Method for removing heavy metal lead ions from water mass by absorbing with sodium alginate-hydrotalcite-graphene gel balls

A technology of sodium alginate and alginate gel balls, which is applied in the direction of adsorption of water/sewage treatment, alkali metal compounds, water/sewage treatment, etc. It can solve the problem of difficulty in meeting the requirements for emergency and rapid treatment of aminophenol, long adsorption time of gel balls, Insufficient adsorption capacity and other problems, to achieve the effects of shortening the adsorption equilibrium time, strengthening the mechanical strength, and simplifying the preparation method

Inactive Publication Date: 2017-07-14
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In recent years, sodium alginate is often used as an embedding agent for immobilized cells in the treatment of heavy metals, but its gel balls still have the problems of long adsorption time and insufficient adsorption capacity, and it is difficult to meet the sudden p-aminophenol pollution accidents. emergency response requirements
However, the research on graphene oxide-sodium alginate as heavy metal adsorbent is relatively rare.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 40 mg of graphite oxide and 20 mL of distilled water into the beaker, ultrasonicate for 6 hours until the solution is uniform, and obtain a 2 mg / mL graphene oxide solution, dissolve 20 mg of sodium alginate in the above solution, and stir mechanically for 1 hour to form a uniform solution; then add 0.6 g of hydrotalcite , mechanically stirred for 0.5h to form a homogeneous solution. In another beaker, 10mg / mL of CaCl 2 Solution, drop sodium alginate / hydrotalcite / graphene oxide solution into CaCl with peristaltic pump 2 After the solution is solidified for 8-12 hours, sodium alginate-hydrotalcite-graphene gel balls are obtained.

[0034] Add 0.25 g of the above-mentioned double-network gel balls with different graphene contents to 50 mL of water with a heavy metal concentration of 25 mg / L, perform vibration adsorption on a HY-4 speed-adjustable multi-purpose oscillator for 3 h, and use an inductively coupled plasma mass spectrometer (ICP) detects the content of hea...

Embodiment 2

[0036] Add 80 mg of graphite oxide and 20 mL of distilled water into the beaker, ultrasonicate for 6 hours until the solution is uniform, and obtain a 4 mg / mL graphene oxide solution, dissolve 20 mg of sodium alginate in the above solution, and mechanically stir for 1 hour to form a uniform solution; then add 1.0 g of hydrotalcite , mechanically stirred for 0.5h to form a homogeneous solution. In another beaker, 10mg / mL of CaCl 2 Solution, drop sodium alginate / hydrotalcite / graphene oxide solution into CaCl with peristaltic pump 2 After the solution is solidified for 8-12 hours, sodium alginate-hydrotalcite-graphene gel balls are obtained.

[0037]Add 0.25 g of the above-mentioned double network gel balls with different graphene contents to 50 mL of water with a heavy metal concentration of 25 mg / L, carry out oscillation adsorption on a HY-4 speed-adjustable multi-purpose oscillator for 3 hours, and use an inductively coupled plasma mass spectrometer to detect The heavy metal...

Embodiment 3

[0039] Add 160 mg of graphite oxide and 20 mL of distilled water into the beaker, ultrasonicate for 6 hours until the solution is uniform, and obtain an 8 mg / mL graphene oxide solution, dissolve 20 mg of sodium alginate in the above solution, and mechanically stir for 1 hour to form a uniform solution; then add 0.9 g of hydrotalcite , mechanically stirred for 0.5h to form a homogeneous solution. In another beaker, 10mg / mL of CaCl 2 Solution, drop sodium alginate / hydrotalcite / graphene oxide solution into CaCl with peristaltic pump 2 After the solution is solidified for 8-12 hours, sodium alginate-hydrotalcite-graphene gel balls are obtained.

[0040] Add 0.25 g of the above-mentioned double network gel balls with different graphene contents to 50 mL of water with a heavy metal concentration of 25 mg / L, carry out oscillation adsorption on a HY-4 speed-adjustable multi-purpose oscillator for 3 hours, and use an inductively coupled plasma mass spectrometer to detect The heavy me...

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Abstract

The invention provides a method for removing heavy metal lead ions from a water mass by absorbing with sodium alginate-hydrotalcite-graphene gel balls. The method comprises the following steps of adding the sodium alginate-hydrotalcite-graphene gel balls into the water mass which contains the heavy metal lead ions, and vibrating to absorb the heavy metal lead ions. Unsaturated ions and chemical groups, such as carboxyl and hydroxyl, which have lone electron pairs, are on the surface of sodium alginate, on one hand, ion exchange reaction occurs between the unsaturated ions of the sodium alginate and the lead ions, and on the other hand, complexation occurs between the groups, such as carboxyl and hydroxyl on the surface of sodium alginate and the lead ions. As oxidized grapheme is added into the sodium alginate, the mechanical strength and tenacity of the gel balls are improved, functional groups which can be reacted with the metal ions, in the adsorbent are also increased, and the removal rate of the method is higher than that of the method for removing lead by sodium alginate gel balls. The method provided by the invention is simple in step, convenient in operation and high in practicability.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorption, in particular to the removal of heavy metal lead ions in a sodium alginate-hydrotalcite-graphene gel ball adsorption water body. Background technique [0002] Water body is one of the main natural resources that human beings rely on for survival, and it is also an important part of the human ecological environment, as well as a reservoir of material biogeochemical cycles, which has certain sensitivity to the environment. Due to the impact of human activities, more and more pollutants have entered the water environment, and these pollutants have caused many problems to the environment and human health. Especially with the development of mining, smelting, chemical industry, electroplating, electronics, tanning and other industries, as well as unreasonable landfill and stacking of civil solid waste, accidental discharge of heavy metal pollutants, and the application of a large amount of chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/06B01J20/20B01J20/24B01J20/28019B01J20/28047C02F1/288
Inventor 刘秀玉朱英黄惠单然然
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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