Method for removing bromate ion in drinking water

A bromate, drinking water technology, applied in chemical instruments and methods, ion exchange water/sewage treatment, water/sewage treatment and other directions, can solve the problems of many influences, increased chromaticity of effluent, unstable effect, etc., and achieves stability good, low solubility

Inactive Publication Date: 2009-06-17
SHANGHAI UNIV
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Problems solved by technology

The method of adding Fe(II) will increase the chroma of the effluent, and at the same time it is difficult to determine the dosage; UV photodegradation requires a large light source power and consumes a lot of energy; although photocatalysis can improve the degradation efficiency, it is economical. Poor performance and engineering operabilit

Method used

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  • Method for removing bromate ion in drinking water
  • Method for removing bromate ion in drinking water

Examples

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Embodiment 1

[0018] Weigh 168g of calcium oxide and 102g of alumina, press the mixed solid into a sheet or column, and sinter at 1500°C for 12 hours. The sintered product was ground and then put into a nearly saturated calcium chloride solution, stirred by magnetic force for 48 hours and then filtered. The solid material was dried at 105° C. and then ground. Take 20g of the prepared solid material and fill it into a cylindrical packed column, pass drinking water containing bromate 37.678μg / L from the bottom of the column, and pass through the packed column at a flow rate of 60 ~ 100ml / h and then from the packed column top out. The results showed that after 100L of bromate-containing drinking water was treated, the removal rate of bromate reached 91%-95%, and its concentration dropped below 10μg / L.

Embodiment 2

[0020] Weigh 84g of calcium oxide and 107g of iron hydroxide, press the mixed solid into a sheet or column, and sinter at 1500°C for 12 hours. The sintered product was ground and put into a nearly saturated calcium chloride solution, stirred by magnetic force for 48 hours and then filtered. The solid material was dried at 105° C. and then ground. Get the prepared solid material 10g and drop into 100L drinking water containing bromate 34.532μg / L. The mixture was stirred for 1 hour and then filtered. The results showed that after 100L of bromate-containing drinking water was treated, the removal rate of bromate reached 87%, and its concentration dropped below 10μg / L.

[0021] The solid material referred to in embodiment 1 is the inorganic layered compound Ca-Al-LDH (LDH represents containing OH - The interlayer compound, the original text of LDH is Layered Double Hydroxides).

[0022] The solid material indicated in embodiment 2 is the inorganic layered compound Ca-Fe-LDH (LD...

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Abstract

The invention relates to a method for removing bromate ions in drinking water and belongs to the technical filed of drinking water purifying treatment. The method removes the bromate ions in the drinking water by using an ion exchange principle of inorganic lamellar compounds. The key points of the method comprise: mixing a certain amount of a divalent metal oxide and a certain amount of a trivalent metal oxide according to a molar mass ratio of 3:1 or 3:2, pressing the mixed powder into sheets or columns and sintering the sheets or the columns at 1,300 to 1,600 DEG C for 8 to 12 hours; grinding a product of the sintering into fine grains and placing the fine grains into a saturated solution of a divalent metal chloride or a nitrate with magnetic stirring for 48 hours for complete reaction; and then carrying out filtration, drying and grinding to obtain a lamellar compound. The lamellar compound is filled in a filled column of the prior filtering device as a filtering and absorbing material. After the drinking water containing bromate ions is treated by the filled column, 87 to 97 percent of the bromate ions in the drinking water are removed.

Description

technical field [0001] The invention relates to a method for removing bromate ions in drinking water, which belongs to the technical field of drinking water purification treatment. Background technique [0002] Natural river water is generally used as the source of drinking water in my country. Natural fresh water generally contains bromide ions, which can be converted into bromate ions after treatment with ozone-biological activated carbon technology. Especially when seawater intrudes into natural river water, the concentration of bromide ions can increase significantly, leading to an increase in the concentration of bromate in the treated drinking water, which may affect the health of residents. The World Health Organization lists bromate as a substance that may pose a carcinogenic risk to humans. Both my country and the U.S. Environmental Protection Agency limit the content of bromate in drinking water to less than 10 μg / L. [0003] At present, the technologies for rem...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F1/42
Inventor 戴迎春顾蕾顾勤金海王静玲周吉寺钱光人
Owner SHANGHAI UNIV
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