made from chemical reaction as potassium permanganate and Manganous sulfate monohydrate.
Claims (3)
1. a kind of MnO2Modified ferrihydrite adsorbing material and preparation method thereof, this method comprises the following steps:
(1) preparation of ferrihydrite
Nine water ferric nitrates are dissolved in deionized water, is placed on magnetic stirring apparatus, sodium hydroxide solution is added while stirring, by pH value
It is adjusted to 7.0-8.0.Suspension is centrifuged, precipitating is collected, is cleaned by ultrasonic 5 times to remove electrolyte, is put into air dry oven, 80
DEG C dry 6h, is made ferrihydrite.
(2)MnO2The preparation of modified ferrihydrite
Potassium permanganate is dissolved in deionized water, ferrihydrite is added, is placed on magnetic stirring apparatus, a certain amount of one is added while stirring
Hydrated manganese sulfate makes the manganese dioxide generated and the mass ratio of ferrihydrite is added to be respectively 1:2,1:1 and 2:1, continue to stir, coagulates
Gelatinization 4h.Suspension is centrifuged, supernatant is discarded, precipitating is rinsed 3 times to remove foreign ion with deionized water, it is dry to be put into air blast
In dry case, MnO is made in 60 DEG C of dry 6h2Modified ferrihydrite sample.
2. a kind of MnO according to claim 12Modified ferrihydrite adsorbing material and preparation method, it is characterised in that: system
Modifying agent used in the standby material is manganese dioxide.
3. a kind of MnO according to claim 12Modified ferrihydrite adsorbing material and preparation method, it is characterised in that: real
Modifying agent manganese dioxide used in testing is occurred made from chemical reaction as potassium permanganate and Manganous sulfate monohydrate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573882A (en) * | 2020-04-16 | 2020-08-25 | 中南大学 | Process for deeply removing heavy metals in water body |
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| CN101905910A (en) * | 2009-06-05 | 2010-12-08 | 中国科学院生态环境研究中心 | Reactor for removing arsenic in water on basis of iron-based composite oxide |
| CN103212364A (en) * | 2013-04-28 | 2013-07-24 | 武汉理工大学 | Ferro-manganese composite oxide as well as preparation method and application thereof in removing arsenic in water |
| CN106732444A (en) * | 2016-11-28 | 2017-05-31 | 桂林奥尼斯特节能环保科技有限责任公司 | A kind of method processed stibium-containing wastewater except antimony sorbing material and preparation method thereof and using it |
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2018
- 2018-11-14 CN CN201811355788.2A patent/CN109453734A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905910A (en) * | 2009-06-05 | 2010-12-08 | 中国科学院生态环境研究中心 | Reactor for removing arsenic in water on basis of iron-based composite oxide |
| CN103212364A (en) * | 2013-04-28 | 2013-07-24 | 武汉理工大学 | Ferro-manganese composite oxide as well as preparation method and application thereof in removing arsenic in water |
| CN106732444A (en) * | 2016-11-28 | 2017-05-31 | 桂林奥尼斯特节能环保科技有限责任公司 | A kind of method processed stibium-containing wastewater except antimony sorbing material and preparation method thereof and using it |
Non-Patent Citations (3)
| Title |
|---|
| LIYING JIANG等: ""Removal behavior and mechanism of Co(II) on the surface of Fe–Mnbinary oxide adsorbent"", 《COLLOIDS AND SURFACES A: PHYSICOCHEMICAL AND ENGINEERING ASPECTS》 * |
| 王华伟等: ""pH 和络合剂对五价锑在水钠锰矿和水铁矿表面吸附行为的影响"", 《环境科学》 * |
| 王楠: ""铁锰氧化物对砷的吸附和氧化特性研究"", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573882A (en) * | 2020-04-16 | 2020-08-25 | 中南大学 | Process for deeply removing heavy metals in water body |
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