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Preparation and using methods for slurry type iron-based red mud arsenic removing agent

An application method and technology of red mud, applied in chemical instruments and methods, water/sludge/sewage treatment, other chemical processes, etc., can solve the problems of poor separation ability between floc and water body, difficulty in engineering application, low arsenic removal efficiency, etc. problem, to achieve the effect of not easy to dissolve again, stable form of arsenic

Inactive Publication Date: 2011-07-06
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The arsenic removal efficiency of simple adsorption method is lower than that of coagulation (precipitation) combined with adsorption arsenic removal efficiency
At the same time, some studies have used iron salt and arsenic coagula

Method used

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  • Preparation and using methods for slurry type iron-based red mud arsenic removing agent

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Embodiment Construction

[0017] The preparation method and application process example of the "slurry-type iron-based red mud arsenic adsorption agent" of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] figure 1 with figure 2 Respectively are the process flow diagrams of embodiment 1 and embodiment 2 of the present invention.

[0019] Present embodiment 1 and example 2 are made of ferrous solution dosing tank 1, red mud dosing tank 2, medicament mixing tank 3 ( figure 1 ) or drug mixing tube 3 ( figure 2 ), a mud pump 4, a reaction mixing tank 5, a settling tank 6 and pipelines connected to each other. Among them, the solid arrows in the pipeline indicate the direction of chemical agent and water flow, and the dotted arrows indicate the direction of sludge reuse and flow.

[0020] The working process of this embodiment is:

[0021] Through the medicine adding tank 1 and the medicine adding tank 2 to the medicament mixing tank 3 ( fi...

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Abstract

The invention relates to a preparation method and a using method for a slurry type iron-based red mud arsenic removing agent. The slurry type iron-based red mud arsenic removing agent is prepared by grinding sintering process or Bayer process red mud and manually or mechanically mixing the ground sintering process or Bayer process red mud with ferrous solution at a certain concentration. When used, the slurry type iron-based red mud arsenic removing agent is sprayed by a slurry pump or manually and mixed with water by a water flow or a mechanical force, so that arsenic contaminant in water can be eliminated after standing and precipitating. The chemical contains about 5 to 10 percent of ferrous, about 40 to 50 percent of red mud and about 50 to 55 percent of water. By combining the chemical with the action of arsenic absorption and iron and arsenic coprecipitation, the precipitation performance is high, the form of absorbing arsenic is stable, and secondary contamination is prevented. In the invention, industrial waste from aluminum smelting industry and cheap ferrite are adopted, so the water treatment cost is reduced greatly; and economic and social benefit is created particularly when the agent is used for treating industrial and mining high-arsenic waste water and other industrial and mining high-arsenic waste water and remediating large-area water arsenic contamination.

Description

technical field [0001] The invention belongs to the field of water treatment and resource reuse, and in particular relates to cheap, efficient and fast disposal materials for arsenic pollution in water bodies and its application technology, which can be applied to emergency treatment of water bodies when arsenic pollution accidents occur, and can also be applied to coagulation processes in water plants Routine arsenic removal. Background technique [0002] Arsenic is a metal-like element widely distributed in the atmosphere, water, soil, rocks and living organisms. Arsenic has been known for its toxicity since its discovery. Acute arsenic poisoning will occur when the human body is exposed to high concentrations of arsenic, and chronic poisoning will result from prolonged exposure to arsenic. Arsenic poisoning can seriously endanger the human body's respiratory, digestive, cardiovascular, nervous, urinary, hematopoietic and other systems, and even threaten human life. In ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/62B01J20/02
Inventor 栾兆坤李亦然王军贾智萍
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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