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Method for synchronously removing chlorite and emerging organic micropollutants in water by ultraviolet light

A chlorite, ultraviolet light technology, applied in the field of water treatment

Pending Publication Date: 2020-05-01
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of ubiquitous chlorite and various toxic and harmful emerging organic micro-pollutants in drinking water in an efficient and quick manner, and provides a method for synergistic effect of ultraviolet light and harmful substance chlorite. Simultaneous removal of chlorite and emerging organic micropollutants from water

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  • Method for synchronously removing chlorite and emerging organic micropollutants in water by ultraviolet light
  • Method for synchronously removing chlorite and emerging organic micropollutants in water by ultraviolet light
  • Method for synchronously removing chlorite and emerging organic micropollutants in water by ultraviolet light

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Embodiment 1

[0025] This embodiment provides a method for synchronously removing chlorite and emerging organic micro-pollutants in water with ultraviolet light. The specific steps are as follows: prepare an aqueous solution containing micro-pollutants to be treated as a solution to be treated (pH=7.0), the volume is 100 mL, and the initial benzoic acid concentration is 1 μM, (wherein, M is mol / L, and μM is 10 -6 mol / L, mM is 10 -3 mol / L, the same below), the concentration of sodium chlorite is 10μM (this concentration does not exceed the limit of chlorite in the sanitary standard for drinking water (GB5749-2006)), and UV radiation is applied, and the chlorite absorbance Very high, complete degradation is achieved within 30s, and when the illumination time reaches 5min, the removal rate of carbamazepine can reach more than 80%, but neither UV nor sodium chlorite alone can remove carbamazepine.

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Abstract

The invention belongs to the field of water treatment, and discloses a method for synchronously removing chlorite and emerging organic micropollutants in water by ultraviolet light. The method can beused for removing various degradation-resistant organic micropollutants such as chlorite, medicines, personal care products, endocrine regulators, brominated flame retardants, pesticides, algal toxins, odor substances and the like which have risks on human health and ecological environment. Specifically, a main inorganic by-product chlorite generated after chlorine dioxide pre-oxidation of a watersupply plant or chlorine dioxide disinfection of factory water is utilized, and then a large number of hydroxyl radicals, chlorine radicals and chlorine oxygen radicals are generated through ultraviolet radiation to attack micro-pollutants, so that synchronous degradation of chlorite and micro-pollutants is realized. The method is simple to operate, obvious in effect and safe to use, chlorite andvarious emerging organic micropollutants in water can be synchronously removed, and mineralization to a certain extent is achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for synchronously removing chlorite and emerging organic micro-pollutants in water with ultraviolet light. Background technique [0002] In the production of drinking water, about 32.8% of the water plants in the country use chlorine dioxide for pre-oxidation or disinfection of factory water. Although chlorine dioxide disinfection produces fewer organic disinfection by-products than other disinfection methods, the use of chlorine dioxide disinfection will inevitably produce inorganic disinfection by-products, the main component of which is chlorite. Because chlorite can destroy red blood cells, cause methemoglobinemia and hemolytic anemia, and at the same time produce developmental toxicity, endocrine toxicity and neurotoxicity to animal growth, the Ministry of Health of China and the World Health Organization have put chlorite in drinking water. Salt has made a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/76C02F101/30
CPCC02F1/32C02F1/76C02F2101/30C02F2303/04
Inventor 周石庆王珏卜令君祝淑敏伍洋涛孙聚龙
Owner HUNAN UNIV
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