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Biomass carbon-loaded nano zero-valent iron material as well as preparation method and application thereof

A nano-zero-valent iron and biomass carbon technology, applied in the field of nano-materials, can solve problems such as difficulty in recycling, and achieve the effects of not easy to agglomerate, mild reaction, and good dispersibility

Inactive Publication Date: 2016-08-31
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Nano zero-valent iron is not easy to recycle, which will cause certain pressure on the environment
Unseen reports on the use of biomass carbon as a carrier for nanoscale zero-valent iron

Method used

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  • Biomass carbon-loaded nano zero-valent iron material as well as preparation method and application thereof
  • Biomass carbon-loaded nano zero-valent iron material as well as preparation method and application thereof
  • Biomass carbon-loaded nano zero-valent iron material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of Biomass Carbon-Loaded Nano Zero-Valent Iron Material

[0026] 1. Crush clean walnut shells through a 100-mesh fine sieve, wash with water, centrifuge until the supernatant is colorless, wash with organic solvent and deionized water, and dry overnight in a blast dryer at 65°C.

[0027] 2. Weigh 10 g of walnut shell powder dried in step 1 into a crucible with a lid, cover it, and carbonize it in a muffle furnace at 600°C at a high temperature, and the residence time at 600°C is 4h.

[0028] 3. Dissolve the biomass carbon obtained in step 2 in 100 mL of 1 mol / L hydrochloric acid, boil for 30 min, and remove the inorganic salt and ash therein.

[0029] 4. Filter the mixed liquid obtained in step 3, wash with organic solvents such as absolute ethanol and DMF, and deionized water three times, and dry overnight in a blast dryer.

[0030] 5. Weigh 1.6218g ferric chloride hexahydrate and dissolve it in 100mL alcohol:water=4:1 mixture.

[0031] 6. Weigh...

Embodiment 2

[0036] Example 2 Research on the degradation of bromophenol blue by biomass carbon loaded nanometer zero-valent iron material

[0037] 1. Prepare 5 parts of the same bromophenol blue solution 100mL in a 150mL Erlenmeyer flask, the concentration is 10mg / L, and the solvent is water.

[0038] 2. Take respectively 0.01g, 0.05g, 0.1g, 0.15g and 0.2g of the biomass carbon-loaded nano-zero-valent iron material (named as C-NZVI) obtained in Example 1 and throw them into five different Erlenmeyer flasks in step 1 in solution.

[0039] 3. Start timing immediately after the feeding is completed, and take samples at the specified time. The sampling time is 0min, 30min, 1h, 2h, 4h, 6h, 8h, 12h, 24h.

[0040] 4. Use the ultraviolet spectrophotometer to test the sample, the specific results are as follows image 3 .

[0041] From image 3 It can be seen that when other conditions are the same, with the increase of C-NZVI dosage, the reaction becomes faster and faster. The dosage range o...

Embodiment 3

[0042] Example 3 Comparison of the dispersibility of carbon microsphere-supported nanometer zero-valent iron (named as C-NZVI) and other materials

[0043] 1. The biomass carbon-loaded nano-zero-valent iron material C-NZVI (two parts), C (biomass carbon) and NZVI (traditional nano-zero-valent iron) obtained in Example 1 that weighed 0.05 g were placed in 4 identical In the 50mL colorimetric tube.

[0044] 2. Add 0.05g of CMC to one of the colorimetric tubes added with C-NZVI.

[0045] 3. Add 50mL deionized water to the four colorimetric tubes, shake well, and put them on the test bench.

[0046] 4. Collect photos of the samples at 15min, 1.0h and 2h respectively.

[0047] Such as Figure 4As shown, from left to right are photos after standing for 15min, 1h and 3h respectively. When standing for 15 minutes, the materials can still maintain good dispersion; when standing for 1 hour, there is no big change compared with before, only a small part of C-NZVI is agglomerated; aft...

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Abstract

The invention discloses a biomass carbon-loaded nano zero-valent iron material as well as a preparation method and application thereof. The method concretely comprises the following steps: adding walnut shell biomass carbon into an FeCl3.6H2O solution, mixing for 20-30 hours at the room temperature, then dropwise adding an NaBH4 solution into the mixture under the protection of inert atmosphere, and continuously stirring for 0.5-1 hour after adding; finally, carrying out suction filtration, taking filter residue, washing and drying to obtain the biomass carbon-loaded nano zero-valent iron material. The preparation method is simple; in the material obtained by the method, zero-valent iron particles are small in particle sizes, even in distribution and can not easily agglomerate, so that the biomass carbon-loaded nano zero-valent iron material can be applied to repairing pollutants such as organic matters and heavy metal in underground water and soil.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a biomass carbon-loaded nanometer zero-valent iron material, a preparation method and an application thereof. Background technique [0002] Iron is widely used in real life. The use of its simple nano-materials to degrade pollutants in the environment can not only be environmentally friendly and economically available, but also cause no secondary pollution when using nano-zero-valent iron to degrade pollutants. In addition, elemental iron can simultaneously remove halogenated organic pollutants, nitroaromatic compounds, and heavy metals in the environment, and is a multifunctional pollutant removal material. It has been widely used in the field of wastewater treatment, and is gradually developing towards the field of soil remediation. [0003] However, nano-zero-valent iron still has many limitations in the process of practical application. (1) Due to the large speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/30C02F101/20
CPCB01J20/02B01J20/20C02F1/283C02F2101/20C02F2101/30
Inventor 彭林付融冰毕东苏
Owner SHANGHAI INST OF TECH
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