CN108579658A - The adsorbent of dichromate ion in a kind of removal waste water - Google Patents
The adsorbent of dichromate ion in a kind of removal waste water Download PDFInfo
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- CN108579658A CN108579658A CN201810368707.6A CN201810368707A CN108579658A CN 108579658 A CN108579658 A CN 108579658A CN 201810368707 A CN201810368707 A CN 201810368707A CN 108579658 A CN108579658 A CN 108579658A
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- adsorbent
- waste water
- ion
- dichromate ion
- calcium iron
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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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
- B01J20/0229—Compounds of Fe
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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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0248—Compounds of B, Al, Ga, In, Tl
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
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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
- B01J20/28014—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
- B01J20/28016—Particle form
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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
-
- 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)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention provides one kind being based on calcium iron binary hydrotalcite as adsorbent, and the method for dichromate ion in Adsorption waste water, wherein calcium iron ratio are (2 4):1.Calcium iron binary hydrotalcite adsorbs the amount of dichromate ion up to (141 562) mg/g.At ambient temperature, it is (0.3 6) by the mass ratio of contained dichromate ion in adsorbent and waste water：The adsorbent is added in the waste water solution containing dichromate ion by 1 ratio, stirs 1h, so that it may to reach adsorption equilibrium.This method has the advantages that simple for process, operation is easy, efficiency-cost ratio is high, it is shown that huge application potential and larger economic value.
Description
Technical field
The present invention relates to water-treatment technology fields, and in particular to calcium iron binary neatly masonry adsorbent is removed weight in waste water
The application of chromate ion.
Background technology
Chromium is manufactured and is applied in every field as one of most important metal in modern industry extensively.The poison of chromium
Property is related with its valence state, and the toxicity of Cr VI is 100 times higher than trivalent chromium, and Cr VI compared to trivalent chromium be more prone to by
Absorption of human body is simultaneously accumulated in human body.Correlative study shows harm position of the pollution to the mankind of the oxygen-containing acid group waste water of heavy metal chromium
Second is occupied, lead is only second to.The primary pollution source of dichromate ion waste water is that mining is smelted, electro-forge, alloy manufacture, pigment is printed and dyed,
Turn industries, especially the pigment factories such as leather glue print, the pollution for the oxygen-containing acid group of heavy metal that chrome yellow prepares industry generation seems particularly prominent
Go out.The unordered discharge of the waste water containing dichromate ion can seriously threaten people's health.Therefore, efficient, cheap processing is developed to contain
The technology of dichromate ion waste water is very necessary.
The method of processing waste water containing chrome has chemical precipitation method, ion-exchange, chemical reduction method, membrane separation process and suction at present
Attached method etc..The basic principle of chemical precipitation method is that the heavy metal ion of solubilised state is become small of solubility by chemical reaction
Grain state achievees the purpose that purify waste water using modes such as precipitation, filterings.It can be by chemical precipitation method according to the difference of chemical agent
It is divided into neutralization precipitation method, flocculent precipitation, sulphide precipitation, the barium salt precipitation method, ferrite coprecipitation etc..Ion-exchange
It is that ion exchange occurs with heavy metal ions in wastewater and oxygen-containing acid group using the ion in ion exchange resin and reaches purification
The method of waste water.Chemical reduction method is that the oxygen-containing acid group of heavy metal is converted into precipitation or poison by the way that reducing agent is added into waste water
The smaller form of property.Membrane separation process is the method for playing purification waste water by intercepting the ingredient of Pollutants in Wastewater by filter membrane,
Membrane separation process includes diffusion dialysis, point dialysis, reverse osmosis and ultrafiltration etc..Absorption method refers to the active group by adsorbent surface
Achieve the purpose that purifying water body with effective combine of heavy metal contaminants.Relative to preceding four kinds of methods, absorption method is due to equipment letter
The advantages that single, operation is easy, efficiency-cost ratio is high, reproducible utilization is widely studied and applies in water treatment field.
It is old it is green et al. have studied adsorption effect of the chicken feather keratin auxiliary agent to dichromate ion, to dichromate ion
Adsorption rate reached 92.5% (absorption property of old green, Chen Ju, Wang Xue swallow the chicken feather keratins auxiliary agent to dichromate ion
Study [J] application chemical industry, 201039 (7), 1055-1058).There are the adsorption energy force difference of unit adsorbent, dichromic acids for this method
Radical ion recycles relatively difficult problem, is not well positioned to meet the requirement of commercial Application.
In order to overcome the deficiencies in the prior art, the present invention to use a kind of simple and convenient process for preparing, it is only necessary to very in short-term
Between can prepare high-performance adsorbent, the ability of absorption dichromate ion reaches 562mg/g, shows that huge application is latent
It can be with larger economic value.
Invention content
The purpose of the present invention is to provide a kind of adsorbents of dichromate ion in removal waste water.
The purpose of the present invention is achieved through the following technical solutions：
A. reaction solution is prepared：The mixed solution of calcium nitrate and ferric nitrate and the mixed solution of sodium nitrate and sodium hydroxide is same
When be added drop-wise in deionized water, wherein in the mixed solution of the calcium nitrate and ferric nitrate calcium ion and iron ion molar ratio
For (2-4):1, nitrate anion and molar ratio hydroxy are 3 in the mixed solution of the sodium nitrate and sodium hydroxide:1；
B. coprecipitation reaction：Above-mentioned reaction solution is controlled with (0.5-20) mL/min rate of addition, the pH of deionized water in 7-
10；
C. then the above-mentioned calcium iron binary hydrotacite suspension of centrifugal concentrating dries bottom precipitation, obtains powdered calcium iron
Binary hydrotalcite；
D. adsorption reaction：Mass ratio by contained dichromate ion in adsorbent and waste water is (0.3-6)：1 ratio, by this
Adsorbent is added in waste water solution, magnetic agitation, and 1h is reacted at a temperature of 25 DEG C and reaches adsorption equilibrium, filters out adsorbent, should
Method is suitable for the waste water aqueous solution of a concentration of (0.05-0.3) M of dichromate ion.
Specifically, described in the waste water of a concentration of (10-12) mg/mL of dichromate ion, add the calcium of (8-10) mg/mL
Iron is preferably than being 2:1 binary hydrotalcite, the maximal absorptive capacity of adsorbent reach 562mg/g.
The method that the present invention is combined by physics with chemical action, the ratio by preparing calcium and ferro element are (2-4)：1
CaFe-LDHs, realize dichromate ion in maximum Adsorption water body.
Specific implementation mode
1. preparing CaFe-LDHs
(1) ferric nitrate of the calcium nitrate of 26.25g and 32.32g is dissolved into the carbon dioxide removal deionized water of 200mL,
It is named as solution A.The sodium hydroxide of the sodium nitrate of 25.5g and 4g is dissolved into the carbon dioxide removal deionized water of 200mL, is ordered
Entitled solution B.Solution A and solution B are added drop-wise in the deionized water of carbon dioxide removal simultaneously with the speed of 0.5mL/min, shape
The pH of deionized water is remained at (7 ± 0.3), is added dropwise by adjusting the rate of addition of solution A and solution B at reaction solution
Complete crystallization 6h at ambient temperature, centrifugal drying obtain powdered Ca2Fe-LDHs。
(2) ferric nitrate of the calcium nitrate of 52.51g and 32.32g is dissolved into the carbon dioxide removal deionized water of 200mL,
It is named as solution A.The sodium hydroxide of the sodium nitrate of 25.5g and 4g is dissolved into the carbon dioxide removal deionized water of 200mL, is ordered
Entitled solution B.Solution A and solution B are added drop-wise in the deionized water of carbon dioxide removal simultaneously with the speed of 20mL/min, formed
The pH of deionized water is remained at (10 ± 0.3), is added dropwise by adjusting the rate of addition of solution A and solution B by reaction solution
Complete crystallization 6h at ambient temperature, centrifugal drying obtain powdered Ca4Fe-LDHs。
2. the absorption property of dichromate ion is tested
(1) by the Ca of 12.96g4In the deionized water of the carbon dioxide removal of the 200mL of Fe-LDHs dispersions, it is mixed equal
Even, the content that dichromate ion is then added is the potassium bichromate of 2.16g, after mixing, after stirring 1h, it is clear that upper layer is obtained by filtration
Liquid, the absorbance value that remaining dichromate ion in waste water is measured using spectrophotometric calculate calcium by converting accordingly
Iron binary hydrotalcite adsorbs the amount of dichromate ion, Ca when being computed balance4The amount of the absorption dichromate ion of Fe-LDHs is
141mg/g。
(2) by the Ca of 3.89g2In the deionized water of the carbon dioxide removal of the 200mL of Fe-LDHs dispersions, it is mixed equal
Even, the content that dichromate ion is then added is the potassium bichromate of 12.96g, after mixing, after stirring 1h, upper layer is obtained by filtration
Clear liquid, the absorbance value that remaining dichromate ion in waste water is measured using spectrophotometric are calculated by converting accordingly
Calcium iron binary hydrotalcite adsorbs the amount of dichromate ion, Ca when being computed balance2The amount of the absorption dichromate ion of Fe-LDHs is
562mg/g。
(3) by the Ca of 1.9g2In the deionized water of the carbon dioxide removal of the 200mL of Fe-LDHs dispersions, it is mixed equal
Even, the content that dichromate ion is then added is the potassium bichromate of 2.1g, after mixing, after stirring 1h, it is clear that upper layer is obtained by filtration
Liquid, the absorbance value that remaining dichromate ion in waste water is measured using spectrophotometric calculate calcium by converting accordingly
Iron binary hydrotalcite adsorbs the amount of dichromate ion, Ca when being computed balance2The amount of the absorption dichromate ion of Fe-LDHs is
562mg/g。
The foregoing is merely presently preferred embodiments of the present invention, is not intended to restrict the invention, it is all the present invention spirit and
Any modification, equivalent substitution, improvement and etc. done within principle, should all be included in the protection scope of the present invention.
Claims (5)
1. the adsorbent of thiocyanate ion in a kind of removal waste water, which is characterized in that include the following steps：Using co-precipitation
Method prepares adsorbent；Mass ratio by contained dichromate ion in adsorbent and waste water is (0.3-6)：1 ratio, by this
Adsorbent is added in waste water solution, magnetic agitation, and reaction stirring 1h, filters out adsorbent at a temperature of 25 DEG C, using light splitting light
The absorbance value of remaining dichromate ion calculates calcium iron binary hydrotalcite by converting accordingly in degree measurement waste water
Adsorb the amount of dichromate ion.
2. adsorbent according to claim 1, which is characterized in that adsorbent is calcium iron binary hydrotalcite.
3. the calcium iron binary hydrotalcite belonging to claim 2, which is characterized in that calcium iron ratio can be 2:1、3:1 or 4:1.
4. the calcium iron binary hydrotalcite belonging to claim 2, which is characterized in that intercalating ions are nitrate ion.
5. thiocyanate ion according to claim 1, which is characterized in that dichromate ion is detectable dense in waste water
Spend ranging from (0.05-0.3) M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810368707.6A CN108579658A (en) | 2018-04-23 | 2018-04-23 | The adsorbent of dichromate ion in a kind of removal waste water |
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| CN201810368707.6A CN108579658A (en) | 2018-04-23 | 2018-04-23 | The adsorbent of dichromate ion in a kind of removal waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847703A (en) * | 2019-01-14 | 2019-06-07 | 中国环境科学研究院 | A kind of sodium secondary alkyl sulfonate modified hydrotalcite adsorbent and its preparation method and application |
| CN115814753A (en) * | 2022-11-30 | 2023-03-21 | 中国科学院东北地理与农业生态研究所 | Preparation method of iron-calcium layered double hydroxide phosphorus removal agent |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359792A (en) * | 2013-07-22 | 2013-10-23 | 中国科学院青海盐湖研究所 | MgFe binary hydrotalcite-like compound with high iron content and preparation method thereof |
| CN107252674A (en) * | 2017-07-21 | 2017-10-17 | 中国环境科学研究院 | A kind of dephosphorization agent based on ferronickel binary hydrotalcite |
-
2018
- 2018-04-23 CN CN201810368707.6A patent/CN108579658A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359792A (en) * | 2013-07-22 | 2013-10-23 | 中国科学院青海盐湖研究所 | MgFe binary hydrotalcite-like compound with high iron content and preparation method thereof |
| CN107252674A (en) * | 2017-07-21 | 2017-10-17 | 中国环境科学研究院 | A kind of dephosphorization agent based on ferronickel binary hydrotalcite |
Non-Patent Citations (2)
| Title |
|---|
| 夏威 等，: ""一种多孔羟基氧化铁的制备及其电化学性能研究"", 《中国稀土学报》 * |
| 王红: ""氧化铁纳米材料的可控合成研究"", 《吉林大学博士学位论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847703A (en) * | 2019-01-14 | 2019-06-07 | 中国环境科学研究院 | A kind of sodium secondary alkyl sulfonate modified hydrotalcite adsorbent and its preparation method and application |
| CN115814753A (en) * | 2022-11-30 | 2023-03-21 | 中国科学院东北地理与农业生态研究所 | Preparation method of iron-calcium layered double hydroxide phosphorus removal agent |
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