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Device and method to degrade polycyclic aromatic hydrocarbon pollutants

A technology for polycyclic aromatic hydrocarbons and pollutants, which is applied in the field of devices and methods for degrading polycyclic aromatic hydrocarbon pollutants, can solve problems such as the threat of drinking water sources, PAHs are difficult to degrade, and the impact of environmental factors is large, and achieve important social and ecological benefits, The source of raw materials is wide and low, and the effect is suitable for popularization

Pending Publication Date: 2018-08-17
FISHERIES RES INST OF FUJIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using microbial methods to treat pollutants, the degradation process is complicated and the environmental factors are greatly affected. Not only special strains need to be cultivated, but also a variety of strains need to be synergistic. The degradation cycle is long and the degradation is incomplete. Sensitive, easy to cause inactivation of degraded tissues, and may even lead to the death of microorganisms, and it is difficult to degrade high molecular weight PAHs
And it has been reported that after the coking wastewater is treated with the existing BaP treatment process, its BaP content still cannot meet the requirements of the maximum allowable discharge concentration of iv class pollutants in the GB8978-1996 Integrated Wastewater Discharge Standard (0.000 03mg / L), thus causing serious damage to the water body. Serious pollution, especially poses a serious threat to drinking water sources (the concentration of BaP in drinking water standards is less than 10ng / L)

Method used

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  • Device and method to degrade polycyclic aromatic hydrocarbon pollutants
  • Device and method to degrade polycyclic aromatic hydrocarbon pollutants
  • Device and method to degrade polycyclic aromatic hydrocarbon pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Pretreatment of oyster shells

[0033] Oyster shells are mixed with a lot of silt and other sundries, they should be cleaned carefully to remove the soil and skin stains attached to the surface, and then dried or dried directly after cleaning. The process flow is as follows:

[0034] Oyster shell→picking→soaking→cleaning→pickling→rinsing→drying→coarse powder→sieving→calcining.

[0035] Soaking: Soak in tap water for 4 hours, stirring constantly for washing.

[0036] Pickling: Put the cleaned oyster shells in 0.5% hydrochloric acid, stir constantly for pickling, and take them out after 1 hour.

[0037] Rinse: Soak and rinse with distilled water to make it neutral.

[0038] Calcination: The sieved oyster shell powder is calcined at high temperature for 1 hour for use.

[0039] (2) Preparation of titanium oxide sol

[0040] Solution A: 20 mL of tetrabutyl titanate was added into 50 mL of absolute ethanol under vigorous stirring, and the stirring was continued for ...

Embodiment 2

[0048] see figure 1 The structure of the polycyclic aromatic hydrocarbon pollutant degradation device of the present invention is as follows: it includes a hollow quartz tube, the outer tube wall of the hollow quartz tube is hollowed out, and hollow holes 5 are provided. The left end of the hollow quartz tube is provided with an inlet 1, and the right end is provided with an outlet 2, and the hollow quartz tube is filled with oyster shell powder 4 loaded with titanium dioxide. An ultraviolet light source 3 is arranged between the hollow tubes.

[0049] see figure 2 , is a static device: this device is suitable for situations where there are few pollutants to be treated

[0050] A stainless steel container 6 is placed on the outside of the device, the middle and lower side of the container 6 is provided with a solution outlet 7, and a cylindrical hollow quartz device is arranged in the middle of the container 6. The outer layer of the quartz device is hollowed out, and hollo...

Embodiment 3

[0052] Dynamic device: This device is suitable for batch treatment of pollutants

[0053] see figure 1 The structure of the polycyclic aromatic hydrocarbon pollutant degradation device of the present invention is as follows: it includes a hollow quartz tube, the outer tube wall of the hollow quartz tube is hollowed out, and hollow holes 5 are provided. The left end of the hollow quartz tube is provided with an inlet 1, and the right end is provided with an outlet 2, and the hollow quartz tube is filled with oyster shell powder 4 loaded with titanium dioxide. An ultraviolet light source 3 is arranged between the hollow tubes.

[0054] see image 3 , the device includes a flat cylindrical stainless steel container 10, the upper side of the stainless steel container 10 is provided with a water inlet pipe 8 and a water outlet pipe 9 on the lower side, which is beneficial to the inflow and discharge of pollutants, and the stainless steel container 10 is provided with two vertical...

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Abstract

The invention relates to a device and method to degrade polycyclic aromatic hydrocarbon pollutants. The device with modified nano titanium oxide that carries waste shell powder is used to provide efficient and green degradation for polycyclic aromatic hydrocarbon pollutants in wastewater. The device and method have the advantages that waste oyster shells are turned into wealth, efficient photocatalytic degradation is provided for polycyclic aromatic hydrocarbons in wastewater, the environment is protected, and health is maintained for aquatics and human.

Description

technical field [0001] The invention relates to a device and method for degrading polycyclic aromatic hydrocarbon pollutants, which realizes efficient, rapid and mineralized degradation of polycyclic aromatic hydrocarbon pollutants in simulated sewage by using nano-titanium oxide materials modified by waste shell powder , the processing device has the advantages of economy, space saving and high efficiency, and is suitable for popularization, and the method has great significance in the fields of environmental protection and energy utilization. Background technique [0002] Polycyclic Aromatic Hydrocarbons (PAHs) are produced by the incomplete combustion of hydrocarbons due to high temperature and oxygen deficiency during the thermal decomposition process of organic matter (petroleum, coal, natural gas, straw, tobacco, etc.). In recent years, the concentration of PAHs in the water environment has been increasing, especially in my country, with the rapid industrial developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32B01J31/38B01J35/02C02F101/32
CPCC02F1/32C02F1/325B01J31/38C02F2101/327C02F2201/3227C02F2305/10B01J35/50B01J35/39
Inventor 王丽娟罗冬莲刘海新叶玫
Owner FISHERIES RES INST OF FUJIAN
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