Application of magnetic caramelized carbon nano material in removing heavy metals in water body

A technology of caramelized carbon and nanomaterials, which can be applied in the fields of magnetic field/electric field water/sewage treatment, water pollutants, water/sewage treatment, etc., which can solve problems such as lack of adsorption capacity.

Active Publication Date: 2020-10-20
SHANDONG UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the past few years, various types of magnetic nanoparticles have been synthesized and used for the adsorption of

Method used

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  • Application of magnetic caramelized carbon nano material in removing heavy metals in water body
  • Application of magnetic caramelized carbon nano material in removing heavy metals in water body
  • Application of magnetic caramelized carbon nano material in removing heavy metals in water body

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1:

[0042] Synthesis of magnetic caramelized carbon nanomaterial γ-Fe 2 O 3 @CCM.

[0043] (1) Weigh 79.4 mg of ferrous chloride tetrahydrate and 151.4 mg of ferric chloride hexahydrate, measure 80 mL of ultrapure water and add it to the container, blow nitrogen for 30 minutes to exhaust the air in the device, and add 3 mL of ammonia dropwise with stirring. The magnetic solid particles are collected by magnetic adsorption, washed with high-purity water and ethanol alternately three times, and the solids are collected and dried in vacuum at 60°C to obtain γ-Fe 2 O 3 Nanosphere.

[0044] (2) Take 50mg γ-Fe 2 O 3 Nanospheres, 5g glucose were added to 5mL ethylene glycol and 90mL sodium hydroxide aqueous solution (pH=13) and ultrasonically dispersed for 90min, the mixed solution was sealed and heated in an oil bath at 190℃, stirred at high speed at 1900r / min for 90min. , Use magnetic adsorption to collect the magnetic solid particles obtained by the reaction, wash with h...

Example Embodiment

[0048] Example 2:

[0049] The same magnetic caramelized carbon nano material as in Example 1 was used to remove lead and vanadium from the water.

[0050] Using magnetic caramelization of carbon nanomaterial γ-Fe 2 O 3 @CCM is used as a magnetic adsorbent for heavy metals. The magnetic caramelized carbon nanomaterial γ-Fe 2 O 3 @CCM is added to the liquid matrix containing lead and vanadium, adjust the pH to 5-7, ultrasonically disperse the magnetic materials in the sample solution uniformly, ultrasonically or reciprocately vibrate for 5 minutes to adsorb and adsorb lead and vanadium, that is, lead in water , Vanadium removal at the same time. Caramelized carbon nanomaterial γ-Fe 2 O 3 @CCM is added at 0.4g / L. Use 1% HNO 3 The solution is eluted and shaken for 1-5 minutes to elute the metal ions into the eluent to realize the reuse of materials.

[0051] image 3 It is a magnetic caramelized carbon nanomaterial γ-Fe 2 O 3 @CCM is used to remove the lead and vanadium removal rate ...

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Abstract

The invention provides an application of a magnetic caramelized carbon nano material in removing heavy metals in a water body. The preparation method comprises the following steps: adding a magnetic caramelized carbon nano material gamma-Fe2O3-@CCM into a liquid matrix containing heavy metals; adjusting the pH of the system to be 2-7, carrying out ultrasonic uniform dispersion, performing reciprocating oscillation for 3-8 minutes after the ultrasonic treatment, and complexing and simultaneous removing trace heavy metals in water, wherein the adding amount of the caramelized carbon nano material gamma-Fe2O3@CCM is 0.2-0.6 g/L. According to the application method, arsenic and selenium in the industrial wastewater can be complexed and removed at the same time, the arsenic removal rate reaches116 [mu]g/g, the selenium removal rate reaches 185 [mu]g/g, lead and vanadium in the industrial wastewater can be complexed and removed at the same time, the lead removal rate reaches 248 [mu]g/g, and the vanadium removal rate reaches 319 [mu]g/g.

Description

Technical field: [0001] The invention provides an application of magnetic caramelized carbon nanomaterials in removing heavy metals in water bodies, and belongs to the technical field of carbon nanomaterial applications. Background technique: [0002] Heavy metal elements such as arsenic, selenium, and lead widely exist in natural water bodies and drinking water, directly affecting the ecological environment and people's health. Arsenic and lead are elements harmful to the human body, while selenium is one of the essential trace elements for the human body, but excessive intake can also cause harm to the human body. The latest groundwater quality standard in my country (GB / T 14848-2017) stipulates that Class I limits The concentration of arsenic is not higher than 1 μg / L, the concentration of lead is not higher than 5 μg / L, and the concentration of selenium is not higher than 10 μg / L. The sanitary standard for drinking water (GB5749-2006) stipulates that the concentration of ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/48C02F101/10
CPCC02F1/281C02F1/283C02F1/48C02F1/481C02F2101/103C02F2101/106
Inventor 陈静马龙占金华程世博李念露
Owner SHANDONG UNIV
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