A method for efficiently removing quinclorac pollutants in water bodies

A quinclorac and pollutant technology, which is applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as secondary environmental pollution, surface water pollution, etc. stable effect

Active Publication Date: 2021-05-28
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Widespread use of quinclorac in crop production also leads to contamination of surface water
However, although the biochar adsorption method can adsorb the pollutants in the water body on the biochar carrier, it does not fundamentally change the toxicity of the pollutants. Once these adsorbed biochars are not disposed of properly, it is easy to cause secondary pollution to the environment. Therefore, it is urgent It is necessary to develop an adsorption material that can absorb and remove organic pollutants while degrading them

Method used

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  • A method for efficiently removing quinclorac pollutants in water bodies
  • A method for efficiently removing quinclorac pollutants in water bodies
  • A method for efficiently removing quinclorac pollutants in water bodies

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Add the water containing quinclorac with an initial concentration of 50mg / L into the centrifuge tube, adjust the pH value of the water sample to 2 with 0.1mol / L sodium hydroxide or hydrochloric acid, and then add TiO 2 / SiO 2 -Banana peel biochar composite adsorption material, the amount of adsorbent added per liter of water is 10g, under constant temperature conditions (usually in the range of 25-45°C), put it in a shaker for 24h, and use high performance liquid chromatography The instrument analyzes the concentration of quinclorac in the water sample after treatment, and the adsorption removal rate reaches more than 96%.

[0034] In this example, TiO 2 / SiO 2 -The banana peel biochar composite adsorbent is prepared by the following method:

[0035] (1) Preparation of modified banana peel powder: the banana peel obtained after removing the flesh of the banana is washed with distilled water, transferred to an oven, dried at 100°C, pulverized with a universal pulveriz...

Embodiment 2

[0044] Add the water containing quinclorac with an initial concentration of 50mg / L into the centrifuge tube, adjust the pH value of the water sample to 2 with 0.1mol / L sodium hydroxide or hydrochloric acid, and then add TiO 2 / SiO 2 -Banana peel biochar composite adsorbent, the amount of adsorbent added per liter of water is 10g, under constant temperature conditions (usually in the range of 25-45°C), put it in a shaker for 24 hours, and put it in the shaker after the shaker reaction is completed Under the irradiation of 500w xenon lamp (simulating visible light), the photocatalytic reaction is carried out to complete the degradation and removal of quinclorac in the water body. The concentration of quinclorac in the treated water sample was analyzed by high performance liquid chromatography, and the degradation reached 100%.

[0045] In the water body treatment process of this embodiment, turn on the 500w xenon lamp (simulating visible light), keep the vertical distance betwe...

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Abstract

The invention discloses a method for efficiently removing quinclorac pollutants in water bodies, which comprises TiO 2 / SiO 2 ‑Banana peel biochar composite adsorption material is added to the untreated water containing quinclorac for oscillating adsorption. After the adsorption equilibrium is reached, the untreated water is irradiated with visible light for photocatalytic reaction. Treat the degradation of quinclorac in the water body to complete the removal of quinclorac. The method of the present invention has large adsorption capacity, high removal rate, simple treatment process and easy operation, and the synergistic effect of adsorption and photocatalytic degradation has remarkable and stable effect, environmental protection and no secondary pollution. Turning waste into treasure and realizing the resource utilization of banana peels is a method for repairing quinclorac-polluted water bodies.

Description

technical field [0001] The invention relates to organic pollutant wastewater treatment, in particular to a method for efficiently removing quinclorac pollutants in water bodies. Background technique [0002] my country is a big country in the production and use of herbicides. Some of the herbicides applied to the soil can be degraded under physical, chemical, and biological effects, and some of them will be further migrated through diffusion, leaching, evaporation, absorption and enrichment by animals and plants, etc., resulting in Pollution to water bodies, air and other ecological environments and crops. In recent years, the pollution of surface water and groundwater by herbicides has aroused widespread concern. Quiclorac is a quinoline carboxylic acid hormone-type selective herbicide, which is mainly used to control monocotyledonous weeds in rice fields, especially barnyardgrass, and is one of the main herbicide varieties in rice fields in my country. Due to the stable n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/30B01J20/20B01J20/30B01J21/18C02F101/36
CPCB01J20/06B01J20/103B01J20/20B01J21/18B01J35/004B01J2220/42B01J2220/4806B01J2220/4825B01J2220/4875C02F1/281C02F1/283C02F1/30C02F2101/36C02F2305/10
Inventor 杨丽华曾新颜龚道新罗海峰蒋方舟雷爽肖灿玲
Owner HUNAN AGRICULTURAL UNIV
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