Reagent formula for degrading organic pollutants through activated molecular oxygen based on reinforcement of ferrous iron deposits in aquifer and use method thereof

Abstract

The invention discloses a reagent formula for degrading organic pollutants through activated molecular oxygen based on reinforcement of ferrous iron deposits in an aquifer and a use method thereof. The reagent formula consists of an inorganic ligand and an organic ligand, wherein the organic ligand at least comprises two carboxyl groups and is high in the capacity of complexing with ferrous iron and ferric iron, and the adsorbability of complexes formed by the organic ligand and ferrous and ferric iron on sediments is poor; and the inorganic ligand is a phosphorus ligand which is high in the capacity of complexing with ferrous iron and ferric iron, and complexes formed by the inorganic ligand and ferrous and ferric iron are high in adsorbability on sediments. According to the invention, the organic ligand and the inorganic ligand are used for synergistically regulating and controlling the form of ferrous iron in a solid phase and a liquid phase in the aquifer and the electron transferbetween the solid phase and the liquid phase, so the yield and output of hydroxyl radicals are maximized, the total dosage of the ligands is reduced, and the degradation efficiency of organic pollutants is improved; and the reagent formula has the advantages of low cost, environmental friendliness and the like, and produces great economic and social benefits in the field of remediation of contaminated sites and underground water.

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...

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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

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