Study On Adsorption Performance Of Mesoporous γ-Al₂O₃to SO₄^2- And F^-of Beneficiation Wastewater

Tailings dam is composed of tailings accumulation, It stocks mainly used in metal andnonmetal mines to choose the ore tailings or other industrial waste residue. Ore dressing wastewaterdischarge to the tailings dam,so the water level continued to rise, the dam seepage water bring aseries of environmental problems. Some ion content exceeds bid,such as SS、F^-、SO₄^2-、Cl-andNH4+-N. With many years of circulation and enrichment, increasingly serious pollution of theenvironment. To take effective approach to management has also caused wide public concern.This article chooses homemade mesoporous γ-Al₂O₃as adsorbent, adsorption material fortailings dam seepage of SO42-and F^-the dynamic adsorption of basic research. In smallexperimental stage, eperimental analysis from three aspects: mesoporous γ-Al₂O₃hape effect on theperformance of adsorption; Dynamic experiment of factors on the adsorption effect;pretreatment ofexperiment. The result show that: mesoporous γ-Al₂O₃have an effect on adsorptionperformance,partilcles and mesoporous γ-Al₂O₃consisted of SO₄^2-and F^-had better adsorptionperformance on SO₄^2-and F^-, the optimal operating conditions shall be: at the speed of0.06m/s;pH6and quality of mesoporous γ-Al₂O₃is250g. After pretreatment（sand filter, bentonite,electromagnetic flocculation and microcrystalline glass synergy） process adsorption effect increasedsignificantly.Through penetration experimentnal study, two forms of the same quality250g mesoporous γ-Al₂O₃can deal with wastewater38L and50L respectively.According to the test experiment of the parameters design and development the pilotexperiment system. Simulation of tailing dam seepage water treatment system for experiments.Wastewater through sand filter, bentonite and electromagnetic flocculation with microcrystallineglass synergy, wasteweater has carried out decoloring treatment,removal of suspended solids. Thenby parallel system which composes of zeolite and mesoporous γ-Al₂O₃, to adsorpt ammonianitrogen,SO₄^2-,F^-in water. Finally enter the chlorine ion permeation membrane system to reduce thecontent of Cl-. After processing system make the water up to standard-------The urban sewagerecycling industrial water water quality standards. Regeneration of saturated adsorption mesoporous γ-Al₂O₃, use distilled water and sodiumhydroxide solution as renewable liquid. The result show that saturated adsorption mesoporous γ-Al₂O₃can be regenerated by0.10mol/L sodium hydroxide solution in9minutes. In addition,saturated adsorption mesoporous γ-Al₂O₃used for the prepation of slag glass-ceramic, utilizationrate reached28%, the slag glass-ceramics system has superior comprehensive performance.