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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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  • Summary
  • 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 heavy metal ions. However, these materials are still lacking in adsorption capacity and are only in the laboratory stage.

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

Embodiment 1

[0042] Synthesis of Magnetic Caramelized Carbon Nanomaterials γ-Fe 2 o 3 @CCM.

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

[0044] (2) Take 50mg γ-Fe 2 o 3 Nanospheres, 5g of glucose were added to 5mL of ethylene glycol and 90mL of sodium hydroxide aqueous solution (pH = 13) for ultrasonic dispersion for 90min, the mixture was sealed and heated in an oil bath at 190°C, and stirred at a high speed of 1900r / min for 90min , use magnetic adsorption to collect the magnetic solid particles obtained by the reaction, wash them ...

Embodiment 2

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

[0050] Magnetic caramelization of carbon nanomaterials γ-Fe 2 o 3 @CCM is used as heavy metal magnetic adsorbent. The magnetic caramelized carbon nanomaterial γ-Fe 2 o 3 Add @CCM to the liquid matrix containing lead and vanadium, adjust the pH to 5-7, ultrasonically disperse the magnetic material in the sample solution, ultrasonically or reciprocally oscillate for 5 minutes, and adsorb and adsorb lead and vanadium, that is, lead in water , Vanadium removal at the same time. Caramelized Carbon Nanomaterials γ-Fe 2 o 3 The addition amount of @CCM is 0.4g / L. Use a concentration of 1% HNO 3 The solution elution shakes for 1-5min, and the metal ions can be eluted into the eluent, realizing the reuse of materials.

[0051] image 3 is the magnetic caramelized carbon nanomaterial γ-Fe 2 o 3 The change diagram of the removal rate of @CCM used t...

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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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