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Liquid adsorbent and method for controlling arsenic pollution of lake water

A liquid adsorbent, arsenic pollution technology, applied in the field of treatment, can solve the problems of difficult to fully adjust the pH value, increase the cost of adsorption materials, etc., and achieve the effect of strong adsorption and precipitation, convenient use and operation, and less dosage.

Inactive Publication Date: 2009-12-16
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for large water bodies, it is difficult to fully adjust the pH value, and fluoride exists in a specific environment, adding any reagent before removing arsenic will increase the cost of adsorption materials

Method used

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  • Liquid adsorbent and method for controlling arsenic pollution of lake water
  • Liquid adsorbent and method for controlling arsenic pollution of lake water
  • Liquid adsorbent and method for controlling arsenic pollution of lake water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Fe for liquid adsorbent 2 (SO 4 ) 3 Mix well with tap water or deionized water, and its mass concentration is 200g / L. Take 50 liters of Yangzong seawater sample with an arsenic concentration of 0.110 mg / L and fill it in a plastic barrel with a diameter of 38 cm and a height of 56 cm. Take out 2 mL of the adsorbent solution in a glass beaker, dilute the solution to 20 mL with tap water, then spray the surface of the experimental water in the plastic bucket with an atomizer, and stir gently for 2 minutes. At 5 hours a water sample was taken from the bucket, filtered and tested by atomic fluorescence spectroscopy. As a result, the concentration of arsenic has dropped to 0.004mg / L, and the removal rate of arsenic is 96.4%. Continue to use 2mL of high-concentration liquid adsorbent, repeat the above dilution, spraying and stirring operations, and take a sample after 6 hours of aging for analysis. The arsenic concentration is still 0.004mg / L, indicating that 50 liters of ...

Embodiment 2

[0039] FeCl for liquid adsorbent 3 Mix well with tap water or deionized water, and its mass concentration is 400g / L. The operating procedure is the same as that described in Example 1, but the amount of liquid adsorbent solution added is only 1 mL, and after dilution to 10 mL, the surface of a bucket of experimental water is sprayed and stirred slightly for 2 minutes. The concentration of arsenic was 0.008mg / L when the sample was analyzed after 6 hours, and the arsenic removal rate was 92.7%. 5 , that is, 1 ton of adsorbent solid can treat 180,000 cubic meters of lake water.

Embodiment 3

[0041] The operating procedure is the same as that described in Example 2, but the amount of the liquid adsorbent solution added is only 0.5 mL, and after dilution to 10 mL, the surface of a bucket of experimental water is sprayed and stirred slightly for 2 minutes. The concentration of arsenic was 0.006mg / L when the sample was analyzed after 6 hours, and the arsenic removal rate was 94.5%. 5 , That is, 1 ton of adsorbent solid can treat 360,000 cubic meters of lake water.

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Abstract

The invention provides a liquid adsorbent and a method for controlling arsenic pollution of lake water, which relates to large-scale treatment of arsenic-polluted water. The adsorbent is reserve liquid formed by compounding iron salts FeCl3 or Fe2(SO4)3 or adding an appropriate amount of aluminum salts AlCl3 or Al2(SO4)3 with tap water or deionized water, and the mass concentration of the adsorbent is 100 to 600 g / L. The adsorbent in use is diluted by 10 to 30 times and then sprayed on the arsenic-polluted water. The adsorbent has the advantages of safety, low price, high arsenic removal efficiency and easy operation. A Yangzonghai arsenic-polluted water sample treated with the invention is detected through graphite furnace atomic absorption spectrometry and atomic fluorescence spectrometry, and detection results show that the arsenic removal rate of the invention can be greater than 92.7 percent, and the invention can reduce arsenic concentration from 0.110-0.130 mg / L to 0.003-0.008 mg / L which is lower than 0.050 mg / L specified by the national drinking water health standard (GB5749-2006) and 0.010 mg / L specified by the WHO drinking water quality standard.

Description

technical field [0001] The invention belongs to the treatment of water pollution, in particular to an adsorbent and a treatment method for large water bodies polluted by arsenic. Background technique [0002] Arsenic is the fourth period element in Group V of the main group elements in the periodic table, with a relative atomic mass of 74.921. Both arsenic and arsenic soluble compounds are highly toxic. Trivalent arsenite, pentavalent arsenate and oxides that enter the food chain through wastewater and polluted soil can cause liver, kidney and lung cancer. In addition to the geochemical reactions of arsenic-containing soil and rocks, arsenic in water mainly comes from arsenic-containing wastewater and waste discharged from industry, mining and smelting, such as arsenic pollution in Yangzonghai, Datunhai, Anhui Chaohu, and Jiangsu Taihu Lakes . For the treatment of arsenic pollution in large-scale surface water bodies, such as "A method for controlling arsenic pollution in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02C02F1/28C02F1/58
Inventor 陈景张曙常军向星王世雄王茺
Owner YUNNAN UNIV
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