SỰ HẤP PHỤ Pb2+ VÀ Cu2+ TRONG NƯỚC CỦA VẬT LIỆU SILICA ĐƯỢC TỔNG HỢP TỪ TRO ĐỐT LÒ GẠCH

Tóm tắt

In this work, the silica materials are synthesized from the ash of brickyard. The precursorconcentration, solid-liquid ratio, calcination temperature … are investigated to find the best optimalpreparation conditions. The generated silica materials have silic dioxide SiO2 with 10 –15 nm ofparticle size, which was proved by the results of FT-IR, SEM image and XRD pattern. Moreover, theseSiO2 materials had the high adsorption capacity of Cu2+ and Pb2+ ions in the aqueous solutions. Thefirst-order adsorption kinetic and second – order adsorption kinetic showed a relatively good fit asapplying to the experimental data for the Cu2+ and Pb2+ adsorption processes.Key words: lead, copper, silica material, brickyard