Arsenic comprising groundwater processing method

A treatment method and technology for groundwater, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as the inability to ensure the removal of other pollutants, the inability to ensure the treatment capacity, and the complex operation and management. , to achieve long-term stability of arsenic removal effect, excellent arsenic removal efficiency and broad-spectrum adaptability.

Inactive Publication Date: 2009-04-22
北京精密单因子水工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various methods have their own advantages and disadvantages, but these methods are either due to poor treatment effects, or because of high treatment and regeneration costs, complex operation and management, or because of saturated treatment

Method used

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  • Arsenic comprising groundwater processing method
  • Arsenic comprising groundwater processing method
  • Arsenic comprising groundwater processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this example, the raw water contains 100 μg / L As(III) and does not contain Fe(II) and Mn(II).

[0031] Pump the composite high-efficiency oxidation flocculant into the raw water under the condition of sufficient stirring, and the composite high-efficiency oxidation flocculant is composed of 0.17mg / L potassium permanganate and 1.02mg / L ferric chloride.

[0032] Figure 1, figure 2 As shown, in the mixing reactor 1, under the condition of sufficient stirring, the composite high-efficiency oxidation flocculant is pumped into the arsenic-containing groundwater for mixing, and the residence time of the arsenic-containing groundwater is 30 seconds; in the flocculation reactor 2, flocculation, adsorption, Co-sedimentation and other physical and chemical processes, the residence time of arsenic-containing groundwater is 15 minutes. Afterwards, enter the composite double-layer filter column 3 to filter, wherein the composite double-layer filter column 3 upper layer is a granu...

Embodiment 2

[0034] In this example, the raw water contains 100 μg / L As(III) and does not contain Fe(II) and Mn(II).

[0035] Pump the composite high-efficiency oxidation flocculant into the raw water under the condition of sufficient stirring, and the composite high-efficiency oxidation flocculant is composed of 0.17mg / L potassium permanganate and 1.02mg / L ferric chloride.

[0036] As shown in Figure 3, figure 2 As shown, in the mixing reactor 1, under the condition of sufficient stirring, the composite high-efficiency oxidation flocculant is pumped into the arsenic-containing groundwater for mixing, and the residence time of the arsenic-containing groundwater is 30 seconds; in the flocculation reactor 2, flocculation, adsorption, Co-sedimentation and other physical and chemical processes, the residence time of arsenic-containing groundwater is 15 minutes. Afterwards, enter the composite double-layer filter column 3 to filter, wherein the composite double-layer filter column 3 upper laye...

Embodiment 3～31

[0038] Other conditions remain unchanged, according to the main water quality indicators of raw water, determine the composition of the composite high-efficiency oxidation flocculant, and its treatment effect is shown in Table 2 on the next page.

[0039] Table 2 Treatment effect of the present invention

[0040]

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Abstract

Disclosed is an arsenic-containing groundwater processing method, which comprises pumping highly performance composite oxidization flocculating agent into arsenic-containing underground water, sufficiently stirring, mixing and carrying out flocculation reaction, filtering with composite filtering column with double layer filtering material. The indexes of the disposed water, such as As, Fe, Mn, cloudiness, chromaticity and CODMn can meet the national standard for drinking water.

Description

technical field [0001] The invention relates to a treatment method for toxic elements in groundwater, in particular to a treatment method for arsenic-containing groundwater. Background technique [0002] At present, arsenic mainly exists in natural water bodies in two forms: arsenate (As(V)) and arsenite (As(III)). Under reducing groundwater conditions, arsenic(III) is the main form. Compared with arsenic (V), arsenic (III) is more toxic, has poorer affinity to soil, sediment and metal oxides, and is more difficult to remove. [0003] At present, the main methods for removing arsenic in water are as follows: sedimentation and co-sedimentation, adsorption, ultrafiltration, ion exchange, etc. Various methods have their own advantages and disadvantages, but these methods are either due to poor treatment effects, or because of high treatment and regeneration costs, complex operation and management, or because of saturated treatment capacity, long-term and efficient treatment c...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04C02F1/52C02F1/72C02F1/58B01D39/02B01D24/10
Inventor 李圭白刘锐平李虹李星夏圣骥
Owner 北京精密单因子水工程技术有限公司
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