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Arsenic removing apparatus for drinking water

A drinking water and water inlet technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult regeneration, short service life of adsorption materials, arsenic pollution in drinking water, etc. , to achieve the effects of fast adsorption/desorption rate, mild reaction conditions and simple preparation method

Inactive Publication Date: 2011-04-06
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] ●It cannot meet the actual situation of complex groundwater quality in China, or the actual operation effect is unstable;
[0014] ●The fixed investment and operating costs are relatively high, and some adsorption materials have a short service life and are not easy to regenerate;
[0015] ●Cannot remove As(III) and As(V) at the same time
[0016] Therefore the present invention is aimed at the problem that existing treatment technology exists, aims at developing a kind of economical and practical high-efficiency nanoscale adsorbent and device thereof suitable for my country's high arsenic (As(III) and As(V)) groundwater, to solve Difficulties in the treatment of arsenic pollution in drinking water in some areas of my country

Method used

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  • Arsenic removing apparatus for drinking water
  • Arsenic removing apparatus for drinking water
  • Arsenic removing apparatus for drinking water

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] Preparation of nano-adsorbent material in the filter element on the left:

[0058] At room temperature, the prepared nanometer adsorption material is used for intermittent arsenic removal. Pass the water sample with arsenic concentration of 2000μg / L through the column, the removal rate of arsenic is as high as 99.5%, and the concentration of arsenic in the effluent is less than 10μg / L, which meets the new arsenic content standards established by the European Union and the United States.

Embodiment 1

[0060] The selected materials are: choose different matrix activated carbon: coconut shell carbon (pore volume is 0.326cm 3 / g), coal-based carbon (pore volume is 0.145cm 3 / g), bone charcoal (pore volume is 0.250cm 3 / g); ferric chloride, potassium borohydride, organic solvents (common), monoalcohols (C 1 -C 10 ), low-carbon polyol series (C 1 -C 10 ), polyethylene glycol series (200-40000), anaerobic water, inert gas (common), etc.

[0061] The specific steps are:

[0062] (1) select commercially available coconut shell charcoal (the pore volume is 0.326cm 3 / g), coal-based carbon (pore volume is 0.145cm 3 / g), bone charcoal (pore volume is 0.250cm 3 / g) and other activated carbon materials, washed 3 times with deionized water, and then ultrasonically treated for 30min;

[0063] (2) At room temperature, in a 250ml three-neck flask equipped with a magnetic stirrer, activated carbon, and a dropping funnel, add 30 ml of 0.15M ferric chloride solution (coconut shell cha...

Embodiment 2

[0069] The selected material is: activated carbon (obtained from coal-based carbon treatment, with a pore volume of 0.168cm 3 / g), ferrous sulfate, potassium borohydride, organic solvent (common), ethanol, glycerin, polyethylene glycol 200, polyethylene glycol 4000, anaerobic water, inert gas (common), etc.

[0070] The specific steps are:

[0071] (1) Select the pore volume as 0.168cm 3 / g of commercially available coal-based activated carbon, washed 3 times with deionized water, and then sonicated for 30 min;

[0072] (2) At room temperature, in a 250ml there-necked flask equipped with a magnetic stirrer, gac, and dropping funnel, add 30 milliliters of 0.2M ferrous sulfate solution (soak the coal-based charcoal in advance for 60 minutes with ferrous sulfate), Then 45 ml of dispersant (ratio 1 of ethanol, glycerol, polyethylene glycol 200 and 4000 is 1:1:1, ratio 2 is 2:2:0.5, ratio 3 is 2:1:0.1) is added.

[0073] (3) Under the protection of inert gas (flow rate 60 ml / min...

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Abstract

The invention relates to the removal of arsenic in drinking water, in particular to a drinking-water arsenic-removing device which comprises a closed hollow cylinder; the upper part of the cylinder is provided with a water outlet, and the lower part of the cylinder is provided with a water inlet; two cylindrical filter elements are vertically arranged inside the cylinder in parallel; the bottom of the filter element on the right is communicated with the water inlet of the cylinder, and the top thereof is provided with a water outlet; the middle and upper part, the middle part and the middle and lower part of the filter element on the right are respectively provided with a detachable hole-born supporting board along radial direction; the three supporting boards divide the cavity in the filter element on the right into four parts which are a filter bed A, a filter bed B, a filter C and a filter D from top to bottom; the bottom of the filter element on the left is provided with a water inlet, and the top of the filter element on the left is communicated with the water outlet of the cylinder; and loaded drinking-water arsenic-removing nano-adsorbing agent is filled in the filter element on the left. The arsenic-removing device has wide application range and can reduce arsenic content in the drinking water to safe standard, thus being suitable for the drinking requirement of scattered towns and citizens.

Description

technical field [0001] The invention relates to the removal of arsenic in drinking water, in particular to a device for removing arsenic in drinking water. Background technique [0002] Arsenic is one of the highly toxic elements. In recent years, the pollution of arsenic in groundwater has attracted widespread attention. The arsenic content in groundwater in Taiwan, Xinjiang and Inner Mongolia in my country has seriously exceeded the standard, and the arsenic content can reach up to 2000 μg L -1 , the areas affected by arsenic pollution in groundwater amount to more than ten provinces and autonomous regions, with a population of more than 15 million; countries with serious arsenic pollution in groundwater in the world include India, Bangladesh, Vietnam, Argentina, Chile, Mexico, Hungary, etc. Long-term arsenic exposure can cause cancer of the skin, lungs, liver, kidneys and bladder. The World Health Organization revised the maximum allowable concentration of arsenic in dri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/28
Inventor 朱慧杰贾永锋
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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