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Method for manufacturing porous material used for removing chromium pollution in water by modifying phoenix tree leaves with concentrated sulfuric acid

A technology of sycamore leaves and porous materials, applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as low chromium adsorption capacity, improve adsorption efficiency, realize resource utilization, and reduce costs Effect

Inactive Publication Date: 2019-09-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many of these naturally effective adsorbents have low chromium adsorption capacity
Secondary contamination of polymers formed after pure adsorption is still the main obstacle

Method used

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  • Method for manufacturing porous material used for removing chromium pollution in water by modifying phoenix tree leaves with concentrated sulfuric acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this embodiment, a method for making porous materials for removing chromium pollution from water by using concentrated sulfuric acid to modify sycamore leaves includes the following steps:

[0020] (1) The collected sycamore leaves are washed repeatedly to remove dust and soluble impurities and then dried to make sycamore leaves powder;

[0021] (2) Take the phoenix tree leaf powder and mix with 98% concentrated sulfuric acid, and seal it with plastic wrap; wherein the dosage of the phoenix tree leaf powder and the concentrated sulfuric acid is 0.2:1;

[0022] (3) After the sycamore leaf powder and concentrated sulfuric acid are fully reacted, soak and stir, repeatedly wash to remove excess sulfuric acid, and the prepared porous material carbonized adsorbent is dried and sealed and placed in a desiccator.

[0023] Using the method of this embodiment, a large number of pores appear on the surface of the porous material of the prepared concentrated sulfuric acid modified sycamo...

Embodiment 2

[0025] In this embodiment, a method for making porous materials for removing chromium pollution from water by using concentrated sulfuric acid to modify sycamore leaves includes the following steps:

[0026] (1) The collected sycamore leaves are washed repeatedly to remove dust and soluble impurities and then dried to make sycamore leaves powder;

[0027] (2) Take the sycamore leaf powder and mix with 49% concentrated sulfuric acid, and seal it with cling film; the weight ratio of the sycamore leaf powder and concentrated sulfuric acid is 2:1;

[0028] (3) After the phoenix tree leaf powder and concentrated sulfuric acid are fully reacted, soak and stir, wash repeatedly to remove excess sulfuric acid, and the prepared porous material carbonized adsorbent is dried and sealed and placed in a desiccator.

[0029] Using the method of this embodiment, a large number of pores appeared on the surface of the porous material of the prepared concentrated sulfuric acid modified sycamore leaves, t...

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Abstract

The invention discloses a method for manufacturing a porous material used for removing chromium pollution in water by modifying phoenix tree leaves with concentrated sulfuric acid. According to the invention, through impregnation of the phoenix tree leaves with the concentrated sulfuric acid, pore channel transformation of the phoenix tree leaves is realized; low-temperature carbonization is realized; meanwhile, the variety and quantity of surface functional groups of the phoenix tree leaves are increased; and more specific surface area and active adsorption sites are endowed to modified phoenix tree leaves. The method provided by the invention can improve the adsorption capacity of the phoenix tree leaves to hexavalent chromium, and can realize resourceful utilization of wastes.

Description

Technical field [0001] The invention belongs to the technical field of groundwater purification, and specifically relates to a method for making porous materials for removing chromium pollution in water from modified sycamore leaves with concentrated sulfuric acid. It can be used as a remediation technology for solving groundwater hexavalent chromium pollution. The problem. Background technique [0002] Water resources are precious ecological resources for human beings, but at present, the unreasonable discharge and leakage of chromium have caused serious water pollution problems, posing a threat to human health. If no corresponding measures are taken to remove it from the groundwater, it will seriously affect the safety of the environment and ecology. [0003] Biomass adsorption is a natural process based on ion exchange, micro-precipitation, adsorption, coordination and complexation on the surface of biomass materials to remove heavy metals in water. It is a relatively new metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324B01J20/20C02F1/28C02F1/62
CPCB01J20/20C01B32/324C02F1/281C02F1/62C02F2101/22
Inventor 李淼张菀李佳澄刘翔
Owner TSINGHUA UNIV