The Screening And Preparation Of The Compound Materials On The Removal Of Cu²⁺ And Zn²⁺ Acid Mine Drainage

At present there exist many problems for a variety of methods to solve the problem of acid mine drainage. In this experiment, red mud, slag, bentonite, fly ash are experimental materials. In order to remove Cu2+, Zn2+ and acidity of the simulative acidic wastewater by static experiments, this experiment studies the selection and production of best composite particle material which use to remove Cu2+, Zn2+ and acidity of acid mine drainage. The above are to seek the well remove effect, low cost, high efficiency, economy, environmental protection, new composite adsorbent material. The red mud, slag, fly ash in the experiment are industrial waste, and making the full use of them to produce the composite particles can achieve the purpose of waste to treat waste.Through the loss rate measurement, release determination of alkalinity, comparison of Cu2+ and Zn2+ total removal amount and adsorption amount, SEM analysis, economic cost analysis and so on, this article comparatively analyzes five kinds of granular materials of granular red mud, red mud: bentonite(8:2), steel slag:red mud(4:6), bentonite:steel slag(5:5), bentonite: steel slag(8:2) and screen red mud:bentonite(8:2) for optimal composite particles. As investment quantity is 1g/L, the total removal rate of Cu2+ and Zn2+ in simulated wastewater by red mud:bentonite(8:2) respectively: 52.68mg/g,53.25mg/g.By the composite particles total removal capacity measurement, alkalinity equilibrium adsorption capacity determination, alone with alkali removal amount determination, observation of SEM surface morphology and so on, experimental study finds the best composite particles adsorption agent of containing Cu2+ and Zn2+ removal mechanism is mainly the synergy of adsorption, chemical precipitation and flocculation sedimentation.