Method for plating iron and in situ removing arsenic for regional aquifer

Abstract

The invention provides a method for plating iron and removing arsenic for a regional aquifer. The method comprises the following steps: selecting a target regional aquifer, determining the depth, osmotic coefficient, underwater flow velocity and dispersion coefficient of the target aquifer, arranging a central pumping well at the center of the target region, defining the 5m regions around the central pumping well as a working regions, arranging four injection wells at the boundaries of the working regions, arranging a water pump in the central pumping well to pump water, respectively injecting a ferrous reagent into the target aquifer in the four injection wells by adopting an injection pump, injecting a sodium hydrochloride reagent into the target aquifer in the four injection wells by adopting the injection pump, and then injecting water to completely push the sodium hydrochloride reagent into the target aquifer. According to the method for plating iron and removing arsenic for the regional aquifer, the deficiencies in the background technology can be solved, and the method for removing arsenic can fulfill the purposes of obviously improving the arsenic removal effect and lowering the arsenic removal cost.

Description

technical field [0001] The invention provides a method for removing arsenic from groundwater, and specifically relates to an in-situ arsenic removal process for establishing an in-situ improvement and repair technology system for high-arsenic groundwater by utilizing the iron plating technology on the medium surface of regional aquifers, which belongs to drinking water treatment and purification technology field. Background technique [0002] Arsenic is a notorious carcinogen and mutagen that can cause acute or chronic serious health hazards. According to surveys, high-arsenic groundwater (>10μg / L) is widely distributed in more than 70 countries and regions in the world, directly threatening the drinking water safety of about 150 million people, and has caused tens of millions of people to suffer from drinking-water arsenic poisoning and even skin cancer , Respiratory tract cancer, visceral cancer and other fatal diseases are considered to be the most serious mass poison...

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