CN106311162A - Preparation method and application of chitosan-modified mesoporous diatom - Google Patents
Preparation method and application of chitosan-modified mesoporous diatom Download PDFInfo
- Publication number
- CN106311162A CN106311162A CN201610845614.9A CN201610845614A CN106311162A CN 106311162 A CN106311162 A CN 106311162A CN 201610845614 A CN201610845614 A CN 201610845614A CN 106311162 A CN106311162 A CN 106311162A
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- China
- Prior art keywords
- diatom
- chitosan
- modified mesoporous
- preparation
- mesoporous
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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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- 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
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
- C02F2101/103—Arsenic compounds
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method and application of chitosan-modified mesoporous diatom. The preparation method comprises the following steps: firstly, weighing 2.5 to 3g of chitosan, adding into 50mL of acetic acid solution with the mass percent concentration of 4 to 4.5 percent; secondly, stirring at the rotating speed of 200 to 230r/min for 1 to 1.5 hours under the condition of room temperature, and enabling the chitosan to be completely dissolved; thirdly, adding 4.5 to 5g of mesoporous diatomite, and continuously stirring for 1 to 1.5 hours to obtain a uniform colloid mixing solution; putting the prepared colloid mixing solution in a drying oven with the temperature of 100 to 105DEG C for drying, then taking out, grinding, passing through a sieve with 60 meshes, and finishing modification, thus obtaining the chitosan-modified mesoporous diatom. The chitosan-modified mesoporous diatom prepared by the preparation method disclosed by the invention can be used as an adsorbent and is used for removing pentavalent arsenic ions in sewage. The method disclosed by the invention is simple in operation, low in cost and easy for large-scale popularization and application; in addition, the prepared chitosan-modified mesoporous diatom has a good effect of removing the pentavalent arsenic ions in the sewage, and can be used for remarkably reducing the concentration of the pentavalent arsenic ions in the sewage.
Description
Technical field
The invention belongs to absorption method and remove heavy metal field in sewage, particularly to a kind of chitin modified mesoporous diatom
Preparation method and applications.
Background technology
Kieselguhr is a kind of biogenic silicastone, mainly by the deposition of the siliconized consolidation of Diatomeae remains
Ore deposit, there is bigger serface, pore passage structure is regular, aperture is big and homogeneous, hole wall is appropriate, stabilization of bony shelf structure, be prone to modify, high
The features such as adsorption capacity, mechanical stability and hydrothermal stability are preferable, chemical constitution makes it be weak solid acid, can occur with alkali
Reaction, diatom surface and micropore have a large amount of silicone hydroxyl and hydrogen bond, make diatom have absorption property.Chitosan is that unique alkalescence is natural
Polysaccharide, nontoxic, there is stronger hygroscopicity and moisture retention, be readily biodegradable, containing a large amount of free amine group (-NH on strand2)、
Hydroxyl (-OH), is easily formed intramolecular and intermolecular hydrogen bonding, can form stable compound with many heavy metal ion etc..The present invention
With mesoporous diatom as raw material, after process of refinement, obtain mesoporous diatomite, with essence soil as matrix, with chitosan, it is entered
Row modification, modified mesoporous diatom is to the As(V in sewage) there is good removal effect.
Summary of the invention
It is an object of the invention to provide the preparation method and applications of a kind of chitin modified mesoporous diatom.
The present invention prepares concretely comprising the following steps of chitin modified mesoporous diatom:
(1) weigh 2.5 ~ 3g chitosan, join in the acetic acid solution that 50 mL mass percent concentrations are 4 ~ 4.5%, then exist
Under room temperature condition, stir 1 ~ 1.5h with the rotating speed of 200 ~ 230r/min, make chitosan all dissolve, add 4.5 ~ 5g subsequently and be situated between
Hole diatomite, continues stirring 1 ~ 1.5h, prepares homogeneous colloidal mixed liquor.
(2) the homogeneous colloidal mixed liquor that step (1) prepares is placed in the baking oven of 100 ~ 105 DEG C drying, then takes out
Grind, cross 60 mesh sieves, i.e. complete modification, prepare chitin modified mesoporous diatom.
The chitin modified mesoporous diatom that the present invention prepares can as adsorbent, for remove pentavalent arsenic in sewage from
Son.
The method of the present invention is simple to operate, with low cost, it is easy to large-scale promotion application, and chitin modified Jie prepared
Pentavalent arsenic ion in sewage is played good removal effect by hole diatom, it is possible to significantly reduce the dense of pentavalent arsenic ion in sewage
Degree.
Accompanying drawing explanation
Fig. 1 is the SEM figure of mesoporous diatomite used by the embodiment of the present invention.
Fig. 2 is the SEM figure of chitin modified mesoporous diatom prepared by the embodiment of the present invention.
Detailed description of the invention
Embodiment:
(1) weigh 2.5g chitosan, join in the acetic acid solution that 50 mL mass percent concentrations are 4%, then at room temperature bar
Under part, stir 1h with the rotating speed of 200r/min, in the case of rotating speed is 200r/min, stir 1h with electronic stirrer, make shell gather
Sugar all dissolves, and adds the mesoporous diatomite of 5g subsequently, continues stirring 1h, prepares homogeneous colloidal mixed liquor.
(2) the homogeneous colloidal mixed liquor that step (1) prepares is placed in the baking oven of 105 DEG C drying, then takes out grinding,
Cross 60 mesh sieves, i.e. complete modification, prepare chitin modified mesoporous diatom.
Use the pentavalent arsenic solion that chitin modified mesoporous diatom concentration for the treatment of is 2mg/L that the present embodiment prepares,
To the clearance of pentavalent arsenic ion up to more than 94% when dosage is 3g/L, effect of removing arsenic is notable.
Claims (2)
1. the preparation method of a chitin modified mesoporous diatom, it is characterised in that concretely comprise the following steps:
(1) weigh 2.5 ~ 3g chitosan, join in the acetic acid solution that 50 mL mass percent concentrations are 4 ~ 4.5%, then exist
Under room temperature condition, stir 1 ~ 1.5h with the rotating speed of 200 ~ 230r/min, make chitosan all dissolve, add 4.5 ~ 5g subsequently and be situated between
Hole diatomite, continues stirring 1 ~ 1.5h, prepares homogeneous colloidal mixed liquor；
(2) the homogeneous colloidal mixed liquor that step (1) prepares is placed in the baking oven of 100 ~ 105 DEG C drying, then takes out grinding,
Cross 60 mesh sieves, i.e. complete modification, prepare chitin modified mesoporous diatom.
2. the application of chitin modified mesoporous diatom prepared by a preparation method as claimed in claim 1, it is characterised in that
This chitin modified mesoporous diatom is used as adsorbent, for removing the pentavalent arsenic ion in sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610845614.9A CN106311162A (en) | 2016-09-26 | 2016-09-26 | Preparation method and application of chitosan-modified mesoporous diatom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610845614.9A CN106311162A (en) | 2016-09-26 | 2016-09-26 | Preparation method and application of chitosan-modified mesoporous diatom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106311162A true CN106311162A (en) | 2017-01-11 |
Family
ID=57819896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610845614.9A Pending CN106311162A (en) | 2016-09-26 | 2016-09-26 | Preparation method and application of chitosan-modified mesoporous diatom |
Country Status (1)
| Country | Link |
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| CN (1) | CN106311162A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824131A (en) * | 2017-03-01 | 2017-06-13 | 辽宁大学 | A kind of chitosan-modified mesoporous material and its preparation method and application |
| CN108946729A (en) * | 2018-08-17 | 2018-12-07 | 江苏师范大学 | A kind of preparation method of chitosan/gelatin carbon nanotube skeleton absorbent charcoal material |
| CN110201648A (en) * | 2019-06-09 | 2019-09-06 | 桂林理工大学 | A kind of diatomite surface A s(V) ion blotting adsorbent material preparation method |
| CN110201649A (en) * | 2019-06-09 | 2019-09-06 | 桂林理工大学 | A kind of diatomite surface A s(III) ion blotting adsorbent material preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058426A (en) * | 2007-04-13 | 2007-10-24 | 沈阳化工学院 | Environment-friendly modified bentonite and preparation method thereof |
| CN105289544A (en) * | 2015-11-22 | 2016-02-03 | 桂林理工大学 | Preparation method of adsorbent for removing As<5+> |
-
2016
- 2016-09-26 CN CN201610845614.9A patent/CN106311162A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058426A (en) * | 2007-04-13 | 2007-10-24 | 沈阳化工学院 | Environment-friendly modified bentonite and preparation method thereof |
| CN105289544A (en) * | 2015-11-22 | 2016-02-03 | 桂林理工大学 | Preparation method of adsorbent for removing As<5+> |
Non-Patent Citations (1)
| Title |
|---|
| 张琳等: "硅藻土负载壳聚糖对含Cr( VI) 废水吸附处理效能", 《上海工程技术大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824131A (en) * | 2017-03-01 | 2017-06-13 | 辽宁大学 | A kind of chitosan-modified mesoporous material and its preparation method and application |
| CN106824131B (en) * | 2017-03-01 | 2019-04-09 | 辽宁大学 | A kind of chitosan-modified mesoporous material and its preparation method and application |
| CN108946729A (en) * | 2018-08-17 | 2018-12-07 | 江苏师范大学 | A kind of preparation method of chitosan/gelatin carbon nanotube skeleton absorbent charcoal material |
| CN110201648A (en) * | 2019-06-09 | 2019-09-06 | 桂林理工大学 | A kind of diatomite surface A s(V) ion blotting adsorbent material preparation method |
| CN110201649A (en) * | 2019-06-09 | 2019-09-06 | 桂林理工大学 | A kind of diatomite surface A s(III) ion blotting adsorbent material preparation method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170111 |
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