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Method for efficiently removing acrylamide in water

A technology for removing acrylamide and water, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. It can solve the problems of small molecular weight, inability to effectively remove acrylamide, acrylamide residues, etc., and achieve high salinity , reduce the risk of cancer, the effect of simple operation

Inactive Publication Date: 2017-12-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commercial polyacrylamide is used in water treatment applications. At present, there are many commercial production processes, such as solution polymerization, suspension polymerization, radiation polymerization, etc. Regardless of the production method, the required monomer is acrylamide , in the synthesis process, the reaction is difficult to complete, and acrylamide will inevitably remain. According to the report of the World Health Organization (WHO), the main source of acrylamide in drinking water is the use of polyacrylamide flocculant, and because acrylamide has a small molecular weight, Due to the strong polarity, acrylamide in drinking water cannot be effectively removed by conventional physical treatment processes (coagulation, precipitation and filtration) and combined UV / chlorine process

Method used

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  • Method for efficiently removing acrylamide in water

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Effect test

Embodiment 1

[0029] Add a phosphate solution with a concentration of 10mmol / L as a buffer solution to 50ml of water to be treated, and then add sodium hypochlorite until the concentration reaches 7×10 -5 mol / L, then use a UV lamp (245μW / cm 2 ) irradiation, the reaction was carried out for 50 minutes, and at the same time, the acrylamide in the water was fully reacted under the UV / chlorine combined process. After the reaction, the residual amount of acrylamide in the water body was shown in Table 1.

Embodiment 2

[0031] Add a phosphate solution with a concentration of 10mmol / L as a buffer solution to 50ml of water to be treated, and then add sodium hypochlorite until the concentration reaches 3.5×10 -5 mol / L, with H 2 SO 4 Adjust the pH value of the water to be treated to 5, and then use an ultraviolet lamp (245μW / cm 2 ) irradiation, the reaction was carried out for 13 minutes, and at the same time, the acrylamide in the water was fully reacted under the UV / chlorine combined process, and the residual amount of acrylamide in the water body was shown in Table 1 after the reaction.

Embodiment 3

[0033] Add a phosphate solution with a concentration of 10mmol / L as a buffer solution to 50ml of water to be treated, and then add sodium hypochlorite until the concentration reaches 10.5×10 -5 mol / L, adjust the pH value of the water to be treated to 9 with NaOH, and then use a UV lamp (245μW / cm 2 ) irradiation, the reaction was carried out for 50 minutes, and at the same time, the acrylamide in the water was fully reacted under the UV / chlorine combined process. After the reaction, the residual amount of acrylamide in the water body was shown in Table 1.

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Abstract

The invention discloses a method for efficiently removing acrylamide in water, and belongs to the field of water treatment application. The method comprises the following steps of adding hypochlorite into a water body to be treated containing the acrylamide; meanwhile, the water body is subjected to ultraviolet ray irradiation; meanwhile, the pH value of the water body to be treated containing the acrylamide is controlled to be 3 to 8; after the reaction, the water body subjected to acrylamide removal is obtained. The method provided by the invention is combined with the ultraviolet / chlorine combination process; the pH value of the reaction water body is regulated; the content of the acrylamide in the water body can be fast reduced; the degradation is thorough; the mineralization degree is high; the carcinogenic risk of the acrylamide monomers in the drinking water can be effectively reduced. In addition, the method has the advantages that the operation is simple; the reaction conditions can be easily controlled; the engineering application can be easily realized.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a method for efficiently removing acrylamide in water. Background technique [0002] Acrylamide was first prepared in 1950 by the hydration of acrylonitrile. Acrylamide in drinking water mainly comes from the use of polyacrylamide in the water treatment process. Polyacrylamide is a high molecular polymer, which is generally divided into four types: anionic, cationic, nonionic and amphoteric. It is often used as a coagulant in the coagulation stage of water treatment processes. The use of polyacrylamide can accelerate the sedimentation of particles, reduce costs, improve effluent water quality, reduce sludge volume, and improve sludge quality. Due to its various advantages, the application of polyacrylamide in drinking water treatment has been gradually promoted. Commercial polyacrylamide is used in water treatment applications. At present, there are many commercial production proce...

Claims

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Application Information

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IPC IPC(8): C02F1/76C02F1/72C02F1/32C02F101/38
CPCC02F1/32C02F1/725C02F1/76C02F2101/38
Inventor 高泽晨徐斌张天阳王安琪邹相昀夏圣骥
Owner TONGJI UNIV
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