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Reagent formula and its application method based on the activation of molecular oxygen to degrade organic pollutants by ferrous iron deposits in enhanced aquifers

A technology for activating organic pollutants and molecular oxygen. It is applied in water pollutants, chemical instruments and methods, and oxidized water/sewage treatment. It can solve problems such as low efficiency, unsatisfactory pollutant degradation effect, and weak molecular oxygen oxidation ability. , to achieve the effect of low operating cost, low cost and low concentration of chemicals

Active Publication Date: 2021-04-30
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

At present, the in-situ chemical oxidation repair method based on molecular oxygen has not been paid attention to, mainly because the oxidation ability of molecular oxygen is weak, and the efficiency of reducing substances such as ferrous iron in aqueous medium to activate molecular oxygen to generate hydroxyl radicals is low, causing pollution. Biodegradation effect is not ideal

Method used

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  • Reagent formula and its application method based on the activation of molecular oxygen to degrade organic pollutants by ferrous iron deposits in enhanced aquifers
  • Reagent formula and its application method based on the activation of molecular oxygen to degrade organic pollutants by ferrous iron deposits in enhanced aquifers
  • Reagent formula and its application method based on the activation of molecular oxygen to degrade organic pollutants by ferrous iron deposits in enhanced aquifers

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Embodiment

[0042] Trichlorethylene is a widespread chlorinated organic pollutant in groundwater. Due to its high toxicity, there is great harm to human and biological health and safety, so it is necessary to find a medicament and method for efficiently treating trichlorethylene wastewater. In order to investigate the inorganic ligands in the agent and the degradation effect of organic pollutants by the activation of molecular oxygen by the activation of ferrous iron deposits by inorganic ligands, a case test was carried out with trichlorethylene as the target pollutant.

[0043] The clay-type actual sediments directly collected in the field containing iron (5.2% iron content) but low organic matter content (1.5%) were anaerobically dried in a glove box, crushed to an average particle size of less than 0.25 cm, and collected to obtain ferrous iron Sediment spare.

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Abstract

The invention discloses a medicament formula for degrading organic pollutants based on the activation of molecular oxygen by strengthening ferrous deposits in an aquifer and a method for using the same. The pharmaceutical formula is composed of inorganic ligands and organic ligands; the organic ligands contain at least two carboxyl groups, and the organic ligands have strong complexing ability with ferrous iron and ferric iron. The complexes formed have poor adsorption on sediments; the inorganic ligands are phosphorus-based ligands, and the complexing ability of inorganic ligands with ferrous and ferric iron is strong. The compound has strong adsorption on the sediment. The invention utilizes organic ligands and inorganic ligands to coordinately regulate the form of ferrous iron in the solid-liquid two phases in the aqueous layer, and the electron transfer between the solid-liquid two phases, so as to maximize the yield and output of hydroxyl radicals, and reduce the complexation rate. It has the advantages of low cost and environmental friendliness, and has great economic and social benefits in the field of polluted sites and groundwater remediation.

Description

technical field [0001] The invention relates to the technical field of treatment of organic pollutants in groundwater, in particular to a medicament formula based on strengthening divalent iron deposits in an aquifer to activate molecular oxygen to degrade organic pollutants and a use method thereof. Background technique [0002] Groundwater is one of the most important freshwater resources on Earth. However, with the rapid economic development, a large number of groundwater resources are polluted. The monitoring results of 195 cities in the country show that 97% of the urban groundwater is polluted to varying degrees, and 40% of the urban groundwater pollution is increasing year by year. [0003] Among all kinds of pollution, organic pollution of groundwater directly affects human health, so the development of remediation technology for organic pollution of groundwater is of great significance. Groundwater pollution and organic pollution remediation technologies mainly inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F101/30C02F103/06
CPCC02F1/725C02F1/727C02F2101/30C02F2103/06C02F2305/023
Inventor 袁松虎谢雯静
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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