CN108128834A - A kind of chromium adsorbent and its preparation method and application - Google Patents
A kind of chromium adsorbent and its preparation method and application Download PDFInfo
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- CN108128834A CN108128834A CN201711266273.0A CN201711266273A CN108128834A CN 108128834 A CN108128834 A CN 108128834A CN 201711266273 A CN201711266273 A CN 201711266273A CN 108128834 A CN108128834 A CN 108128834A
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- haydite
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/0072—Heat treatment
-
- 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
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention relates to a kind of chromium adsorbents and its preparation method and application, belong to water-treatment technology field.The present invention adsorbent be modified by using different acid-base pair ceramsite materials it is obtained, it can come into full contact with reaction solution, with higher absorption property, the low concentration Cr VI in waste water can be effectively removed, and it is at low cost, method of modifying is simple, haydite is cheap and easy to get, is suitble to large-scale industrial production.
Description
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of chromium adsorbent and its preparation method and application.
Background technology
The existence form of chromium is mainly trivalent and sexavalence in nature.Wherein, Cr（VI）There is higher oxidisability and carcinogenic
Property, compound are unable to natural degradation, can gather in vivo, and toxicity is Cr（III）More than 100 times.Chromium moves in water body
Moving transform mode mainly has hydrolysis, absorption, precipitation, redox and complexing.Existing removal Cr（VI）Method have very much, packet
Include absorption method, chemical precipitation method, ion-exchange, bioanalysis etc..
Absorption method mainly, as adsorbent, is inhaled by the use of with insoluble and high specific surface area solid material using chemistry
Heavy metal adsorption in water body in adsorbent surface, is achieved the purpose that removing heavy metals by the mechanism such as attached, physical absorption.Absorption method
It is easy to operate, pollution is small and most of adsorbent is reusable.Common adsorbent mainly has：Activated carbon, sepiolite, oxygen
Change aluminium and some biological adsorption agents etc., but it is to Cr（VI）Concentration requirement be typically larger than 10mg/L, the suction to low concentrations of chromium
Attached effect is poor.
Ceramsite material inner structural features are in fine and closely woven cellular micropore, these micropores are all case type rather than communicate-types
's.It is formed since gas is wrapped into shell, haydite has light characteristic.In addition, haydite is with huge
Specific surface area, chemically and thermally stability is good.But ceramsite material production process is coarse, and a large amount of impurity, limitation are contained in duct
The combination of heavy metal ion and ceramsite material.Common concern is caused to the research of ceramsite material in recent years, but using haydite
The research for adsorbing heavy metal Cr is also less.
Invention content
The object of the present invention is to provide a kind of chromium adsorbent and its preparation method and application, which is modified haydite,
With preferable absorption property, the Cr in waste water, especially Cr VI can be effectively removed.In addition, method of modifying is simple, haydite is honest and clean
Valency is easy to get, is suitble to large-scale industrial production.
The present invention adopts the following technical scheme that：
A kind of chromium adsorbent, for modified haydite.
A kind of preparation method of above-mentioned chromium adsorbent, includes the following steps：
（1）Haydite is crushed to 40 ~ 120 mesh, adds in methanol, 5 ~ 15min of ultrasound, is filtered by vacuum after standing, in 60 ~ 120 DEG C of conditions
2 ~ 3h of lower drying；
（2）Into sample after drying, the eluant, eluent of a concentration of 0.5 ~ 2mol/L is added in, 5 ~ 15min of ultrasound, vacuum is taken out after elution
Filter, the dry 2-3h under the conditions of 60 ~ 120 DEG C；
（3）Through step（2）Treated, and haydite is placed in Muffle furnace, and 2-3h is roasted under the conditions of 400 ~ 600 DEG C, is ground after taking-up
To 40 ~ 120 mesh to get modified haydite.
In preparation method, the step（1）In haydite be lytag, leca, biological sludge haydite and rubbish
One or more of rubbish haydite.
In preparation method, the step（1）In, the mass volume ratio of haydite and methanol is 1 ~ 5g:10mL.
In preparation method, the step（2）In eluant, eluent be HCl, HNO3Or H2SO4。
In preparation method, the step（2）In eluant, eluent be NaOH, Ca (OH)2Or Ba (OH)2。
In preparation method, the step（2）In haydite and eluant, eluent mass volume ratio be 1 ~ 5g:5mL.
A kind of application of above-mentioned chromium adsorbent in waste water is removed in low concentration Cr.
Further, in the waste water Cr a concentration of 0.1 ~ 1mg/L.
Further, Cr is sexavalence in the waste water.
The beneficial effects of the present invention are：The present invention handles ceramsite material with eluant, eluent, because of ceramsite material production process
It is coarse, containing a large amount of impurity in duct, the combination of heavy metal ion and ceramsite material is limited, and after being handled with eluant, eluent,
The impurity for blocking duct is removed, so as to greatly improve adsorption capacity of the haydite to chromium ion；Methanol is mainly used to remove haydite
Interior other metal salt impurities；Roasting is to make to have stable adsorption effect by the haydite that eluant, eluent is handled, remove and easily wave
Component is sent out, improves the mechanical strength of haydite.
Modification haydite prepared by the present invention has preferable absorption property, can effectively remove the Cr in waste water, especially Cr
（VI）.In addition, preparation method of the present invention is simple, condition is easy to get, it is short and at low cost to take, it is suitble to large-scale industrial production, in water
Processing technology field has extraordinary application prospect.
Specific embodiment
In order to make the purpose of the present invention, technical solution and advantage are more clear, the present invention is made below in conjunction with example into
The explanation of one step.Following embodiment is some examples of the present invention, is not whole.Based on the example of the present invention, this field
Other staff obtain other examples under the premise of creative work is not made, belong to protection scope of the present invention it
It is interior.
Embodiment 1
The preparation of chromium adsorbent：
Lytag is crushed to 40 mesh, adds in methanol, solid-to-liquid ratio 1g:10mL.It is ultrasonic under Ultrasonic Conditions
5min is filtered by vacuum after standing and dry, sample after drying is placed in beaker, adds in the HCl of a concentration of 1mol/L, solid-to-liquid ratio
1g:5mL, vacuum filtration and the dry 2h at 110 DEG C after elution, then be put into Muffle furnace and roast 3h under the conditions of 500 DEG C, it grinds
40 mesh are milled to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 0.6mg/L, is measured and inhaled using heavy metal multi-parameter
Chromium concn in attached waste water, be computed chromium removal efficiency be 94.34%.
Embodiment 2
The preparation of chromium adsorbent：
Lytag is crushed to 60 mesh, adds in methanol, solid-to-liquid ratio 1g:5mL.The ultrasound 10min under Ultrasonic Conditions,
It is filtered by vacuum after standing and dry, sample after drying is placed in beaker, adds in the Ba (OH) of a concentration of 0.5mol/L2, solid-liquid
Compare 2g:5mL, vacuum filtration and the dry 2h at 60 DEG C after elution, then be put into Muffle furnace and roast 3h under the conditions of 550 DEG C,
60 mesh are ground to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 0.6mg/L, is measured and inhaled using heavy metal multi-parameter
Chromium concn in attached waste water, be computed chromium removal efficiency be 96.42%.
Embodiment 3
The preparation of chromium adsorbent：
Leca is crushed to 100 mesh, adds in methanol, solid-to-liquid ratio 3g:10mL.The ultrasound 5min under Ultrasonic Conditions,
It is filtered by vacuum after standing and dry, sample after drying is placed in beaker, adds in the NaOH of a concentration of 0.5mol/L, solid-to-liquid ratio
1g:5mL, vacuum filtration and the dry 2h at 110 DEG C after elution, then be put into Muffle furnace and roast 2h under the conditions of 500 DEG C,
100 mesh are ground to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 1mg/L, is measured and adsorbed using heavy metal multi-parameter
Chromium concn in waste water afterwards, be computed the removal efficiency of chromium is divided into 92.24%.
Embodiment 4
The preparation of chromium adsorbent：
Biological sludge haydite is crushed to 120 mesh, adds in methanol, solid-to-liquid ratio 2g:5mL.It is ultrasonic under Ultrasonic Conditions
10min is filtered by vacuum after standing and dry, sample after drying is placed in beaker, adds in the HNO of a concentration of 2mol/L3, solid-liquid
Compare 2g:5mL, vacuum filtration and the dry 2h at 90 DEG C after elution, then be put into Muffle furnace and roast 2h under the conditions of 600 DEG C,
120 mesh are ground to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 1mg/L, is measured and adsorbed using heavy metal multi-parameter
Chromium concn in waste water afterwards, be computed chromium removal efficiency be 87.62%.
Embodiment 5
The preparation of chromium adsorbent：
Garbage ceramsites are crushed to 60 mesh, add in methanol, solid-to-liquid ratio 1g:2mL.Ultrasound 15min, quiet under Ultrasonic Conditions
Vacuum filtration and drying are postponed, sample after drying is placed in beaker, adds in the Ca (OH) of a concentration of 1mol/L2, solid-to-liquid ratio 1g:
5mL, vacuum filtration and the dry 2h at 100 DEG C after elution, then be put into Muffle furnace and roast 2.5h under the conditions of 500 DEG C, it grinds
60 mesh are milled to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 0.5mg/L, is measured and inhaled using heavy metal multi-parameter
Chromium concn in attached waste water, be computed chromium removal efficiency be 85.17%.
Embodiment 6
The preparation of chromium adsorbent：
Garbage ceramsites are crushed to 100 mesh, add in methanol, solid-to-liquid ratio 1g:2mL.The ultrasound 10min under Ultrasonic Conditions,
It is filtered by vacuum after standing and dry, sample after drying is placed in beaker, adds in the H of a concentration of 0.5mol/L2SO4, solid-to-liquid ratio
1g:5mL, vacuum filtration and the dry 3h at 110 DEG C after elution, then be put into Muffle furnace and roast 2.5h under the conditions of 550 DEG C,
100 mesh are ground to up to modified haydite.
The application of chromium adsorbent：
Adsorbent is added in the chromate waste water that initial concentration is 0.5mg/L, is measured and inhaled using heavy metal multi-parameter
Chromium concn in attached waste water, be computed chromium removal efficiency be 86.23%.
Comparative example 1
Haydite pre-processes：Commercially available lytag, leca, biological sludge haydite, garbage ceramsites are crushed to 60 mesh respectively,
Dry 2h is to get pretreated haydite at 100 DEG C.
The application of chromium adsorbent：
Each 1g of pretreated four kinds of haydites is taken to be added to respectively in the chromate waste water that initial concentration is 0.6mg/L, using a huge sum of money
Belong to multi-parameter and measure after absorption chromium concn in waste water, be computed chromium removal efficiency be 32.2%, 30.5%, 27.0%,
33.5%。
Comparative example 2
Haydite pre-processes：Commercially available lytag, leca, biological sludge haydite, garbage ceramsites are crushed to 60 mesh respectively,
According to the solid-to-liquid ratio 1 of haydite and methanol:10(g:ML) metal salt impurities various in haydite are dissolved, it is ultrasonic under Ultrasonic Conditions
10min, vacuum filtration and the dry 2h at 100 DEG C after standing.It is put into again in Muffle furnace and roasts 3h under the conditions of 500 DEG C, grind
To 60 mesh up to pretreated haydite.
The application of chromium adsorbent：
Each 1g of pretreated four kinds of haydites is taken to be added to respectively in the chromate waste water that initial concentration is 0.6mg/L, using a huge sum of money
Belong to multi-parameter and measure after absorption chromium concn in waste water, be computed chromium removal efficiency be 57.2%, 53.4%, 55.1%,
50.3%。
Comparative example 3
Haydite pre-processes：Commercially available lytag, leca, biological sludge haydite, garbage ceramsites are crushed to 60 mesh respectively,
The dry 2h at 100 DEG C.Sample after drying is placed in beaker, adds in the HCl of 1mol/L so that the solid-to-liquid ratio of haydite and HCl
It is 1:5(g:ML), then it is put into Muffle furnace and roasts 3h under the conditions of 500 DEG C, is ground to 60 mesh up to pretreated haydite.
The application of chromium adsorbent：
Each 1g of pretreated four kinds of haydites is taken to be added to respectively in the chromate waste water that initial concentration is 0.6mg/L, using a huge sum of money
Belong to multi-parameter and measure after absorption chromium concn in waste water, be computed chromium removal efficiency be 52.2%, 59.5%, 61.1%,
53.8%。
Comparative example 4
Haydite pre-processes：Commercially available lytag, leca, biological sludge haydite, garbage ceramsites are crushed to 20 mesh respectively,
According to the solid-to-liquid ratio 1 of haydite and methanol:10(g:ML) metal salt impurities various in haydite are dissolved, it is ultrasonic under Ultrasonic Conditions
10min, vacuum filtration and the dry 2h at 100 DEG C after standing.Sample after drying is placed in beaker, adds in the HCl of 1mol/L,
So that the solid-to-liquid ratio of haydite and HCl are 1:5(g:ML), then it is put into Muffle furnace and roasts 3h under the conditions of 500 DEG C, is ground to 20 mesh
Up to pretreated haydite.
The application of chromium adsorbent：
Each 1g of pretreated four kinds of haydites is taken to be added to respectively in the chromate waste water that initial concentration is 0.6mg/L, using a huge sum of money
Belong to multi-parameter and measure after absorption chromium concn in waste water, be computed chromium removal efficiency be 72.2%, 67.5%, 63.8%,
72.9%。
Claims (10)
1. a kind of chromium adsorbent, which is characterized in that it is modified haydite.
2. the preparation method of chromium adsorbent as described in claim 1, which is characterized in that it includes the following steps：
（1）Haydite is crushed to 40 ~ 120 mesh, adds in methanol, 5 ~ 15min of ultrasound, is filtered by vacuum after standing, in 60 ~ 120 DEG C of conditions
2 ~ 3h of lower drying；
（2）Into sample after drying, the eluant, eluent of a concentration of 0.5 ~ 2mol/L is added in, 5 ~ 15min of ultrasound, vacuum is taken out after elution
Filter, the dry 2-3h under the conditions of 60 ~ 120 DEG C；
（3）Through step（2）Treated, and haydite is placed in Muffle furnace, and 2-3h is roasted under the conditions of 400 ~ 600 DEG C, is ground after taking-up
To 40 ~ 120 mesh to get modified haydite.
3. preparation method according to claim 2, which is characterized in that the step（1）In haydite for lytag,
One or more of leca, biological sludge haydite and garbage ceramsites.
4. preparation method according to claim 2, which is characterized in that the step（1）In, the mass body of haydite and methanol
Product is than being 1 ~ 5g:10mL.
5. preparation method according to claim 2, which is characterized in that the step（2）In eluant, eluent be HCl, HNO3Or
H2SO4。
6. preparation method according to claim 2, which is characterized in that the step（2）In eluant, eluent be NaOH, Ca
(OH)2Or Ba (OH)2。
7. preparation method according to claim 2, which is characterized in that the step（2）In haydite and eluant, eluent matter
Amount volume ratio is 1 ~ 5g:5mL.
8. a kind of application of chromium adsorbent as described in claim 1 in waste water is removed in low concentration Cr.
9. application according to claim 8, which is characterized in that a concentration of 0.1 ~ 1mg/L of Cr in the waste water.
10. application according to claim 9, which is characterized in that Cr is sexavalence in the waste water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711266273.0A CN108128834B (en) | 2017-12-05 | 2017-12-05 | Chromium adsorbent and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711266273.0A CN108128834B (en) | 2017-12-05 | 2017-12-05 | Chromium adsorbent and preparation method and application thereof |
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| CN108128834B CN108128834B (en) | 2021-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108772039A (en) * | 2018-07-02 | 2018-11-09 | 信阳师范学院 | A kind of preparation method of the magnetic Nano material containing Fe |
| CN110052249A (en) * | 2019-05-23 | 2019-07-26 | 安徽大学 | A kind of process using Chitosan-coated Chromium-containing Wastewater Treatment by Flyash |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106915972A (en) * | 2017-03-13 | 2017-07-04 | 内蒙古科技大学 | A kind of modified coal ash haydite and its preparation method and application |
| CN107413314A (en) * | 2017-07-26 | 2017-12-01 | 河北科技大学 | The preparation method and application of the modified adsorbents of PEI/ZSM 5 of chromium in a kind of removal waste water |
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2017
- 2017-12-05 CN CN201711266273.0A patent/CN108128834B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106915972A (en) * | 2017-03-13 | 2017-07-04 | 内蒙古科技大学 | A kind of modified coal ash haydite and its preparation method and application |
| CN107413314A (en) * | 2017-07-26 | 2017-12-01 | 河北科技大学 | The preparation method and application of the modified adsorbents of PEI/ZSM 5 of chromium in a kind of removal waste water |
Non-Patent Citations (1)
| Title |
|---|
| 孙浩: "自制污泥基陶粒的表面改性及其在含Cr(VI)废水生物净化方面的应用", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108772039A (en) * | 2018-07-02 | 2018-11-09 | 信阳师范学院 | A kind of preparation method of the magnetic Nano material containing Fe |
| CN108772039B (en) * | 2018-07-02 | 2021-01-01 | 信阳师范学院 | Preparation method of Fe-containing magnetic nano material |
| CN110052249A (en) * | 2019-05-23 | 2019-07-26 | 安徽大学 | A kind of process using Chitosan-coated Chromium-containing Wastewater Treatment by Flyash |
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