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Method for treating polluted water by utilizing solid waste steel slag

A technology for steel slag and water body, applied in the field of resources and environment, can solve the problems of heavy metal enrichment, water body pollution, affecting the comprehensive utilization of water resources, etc., and achieves the effects of low treatment cost, simple and convenient operation, and good treatment effect.

Inactive Publication Date: 2016-08-17
YUNNAN HUAYUN TIANLANG ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Since the existing technology cannot efficiently and cheaply solve sewage eutrophication and heavy metal pollution, resulting in a series of problems such as serious water pollution and heavy metal enrichment, which directly affect the comprehensive utilization of water resources, the present invention provides a method that can treat eutrophication Effective and economical treatment of water bodies polluted with heavy metals to avoid water body deterioration and heavy metal enrichment

Method used

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  • Method for treating polluted water by utilizing solid waste steel slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Water samples from the Tanglangchuan River in Anning, Kunming, Yunnan (COD: 36.69mg / L, TP: 0.258mg / L, TN: 1.383mg / L) were intercepted by conventional grids to remove particulate impurities in the wastewater, Ensure that the wastewater can meet the requirements of adsorption treatment, and the pH of the river water is neutral without adjustment;

[0026] (2) In the wastewater pretreated in step (1), add the modified steel slag in an amount of solid-liquid ratio of 30g / L, then carry out the adsorption reaction at room temperature for 120min at a shaking stirring speed of 200r / min, and then Conventional filtration solid-liquid separation, get water.

[0027] The modified steel slag is made by adding nitric acid with a concentration of 40v / v%, modifying according to the ratio of steel slag to acid volume of 1:3, washing with water until neutral, and then drying in an oven at 90°C.

[0028] Final test: COD is 17.98mg / L, removal rate is 50.99%; total phosphorus is not de...

Embodiment 2

[0030] (1) Take the water sample 1 sent for inspection by a certain unit as an example: pH=1.62, COD is 99mg / L, As0.8674mg / L, Pb0.508mg / L, and the particles in the wastewater are removed by conventional filtration Impurities, to ensure that the wastewater can meet the requirements of adsorption treatment, and add potassium hydroxide solution to adjust the pH of the wastewater to 7.97;

[0031] (2) Add the modified steel slag to the wastewater pretreated in step (1) at a solid-to-liquid ratio of 25g / L, then carry out adsorption reaction for 60min at a shaking stirring speed of 180r / min, and then undergo a conventional Suction filtration solid-liquid separation, get water.

[0032] The modified steel slag is made by adding nitric acid with a concentration of 90v / v%, modifying according to the ratio of steel slag to acid volume of 1:4, washing with water to neutrality, and then drying in an oven at 80°C.

[0033] The final effluent COD is 5.44mg / L, the removal rate is 94.51%, As...

Embodiment 3

[0035] (1) Take the water sample 2 sent for inspection by a certain unit as an example: pH=2.04, COD is 20mg / L, As0.8598mg / L, Pb0.22mg / L, and the particles in the wastewater are removed by conventional filtration impurities, to ensure that the wastewater can meet the requirements of adsorption treatment, and add sodium hydroxide solution to adjust the pH of the wastewater to 6.35;

[0036](2) In the wastewater pretreated in step (1), add the modified steel slag according to the solid-liquid ratio of 35g / L, then carry out the adsorption reaction for 100min at the shaking stirring speed of 150r / min, and then pass through the conventional Suction filtration solid-liquid separation, get water.

[0037] The modified steel slag is made by adding nitric acid with a concentration of 70v / v%, modifying according to the ratio of steel slag to acid volume of 1:4, washing with water until neutral, and then drying in an oven at 80°C.

[0038] The final effluent COD is 6.63mg / L, the removal...

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Abstract

The invention discloses a method for treating polluted water by using solid waste steel slag. The present invention modifies steel slag, an industrial solid waste environmental protection material, and adopts steel slag adsorption method to treat eutrophic water and water polluted by heavy metals, which can effectively degrade TP, TN, As, Pb, COD in sewage etc., can effectively improve eutrophic water bodies and water bodies polluted by heavy metals, and can be directly applied to the treatment of urban rivers, lakes, and groundwater, effectively solving the current water pollution problems caused by urban construction and development.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and in particular relates to a method for treating polluted water bodies with solid waste steel slag. Background technique [0002] Nitrogen, phosphorus and heavy metal ions are the main pollutants in soil and water bodies. The former is also the chief culprit of eutrophication in water bodies. They are mainly caused by non-ferrous smelting, electroplating, chemical industry, printing and dyeing, mining and other industries discharged into water bodies. After being discharged into the environment as pollutants, nitrogen and phosphorus will cause eutrophication of the water body, resulting in foul odor of the water body; heavy metal ions cannot be degraded by microorganisms, and can only undergo mutual transformation, dispersion and enrichment between forms, and transfer enrichment along the biological chain , and eventually enter the human body from aquatic products and plants, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16C02F101/20
CPCC02F9/00C02F1/001C02F1/281C02F1/44C02F1/52C02F1/66C02F2001/007C02F2101/105C02F2101/16C02F2101/20C02F2209/08C02F2209/16
Inventor 杨鑫博刘缘缘潘凡李忠林周洲姜永华
Owner YUNNAN HUAYUN TIANLANG ENVIRONMENTAL PROTECTION
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