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Method for degrading atrazine in water body through activating peroxymonosulfate by using potassium ferrate

A technology of atrazine and monosulfate, applied in chemical instruments and methods, water treatment of special compounds, oxidized water/sewage treatment, etc., can solve the problems of low activation efficiency and secondary pollution of peroxosulfate, and achieve Large application potential, low human and biological hazards, and simple operation

Inactive Publication Date: 2018-06-22
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for potassium ferrate to activate persulfate to degrade atrazine in water, the main technical problems to be solved are: the activation efficiency of persulfate is low, and water-soluble metal ions are easy to use as catalysts. cause secondary pollution

Method used

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  • Method for degrading atrazine in water body through activating peroxymonosulfate by using potassium ferrate
  • Method for degrading atrazine in water body through activating peroxymonosulfate by using potassium ferrate
  • Method for degrading atrazine in water body through activating peroxymonosulfate by using potassium ferrate

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Embodiment 1

[0034] Add 5.0 mM potassium persulfate to 10 mg / L atrazine wastewater to obtain a wastewater solution, and adjust the pH value of the wastewater to 6.0 with 2 mM sulfuric acid and sodium hydroxide. Then add 2.5mM potassium ferrate to the above solution, and react at room temperature for 60 minutes, see figure 1 . The degradation efficiency of atrazine reached 81.5%.

Embodiment 2

[0036] Add 5.0 mM potassium persulfate to 10 mg / L atrazine wastewater to obtain a wastewater solution, and adjust the pH of the wastewater to 3.0, 5.0, 7.0, and 9.0 with 2 mM sulfuric acid and sodium hydroxide, respectively. Then add 2.5mM potassium ferrate to the above solution, react at room temperature for 60 minutes, the results are shown in figure 2 . Their degradation efficiencies reached 64.3%, 73.8%, 80.7%, and 78.7%, respectively, at pH 3.0, 5.0, 7.0, and 9.0.

Embodiment 3

[0038] Add 1.2mM, 2.5mM, 4.0mM, 5.0mM, 7.5mM potassium persulfate to 10mg / L atrazine wastewater respectively to obtain a wastewater solution, and adjust the pH value of the wastewater to 6.0 with 2mM sodium hydroxide. Then add 2.5mM potassium ferrate to the above solution and react at room temperature for 60 minutes. The degradation efficiency of atrazine can be seen in image 3 . Their degradation efficiencies were 51.8%, 55.8%, 63.0%, 74.8%, 80.7%, respectively.

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Abstract

The invention discloses a method for degrading atrazine in a water body through activating peroxymonosulfate by using potassium ferrate. The invention relates to the water treatment method and solvesthe problem of low activation efficiency of single peroxymonosulfate. The method comprises the following steps that a ferrate and a peroxymonosulfate are added in a polluted water body, sulfate free radicals and hydroxyl free radicals with a strong oxidizing property are generated with the utilization of mutual interaction of the ferrate and the peroxymonosulfate, and refractory organic pollutantsof organic wastewater are further oxidized, so that the purpose of degrading organic pollutants is achieved. The method provided by the invention has efficient and quick operation and simple operation at normal temperature; the leaching rate of iron ions in a using process is very low; secondary pollution is reduced; and the method is adapted to extensive pH conditions, and has a wide applicationprospect in the purification of organic polluted water bodies.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a method for degrading atrazine in water by activating peroxosulfate with ferrate. Background technique [0002] Atrazine is a herbicide widely used in agriculture to control broadleaf weeds. Due to improper use, atrazine is often detected in surface water and groundwater, and it is higher than the drinking water standard (0.1 μg / L) stipulated by the European Union. Atrazine is a weakly basic compound with a stable structure and is difficult to degrade. Long-term exposure to atrazine-contaminated environments will inevitably have adverse effects on biological reproduction and human health. Even at low concentrations, atrazine can cause carcinogenic and endocrine disrupting effects in humans. Traditional treatment technologies such as adsorption, coagulation, and biological methods have been proposed in large numbers, but the removal efficiency is not...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/38C02F101/36
CPCC02F1/725C02F2101/36C02F2101/306C02F2101/38C02F2305/02C02F2305/023
Inventor 吴少华杨春平吴彬李惠茹林燕曾光明余佳平康丽
Owner HUNAN UNIV
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