Treating agent of a polluted water containing a heavy metal and treating method
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A treatment method and technology of treatment agent, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of high adsorption efficiency
Active Publication Date: 2011-02-02
KOBE STEEL LTD
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[0013] In this technique, silica sand is exemplified as a particle size control material. By using such a particle size control material, improvement in water permeability can be expected, but the ratio of the adsorbent in the adsorption filler becomes small. The removal performance of heavy metals is high, and there is a problem that the compactness of the equipment cannot be achieved when the adsorption tower becomes too large
[0014] As mentioned above, when removing heavy metals from polluted water by the adsorption method, the adsorbent is required to have high adsorption efficiency, practical equipment scale, water flow conditions, and long-term durability. agent, it is not possible to realize all the adsorbents that can meet these required characteristics
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[0023] The purpose of the treating agent of the present invention is to burn iron powder containing sulfur to form a granular form. The firing method applied in the present invention is useful in obtaining porous particles from the iron powder raw material basically without using a binder. In this method, in order to obtain the above-mentioned particulate matter from the iron powder raw material containing sulfur, for example, the sulfur-containing iron powder obtained by the spraying method is put into a heating furnace in an atmospheric atmosphere or a reducing atmosphere, and heated to at least 900° C. The above temperature can be fired. Thereby, the contact points between the iron powder particles can be firmly fired in the presence of the sulfur component, and a porous and high-strength lump can be obtained. By pulverizing the agglomerate by an appropriate method and classifying with a sieve, particulate matter within a predetermined particle size range can be obtained. ...
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Abstract
The invention provides a treating agent capable of removing the heavy metal, such as an arsenic, a selenium, a lead, a cadmium and a chrome from the polluted water, so as to satisfy the required properties, such as the high absorbing efficiency, practical device scale, a water-through condition and a long-time durability and a treating method using the treating agent. The treating agent is used for removing the heavy metal from the polluted water containing at least one kind of heavy metal selected from the arsenic, the selenium, the lead, the cadmium and the chrome and the iron powder containing sulfur is burned into granular state and the treating agent contacts with the polluted water containing at least one kind of heavy metal selected from the arsenic, the selenium, the lead, the cadmium and the chrome, so as to remove the heavy metal in the polluted water at high efficiency.
Description
technical field [0001] The present invention relates to a method for efficiently removing heavy metals from groundwater, river water, lake water, and various industrial drainages polluted by heavy metals such as arsenic, selenium, lead, cadmium, and chromium (especially hexavalent chromium). treatment agent. In addition, in the present invention, "heavy metals of arsenic, selenium, lead, cadmium and chromium" means single metals, compounds (especially oxides), salts and ions of arsenic, selenium, lead, cadmium and chromium. Background technique [0002] Heavy metals such as arsenic, selenium, lead, cadmium, and chromium are harmful to the human body and cause health problems. Therefore, environmental pollution caused by these heavy metals has become a problem. Heavy metals are contained in groundwater, river water, lake water, various industrial drainage, etc., and determine environmental standards and drainage standards. When heavy metals in water exceed these water quali...
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