This chapter discusses the adsorption of lead and zinc ions onto a natural zeolite (clinoptilolite) and zeolite bearing tuff (stilbite) from aqueous solution, whereby the main parameters were the effects of initial pH of solution, mass of adsorbent, and initial metal concentration in solution.ududThe physical and chemical properties of the natural materials used are characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and AES–ICP.ududDetermination of the maximum capacity of adsorbents for lead and zinc removal under the studied conditions is the main objective of the equilibrium studies. Experimental data are fitted to the Freundlich and Langmuir adsorption models.ududThe adsorption of lead and zinc ions from diluted solution onto natural zeolite and zeolite bearing tuff occurs efficiently. Determination of the impact of the studied parameters on the efficiency of removal of lead and zinc ions from the solution showed that in the studied range, in the case of lead ions, there were not any significant changes found, but in the case of zinc ions, removal was most effective at lower concentration of zinc ions, higher mass of adsorbents, and higher pH value of the solution.
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机译:本章讨论了水溶液中铅和锌离子在天然沸石(斜发沸石)和含沸石凝灰岩(闪锌矿)上的吸附,主要参数是溶液的初始pH,吸附剂质量和初始金属浓度的影响。 ud ud所用天然材料的物理和化学性质通过X射线衍射,扫描电子显微镜,能量色散光谱和AES–ICP来表征。 ud ud测定吸附剂对铅和铅的最大容量在研究条件下脱锌是平衡研究的主要目标。实验数据适合Freundlich和Langmuir吸附模型。 ud ud有效地吸附了稀溶液中铅和锌离子到天然沸石和含沸石凝灰岩上的吸附。确定所研究参数对溶液中铅和锌离子去除效率的影响表明,在研究范围内,对于铅离子,没有发现任何重大变化,但对于锌离子在较低的锌离子浓度,较高的吸附剂质量和较高的溶液pH值下,去除最为有效。
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