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Slurry for treatment of oxyanion contamination in water

A technology for polluting water and slurry, applied in water pollutants, water/sewage treatment, polluted waterway/lake/pond/river treatment, etc., can solve problems such as transportation difficulties

Pending Publication Date: 2020-02-14
PHOSLOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A notable difficulty with prior art materials is that of transportation, since the remedial materials are slurries, the transportation of which involves considerable volumes of water (in which the improved clay material described in this patent is suspended)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The inventive slurries were prepared by obtaining samples of crude bentonite from Wyoming USA and China which, when tested by XRF, exhibited properties of major and minor elemental composition most suitable for sodium activation.

[0022] First one kg of coarse bentonite was crushed by hand and placed in a laboratory paste mixer, to which was added a sodium carbonate solution which gave a sodium content in excess of 3.00% sodium in the form of disodium monoxide and 35 % moisture content.

[0023] The resulting mixture was mulled until a consistent texture was obtained in which the bentonite was sufficiently wetted and mixed with the sodium carbonate solution. The mulling process reduces the particle size of the bentonite to maximize the surface area available for exposure to sodium carbonate, thereby maximizing the cation exchange of sodium with the bentonite. The mixture was then fed to a 50mm screw extruder with a 4mm orifice, which provided further mixing and shear ...

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Abstract

The invention relates to a method for repairing polluted water with oxyanion contamination. The method comprises the steps of selecting a swellable bentonite containing at least 0.5% sodium in the form of disodium monoxide; treating the swellable bentonite with a sodium salt to produce a sodium activated bentonite having more than 3% sodium in the form of disodium monoxide; mixing the sodium activated bentonite with water to produce a sodium activated slurry; exchanging at least some of the sodium of the sodium activated bentonite with a rare earth salt selected from the group consisting of lanthanum, cerium and dysprosium salts to produce a rare earth exchanged slurry consisting of rare earth exchanged bentonite and water, wherein the rare earth exchanged bentonite having a rare earth salt incorporated therein, the slurry has a plurality of active chelating sites, and the plurality of active chelating sites are used for chelating oxygen-containing ions; and distributing the rare earthexchanged slurry in the polluted water. The method can effectively treat polluted water.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 22, 2013, an invention titled "Slurry Used to Treat Oxygen Ion Pollution in Water", and an application number of 201310093981.4. technical field [0002] The present invention relates to slurries for treating oxygen ion contamination in water. The present invention is particularly suitable for treating oxygen ion pollution in large bodies of water, ie water bodies having a scale in the kilometer range and above, which is described in more detail below. However, the invention is not limited to these waters. The present invention is an improvement over the slurry described in US Patent No. 6,350,383, but is not to be considered limited on this basis. Background technique [0003] Eutrophication of naturally and artificially produced waters sometimes leads to hypoxia to such an extent that the conditions of flora and fauna in and around these waters are adve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/42C02F1/28B01J20/12B01J20/30C02F101/10
CPCC02F1/42C02F1/281C02F2103/007C02F2101/105B01J20/12
Inventor A.E.韦恩克斯
Owner PHOSLOCK