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首页> 外文期刊>Journal of nano research >Synthesis of Calcium-Deficient Carbonated Hydroxyapatite as Promising Sorbent for Removal of Lead Ions
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Synthesis of Calcium-Deficient Carbonated Hydroxyapatite as Promising Sorbent for Removal of Lead Ions

机译：钙缺乏的碳酸羟基磷灰石的合成作为有望去除铅离子的吸附剂

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摘要

This study is devoted to the synthesis of calcium-deficient carbonated hydroxyapatite and the modeling study of its sorption capacity for heavy metal ions on the example of Pb2+. Sorption of Pb2+ ions was investigated in physiological conditions. It was found that the synthesized calciumdeficient carbonated hydroxyapatite is nano-sized and has an excellent sorption capacity for Pb2+ ions-up to 588 mg/g. Characterization of the solid particles after sorption by XRD and FTIR methods showed that in the sorption process, a new crystal phase of hydroxypyromorphite was formed. Also, the sharp decrease of pH in the initial period when the material is exposed to the heavy metal solution was explained. This effect is attributed to the fast formation of the surface complex =POPb+, followed by the dissociation of structural water molecules in the surface layer of the material under the influence of the adsorbed lead ions.
机译：这项研究致力于以钙缺乏的碳酸羟基磷灰石的合成及其对重金属离子的吸附能力为模型研究，以Pb2 +为例。在生理条件下研究了Pb2 +离子的吸附。发现合成的钙缺乏的碳酸羟基磷灰石是纳米尺寸的，并且对于高达588mg / g的Pb 2+离子具有优异的吸附能力。用XRD和FTIR方法对固体颗粒进行吸附后的表征表明，在吸附过程中，形成了羟基焦晶石的新晶相。此外，还解释了当材料暴露于重金属溶液时，pH值在初始阶段会急剧下降。该效应归因于表面络合物= POPb +的快速形成，随后在吸附的铅离子的影响下材料表面层中的结构水分子解离。

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