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首页> 外文期刊>Journal of Environmental Engineering >Removal of lead and chromium by activated slag - A blast-furnace waste
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Removal of lead and chromium by activated slag - A blast-furnace waste

机译：活性炉渣去除铅和铬-高炉废料

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The blast-furnace waste generated in steel plants has been converted into a low-cost adsorbent. The resulting activated slag has been characterized and used for the removal of lead and chromium. The effect of pH, sorbent dosage, adsorbate concentrations, presence of other metal ions, temperature, and contact time on the sorption of lead and chromium were studied in batch experiments. Kinetic studies were undertaken to have an idea of the mechanistic aspects of the process. The uptake of lead is found to be greater than that of chromium. Adsorption on activated slag follows both Freundlich and Langmuir models. In addition, a series of fixed-bed experiments were performed in an attempt to simulate industrial conditions. The bed-depth-service-time (BDST) model proposed by Hutchins was successfully applied to the sorptive removal of lead. Some experiments were also performed with a view to recover Pb2+ and chemically regenerate the spent slag columns in situ.
机译：钢铁厂产生的高炉废料已被转化为低成本的吸附剂。已经表征了所得的活性炉渣，并将其用于去除铅和铬。在批处理实验中研究了pH，吸附剂剂量，吸附物浓度，其他金属离子的存在，温度和接触时间对铅和铬吸附的影响。进行了动力学研究，以了解该过程的机械方面。发现铅的吸收量大于铬的吸收量。活性炉渣上的吸附均遵循Freundlich和Langmuir模型。此外，进行了一系列固定床实验，以模拟工业条件。 Hutchins提出的床深服务时间（BDST）模型已成功地应用于吸附性铅的去除。还进行了一些实验，以回收Pb2 +并就地对废渣柱进行化学再生。

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