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Method for producing green modified nanometer Fe-Sn double-metal particles by utilizing pine bark

A technology of pine bark and nano-iron, applied in chemical instruments and methods, textile industry wastewater treatment, water/sewage treatment, etc., can solve the problems of high cost, environmental pollution of chemical agents, and restriction of the use of modified nano-iron particles. , to achieve low cost, reduce synthesis cost, and realize the effect of resource utilization

Active Publication Date: 2019-05-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyacrylic acid, polyvinyl alcohol, polyvinyl pyrrolidone, etc. are commonly used modifiers, but if the chemical agents are used improperly, they will cause environmental pollution, and the cost is high, which limits the use of modified nano-iron particles

Method used

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  • Method for producing green modified nanometer Fe-Sn double-metal particles by utilizing pine bark
  • Method for producing green modified nanometer Fe-Sn double-metal particles by utilizing pine bark
  • Method for producing green modified nanometer Fe-Sn double-metal particles by utilizing pine bark

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pine bark was washed with deionized water and dried at 100 °C for 24 h. The dried pine bark was crushed and sieved, and the pine bark powder with a particle size below 300 μm was selected, soaked in anhydrous methanol at a ratio of 20 g / L, and ultrasonicated (60 W, 20 ° C) for 1 h. The pine bark powder methanol liquid is vacuum filtered through a 0.45 μm organic filter membrane, and the collected filtrate is the pine bark extract. The ferrous sulfate solution of pine bark extract and 20mL 11.1204g / L is mixed according to volume ratio 0:1, 0.5:1, 1.0:1, 1.5:1, 2.0:1, 2.5:1, 3.0:1 respectively ( The dosage of pine bark extract was 0, 10, 20, 30, 40, 50, 60mL respectively) to obtain the iron salt-pine bark extract mixture, which was shaken in a constant temperature water bath shaker for 5min (210rpm, 25°C). Then, 20 mL of 4.3152 g / L potassium borohydride solution was added dropwise to the mixture, and oscillated while adding. A black solid is formed in the system, and th...

Embodiment 2

[0035] Pine bark was washed with deionized water and dried at 100 °C for 24 h. The dried pine bark was crushed and sieved, and the pine bark powder with a particle size below 300 μm was selected, soaked in anhydrous methanol at a ratio of 30 g / L, and ultrasonicated (70 W, 25 ° C) for 1 h. The pine bark powder methanol liquid is vacuum filtered through a 0.45 μm organic filter membrane, and the collected filtrate is the pine bark extract. The pine bark extract is mixed with 20mL 33.3612g / L ferrous sulfate solution according to the volume ratio of 2.5:1 (the amount of pine bark extract is 50mL) to obtain the iron salt-pine bark extract mixed solution, which is placed in a constant temperature water bath shaker Shake for 5 min (220 rpm, 25°C). After adjusting the pH value of the mixed solution to 3.0, 4.4 (without adjusting the pH value), 5.0, 7.0, 9.0, and 11.0, add 20 mL of 16.1820 g / L potassium borohydride solution dropwise to the mixed solution, and oscillate while adding ....

Embodiment 3

[0039] Pine bark was washed with deionized water and dried at 100 °C for 24 h. The dried pine bark was crushed and sieved, and the pine bark powder with a particle size below 300 μm was selected, soaked in anhydrous methanol at a ratio of 40 g / L, and ultrasonicated (80 W, 30 ° C) for 1 h. The pine bark powder methanol liquid is vacuum filtered through a 0.45 μm organic filter membrane, and the collected filtrate is the pine bark extract. Mix the pine bark extract with 20mL 55.6020g / L ferrous sulfate solution according to the volume ratio of 2.5:1 (the amount of pine bark extract is 50mL) to obtain the iron salt-pine bark extract mixture, which is placed in a constant temperature water bath shaker Shake for 5 min (230 rpm, 25°C). Add 20mL of 32.3640g / L potassium borohydride solution dropwise to the mixed solution with an initial pH value of 4.4 (without adjusting the pH value), and vibrate while adding, a black solid is formed in the system, and bubbles are constantly bubbling...

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Abstract

The invention provides a method for producing green modified nanometer Fe-Sn double-metal particles by utilizing pine bark and belongs to the technical field of nanometer materials and waste water treatment. The method comprises the following steps: crushing dried pine bark, soaking the crushed pine bark in absolute methanol, and carrying out ultrasonic treatment and filtering to obtain pine barkextract; mixing the pine bark extract and a ferrous sulfate solution to obtain a ferric salt and pine bark extract mixture, and then adding a potassium borohydride solution to obtain a suspension of pine bark modified nanometer ferric particles; and then adding a stannous chloride solution, generating pine bark modified nanometer Fe-Sn double-metal particles and carrying out washing by utilizing deionized water and acetone. The removal rate of reactive brilliant blue KN-R in waste water is as high as more than 99%.

Description

technical field [0001] The invention belongs to the field of nanomaterials and wastewater treatment, and relates to a method for synthesizing modified nano-iron metals by using natural plant bark and its application, in particular to a method for synthesizing green modified iron by using natural pine bark A method of tin bimetallic particles and its application to the removal of dyes from wastewater. Background technique [0002] The demand and consumption of dyestuffs in my country is very huge, and the annual dyestuff production accounts for more than 60% of the world's total output, ranking first in the world. In various dyeing processes, about 12% of dyes are lost and discharged into the environment in the form of printing and dyeing wastewater. Generally speaking, printing and dyeing wastewater has complex components, poor biodegradability, high chroma, and certain anti-photolysis and anti-oxidation capabilities, which is extremely unfavorable for the treatment of prin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24C02F1/58C02F103/30
Inventor 高景峰邬志龙段婉君张文治
Owner BEIJING UNIV OF TECH
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