Filter material having a function of adsorbing and fixing arsenic and heavy metals
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United States of America Patent
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Jun 5, 2018
Issued Date -
Feb 25, 2016
app pub date -
Sep 2, 2013
filing date -
Jul 12, 2013
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Abstract
A filter material having a function of adsorbing and fixing arsenic and heavy metals and usage thereof. The filter material includes a porous ceramic substrate with porosity of 35%-85%, and zero-valent iron nanoparticles formed in situ within the porous ceramic substrate. The porous ceramic substrate has micropores of 2-10 micron, and fluffy amorphous silicon-iron-carbon structure is formed within each micropore. At least 25 wt % of ceramic component constituting the porous ceramic substrate is diatomaceous earth, and the fluffy amorphous silicon-iron-carbon structure within the micropore can form an adsorption film after water absorption. In the microstructure, the filter material obtained is configured as a porous and fluffy nose-like filter structure and generates an adsorption film, thereby greatly improving adsorption efficiency and adapting to changes in water quality and chemical environment. The used filter material will not fall off and no heavy metal will be separated therefrom, thereby ensuring the security of use.
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