CN101088919A - Nanometer iron oxide yellow as water purifying material and its synthesis process and use - Google Patents
Nanometer iron oxide yellow as water purifying material and its synthesis process and use Download PDFInfo
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- CN101088919A CN101088919A CN 200610091462 CN200610091462A CN101088919A CN 101088919 A CN101088919 A CN 101088919A CN 200610091462 CN200610091462 CN 200610091462 CN 200610091462 A CN200610091462 A CN 200610091462A CN 101088919 A CN101088919 A CN 101088919A
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- iron oxide
- oxide yellow
- water purifying
- heavy metal
- purifying material
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Abstract
The present invention is nanometer iron oxide yellow as water purifying material and its synthesis process, and relates to technology of eliminating harmful heavy metal ions from sewage. The nanometer iron oxide yellow is prepared through dropping iron salt solution fast into sodium hydroxide solution under well stirring, reaction in a reactor at 100-200 deg.c, cooling to room temperature, washing and drying. It has grain size of 30-50 nm and in quadrangular prism shape. It has high water purifying effect with harmful heavy metal ion eliminating rate near to 100 %, short time of reaching highest purification effect and stable purification effect with desorption.
Description
Technical field
The present invention relates to harmful heavy metal ion cleaning field in the sewage, especially relate to a kind of synthetic method of nanometer iron oxide yellow as water purifying material.
Background technology
Along with the develop rapidly of modern industry, living standards of the people significantly improve at present.But problem of environmental pollution becomes increasingly conspicuous, and wherein the pollution of water surrounding is on the rise especially.According to statistics, the financial loss that China causes because of water pollution every year reaches 40,000,000,000 yuan, and the annual waste water total release in China city is about 41,500,000,000 tons, and wherein trade effluent accounts for 70%, contain waste water such as heavy metal ion and printing and dyeing, biological products and account for about 35% of total amount, be about 14,500,000,000 tons.Therefore the improvement of trade effluent, direct relation China to water resources rationally, make full use of, directly influence the protection of environment and water resources.Heavy-metal pollution has very large harm to the whole ecological system, and has caused the attention of global various countries owing to not being degraded and still having high toxicity under low solubility.
At present, the method of administering heavy metal ion-containing waste water is various, the chemical precipitation method of useful lime or alkali, oxidation reduction process, ion exchange method, ultrafiltration, electrochemical treatment and evaporation recovery etc., these methods cut both ways and limitation, and for reason economically, it is chemical precipitation method that China adopted at present.Yet there are three big shortcomings in chemical precipitation method: the one, and it is very big influenced by pH value, and the optimal ph of different heavy metal ion when generating oxyhydroxide is different, is difficult to definite to all generally suitable pH value of all heavy metal ion.As, need remove the Cd in the aqueous solution
2+, normally the pH value of solution is brought up to more than 11 Cd
2+Just can form oxyhydroxide and be precipitated out, but other heavy metal ion Cr that coexists in the waste water this moment
3+, Zn
2+Might be dissolved in the waste water Deng under this condition; The 2nd, heavy metal ion may with other ion forming complex in the solution, thereby increased its solubleness in water; The 3rd, the throw out that forms under strong alkaline condition wherein has small part because particle is very small and still be suspended in the solution, in discharging process, along with the reduction of pH value will be dissolved in the water again.Therefore, for the waste water that contains contents of many kinds of heavy metal ion, the chemical precipitation method treatment effect is also bad.For this reason, research is run an efficient heavy ion jointly and removed agent, seeks more economical treatment process, and is just particularly important.
Summary of the invention
The present invention prepares nanometer iron oxide yellow as water purifying material, and it is used for sewage purification.
The present invention adopts hydrothermal method synthesis of nano iron oxide yellow purifying agent for polluted water, and detailed process is as follows: iron salt solutions is joined in the NaOH solution fast, after fully stirring, be heated to 100-200 ℃, insulation; After fully reacting, cool to room temperature, washing, drying.
The diameter of the novel sewage purification material of nano iron oxide yellow by the preparation of above method is about 30-50nm, appearance is quadrangular shape pattern.
The nano iron oxide yellow for preparing is applicable to that to containing the sewage purification of heavy metal, bacterium, organism etc. especially the sewage of low concentration solution that contains heavy metal, bacterium, organism etc. is had very strong removal ability, maximum material removal rate is near 100%.
The novel sewage purification material of iron oxide yellow of the present invention is controlled nano iron oxide yellow particulate pattern and detergency ability by accurate control preparation condition.Compare with chemical precipitation method and administer heavy metal ion-containing waste water and other polymer complex sewage purifying agent, nano iron oxide yellow decontamination effect improving of the present invention is obviously superior, can in very short the time, (15 minutes) reach the best purification effect, maximum material removal rate is near 100%, prolongation along with the time, the desorption phenomenon can not occur, decontamination effect improving is very stable.Technology of preparing is simple, equipment requirements is not high, with low cost, and this material is convenient to processing, carries, and is expected to make portable water purification kit, is fit to field usage, can be widely used in military affairs, civilian water purifier field, has a good application prospect.
Description of drawings
Fig. 1 is the scanning electron microscope (a) and transmission electron microscope (b) photo of nano iron oxide yellow.
Fig. 2 removes Cd in the sewage for the nano iron oxide yellow room temperature
2+Efficiency curve.
Embodiment
Example 1: in the beaker of 500ml, 8g NaOH is dissolved in 150ml distilled water changes 11.97gFeCl over to
24H
2O is dissolved in the 125ml separating funnel of packing in the 100ml distilled water.Under the churned mechanically consumingly condition, with FeCl
2Solution is added drop-wise in the NaOH solution fast, and variation has taken place solution colour, continues to stir after three hours, and solution becomes yellow, and product is transferred in 10 25ml teflon-lined autoclaves, and compactedness is 64%, sealing.Under 100 ℃, hydrothermal treatment consists 12h.。After the reaction, reactor is naturally cooled to room temperature.Last yellow mercury oxide is with the washing of distilled water multiple times of filtration, up to the AgNO with 1M
3Detect filtrate and do not have Cl
-Till, obtain the xanchromatic product 40 ℃ of oven dry of baking oven 6 hours.Porphyrize is collected and is promptly got Yellow nanometer iron oxide yellow powder water-purifying material.
Example 2: in the beaker of 500ml, 8g NaOH is dissolved in 150ml distilled water changes 11.97gFeCl over to
24H
2O is dissolved in the 125ml separating funnel of packing in the 100ml distilled water.Under the churned mechanically consumingly condition, with FeCl
2Solution is added drop-wise in the NaOH solution fast, and variation has taken place solution colour, continues to stir after three hours, and solution becomes yellow, and product is transferred in 10 25ml teflon-lined autoclaves, and compactedness is 64%, sealing.Under 160 ℃, hydrothermal treatment consists 12h.。After the reaction, reactor is naturally cooled to room temperature.Last yellow mercury oxide is with the washing of distilled water multiple times of filtration, up to the AgNO with 1M
3Detect filtrate and do not have Cl
-Till, obtain the xanchromatic product 40 ℃ of oven dry of baking oven 6 hours.Porphyrize is collected and is promptly got Yellow nanometer iron oxide yellow powder water-purifying material.
Example 3: in the beaker of 500ml, 8g NaOH is dissolved in 150ml distilled water changes 11.97gFeCl over to
24H
2O is dissolved in the 125ml separating funnel of packing in the 100ml distilled water.Under the churned mechanically consumingly condition, with FeCl
2Solution is added drop-wise in the NaOH solution fast, and variation has taken place solution colour, continues to stir after three hours, and solution becomes yellow, and product is transferred in 10 25ml teflon-lined autoclaves, and compactedness is 64%, sealing.Under 200 ℃, hydrothermal treatment consists 12h.。After the reaction, reactor is naturally cooled to room temperature.Last yellow mercury oxide is with the washing of distilled water multiple times of filtration, up to the AgNO with 1M
3Detect filtrate and do not have Cl
-Till, obtain the xanchromatic product 40 ℃ of oven dry of baking oven 6 hours.Porphyrize is collected and is promptly got Yellow nanometer iron oxide yellow powder water-purifying material.
Example 4: the sewage purification experiment is to remove heavy metal ion Cd
2+Be example, experimentation is as follows: the CdNO for preparing 0.388mg/L earlier
34H
2The aqueous solution of O.Get 200mLCdNO
34H
2The aqueous solution of O adds 0.2g nano iron oxide yellow powder then, places on the magnetic stirring apparatus and stirs.Sampling is tested Cd with atomic spectrophotometer at last at regular intervals
2+Residual concentration.Experimental result shows: in about 15 minutes, the removal of heavy metal ions effect just can be near 100%; And time expand, reach 500 minutes, tangible desorption can't occur, and removal effect is highly stable.
Example 5: the CdNO for preparing 0.14mg/L earlier
34H
2The aqueous solution of O.Get 200mLCdNO
34H
2The aqueous solution of O adds 0.2g nano iron oxide yellow powder then, places on the magnetic stirring apparatus and stirs.Sampling is tested Cd with atomic spectrophotometer at last at regular intervals
2+Residual concentration.Experimental result shows: in about 15 minutes, the removal of heavy metal ions effect just can be near 100%; And time expand, reach 500 minutes, tangible desorption can't occur, and removal effect is highly stable.
Claims (5)
1, a kind of synthetic method of nanometer iron oxide yellow as water purifying material is characterized in that: adopt hydrothermal method synthetic.
2, the described synthetic method of a kind of claim 1 is characterized in that: iron salt solutions is joined in the NaOH solution fast, after fully stirring, be heated to 100-200 ℃, insulation; After fully reacting, cool to room temperature, washing, drying.
3, a kind of method synthesis of nano iron oxide yellow as water purifying material that adopts claim 1 or 2, this material diameter is about 30-50nm, appearance is quadrangular shape pattern.
4, a kind of purposes of nanometer iron oxide yellow as water purifying material of claim 3 is characterized in that: this material is applicable to containing heavy metal, bacterium, organic sewage purification.
5, the purposes of nanometer iron oxide yellow as water purifying material as claimed in claim 4 is characterized in that: this material is used to contain the sewage purification of heavy metal, bacterium, organic sewage of low concentration solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610091462 CN101088919A (en) | 2006-06-13 | 2006-06-13 | Nanometer iron oxide yellow as water purifying material and its synthesis process and use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610091462 CN101088919A (en) | 2006-06-13 | 2006-06-13 | Nanometer iron oxide yellow as water purifying material and its synthesis process and use |
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| Publication Number | Publication Date |
|---|---|
| CN101088919A true CN101088919A (en) | 2007-12-19 |
Family
ID=38942445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610091462 Pending CN101088919A (en) | 2006-06-13 | 2006-06-13 | Nanometer iron oxide yellow as water purifying material and its synthesis process and use |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386430B (en) * | 2008-10-17 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for high-efficiently and conveniently treating non-point source pollution using ferric oxide nano material |
| CN107500363A (en) * | 2017-08-16 | 2017-12-22 | 青岛大学 | A kind of preparation method of prism hexa-prism nano-sized iron oxide |
-
2006
- 2006-06-13 CN CN 200610091462 patent/CN101088919A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386430B (en) * | 2008-10-17 | 2011-07-20 | 中国科学院生态环境研究中心 | Method for high-efficiently and conveniently treating non-point source pollution using ferric oxide nano material |
| CN107500363A (en) * | 2017-08-16 | 2017-12-22 | 青岛大学 | A kind of preparation method of prism hexa-prism nano-sized iron oxide |
| CN107500363B (en) * | 2017-08-16 | 2018-12-28 | 青岛大学 | A kind of preparation method of prism hexa-prism nano iron oxide |
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| PB01 | Publication | ||
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Open date: 20071219 |