ABSTRACT In this work, palygorskite was used to immobilize Pb using a sorption-calcination method. The speciation transformation of Pb during the process was characterized using surface complexation modeling (SCM), X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), 27Al and 29Si solid state nuclear magnetic resonance (NMR) spectroscopy and field emission scanning electron microscopy (FESEM). Results showed that Pb was adsorbed at permanently charged sites in the form of outer-sphere surface complexes at pH

中文翻译：

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坡缕石吸附-煅烧过程中铅的形态转变：对铅封存的影响

摘要在这项工作中，坡缕石用于使用吸附-煅烧方法固定 Pb。使用表面络合模型 (SCM)、X 射线光电子能谱 (XPS)、粉末 X 射线衍射 (XRD)、27Al 和 29Si 固态核磁共振 (NMR) 光谱和场表征了该过程中 Pb 的形态转变。发射扫描电子显微镜（FESEM）。结果表明，在 pH 条件下，Pb 以外球表面复合物的形式吸附在永久带电位点