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- W2071719258 abstract "Abstract Using activated carbon (AC) and samples obtained by heat and sulfurizing treatments of the material, the adsorption of Pb2+ from aqueous solution was studied at two pH values and at three temperatures in the range 25–45°C. Adsorbents were prepared either by heat treatment of AC from 30 to 900°C in N2 or H2S, or by treatment of the material first at 30°C successively in SO2 and H2S and then at 200°C in N2. Their characterization was in terms of textural properties and surface chemistry. Techniques used were gas adsorption (N2, −196°C), mercury porosimetry, density measurements (He, 30°C) and FT-IR spectroscopy. The treatments effected on AC originated a great increase in the adsorption of Pb2+, but only when it occurred from solutions of metallic ion at unchanged pH and at 25°C. Adsorption decreased strongly by pH and temperature variations, except for AC. The adsorption rate depended on the adsorbent, pH and temperature." @default.
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- W2071719258 date "1993-01-01" @default.
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- W2071719258 title "Adsorption of Pb2+ by heat-treated and sulfurized activated carbon" @default.
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- W2071719258 doi "https://doi.org/10.1016/0008-6223(93)90083-m" @default.
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