Department of Chemical Engineering, Faculty of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan.
Environ Technol. 2022 Jun;43(14):2124-2134. doi: 10.1080/09593330.2020.1866088. Epub 2021 Jan 6.
Adsorptive separation of Pb(II) from aqueous solution containing Pb(II) and other heavy metals (Cu(II), Zn(II) and Cd(II)) has been investigated, using three adsorbents, such as an iminodiacetic acid-chelating resin (CR11) and Fe-based adsorbents (goethite and magnetite). Batchwise adsorption of Pb(II) and other metal ions in single metal system and multi-components system was carried out with varying parameters, such as pH, time and initial concentrations of metals. CR11 possesses the highest adsorption ability for these metals, while the selectivity of individual metal is little. Goethite possesses selectivity for Pb(II) and Cu(II), and magnetite possesses selectivity for Pb(II), though the adsorption capacity for the metals is less than those with CR11. The kinetics of the adsorption of metals with all adsorbents is of pseudo-second-order, and the magnetite is revealed to have the fastest adsorption kinetics. The three adsorbents can be applied for chromatographic separation for these metals. The magnetite is feasible for selective separation of Pb(II), although complete elution cannot be achieved.
采用三种吸附剂，即亚氨基二乙酸螯合树脂（CR11）和基于铁的吸附剂（针铁矿和磁铁矿），研究了从含有 Pb(II) 和其他重金属（Cu(II)、Zn(II) 和 Cd(II)）的水溶液中吸附分离 Pb(II)。在单金属体系和多组分体系中，通过改变 pH 值、时间和金属初始浓度等参数，进行了 Pb(II) 和其他金属离子的分批吸附。CR11 对这些金属具有最高的吸附能力，而对单个金属的选择性则较小。针铁矿对 Pb(II) 和 Cu(II) 具有选择性，磁铁矿对 Pb(II) 具有选择性，尽管其对这些金属的吸附能力小于 CR11。所有吸附剂对金属的吸附动力学均为准二级动力学，磁铁矿的吸附动力学最快。这三种吸附剂可用于这些金属的色谱分离。磁铁矿可用于选择性分离 Pb(II)，尽管不能实现完全洗脱。
