Abstract

Blast furnace slag is produced in large quantities as a by-product in the steel manufacturing process. In this study, a method for synthesizing lead ion adsorbent with high adsorption ability was investigated by alkali activation of the blast furnace slag. A sodium hydroxide aqueous solution was used as an alkali activator, and silica was added to the aqueous solution to improve the adsorption capacity. Alkali activation of the blast furnace slag with the sodium hydroxide aqueous solution yielded lead ion adsorbent. Addition of silica to the sodium hydroxide aqueous solution further increased the lead ion adsorption capacity. Langmuir adsorption isotherms revealed that the highest maximum adsorption capacity of 1658.1 mg-Pb/g was obtained when 5 g of silica was added to 50 mL of the sodium hydroxide aqueous solution. The adsorption capacity for lead ion decreased when more than 10 g of silica was added to the sodium hydroxide aqueous solution.

中文翻译：

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添加二氧化硅对碱活化高炉矿渣铅离子吸附能力的影响

摘要

高炉矿渣是钢铁生产过程中的副产品，大量产生。本研究采用高炉矿渣碱活化的方法，研究了一种高吸附能力铅离子吸附剂的合成方法。使用氢氧化钠水溶液作为碱活化剂，并在水溶液中添加二氧化硅以提高吸附能力。用氢氧化钠水溶液对高炉矿渣进行碱活化，得到铅离子吸附剂。氢氧化钠水溶液中添加二氧化硅进一步提高了铅离子的吸附能力。Langmuir 吸附等温线表明，当将 5 g 二氧化硅添加到 50 mL 氢氧化钠水溶液中时，获得最高的最大吸附容量，为 1658.1 mg-Pb/g。当氢氧化钠水溶液中添加超过10g二氧化硅时，对铅离子的吸附能力下降。