Abstract A sponge-type composite adsorbent xanthate-modified chitosan @ titanate nanotubes (XCTS@TNTs) was prepared via a simple and low-cost procedure, and its adsorption capacity was evaluated in batch and continuous plate column systems. The three-dimensional network macroporous structure made it easy to separate from the solution and suitable for the column-based treatment. The excellent adsorption capacity of Pb(II) was as high as 342.47 mg/g and could be obtained in wide ranges of pH and temperature. Interestingly, XCTS@TNTs exhibited outstanding selectivity for Pb(II) rather than other divalent heavy metal ions. Adsorption mechanism was elucidated by the FTIR and XPS analyses. The column adsorption results indicated that the treatment effect was proportional to bed height and inversely to flow rate and influent concentration. XCTS@TNTs was remarkably effective in the removal of Pb(II) from actual industrial effluents to meet the discharge requirements and contributed to the recovery of Pb(II). The treatment volumes of simulated actual battery wastewater and smelting effluent by 2.40 g XCTS@TNTs were as high as 6360 and 49584 mL for Pb(II) with the concentration of 30.55 and 4.49 mg/L, respectively. This work developed a highly practical process for removing heavy metal ions from practical wastewaters.

中文翻译：

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海绵型复合吸附剂吸附工业废水中Pb(II)的板柱优化与应用

摘要 通过简单、低成本的方法制备了海绵型复合吸附剂黄原酸酯改性壳聚糖@钛酸酯纳米管（XCTS@TNTs），并在间歇和连续板柱系统中对其吸附能力进行了评估。三维网络大孔结构使其易于从溶液中分离，适用于柱基处理。Pb(II) 的优异吸附容量高达 342.47 mg/g，并且可以在很宽的 pH 值和温度范围内获得。有趣的是，XCTS@TNTs 对 Pb(II) 而不是其他二价重金属离子表现出出色的选择性。通过FTIR和XPS分析阐明了吸附机制。柱吸附结果表明处理效果与床层高度成正比，与流速和进水浓度成反比。XCTS@TNTs 在去除实际工业废水中的 Pb(II) 以满足排放要求方面非常有效，并有助于 Pb(II) 的回收。2.40 g XCTS@TNTs对模拟实际电池废水和冶炼废水的处理量分别高达6360和49584 mL，浓度分别为30.55和4.49 mg/L的Pb(II)。这项工作开发了一种非常实用的方法，用于从实际废水中去除重金属离子。