Mesoporous zinc silicate composites derived from iron ore tailings and their efficient adsorption for methylene blue
The functional utilization of iron ore tailings(IOT)converted into high value-added products is re-ceiving increasing attention and expectation.Herein,mesoporous zinc silicate composites,including zincsilite composite and hemimorphite composite with flower-like morphology assembled by layered nanosheets,as well as willemite composite with ellipsoidal morphology assembled by short rods,were synthesized from iron ore tailings by introducing zinc ions via hydrothermal reaction process.Mesoporous zinc silicate composite hemimor-phite has a typical narrow pore structure formed by the aggregation of sheet-like particles,with a pore width of about 3.385 nm and a specific surface area of 96.15 m2/g.The composite shows efficient adsorption capacity for the dye methylene blue(MB),with a removal rate of nearly 100％within 10 min,and has potential application prospects in the field of dye waste water treatment.
iron ore tailingsmesoporous zinc silicate compositehydrothermal reactionmethylene blueadsorp-tion
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