Method for removing antimony in wastewater

Abstract

The invention provides a method for removing antimony in wastewater, and belongs to the field of water treatment. According to the method for removing antimony from waste water, an initially generatedsecondary iron oxide is used as an adsorbent to remove antimony. The initially generated secondary iron oxide is an iron oxide generated from acid waste water of coal mine, is shaped like yellow-brown grains, and has a pore structure inside, and main composition elements of the initially generated secondary iron oxide are Fe, S, O and H. The initially generated secondary iron oxide is an iron sulfate secondary mineral with not toxicity or harm, so that secondary pollution caused by an adsorbent is avoided. The adsorption quantity of the initially generated secondary iron oxide on Sb (III) canbe up to 219.78 mg / g, and the adsorption quantity of the initially generated secondary iron oxide on Sb (V) can be up to 366.30 mg / g, so that antimony ions in the wastewater can be effectively removed. In addition, the method is low in cost, waste is changed into treasure, and the method accords with the environment protection strategy of treating waste by waste, and has important social and economic significance.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a method for removing antimony in waste water, in particular to a method for removing antimony in waste water by using nascent secondary iron oxides. Background technique [0002] Antimony (Sb) is a potentially toxic and carcinogenic non-essential element for the human body, and has become an "emerging" long-distance transport global environmental pollutant. Antimony and its compounds are widely used, mainly in the production of ceramics, glass, electrical appliances, paints, pyrotechnic materials and flame retardants. my country is the country with the richest antimony ore resources in the world, and its annual output accounts for 80% of the global market. However, antimony has active geochemical properties in the supergene environment and is easy to migrate and diffuse in the water environment. Activities such as mining and dressing of antimony-containing mineral resource...

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Problems solved by technology

At present, the commonly used iron oxides are goethite, tetragonal iron ore, iron iron ore, ferrihydrite, hematite modified magnetic nanoparticles, ferrate, and composite oxides of iron and other heavy metals such as manganese, although Studies have confirmed that these iron oxide materials have a good adsorption effect on antimony, and their antimony removal ability is stronger than that of commercial ferric oxide and hematite, but their antimony removal ability still cannot meet the demand. In addition, iron and other heavy metals are used. When using composite oxides, there is the problem of secondary pollution caused by heavy metals. For example, when using iron-manganese composite oxides, due to Mn 4+ redox effect, the presence of Mn 2+ release risk, while Mn 2+ It is one of the water quality safety monitoring indicators

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