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Treating material for polluted water, method for production thereof and use thereof

A sewage and inorganic fiber technology, which is applied in water/sewage treatment, biological water/sewage treatment, adsorbed water/sewage treatment, etc. It can solve the problem of no mention of waste water treatment, and achieve the effect of high water permeability and good reactivity

Inactive Publication Date: 2007-12-19
NIPPON STEEL CHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned documents disclose only the purification of polluted soil, and do not mention the treatment of waste water containing harmful substances such as arsenic

Method used

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  • Treating material for polluted water, method for production thereof and use thereof
  • Treating material for polluted water, method for production thereof and use thereof
  • Treating material for polluted water, method for production thereof and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 75 g of stone wool (manufactured by Shinnichiwa Stone Wool Co., Ltd., S-Fiber granular cotton, with an average particle diameter of 30 mm), nickel slag wool (manufactured by Pacific Metal Co., Ltd., granular wool, with an average particle diameter of 30 mm), glass wool (without resin short fibers), carbon fibers (pitch-based short fibers), or quartz fibers (tissue culture short fibers) as the inorganic fibers. Use the reagents ferrous sulfate, gypsum and sulfuric acid, add them to 5L of acidic solution with pH 2, total iron ion 340mg / l, calcium ion 250mg / l, sulfate ion 2000mg / l, and let it react for 28 days at room temperature.

[0059] At this time, the adhesion rate of the iron component to each inorganic fiber and the pH of the solution after the reaction were measured. In order to observe the adhesion of the iron component to the surface of the fiber, the solution was stirred for 5 minutes, and the separation state of the fiber and the reaction product was confirmed v...

Embodiment 2

[0061] The same experiment was carried out as in Example 1, except that 15 g of biological material containing iron-oxidizing bacteria-Thiobacillus ferrooxidans was added.

[0062] Table 1 shows the adhesion rate of the iron component to the fiber and the pH of the solution. In addition, in Table 1, RW is stone wool, NW is nickel slag wool, GW is glass wool, CF is carbon fiber, SF is quartz fiber, S+G is a mixture of low crystallinity hydrous iron sulfate mineral and goethite, - indicates that the product is too small to be measured.

[0063] Table 1

[0064] Example 1

Embodiment 3

[0066] Using stone wool (S-Fiber granular cotton, average particle size 30 mm), slag cement (manufactured by Nippon Steel Slag Cement Co., Ltd., type B slag cement), 60% by weight of stone wool and 40% by weight of slag cement were mixed with a ribbon mixer. % Stir and mix to obtain a granular mixture with an average particle diameter of 20mm, a volume specific gravity of 0.15, and a void ratio of 94%. The chemical composition of the granular mixture is SiO 2 : 33.0%, Al 2 o 3 : 10.2%, CaO: 47.8%, MgO: 4.2%, Fe 2 o 3 : 1.4%, TiO 2 : 0.5%, MnO: 0.2%, SO 3 : 0.7%, Ig.loss: 1.2%.

[0067] Separately, ferrous sulfate, gypsum, and sulfuric acid were used to prepare an acidic solution at pH 2.5 containing 1,080 mg / l of sulfate ions, 137 mg / l of total iron ions, and 250 mg / l of calcium ions.

[0068] 100 g of the granular mixture was packed into a synthetic resin column with a diameter of 10.4 cm to have a thickness of 6.8 cm and a volume specific gravity of 0.174, and the aci...

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Abstract

A treating material for treating a polluted water containing, as a hazardous substance, arsenic, lead, cadmium, antimony, uranium, phosphorus, fluorine or the like, which comprises an oxygen-containing iron compound carried on a material containing a silicic acid based fiber or a silicate based fiber; a method for producing the treating material which comprises contacting and reacting a silicate based fiber, such as rock wool, with an iron-containing acidic water; and a method for treating the polluted water witch comprises contacting the treating material with the polluted water. The treating material has a fine structure wherein the above oxygen-containing iron compound is attached in a sheath form on the surface of a fiber reduced in an alkali component and increased in a silicic acid component as compared to, for example, rock wool. The oxygen-containing iron compounds include schwertmannite, ferrihydrite, akaganeite, amorphous hydrous iron oxide and fired ferric sulfate.

Description

technical field [0001] The present invention relates to a treatment material for removing harmful substances from sewage containing harmful substances such as heavy metals and a method for removing harmful substances using the treatment material. technical background [0002] A method of removing harmful substances in wastewater widely uses a method in which powder or slurry of slaked lime is added. For example, a treatment method is known in which arsenic-sulfuric acid-containing wastewater is first neutralized with calcium carbonate, slaked lime, etc., and then oxidized to neutralize the water once to oxidize the arsenic, followed by secondary neutralization with slaked lime, calcium carbonate, etc. deal with. Although this method has low reagent cost and strong arsenic removal ability, in the case of excessive sulfate ions and iron ions in the wastewater, the iron ions will be precipitated as iron hydroxide colloids as the pH value increases. In addition, Slaked lime or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/62C02F1/28B01J21/10B01J20/10C02F3/34
Inventor 大石彻高木良二山田胜弘池田省三
Owner NIPPON STEEL CHEMICAL CO LTD
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