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Preparation method of modified steel slag for removing arsenic from water body

A steel slag and modification technology, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of expensive preparation and complicated preparation process, and achieve easy-to-obtain raw materials, simple and convenient modification methods, and unique The effect of secondary pollution

Inactive Publication Date: 2018-05-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Although the above-mentioned materials for removing arsenic in water have a high removal rate for arsenic, their respective preparation processes are complicated or expensive, or minerals are used as raw materials

Method used

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  • Preparation method of modified steel slag for removing arsenic from water body
  • Preparation method of modified steel slag for removing arsenic from water body

Examples

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Embodiment 1

[0038] S100, taking 200g of steel slag and washing it with deionized water to near neutral pH, and drying it in a constant temperature drying oven at 105°C to a constant weight, the steel slag is 100-200 mesh, for use;

[0039] S200, first obtain a piece of rusted iron, soak it in tap water for about 7 days, filter the obtained water sample, and use this as the source water sample of microorganisms; prepare a selective medium, the composition of which is as follows: 0.5g / L NaNO 3 , 0.2g / LCaCl 2 ·2H 2 O, 0.5g / L KH 2 PO 4 ·3H 2 O, 0.5g / L (NH 4 ) 2 SO 4 , 0.5g / L MgSO 4 ·7H 2 O, 10g / LFeC 6 H 5 O 7 ·NH 4 OH (ferric ammonium citrate), 20g / L agar powder, and the corresponding enrichment medium; spread the source water sample on the selective medium, and invert the culture in a constant temperature incubator at 25°C until the surface of the medium grows White filamentous colonies; pick a single white filamentous colony and inoculate it on a new selective medium to contin...

Embodiment 2

[0042] S100, taking 200g of steel slag and washing it with deionized water to near neutral pH, and drying it in a constant temperature drying oven at 105°C to a constant weight, the steel slag is 100-200 mesh, for use;

[0043] S200, first obtain a piece of rusted iron, soak it in tap water for about 7 days, filter the obtained water sample, and use this as the source water sample of microorganisms; prepare a selective medium, the composition of which is as follows: 0.5g / L NaNO 3 , 0.2g / LCaCl 2 ·2H 2 O, 0.5g / L KH 2 PO 4 ·3H 2 O, 0.5g / L (NH 4 ) 2 SO 4 , 0.5g / L MgSO 4 ·7H 2 O, 10g / LFeC 6 H 5 O 7 ·NH 4 OH (ferric ammonium citrate), 20g / L agar powder, and the corresponding enrichment medium; spread the source water sample on the selective medium, and invert the culture in a constant temperature incubator at 25°C until the surface of the medium grows White filamentous colonies; pick a single white filamentous colony and inoculate it on a new selective medium to contin...

Embodiment 3

[0046] S100, taking 200g of steel slag and washing it with deionized water to near neutral pH, and drying it in a constant temperature drying oven at 105°C to a constant weight, the steel slag is 100-200 mesh, for use;

[0047] S200, first obtain a piece of rusted iron, soak it in tap water for about 7 days, filter the obtained water sample, and use this as the source water sample of microorganisms; prepare a selective medium, the composition of which is as follows: 0.5g / L NaNO 3 , 0.2g / LCaCl 2 ·2H 2 O, 0.5g / L KH 2 PO 4 ·3H 2 O, 0.5g / L (NH 4 ) 2 SO 4 , 0.5g / L MgSO 4 ·7H 2 O, 10g / LFeC 6 H 5 O 7 ·NH 4 OH (ferric ammonium citrate), 20g / L agar powder, and the corresponding enrichment medium; spread the source water sample on the selective medium, and invert the culture in a constant temperature incubator at 25°C until the surface of the medium grows White filamentous colonies; pick a single white filamentous colony and inoculate it on a new selective medium to contin...

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Abstract

The invention relates to a preparation method of modified steel slag for removing arsenic from water body. The preparation method comprises the following steps: cleaning the steel slag, and drying thesteel slag until the weight of the steel slag is constant for standby use; adding the steel slag which is dried to the constant weight into a culture solution comprising iron oxidizing bacteria, performing erosion soaking, and obtaining modified steel slag. The preparation method has the beneficial effects that the modified steel slag prepared by the invention has the characteristics that the modification method is simple, the cost is low, raw materials are easy to obtain, and the effect for removing arsenic from water is apparent; compared with the original steel slag, the adsorption capacity of the modified material for the arsenic is increased by 32.2 to 41.3 percent; in addition, the adsorption effect is little influenced by the temperature, the adsorbed arsenic cannot be desorbed inneutral water after the saturated adsorption, the modified steel slag is high in arsenic removal efficiency and high in saturated adsorption capacity, the material is stable after the adsorption, thesecondary pollution is avoided, and the recycling of solid waste is realized.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of modified steel slag for removing arsenic from water. Background technique [0002] The abundance of arsenic in the earth's crust is not high, but due to hydrogeological reasons, the arsenic in water bodies in some areas is abnormally enriched under natural conditions, so that the arsenic content in drinking water exceeds the standard. In addition, human production activities, especially the large-scale mining and use of lean ores, have also caused a large amount of arsenic to be developed into the environment along with the main element. Cases of arsenic poisoning in drinking water have been found in Inner Mongolia, Xinjiang, Shanxi, Guizhou, Taiwan and other places in my country. Therefore, how to remove arsenic in water is the focus of current research at home and abroad. [0003] At present, the relevant patent documents at home and abroad on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/0229B01J20/28057B01J2220/4875C02F1/281C02F2101/103
Inventor 黄永炳牛晨雨张得印吴畏涂书新
Owner WUHAN UNIV OF TECH
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