Modified bentonite load nanometer iron material and preparation method thereof

A technology of bentonite and nano-iron, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of low utilization rate of zero-valent iron, increase the length of packed columns, etc., and achieve strong reduction Ability and adsorption capacity, the effect of strong adsorption capacity
CN103464091AInactive Publication Date: 2013-12-25WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2013-12-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a modified bentonite load nanometer iron material and a preparation method thereof. According to the technical scheme, the preparation method includes the steps of stirring bentonite and bivalent iron salt solutions to prepare the mixed liquor of the bentonite and the bivalent iron salt solutions, wherein the mass ratio between an iron element and the bentonite is 1: (1-2), then dropwise adding reducing agent solutions to the mixed liquor of the bentonite and the bivalent iron salt solutions and stirring to prepare mixed liquor containing bentonite load nanometer iron, and adding alkyl quaternary ammonium salt solutions into the mixed liquor containing the bentonite load nanometer iron and stirring, wherein the volume ratio between the mixed liquor containing the bentonite load nanometer iron and modifying agent solutions is 1: (0.15-0.20), and the steps are all carried out in a nitrogen environment; then carrying out suction filtration, drying and grinding the obtained solid in a vacuum environment to obtain the modified bentonite load nanometer iron material. The modified bentonite load nanometer iron material prepared by the preparation method has strong reducing capacity and adsorption capacity, and is suitable for removing heavy metal chromium (VI) and heavy metal arsenic (V), wherein the heavy metal chromium (VI) and the heavy metal arsenic (V) exist in water in an anionic form.
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Description

technical field

[0001] The invention relates to the technical field of a sewage treatment agent. In particular, it relates to a modified bentonite loaded nano-iron material and a preparation method thereof. Background technique

[0002] Heavy metals chromium and arsenic, especially hexavalent chromium and pentavalent arsenic, mainly exist in the form of anions in surface water and groundwater, which are more harmful to human body. At present, the treatment methods of wastewater containing chromium and arsenic mainly include chemical precipitation, ion exchange and membrane separation. The chemical precipitation method is mainly to add calcium hydroxide to the wastewater, but if the dosage of calcium hydroxide is too large, a large amount of sludge containing heavy metals will be produced; the ion exchange method is complicated and the resin is easy to age; the cost of the membrane separation method is too high, and the membrane The holes are prone to clogging. Searching f...

Claims

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