▎ 摘　　要

NOVELTY - Method for preparing nano-selenium carbon-based mercury-derived adsorption material, involves (A) selecting and screening carbon-based adsorption materials, (b) dissolving selenium in water and adding sodium dodecyl sulfonate to make selenium-containing solutions, where the concentration of selenium in the selenium-containing solution is 5-600g/l, (c) adding the carbon-based adsorption material to the medium-containing solution, and adsorbing the selenium in the selenium-containing solution, (d) separating the impregnated mixture liquid obtained in step (c) to obtain a carbon-based adsorption material loaded with selenium, (e) drying the carbon-based adsorption material that loaded the selenium, and (f) placing the carbon-based adsorption material that is dry after drying the selenium in the reactor, passing the gas containing sulfur dioxide, and generating the original position of nano-selenium to obtain the original-level nano-selenium carbon-based mercury-proof absorbing material. USE - The method is used for preparing nano-selenium carbon-based mercury-derived adsorption material in natural gas plant, non-ferrous metal smelting plant, coal-fired power plant or mercury recovery industry (all claimed). ADVANTAGE - The nano-selenium carbon-based mercury-derived adsorption material has strong selenium crystal adhesion, difficulty falling off, excellent decentralization, and long life span. DETAILED DESCRIPTION - Method for preparing nano-selenium carbon-based mercury-derived adsorption material, involves (A) selecting and screening carbon-based adsorption materials, (b) dissolving selenium in water and adding sodium dodecyl sulfonate to make selenium-containing solutions, where the concentration of selenium in the selenium-containing solution is 5-600g/l, (c) adding the carbon-based adsorption material to the medium-containing solution, and adsorbing the selenium in the selenium-containing solution, (d) separating the impregnated mixture liquid obtained in step (c) to obtain a carbon-based adsorption material loaded with selenium, (e) drying the carbon-based adsorption material that loaded the selenium at 80-150℃ for 1-24 hours, and (f) placing the carbon-based adsorption material that is dry after drying the selenium in the reactor, passing the gas containing sulfur dioxide, and generating the original position of nano-selenium to obtain the original-level nano-selenium carbon-based mercury-proof absorption material, where the mass concentration of sulfur dioxide gas is greater than 1 parts per million (ppm), the flow of sulfur dioxide gas is 1-1 million m3/hour, and the passing time for sulfur dioxide gas is 5-18 hours. An INDEPENDENT CLAIM is included for a nano-selenium carbon-based mercury-proof absorption material prepared by the above method comprising the carbon-based adsorption material attached to the outer surface of the carbon-based adsorption material, where the nano-selenium in the inner surface has big or small holes, and the nano-selenium is obtained by reducing selenium compound by sulfur dioxide gas.