Treating agent of a polluted water containing a heavy metal and treating method

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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Problems solved by technology

[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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