Method for removing arsenium from water body by macroporous resin adsorption process

A technology of macroporous resin and adsorption method, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc. Resin adsorption capacity and other issues, to achieve the effect of low cost, no secondary pollution, and low residual arsenic content

Inactive Publication Date: 2013-08-07
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the adsorption method is that there is a strong adsorption between the adsorbent and the arsenic compound, which often makes the regeneration, recovery and reuse of the adsorbent difficult.
[0010] And the application number: 201

Method used

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  • Method for removing arsenium from water body by macroporous resin adsorption process
  • Method for removing arsenium from water body by macroporous resin adsorption process
  • Method for removing arsenium from water body by macroporous resin adsorption process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The experimental raw material: an arsenate solution prepared with local tap water, with an initial total arsenic content of 1500.0 μg / L.

[0042] Loading pretreatment conditions: D401 macroporous resin was selected and treated with different concentrations of ethanol, hydrochloric acid and NaOH. Other pretreatment conditions are the same.

[0043] The influence of different pretreatment conditions on the final adsorption effect is shown in image 3 , 4 with Figure 5 .

[0044] Depend on image 3 , 4 , 5. It can be seen that different pretreatment agent concentrations have a regular influence on the final arsenic removal effect. Considering the combination of cost reduction, industrial promotion factors and influence, the pretreatment agent concentration is finally determined to be 10-90% ethanol , 0.095-0.95mol / L hydrochloric acid and 0.1-1.0mol / L NaOH, and after combining the optimal conditions, the concentration of residual arsenic can be reduced to below 10μg...

Embodiment 2

[0046] The pretreated D401 macroporous resin is loaded with a 0.02-0.29 mol / L solution containing a zirconium compound, and after loading, the preparation solution with an initial pentavalent arsenic concentration of 950.0 μg / L is treated.

[0047] When other conditions such as adsorption time and temperature are the same, the effect of different concentrations of zirconium solutions on the loading effect is shown in Image 6 (Evaluation is based on the adsorption effect on arsenic under the same conditions).

[0048] Image 6 It shows that the solution concentration of different zirconium-containing compounds has an impact on the loading effect, and will eventually affect the arsenic removal effect. After sufficient time and adsorption under optimal conditions, the concentration of remaining arsenic can be reduced to below 10 μg / L.

Embodiment 3

[0050] The loaded macroporous resin is dried in a drying oven at 5-35°C for a drying time of 0-20 hours, and then the pentavalent arsenic solution is adsorbed (the initial total arsenic concentration is 985.0 μg / L).

[0051] Under the same conditions of arsenic solution adsorption time, solution temperature, solution pH, stirring intensity and other influencing factors, see Figure 7 , 8 .

[0052] Figure 7 with Figure 8 It can be seen that different drying temperatures and drying times have an impact on the loading effect, which in turn will affect the arsenic removal capacity and effect of the resin, but after treatment under the optimal drying temperature and drying time conditions, the concentration of residual arsenic after adsorption Very low, has reached drinking water standards.

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Abstract

The invention discloses a method for removing arsenium from a water body by a macroporous resin adsorption process, which comprises the following steps: pretreating a macroporous resin, and carrying out coprecipitation carrying treatment on a zirconium-compound-containing compound; and carrying out adsorption on a water body of which the trivalent arsenium or quintavalent arsenium content is 10-5000 mu g/L with the carried macroporous resin to lower the total arsenium content to less than 10 mu g/L. The resin can be recovered with NaOH, and the recovery rate of the resin is higher than 95%. The method has the advantages of high arsenium removal efficiency and simple technological operation, and can easily implement industrialization.

Description

technical field [0001] The invention relates to a method for removing arsenic in water, more specifically a method for removing arsenic in water by macroporous resin adsorption. Background technique [0002] Arsenic is a highly toxic protoplasmic poison. Arsenic pollution in water has become a global pollution problem and has attracted widespread attention from all walks of life. There are many forms of arsenic in the water environment. The most common forms in natural waters are arsenate and arsenite. If management is not strict or treatment is not up to standard, arsenic pollution in water will become one of the biggest threats to human health. . [0003] Arsenic has a strong accumulation in the human body. If the human body is exposed to arsenic-containing environment for a long time, or takes excessive arsenic for a long time, it will cause blood vessel disorder, and it is easy to suffer from blackfoot, skin cancer, lung cancer, etc., and increase the risk of cancer. p...

Claims

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Application Information

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IPC IPC(8): C02F1/42C02F1/58
Inventor 李长海贾冬梅刘学文李跃金商希礼徐伟
Owner BINZHOU UNIV
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