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UV oxidation method for synchronously removing pollutants and disinfection byproducts

A technology for disinfection by-products and pollutants, which is applied in the field of water treatment, can solve the problems of large amount of use, high energy consumption, and few examples of removing trace pollutants, and achieve the effect of improving control effect and oxidation efficiency

Inactive Publication Date: 2020-06-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, UV advanced oxidation technology has the following problems: 1) UV and UV / H 2 o 2 The amount of preoxidant used is large and the energy consumption is high; 2) UV and UV / H 2 o 2 The effect of pre-oxidation on the control of carbon-containing disinfection by-products such as trihalomethanes and haloacetic acids needs to be improved; 3) UV / H 2 o 2 / Micro-aeration and UV / micro-aeration technologies are mainly used for the removal of endocrine disruptors, and there are few examples for the removal of trace pollutants such as antibiotics, pesticides, and daily chemicals; 4) UV / H 2 o 2 In the embodiment of micro-aeration to remove endocrine disruptors, the treated water sample is a pollutant solution prepared in the laboratory, which is different from the actual application; 5) UV / H 2 o 2 / Micro-aeration and UV / micro-aeration technology have no application examples in the removal of disinfection by-product precursors

Method used

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  • UV oxidation method for synchronously removing pollutants and disinfection byproducts
  • UV oxidation method for synchronously removing pollutants and disinfection byproducts
  • UV oxidation method for synchronously removing pollutants and disinfection byproducts

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1, the device diagram is as follows Figure 1-2 As shown, the water sample to be treated is placed in the water tank, the UV lamp tube 1 is placed in the water sample to be treated, the UV lamp tube 1 is covered with a quartz glass sleeve, the aeration tube is also placed in the water sample to be treated, and the aeration An aeration head 10 is provided at the end of the tube. Outside the water tank, there is a cooling water circulation tank, and the cooling water circulation tank is filled with cooling water, which is used to control the reaction temperature of the water sample to be treated and prevent the abnormal temperature rise of the water sample after long-term irradiation of the UV lamp; the cooling water circulation tank is equipped with There are cooling water inlet 7 and cooling water outlet 8. The connection of the water sample to be treated is also provided with a water sample circulation system, including a water sample circulation pipe, and ...

Embodiment 2

[0051] Embodiment two, such as figure 1 , image 3 , the water sample to be treated is placed in the water tank, the UV lamp tube 1 is placed in the water sample to be treated, the UV lamp tube 1 is overcoated with a quartz glass sleeve, and the aeration tube is also placed in the water sample to be treated. An aeration head 10 is provided at the end. Outside the water tank, there is a cooling water circulation tank, and the cooling water circulation tank is filled with cooling water, which is used to control the reaction temperature of the water sample to be treated and prevent the abnormal temperature rise of the water sample after long-term irradiation of the UV lamp; the cooling water circulation tank is equipped with There are cooling water inlet 7 and cooling water outlet 8. The connection of the water sample to be treated is also provided with a water sample circulation system, including a water sample circulation pipe, and the two ends of the water sample circulation...

Embodiment 3

[0058] Embodiment three, a kind of photoreactor, such as Figure 4 As shown, it includes a quartz glass sleeve (with a UV lamp 1 inside), an air pump, a sampling tube 6, an aeration tube and an aeration head 10, a water pump 2, and an air filter.

[0059] The water tank is a 65L tubular stainless steel reactor, and the reactor operates intermittently with complete mixing. The UV lamp adopts a UV lamp with a power of 75W, the wavelength is 254nm, and the UV intensity is controlled to 153 (μW·cm -2 ).

[0060] In this example, air is used as the aeration gas source, and the gas flow rate is 4.8L min -1 , the control group had no aeration, and the water temperature was controlled at room temperature (23±1°C).

[0061] The target pollutant in this example is carbamazepine (a common antiepileptic drug), and the initial concentration is 0.02mM. In this example, H 2 o 2 The dosage of oxidant is 2mM.

[0062] The specific steps for removing carbamazepine by using composite UV a...

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Abstract

The invention discloses a UV oxidation method for synchronously removing pollutants and disinfection byproducts. The method comprises the following steps: adjusting the pH value of a to-be-treated water sample to 4-8 by adopting one or more of concentrated sulfuric acid, sodium hydroxide and a phosphate buffer solution; introducing air and / or oxygen into the to-be-treated water sample at the flowrate of 2-60L / min, and fully mixing the water sample, the gas and the oxidant in the reaction container; wherein UV irradiation is carried out on the water sample to be treated, the wavelength of UV ranges from 160 nm to 290 nm, preferably, the wavelength ranges from 185 nm to 254 nm, the irradiation dosage ranges from 15 mJ / cm < 2 > to 600 mJ / cm < 2 >, and the time is 5 min or longer, preferably,5 min to 120 min; and adding a chlorine-containing disinfectant into the to-be-treated water sample, wherein the concentration of chlorine in the chlorine-containing disinfectant is 5-30mg / L. The method provided by the invention not only has a better removal effect and a higher reaction rate on trace pollutants and disinfection by-product precursors, but also has a control effect on carbon-containing disinfection by-products which are difficult to control by a traditional UV / H2O2 oxidation technology.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a UV oxidation method for simultaneously removing pollutants and disinfection by-products. Background technique [0002] In recent years, with the development of industry and the acceleration of urbanization, trace pollutants in environmental water bodies and drinking water are increasing day by day. Trace pollutants consist of a range of man-made or natural substances, including pharmaceuticals and personal care products, steroids, chemical products, pesticides and herbicides, etc. Trace pollutants in environmental water bodies and drinking water can cause a series of negative effects on ecosystems and human health, including acute or chronic toxicity, endocrine disruption, and increased microbial resistance genes. Even at low concentrations, some trace pollutants can seriously endanger human health. Therefore, trace pollutants in drinking water and the environment are...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/76C02F1/72C02F1/78C02F101/36C02F101/34
CPCC02F1/32C02F1/722C02F1/76C02F1/78C02F2101/34C02F2101/36C02F2303/04
Inventor 楚文海刘晓宇陈莉栾鑫淼高乃云
Owner TONGJI UNIV
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