A preparation method of titanium-doped birnessite for efficient treatment of antimony wastewater

Abstract

The invention discloses a preparation method of titanium-doped birnessite capable of being used to efficiently treat antimony wastewater, and belongs to the technical direction of water treatment adsorption in the field of environmental protection. The method comprises the following specific steps: 1) placing a potassium permanganate solution into a conical flask, and carrying out stirring and heating to boiling by using an oil bath on a constant-temperature magnetic heating stirrer; 2) dropwise adding a mixed solution of hydrochloric acid and a certain amount of titanium sulfate by using a constant-flow pump; 3) continuing reacting for 30min after the dropwise addition is finished; 4) aging the product at 60-80 DEG C; and 5) washing and drying the aged mineral. The material prepared by the method has a high isoelectric point and a large specific surface area, and shows excellent performance of oxidizing and adsorbing Sb (V) and Sb (III), wherein the maximum adsorption amounts can reach 560 mg / g and 473 mg / g respectively. The method disclosed by the invention is simple and reliable, has low cost, and can be used for treating high-concentration mine wastewater or events that a waterbody is suddenly polluted by heavy metals.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the application of using titanium-doped birnessite as an adsorbent to remove antimony in waste water. Background technique [0002] The large amount of antimony-containing wastewater discharged from antimony industrial mining, mineral processing, smelting and other processes is the main source of antimony pollutants, which will also cause pollution of water sources and soil. Antimony is extremely harmful to the human body, and the toxicity of trivalent antimony is 10 times that of pentavalent antimony (Shtangeeva, I., Bali, R., Harris, A., 2011. Bioavailability and toxicity of antimony. J. Geochem. Explor. 110,40-45.). In most cases, the concentration of antimony is less than 1 μg / L, but due to human activities, antimony has an extremely high concentration of 100-7000 mg / L in some water bodies (Guo, X., Wu, Z., He, M. , 2009. Removal of antimony (V) and antimony (III) f...

AI Technical Summary

Problems solved by technology

In the process of dealing with antimony, manganese oxide has good oxidizing properties and can effectively oxidize trivalent antimony into pentavalent antimony with less toxicity and mobility, but the adsorption capacity of manganese oxide is low

However, although the iron-manganese oxides that are currently used more widely have a higher adsorption capacity for antimony than manganese oxide, the adsorption capacities for Sb(III) and Sb(V) in water are 213mg / g and 124mg / g respectively (Xu Wei. Iron Research on arsenic desorption and antimony adsorption behavior on the surface of manganese composite oxides [D]. Beijing: Eco-Environmental Research Center of Chinese Academy of Sciences, 2011.), but there is still a large amount of sludge of iron and manganese oxides after treatment, the adsorption efficiency is low, and the adsorption capacity is still low. Issues that need to be further improved

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