CN115159598A - Preparation method and application of sodium oxalate doped modified nano zero-valent iron - Google Patents
Preparation method and application of sodium oxalate doped modified nano zero-valent iron Download PDFInfo
- Publication number
- CN115159598A CN115159598A CN202210892801.8A CN202210892801A CN115159598A CN 115159598 A CN115159598 A CN 115159598A CN 202210892801 A CN202210892801 A CN 202210892801A CN 115159598 A CN115159598 A CN 115159598A
- Authority
- CN
- China
- Prior art keywords
- sodium oxalate
- valent iron
- nano zero
- modified nano
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 62
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 title claims abstract description 48
- 229940039790 sodium oxalate Drugs 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000243 solution Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000002244 precipitate Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 7
- 239000008239 natural water Substances 0.000 claims description 6
- 238000005067 remediation Methods 0.000 claims description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010907 mechanical stirring Methods 0.000 claims description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 235000006408 oxalic acid Nutrition 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
Abstract
The invention discloses a preparation method of sodium oxalate doped modified nano zero-valent iron, belonging to the technical field of nano material preparation and water purification environment, and comprising the following steps of: s1: preparation of FeSO 4 A solution; s2: preparing a sodium oxalate solution; s3: preparation of NaBH 4 A solution; s4: preparation of NaBH 4 /sodium oxalate mixed solution; s5: under the protection of nitrogen and under the condition of no oxygen, naBH is added 4 /adding the mixed solution of sodium oxalate into FeSO dropwise 4 Fully stirring and reacting in the solution for 20min; s6: separating out black precipitate; s7: washing; s8: vacuum drying to obtain modified nanometer zero-valent iron; the invention also discloses an application of the sodium oxalate doped modified nano zero-valent iron; compared with the nano zero-valent iron, the sodium oxalate doped modified nano zero-valent iron has better reaction activity and reusability, and the treatment efficiency of Cr (VI) in a water phase is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of nano material preparation and water purification environment, and particularly relates to a preparation method and application of sodium oxalate doped modified nano zero-valent iron.
Background
The nanometer zero-valent iron has the advantages of high activity, large specific surface area, easy preparation, magnetism, convenient recycling and the like, and is rapidly developed in the field of pollution remediation of natural water bodies such as underground water and the like in recent years.
However, because the nano particles have a large specific surface area and a high surface energy, the nano zero-valent iron is easily oxidized in the air to form a surface oxide film, which causes severe passivation of the material and affects the remediation effect in natural water pollution.
In view of this, the sodium oxalate doped modified nano zero-valent iron is designed to improve the reactivity and the reusability of the nano zero-valent iron so as to achieve the purpose of remarkably improving the remediation efficiency in natural water body pollution and solve the problems.
Disclosure of Invention
To solve the problems raised in the background art described above. The invention provides a preparation method and application of sodium oxalate doped modified nano zero-valent iron, which has the characteristics of better reaction activity and reutilization property and remarkably improved Cr (VI) treatment efficiency in a water phase.
The invention also aims to provide application of the sodium oxalate doped modified nano zero-valent iron.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of sodium oxalate doped modified nano zero-valent iron comprises the following steps:
s1: weighing FeSO 4 ·7H 2 Dissolution of OIn oxygen-free water to obtain FeSO 4 A solution;
s2: weighing sodium oxalate and dissolving the sodium oxalate in oxygen-free water to prepare a sodium oxalate solution;
s3: weighing NaBH 4 Dissolving in oxygen-free water to obtain NaBH 4 A solution;
s4: reacting NaBH 4 Mixing the solution with sodium oxalate solution, stirring thoroughly for 20min to obtain NaBH 4 /sodium oxalate mixed solution;
s5: feSO (ferric oxide) is added 4 The solution is placed in a three-neck flask with mechanical stirring, and NaBH is added under the protection of nitrogen and under the oxygen-free condition 4 /sodium oxalate mixed solution is dripped into FeSO 4 Fully stirring and reacting in the solution for 20min;
s6: separating black precipitate in the three-neck flask by using a magnet;
s7: washing the black precipitate with oxygen-free water and absolute ethyl alcohol;
s8: and immediately putting the washed black precipitate into a vacuum drying oven for drying to prepare the modified nano zero-valent iron.
Preferably, in step S1, feSO 4 ·7H 2 The mass volume ratio of O to oxygen-free water is 1.2:30 (g: mL).
Preferably, in the step S3, naBH 4 The mass-volume ratio of the oxygen-free water to the oxygen-free water is 0.38:20 (g: mL).
Preferably, in the step S4 and the step S5, the stirring speed is 200-300r/min.
Preferably, in step S7, the number of washing is three.
Preferably, in the step S8, the drying temperature of the vacuum drying oven is 60 ℃ and the drying time is 12 hours.
A modified nano zero-valent iron prepared by a preparation method of sodium oxalate doped modified nano zero-valent iron.
An application of the modified nano zero-valent iron in natural water body pollution remediation.
Compared with the prior art, the invention has the beneficial effects that:
compared with the nano zero-valent iron, the sodium oxalate doped modified nano zero-valent iron has better reaction activity and reusability, and the treatment efficiency of Cr (VI) in a water phase is remarkably improved.
Drawings
FIG. 1 is a flow chart of a method for preparing sodium oxalate doped modified nano zero-valent iron according to the present invention;
FIG. 2 is X-ray diffraction diagrams of modified nano zero-valent iron with different oxalic acid doping ratios and a comparative example;
FIG. 3 shows the effect of modified nanoscale zero-valent iron with different oxalic acid doping ratios on Cr (VI) removal;
FIG. 4 is a graph showing the change of the second-order kinetic constants of modified nanoscale zero-valent iron with different oxalic acid doping ratios to Cr (VI) removal according to the present invention;
FIG. 5 is a diagram showing the effect of the present invention in the reuse of the modified nano zero-valent iron material in the Cr (VI) removal process.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-5, the present invention provides the following technical solutions: a preparation method of sodium oxalate doped modified nano zero-valent iron comprises the following steps:
s1: 1.2g of FeSO are weighed out 4 ·7H 2 Dissolving O in 30mL of oxygen-free water to obtain FeSO 4 A solution;
s2: weighing 0.02g of sodium oxalate, and dissolving in 30mL of oxygen-free water to prepare a sodium oxalate solution;
s3: 0.38g of NaBH was weighed 4 Dissolving in 20mL of oxygen-free water to obtain NaBH 4 A solution;
s4: reacting NaBH 4 Mixing the solution with sodium oxalate solution, and stirring at 200-300r/min20min to obtain NaBH 4 /sodium oxalate mixed solution;
s5: feSO (ferric oxide) is prepared 4 The solution is placed in a three-neck flask with mechanical stirring, and NaBH is added under the protection of nitrogen and under the anaerobic condition 4 /sodium oxalate mixed solution is dripped into FeSO 4 Fully stirring and reacting in the solution for 20min at the stirring speed of 200-300 r/min;
s6: separating out black precipitate in the three-neck flask by using a magnet;
s7: washing the black precipitate for three times by using oxygen-free water and absolute ethyl alcohol;
s8: and immediately putting the washed black precipitate into a vacuum drying oven, and drying the black precipitate in the vacuum drying oven at the drying temperature of 60 ℃ for 12 hours to obtain the modified nano zero-valent iron.
A modified nano zero-valent iron prepared by a preparation method of sodium oxalate doped modified nano zero-valent iron.
An application of modified nano zero-valent iron in natural water pollution remediation.
C in the modified nano zero-valent iron prepared in the example 2 O 4 2- And FeSO 4 Is 1 oxa (1/29)。
Example 2
The present embodiment is different from embodiment 1 in that:
0.01g of sodium oxalate was weighed and dissolved in 30mL of oxygen-free water to prepare a sodium oxalate solution.
C in the modified nano zero-valent iron prepared in the example 2 O 4 2- And FeSO 4 Is 1 oxa (1/58)。
Example 3
The present embodiment is different from embodiment 1 in that:
0.03g of sodium oxalate was weighed and dissolved in 30mL of oxygen-free water to prepare a sodium oxalate solution.
C in the modified nano zero-valent iron prepared in the example 2 O 4 2- And FeSO 4 In a molar ratio of1, thus labeling the modified nano zero-valent iron as nfet oxa (1/19)。
Example 4
The present embodiment is different from embodiment 1 in that:
0.04g of sodium oxalate was weighed and dissolved in 30mL of oxygen-free water to prepare a sodium oxalate solution.
C in the modified nano zero-valent iron prepared in the example 2 O 4 2- And FeSO 4 1 oxa (1/14)。
Comparative example
And SA: 1.2g of FeSO are weighed out 4 ·7H 2 Dissolving O in 30mL of oxygen-free water to obtain FeSO 4 A solution;
SB: 0.38g of NaBH is weighed out 4 Dissolving in 20mL of oxygen-free water to obtain NaBH 4 A solution;
SC: feSO (ferric oxide) is prepared 4 The solution is put into a three-neck flask with mechanical stirring, and NaBH is added under the protection of nitrogen and under the oxygen-free condition 4 Dropwise addition of the solution into FeSO 4 Fully reacting in the solution for 20min at the stirring speed of 200-300r/min to prepare nano zero-valent iron which is marked as nFe 0 。
The XRD spectrograms of the modified nano zero-valent iron material and the comparative example are shown in the attached figure 2 of the specification, the mineral components and the crystallinity of the modified nano zero-valent iron material and the comparative example can be compared, the modified nano zero-valent iron material and the comparative example both have obvious diffraction peaks of zero-valent iron at 44.6 degrees, and Fe can be seen in the XRD spectrogram of the comparative example 3 O 4 Weak characteristic diffraction peak, indicating that the surface of the comparative example has a thin layer of Fe 3 O 4 The oxide layer does not have a corresponding magnetite diffraction peak in the modified nano zero-valent iron material, so that the oxide layer on the surface of the comparative example can be corroded by doping oxalic acid, and the passivation process is delayed.
Comparative experiment of reactivity:
at the reaction temperature of 10 +/-2 ℃, adding 1g/L of the examples 1, 2, 3 and 4 and the comparative example into 10mg/L Cr (VI), adjusting the pH value of the solution to be 6, and carrying out the reaction under aerobic conditions;
the experimental results are shown in the attached figure 3 of the specification, and it can be seen that, when the molar ratio of oxalic acid to Fe is 1/29, the prepared example 1 has the highest reaction activity, cr (VI) is completely removed within 20min, while the comparative example under the same conditions has 68.5% removed within 20min, and the removal efficiency of Cr (VI) after 1h of reaction is only 88.7%, so that the removal efficiency of the modified nano zero-valent iron material modified by doping oxalic acid is generally higher than that of the unmodified comparative example, and the doping amount of oxalic acid has a significant effect on the modified nano zero-valent iron;
and further carrying out secondary kinetic fitting on the data shown in the attached figure 3 of the specification, wherein the fitting result is shown in the attached figure 4 of the specification, and it can be seen that the doping amount of oxalic acid and the reactivity of the modified nano zero-valent iron are not linearly related, but the removal rate of Cr (VI) is increased and then reduced and is kept stable along with the increase of the adding amount of oxalic acid.
Recycling experiments:
the modified nano zero-valent iron material with balanced adsorption is recycled for 5 times after being magnetically recycled and is used for removing Cr (VI), the experimental result is shown in the attached figure 5 in the specification, and it can be seen that along with the continuous increase of the recycling times, the removal efficiency of the modified nano zero-valent iron to Cr (VI) within 1h is gradually reduced, the removal effect of the modified nano zero-valent iron after being recycled for 5 times is reduced by nearly 50% compared with the material newly prepared, and the FeS modified nFe reported in the prior art is reduced by nearly 50% 0 The Cr (VI) removal rate of the material after three cycles is reduced to 33.4 percent, and the nFe alone 0 The Cr (VI) removal efficiency after three times of repeated use is 19.8%, and the result shows that the modified nano zero-valent iron has better reutilization property in the aspect of removing the Cr (VI).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A preparation method of sodium oxalate doped modified nano zero-valent iron is characterized by comprising the following steps:
s1: weighing FeSO 4 ·7H 2 Dissolving O in oxygen-free water to obtain FeSO 4 A solution;
s2: weighing sodium oxalate and dissolving the sodium oxalate in oxygen-free water to prepare a sodium oxalate solution;
s3: weighing NaBH 4 Dissolving in oxygen-free water to obtain NaBH 4 A solution;
s4: reacting NaBH 4 Mixing the solution with sodium oxalate solution, stirring thoroughly for 20min to obtain NaBH 4 /sodium oxalate mixed solution;
s5: feSO (ferric oxide) is added 4 The solution is placed in a three-neck flask with mechanical stirring, and NaBH is added under the protection of nitrogen and under the oxygen-free condition 4 /adding the mixed solution of sodium oxalate into FeSO dropwise 4 Fully stirring the solution to react for 20min;
s6: separating black precipitate in the three-neck flask by using a magnet;
s7: washing the black precipitate with oxygen-free water and absolute ethyl alcohol;
s8: and immediately putting the washed black precipitate into a vacuum drying oven for drying to prepare the modified nano zero-valent iron.
2. The preparation method of the sodium oxalate doped modified nano zero-valent iron according to claim 1, characterized by comprising the following steps: in the step S1, feSO 4 ·7H 2 The mass volume ratio of the O to the oxygen-free water is 1.2:30 (g: mL).
3. The preparation method of the sodium oxalate doped modified nano zero-valent iron according to claim 1, characterized by comprising the following steps: in the step S3, naBH 4 The mass-volume ratio of the oxygen-free water to the oxygen-free water is 0.38:20 (g: mL).
4. The preparation method of the sodium oxalate doped modified nano zero-valent iron according to claim 1, characterized by comprising the following steps: in the step S4 and the step S5, the stirring speed is 200-300r/min.
5. The preparation method of the sodium oxalate doped modified nano zero-valent iron according to claim 1, characterized by comprising the following steps: in the step S7, the number of washing times is three.
6. The preparation method of the sodium oxalate doped modified nano zero-valent iron according to claim 1, characterized by comprising the following steps: in the step S8, the drying temperature of the vacuum drying oven is 60 ℃, and the drying time is 12h.
7. The modified nano zero-valent iron prepared by the preparation method of sodium oxalate doped modified nano zero-valent iron according to any one of claims 1 to 6.
8. The use of the modified nanoscale zero-valent iron of claim 7 in natural water body pollution remediation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210892801.8A CN115159598B (en) | 2022-07-27 | 2022-07-27 | Preparation method and application of sodium oxalate doped modified nano zero-valent iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210892801.8A CN115159598B (en) | 2022-07-27 | 2022-07-27 | Preparation method and application of sodium oxalate doped modified nano zero-valent iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115159598A true CN115159598A (en) | 2022-10-11 |
| CN115159598B CN115159598B (en) | 2023-11-21 |
Family
ID=83497600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210892801.8A Active CN115159598B (en) | 2022-07-27 | 2022-07-27 | Preparation method and application of sodium oxalate doped modified nano zero-valent iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115159598B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997018204A1 (en) * | 1995-11-16 | 1997-05-22 | Merck Sharp & Dohme Limited | Substituted tetrahydropyridine derivatives acting on 5-ht receptors |
| CN108911101A (en) * | 2018-06-25 | 2018-11-30 | 华中师范大学 | A method of based on the efficient heavy-metal ion removal of ball milling oxalic acid Zero-valent Iron |
| CN109384299A (en) * | 2018-08-10 | 2019-02-26 | 华中师范大学 | A kind of method that the modified Zero-valent Iron of sodium oxalate removes Cr VI in water body |
| CN109848403A (en) * | 2018-11-24 | 2019-06-07 | 天津大学 | A kind of modified Nano Zero-valent Iron and preparation method thereof and the application for handling industrial seepage pit bed mud heavy metal |
| CN110104742A (en) * | 2019-04-02 | 2019-08-09 | 山东大学 | A kind of method and separate type continuous flow reactor of combination aging magnetization pretreatment Zero-valent Iron removal Cr (VI) |
| CN113371809A (en) * | 2021-06-09 | 2021-09-10 | 浙江工业大学 | Aromatic carboxylic acid modified zero-valent iron agent and preparation method and application thereof |
| CN113457617A (en) * | 2021-08-20 | 2021-10-01 | 兰州交通大学 | Preparation method of modified attapulgite loaded vulcanized nano zero-valent iron heavy metal adsorbent, product and application thereof |
| CN115920829A (en) * | 2022-09-23 | 2023-04-07 | 湖北省生态环境科学研究院(省生态环境工程评估中心) | Sodium oxalate-FeS/Fe 0 Composite material, preparation method and application thereof |
-
2022
- 2022-07-27 CN CN202210892801.8A patent/CN115159598B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997018204A1 (en) * | 1995-11-16 | 1997-05-22 | Merck Sharp & Dohme Limited | Substituted tetrahydropyridine derivatives acting on 5-ht receptors |
| CN108911101A (en) * | 2018-06-25 | 2018-11-30 | 华中师范大学 | A method of based on the efficient heavy-metal ion removal of ball milling oxalic acid Zero-valent Iron |
| CN109384299A (en) * | 2018-08-10 | 2019-02-26 | 华中师范大学 | A kind of method that the modified Zero-valent Iron of sodium oxalate removes Cr VI in water body |
| US20200048117A1 (en) * | 2018-08-10 | 2020-02-13 | Central China Normal University | Method for removing hexavalent chromium from water bodies by sodium oxalate-modified zero-valent iron |
| CN109848403A (en) * | 2018-11-24 | 2019-06-07 | 天津大学 | A kind of modified Nano Zero-valent Iron and preparation method thereof and the application for handling industrial seepage pit bed mud heavy metal |
| CN110104742A (en) * | 2019-04-02 | 2019-08-09 | 山东大学 | A kind of method and separate type continuous flow reactor of combination aging magnetization pretreatment Zero-valent Iron removal Cr (VI) |
| CN113371809A (en) * | 2021-06-09 | 2021-09-10 | 浙江工业大学 | Aromatic carboxylic acid modified zero-valent iron agent and preparation method and application thereof |
| CN113457617A (en) * | 2021-08-20 | 2021-10-01 | 兰州交通大学 | Preparation method of modified attapulgite loaded vulcanized nano zero-valent iron heavy metal adsorbent, product and application thereof |
| CN115920829A (en) * | 2022-09-23 | 2023-04-07 | 湖北省生态环境科学研究院(省生态环境工程评估中心) | Sodium oxalate-FeS/Fe 0 Composite material, preparation method and application thereof |
Non-Patent Citations (5)
| Title |
|---|
| CAO, MH: "Remediation of arsenic contaminated soil by coupling oxalate washing with subsequent ZVI/Air treatment", 《CHEMOSPHERE》, vol. 144 * |
| 吴叔璇: "草酸改性零价铁活化过硫酸盐降解地下水中2, 4-DNT的研究", 《环境科学研究》, vol. 35, no. 1 * |
| 杨灵芳;: "负载型纳米零价铁复合材料去除U(Ⅵ)的研究现状", 江西化工, no. 03 * |
| 罗京;何广平;吴宏海;: "有机配体对纳米零价铁还原硝基苯的影响与机理", 环境工程学报, no. 08 * |
| 辛梓弘;凡小梅;倪海晨;曹广霞;: "纳米零价铁的制备及其对废水中铬的去除作用研究", 广州化工, no. 11 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115159598B (en) | 2023-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | An old story with new insight into the structural transformation and radical production of micron-scale zero-valent iron on successive reactivities | |
| CN112316906B (en) | Preparation method of ferromagnetic amino-modified lanthanide metal organic framework material and application of ferromagnetic amino-modified lanthanide metal organic framework material in adsorption dephosphorization | |
| CN102258980A (en) | Method for preparing sulfured magnetic chitosan and method for treating waste water containing heavy metals by using sulfured magnetic chitosan | |
| CN103560228A (en) | Method for compositing iron oxide and graphene by virtue of hydrothermal process | |
| Liu et al. | Fabrication of novel magnetic core-shell chelating adsorbent for rapid and highly efficient adsorption of heavy metal ions from aqueous solution | |
| CN112897627A (en) | Method for removing heavy metal wastewater | |
| CN105148835B (en) | Granular pattern 13X molecular sieves/attapulgite loaded Nanoscale Iron nickel material and preparation method thereof | |
| CN107010652A (en) | A kind of method that solid phase prepares zinc sulphide absorbent charcoal composite material | |
| CN108147518B (en) | Modified starch water treatment agent and preparation method and application thereof | |
| CN109821503B (en) | Uranium adsorption material and preparation method and application thereof | |
| CN111825260A (en) | Regulation and control of selective adsorption of Cu from wastewater by carbon nanotubes2+、Pb2+、Zn2+Method (2) | |
| Jiang et al. | A novel Fe3O4/graphene oxide composite prepared by click chemistry for high-efficiency removal of Congo red from water | |
| CN115159598A (en) | Preparation method and application of sodium oxalate doped modified nano zero-valent iron | |
| CN113060780B (en) | Method for rapidly removing uranium in water by aging modified zero-valent iron | |
| CN108355674A (en) | A kind of zinc sulphide composite photo-catalyst and preparation method for sewage disposal | |
| CN112110744A (en) | Magnetic porous ceramic adsorption material and preparation method and application thereof | |
| CN111013535A (en) | Preparation method and application of lead-adsorbed magnetic graphene oxide composite material | |
| CN108176350A (en) | A kind of technique for preparing Low Cost Sorbents using coal quality flying dust | |
| CN107134602A (en) | A kind of method that high activity ultra-fine lead oxide powder is synthesized with scrap lead cream | |
| CN109599491B (en) | Preparation method of fullerene film for organic solar cell | |
| CN113277784A (en) | Pumice concrete with electromagnetic wave absorption function | |
| CN113926422A (en) | Preparation and application of magnetic bagasse carbon-loaded ferrihydrite composite adsorbent | |
| CN112517920A (en) | Sulfonated iron-copper bimetallic composite material and preparation method and application thereof | |
| CN112670499A (en) | Porous layered CoFe2O4/C nano composite material and preparation method thereof | |
| CN105503167A (en) | Method for synthesizing codoped zinc nickel ferrite soft magnetic material from zinc-containing electric furnace dust |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |