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Method for recycling harmful aromatic hydrocarbon waste in water body

A technology of reuse and water body, applied in water pollutants, chemical instruments and methods, organic chemistry, etc., can solve problems such as harmful aromatic hydrocarbon pollution

Pending Publication Date: 2022-03-01
TIANJIN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the treatment of wastewater, the pollution problem of harmful aromatic hydrocarbons is solved, and the full utilization of resources is realized.

Method used

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  • Method for recycling harmful aromatic hydrocarbon waste in water body
  • Method for recycling harmful aromatic hydrocarbon waste in water body
  • Method for recycling harmful aromatic hydrocarbon waste in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In 100mL of an aqueous solution with a toluene content of about 86mg / L (equivalent to a theoretical COD of about 270mg / L), add 20mg of ferric chloride, and use sodium hydroxide to adjust the initial pH to 8-8.5 (there may be some errors in the measurement of the pH value ), in the actual experiment process, the pH will change with the photochemical reaction, so the pH value is written as the initial value here. Then the solution is sealed and placed in a light intensity of about 10–30mW / cm 2 In the actual experiment process, the light intensity also changes at any time. Unlike the conventional artificial light source experiment in the laboratory, the present invention uses natural light, and the light intensity of natural light itself changes from morning to afternoon. , and the invention point of the present invention is also to be closer to the natural water body environment and illumination situation, so the present invention can directly utilize sunlight when applyi...

Embodiment 2

[0043] In 100mL of an aqueous solution with an o-xylene content of about 50mg / L (converted to a theoretical COD of about 158mg / L), add 25mg of manganese oxyhydroxide and 25mg of ferric hydroxide, and adjust the initial pH to 8.5-9 (pH There may be some errors in the measurement of the value), in the actual experiment process, the pH value will change with the photochemical reaction, so the pH value is written as the initial value here. Then seal the solution and place it under a light intensity of about 20–50mW / cm 2 In the actual experiment process, the light intensity also changes at any time. Unlike the conventional artificial light source experiment in the laboratory, the present invention uses natural light, and the light intensity of natural light itself changes from morning to afternoon. , and the invention point of the present invention is that it is closer to the natural water body environment and light conditions, so the present invention can directly use sunlight whe...

Embodiment 3

[0045] In 100mL of an aqueous solution with a m-xylene content of about 50mg / L (converted to a theoretical COD of about 158mg / L), add 50mg of copper hydroxide, and use sodium hydroxide to adjust the initial pH to 8.5-9 (the measurement of the pH value may exist A certain error), in the actual experiment process, the pH will change with the photochemical reaction, so the pH value is written as the initial value here. Then seal the solution and place it under a light intensity of about 20–50mW / cm 2 In the actual experiment process, the light intensity also changes at any time. Unlike the conventional artificial light source experiment in the laboratory, the present invention uses natural light, and the light intensity of natural light itself changes from morning to afternoon. , and the invention point of the present invention is that it is closer to the natural water body environment and light conditions, so the present invention can directly use sunlight when it is applied late...

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Abstract

The invention discloses a method for recycling harmful aromatic waste in a water body, the harmful aromatic waste in the water body contains substituted benzene aromatic compounds, and the method for recycling the waste comprises the following steps: converting the substituted benzene aromatic compounds into citric acid; the specific method comprises the following steps: adding a compound containing transition metal into the water body containing the substituted benzene aromatic compound, controlling the pH value of the water body, and then carrying out anoxic photodegradation operation under the irradiation of natural light or simulated sunlight, so that the substituted benzene aromatic compound in the water body is converted into citric acid. On the basis of the water body self-purification effect, the self-purification process of the water body is simulated and the oxidation depth of the water body is controlled under the conditions close to the natural water body environment (pH value), natural illumination conditions (illumination intensity and illumination time) and natural water body dissolved oxygen content (without stirring and oxygen blowing processes), so that substituted benzene-containing aromatic compounds in the water body are just oxidized into citric acid; the aim of utilizing harmful aromatic hydrocarbon wastes which are difficult to treat in the water body is fulfilled successfully.

Description

technical field [0001] The invention belongs to the field of waste water treatment of environmental technology, and in particular relates to a method for reusing harmful aromatic waste in water bodies. Background technique [0002] Water resources are also an indispensable natural resource for human production and life, and one of the important elements of the ecological environment. [0003] Although the water body has the function of self-purification, when the pollutants in the water body exceed its self-purification capacity, serious water pollution will occur. This harmful effect will also pose a serious threat to human health and become a "bottleneck" restricting economic and social sustainable development. [0004] Aromatic compounds are a class of chemical products that are widely used and used in large quantities. In the process of use and disposal, it can enter the environment through various channels and cause pollution to water bodies, soil and the atmosphere. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/31C07C59/265C02F1/58C02F1/30C02F101/32
CPCC07C51/313C02F1/58C02F1/30C02F2209/22C02F2101/32C02F2209/06C02F2305/10C07C59/265Y02W10/37
Inventor 孙波刘荣欣张洪江王英军张会军吴新世张春雪
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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