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Filter medium for removing chloroacetic acid from water and preparation method thereof

A filter medium, chloroacetic acid technology, applied in the field of water treatment, can solve problems such as difficult operation, cumbersome process, enhanced mutagenic activity of drinking water, etc.

Inactive Publication Date: 2014-05-07
QIDI ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation method uses potassium permanganate, ozone, chlorine dioxide, etc. to oxidize drinking water, but this method will increase the mutagenic activity of drinking water; , difficult to operate and other disadvantages

Method used

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  • Filter medium for removing chloroacetic acid from water and preparation method thereof
  • Filter medium for removing chloroacetic acid from water and preparation method thereof

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preparation example Construction

[0021] The invention discloses a preparation method of a filter medium for removing chloroacetic acid in water, comprising the following steps:

[0022] The mixture is molded in a molding machine, then sintered at 150-250° C. for 30-100 minutes, cooled and demolded to obtain a filter medium. The mixture includes 200-400 parts by weight of ultra-high molecular weight polyethylene, 150-300 Active carbon in parts by weight, pore forming agent in 80-150 parts by weight and modified natural calcium carbonate in parts by weight in 100-150 parts, and the weight average molecular weight of the ultra-high molecular weight polyethylene is 5 million to 7 million.

[0023] In the present invention, the density of the ultra-high molecular weight polyethylene (UHMW-PE) is preferably 0.936-0.964 g / cm 3 The heat distortion temperature is preferably 85°C; the melting point is preferably 130-136°C, more preferably 132-135°C, and the ultra-high molecular weight polyethylene (UHMW-PE) has good we...

Embodiment 1

[0039] At 55°C, react limestone with carbon dioxide and oxalic acid to obtain modified limestone with a specific surface area of ​​50m 2 / g;

[0040] Weigh 350g of ultra-high molecular weight polyethylene (UHMW-PE) with a molecular weight of 7 million and a particle size of 100 mesh, 150g of medical wood activated carbon with a particle size of 100 mesh, 100g of food-grade ammonium bicarbonate and 100g of modified limestone particles into the mixer After stirring in medium for 120 minutes, the removed part was put into a tubular mold, pressed, sintered at 200° C. for 50 minutes, and demoulded after cooling to obtain a filter element.

Embodiment 2

[0042] At 55°C, react limestone with carbon dioxide and oxalic acid to obtain modified limestone with a specific surface area of ​​50m 2 / g;

[0043] Weigh 300g of ultra-high molecular weight polyethylene (UHMW-PE) with a molecular weight of 6 million and a particle size of 80 mesh, 220g of medical wood activated carbon with a particle size of 120 mesh, 130g of food-grade ammonium bicarbonate and 140g of modified limestone particles and put them into the mixer After stirring in medium for 120 minutes, the removed part was put into a tubular mold, pressed, sintered at 230° C. for 60 minutes, and demoulded after cooling to obtain a filter element.

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Abstract

The invention discloses a method for preparing a filter medium for removing chloroacetic acid from water. The method comprises the following steps: placing a mixture into a die pressing device; performing die pressing; sintering at the temperature of 150 to 250 DEG C for 30 to 100 minutes; and cooling and demoulding to obtain the filter medium, wherein the mixture comprises 200 to 400 parts by weight of ultra-high molecular weight polyethylene, 150 to 300 parts by weight of active carbon, 80 to 150 parts by weight of pore-forming agent and 100 to 150 parts by weight of modified natural calcium carbonate. The ultra-high molecular weight polyethylene, the active carbon, the pore-forming agent and the modified natural calcium carbonate have a strong adsorption effect on the chloroacetic acid, so a filter core prepared from the filter medium can effectively remove dichloroacetic acid and trichloroacetic acid from water to be treated. The test result shows that the filter core has high removal rate on the dichloroacetic acid and the trichloroacetic acid and is applicable to treatment on home terminal application water.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a filter medium for removing chloroacetic acid in water and a preparation method thereof. Background technique [0002] Chlorination disinfection technology is a water treatment and disinfection technology that has been used in my country for many years. However, the latest research results show that while chlorination disinfection, chlorine reacts with certain inorganic and organic components in water to generate a series of halogenated organic by-products. Among them, volatile trihalomethanes and less volatile haloacetic acids are considered to be the main disinfection by-products. [0003] Both trihalomethanes and haloacetic acids are potential carcinogens, and their carcinogenic risk has been continuously proved by biology and pathology. Zhang Xiaojian of Tsinghua University and others pointed out that the carcinogenic risk of haloacetic acid in drinking water account...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14
Inventor 周奇迪栾云堂
Owner QIDI ELECTRIC GROUP