Elemental boron reinforced Fenton system and method for removing 1,2-DCA in underground water

A 2-DCA, elemental boron technology, applied in polluted groundwater/leachate treatment, chemical instruments and methods, special compound water treatment, etc. long and other problems, to achieve the effect of simple steps, significant processing effect, and low requirements for operating conditions

Active Publication Date: 2021-06-29
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the microbial method is easily disturbed by natural conditions, it is difficult to control artificially, and the degradation cycle is long, and the degradation efficiency is unstable

Method used

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  • Elemental boron reinforced Fenton system and method for removing 1,2-DCA in underground water
  • Elemental boron reinforced Fenton system and method for removing 1,2-DCA in underground water
  • Elemental boron reinforced Fenton system and method for removing 1,2-DCA in underground water

Examples

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Effect test

Embodiment 1

[0035] A Fenton system strengthened by elemental boron, comprising Fe(II), hydrogen peroxide and elemental boron, the addition ratio of Fe(II), hydrogen peroxide and elemental boron is 0.25mmol:0.50mmol:6.0mg.

[0036] A method for removing 1,2-DCA in groundwater based on the above-mentioned Fenton system strengthened by elemental boron, specifically: preparing 250mL of 1,2-dichloroethane (1,2-DCA) containing initial concentration of 20mg / L ) to simulate the groundwater polluted by 1,2-DCA, add 69.5mg FeSO 4 ·7H 2 O and 6.0mg amorphous boron powder (B) (particle diameter is 5 μ m), finally add 0.50mmol (this molar weight refers to the content of hydrogen peroxide in the hydrogen peroxide solution, the same below) hydrogen peroxide (H 2 o 2 ) solution. Stir well during the reaction process, control the rotation speed to 600r / min, the reaction temperature is 20°C, and the total reaction time is 60 minutes, and samples are taken and analyzed at 0, 5, 10, 15, 30, and 60 minutes...

Embodiment 2

[0041] This example discusses the removal effect of the Fenton system of the present invention on different concentrations of 1,2-DCA.

[0042] A Fenton system strengthened by elemental boron, comprising Fe(II), hydrogen peroxide and elemental boron, the addition ratio of Fe(II), hydrogen peroxide and elemental boron is 0.25mmol:0.50mmol:6.0mg, 0.625mmol: 1.25mmol: 6.0mg, 1.25mmol: 2.50mmol: 6.0mg.

[0043] A method for removing 1,2-DCA in groundwater based on the above-mentioned Fenton system strengthened by elemental boron, specifically: prepare three parts of 250mL respectively containing initial concentration of 20mg / L (1mg / L=0.01mM, the same below), The aqueous solution of 1,2-dichloroethane (1,2-DCA) of 50mg / L and 100mg / L simulates the groundwater polluted by 1,2-DCA (this embodiment is considered in order to keep the same oxidant / dichloro The molar ratio of valence iron / pollutant (i.e. 1,2-DCA), under different pollutant concentrations, adding different amounts of hydr...

Embodiment 3

[0045] This example discusses the removal effect of the Fenton system of the present invention on 1,2-DCA under the condition that the aqueous solution contains different concentrations of Tween-80.

[0046] A Fenton system strengthened by elemental boron, comprising Fe(II), hydrogen peroxide and elemental boron, the addition ratio of Fe(II), hydrogen peroxide and elemental boron is 0.30mmol:0.60mmol:6.0mg.

[0047] A method for removing 1,2-DCA in groundwater based on the above-mentioned Fenton system strengthened by elemental boron, specifically: preparing three 250mL Tween- 80 (TW-80) and an aqueous solution containing 1,2-dichloroethane (1,2-DCA) at an initial concentration of 20mg / L to simulate groundwater polluted by 1,2-DCA, and then add 83.4mg FeSO 4 ·7H 2 O and 6.0 mg of amorphous boron powder (B) (particle size is 5 μm), and finally add 0.60 mmol of hydrogen peroxide (H 2 o 2 ) solution. Stir well during the reaction process, control the rotation speed to 600r / m...

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Abstract

The invention relates to an elemental boron reinforced Fenton system and a method for removing 1,2-DCA in underground water. The elemental boron reinforced Fenton system comprises Fe(II), hydrogen peroxide and elemental boron, and the addition amount ratio of the Fe(II) to the hydrogen peroxide to the elemental boron is (0.25 to 1.25) mmol to (0.50 to 2.50) mmol to (6.0 to 10.0) mg. The method specifically comprises the following steps: sequentially adding Fe(II), elemental boron and hydrogen peroxide into underground water containing 1,2-DCA to degrade 1,2-DCA, and obtaining treated underground water after the reaction is finished. Compared with the prior art, the method has the advantages that the 1,2-DCA (1,2-DCA) polluted underground water containing or not containing a surfactant can be efficiently and permanently treated, and the removal rate is 80% or above.

Description

technical field [0001] The invention belongs to the technical field of groundwater treatment, and in particular relates to a Fenton system strengthened by elemental boron and a method for removing 1,2-DCA in groundwater. Background technique [0002] Groundwater occupies a pivotal position in my country's water resources. Although the amount of water is small, it is widely distributed, with strong natural buffer capacity and stable water quality, which provides an important guarantee for my country's economic and social development. However, with the acceleration of my country's industrialization process and excessive unreasonable exploitation, the pollution of groundwater has become increasingly serious and needs to be solved urgently. [0003] With the promulgation of my country's first law specifically regulating the prevention and control of soil pollution, the "Soil Pollution Prevention and Control Law" and the implementation of a series of laws and regulations such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/28C02F101/36C02F103/06
CPCC02F1/722C02F1/283C02F2305/026C02F2101/36C02F2103/06
Inventor 吕树光周铮原黄靖瑶张祥付融冰曾贵禄杨儒民刘玉龙
Owner EAST CHINA UNIV OF SCI & TECH
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