Organic arsenic wastewater treatment and arsenic stabilization method

Abstract

The invention discloses an organic arsenic wastewater treatment and arsenic stabilization method, which specifically comprises the following steps: in a neutral aerobic environment, adding zero-valentiron and a complex, and stirring to form active oxygen species, and thoroughly oxidizing organic arsenic in a water body into inorganic arsenic by using the active oxygen species; after the oxidationstage is finished, stopping aeration, adding an aluminum salt, and stirring continuously to form various hydroxyl complexes and hydroxides so as to achieve the effective separation of inorganic arsenic; and controlling the ratio of the complex to the zero-valent iron to the aluminum salt in the system so as to achieve the stabilization of the arsenic-containing sludge. According to the method, the thorough purification of organic arsenic wastewater can be realized, the formed arsenic-containing sludge is small in amount, the leaching amount of arsenic in the sludge is small, and the bioavailability is weak. The method can be used for treating livestock and poultry breeding wastewater, industrial wastewater, surface water and underground water containing organic arsenic.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and disposal, in particular to an organic arsenic wastewater treatment and arsenic stabilization method. Background technique [0002] Aromatic organic arsenic such as p-aminophenylarsine acid and 3-nitro-4-hydroxyphenylarsine acid has broad-spectrum sterilization, promotes the growth of livestock and poultry, and improves egg production rate, so it is widely used in my country's livestock and poultry breeding industry . This kind of aromatic organic arsenic is difficult to metabolize and decompose in animals, and most of it is excreted in the feces as the drug prototype. Due to the high water solubility of this kind of organic arsenic, it is easy to migrate and diffuse into surface water, soil and groundwater, and through biological and abiotic mechanisms, it is transformed into inorganic arsenic with stronger migration ability and higher toxicity. As the largest producer of livesto...

AI Technical Summary

Problems solved by technology

Although the cost of adsorption technology is relatively low, it only transfers pollutants

In addition, the arsenic-containing regeneration solution formed by traditional adsorption methods is also an unsolved problem

Images