Removal method for organic pollutants based on microporous mineral absorption and coupling as well as microwave degradation

一种有机污染物、微孔矿物的技术，应用在水污染物、吸附水/污水处理、化学仪器和方法等方向，能够解决孔道结构破坏、比表面积降低、微波穿透性差等问题，达到孔道结构规整、吸附容量大、吸附效率高的效果

Inactive Publication Date: 2012-07-11
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, microwave energy has great damage to activated carbon and is only suitable for short-term treatment. Longer-term microwave radiation will cause the surface of activated carbon to catch fire, and the pore structure will be destroyed after regeneration, and the specific surface area will be greatly reduced.
In addition, due to the strong ability of activated carbon to absorb microwaves and the shallow penetration of microwave energy, it cannot evenly heat the adsorption column. It often happens that the activated carbon in some spaces cannot be regenerated or incompletely regenerated due to not being irradiated by microwaves. The structure of some activated carbon is severely damaged due to excessive temperature rise
Due to the absorption of microwave energy by activated carbon, the penetration of microwave in the activated carbon layer is poor, which greatly limits the size of the adsorption column.

Method used

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  • Removal method for organic pollutants based on microporous mineral absorption and coupling as well as microwave degradation
  • Removal method for organic pollutants based on microporous mineral absorption and coupling as well as microwave degradation

Examples

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Embodiment 1

[0039] Atrazine is currently one of the most widely used and most important herbicides in the world. It has a stable structure, strong water solubility, is difficult to degrade, and is very slowly mineralized by microorganisms. It poses a serious threat to the water ecological environment and human drinking water. threaten. In this example, 10 ppm of atrazine aqueous solution is used as the target treatment substance, and dealuminated HY zeolite is used as the adsorbent. Since the molecular diameter of atrazine is 0.54 nm, HY zeolite has a three-dimensional pore structure, large specific surface area, and hydrophobic Strong, regular pore structure, pore size of 0.74-1.2nm, so atrazine molecules can be selectively adsorbed into the pores and bound, which is conducive to microwave-induced degradation. The atrazine aqueous solution is delivered to the first adsorption column 7 at a certain flow rate through the water pump 1, the filter device 2, the main control valve 3 and the m...

Embodiment 2

[0041] The specific embodiment of the present invention is illustrated with the removal of typical chlorophenol compound 2,4-dichlorophenol in water body. Chlorophenol compound is widely used in pesticide, pharmaceutical industry and industry, and is important in water and soil environment. pollutants. Due to the stable structure of chlorophenols, traditional physical, biochemical or chemical oxidation methods generally have a long cycle and low degradation efficiency. Therefore, effective treatment of phenol-containing wastewater has become a topic of general concern in environmental protection, printing and dyeing, papermaking and other industries. In this example, 20 ppm of 2,4-dichlorophenol aqueous solution is used as the target treatment, and dealuminated HY zeolite is used as the adsorbent. The molecular diameter of 2,4-dichlorophenol is equivalent to the pore size of the dealuminated HY zeolite, which can It is selectively adsorbed into the pores of zeolite and bound, ...

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Abstract

The invention discloses a removal method for organic pollutants based on microporous mineral absorption and coupling as well as microwave degradation, comprising the following main steps of: filling a hydrophobic microporous mineral adsorbent in absorption columns to adsorb organic pollutants in organic wastewater; and starting a microwave generator to degrade the organic pollutants adsorbed in the absorption columns under a microwave induction after the adsorbent is saturated. Continuous treatment on the organic wastewater is realized via the alternate operation and regeneration of the two absorption columns. The removal method for organic pollutants based on microporous mineral absorption and coupling as well as microwave degradation disclosed by the invention realizes efficient removal and degradation for the organic pollutants from a water body and cyclic utilization for a carrier via hydrophobic microporous mineral absorption and coupling as well as microwave induced degradation technology, and thoroughly mineralizes the pollutants into non-toxic and harmless micro-molecular substances, so that the removal method can be used for pollution abatement for underground water, surface water and drinking water. The removal method disclosed by the invention is suitable for treatment on various water-soluble polar organic pollutants.

Description

technical field [0001] The invention relates to a method for removing organic pollutants, in particular to a method for removing organic pollutants based on microporous mineral adsorption coupled with microwave degradation. Background technique [0002] With the rapid development of social economy and the continuous improvement of people's living standards, the pollution of toxic substances, especially refractory organic substances, to the natural environment has intensified. Wastewater from printing and dyeing, pharmaceutical, chemical and other industries, landfill leachate, and urban domestic sludge may all be Contains a large amount of refractory organic matter. This type of pollutant is not easy to degrade in the environment and has a long retention time. It can affect the regional and global environment through the transport of air and water, and can be enriched through the food chain, eventually seriously affecting human health. Water pollution is one of the most seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/48C02F101/30
CPCC02F1/302C02F1/28C02F1/48C02F2101/345C02F2101/306C02F2101/30C02F2303/16C02F2101/36C02F1/281
Inventor 程和发胡二丹
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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