Carbonated nanohydroxyapatite from bone waste and its potential as a super adsorbent for removal of toxic ions
Carbonated nanohydroxyapatite from bone waste and its potential as a super adsorbent for removal of toxic ions
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DOI：
10.1016/j.jece.2021.105114
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发表时间：
2021-04
影响因子：
7.7
通讯作者：
Yurina Sekine;T. Nankawa;Teppei Yamada;D. Matsumura;Y. Nemoto;M. Takeguchi;T. Sugita;I. Shimoyama;N. Kozai;S. Morooka
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作者：
Yurina Sekine;T. Nankawa;Teppei Yamada;D. Matsumura;Y. Nemoto;M. Takeguchi;T. Sugita;I. Shimoyama;N. Kozai;S. Morooka
对有毒金属进行有效、低成本的净化对于应对全球健康风险、减少环境污染和建设可持续的未来至关重要。在这里，我们开发了一种生态友好的羟基磷灰石吸附剂制成的骨废物，可以有效地捕获90锶。将猪骨浸泡在碳酸氢钠水溶液中，得到表面带负电荷的高度碳酸化纳米羟基磷灰石（C-NHAP）晶体。傅里叶变换红外光谱表明，C-NHAP是高度碳酸化的，并且引入的碳酸根离子（CO 32-）的量随着浸渍溶液中NaHCO 3浓度的增加而增加。随着引入C-NHAP中的CO 32 −离子量的增加，它表现出更强的离子吸附性能。C-NHAP对Sr 2+的分配系数（Kd= 24，780 mL g−1）分别比斜发沸石和未处理骨的分配系数大约20倍和250倍。C-NHAP对Sr 2+也表现出高吸附容量（Qe= 125 mg g−1）。扩展的X射线吸收精细结构谱表明，C-NHAP中的CO 32 −位在其高吸附性能中起着重要作用。C-NHAP对Cd ~（2+）、Pb ~（2+）、Cu ~（2+）具有良好的吸附性能。以骨渣为原料制备的C-NHAP是一种环保、高性能、低成本的材料，在环境污染物去除和餐厨垃圾处理方面具有重要的应用前景。
The effective, low-cost decontamination of toxic metals is critical for addressing global health risks, reducing environmental pollution, and building a sustainable future. Here, we developed an eco-friendly hydroxyapatite nanocrystal adsorbent made from bone waste that can effectively capture90Sr. Highly carbonated nanohydroxyapatite (C-NHAP) crystals with a negatively charged surface were obtained by simply immersing pig bone in an aqueous solution of sodium hydrogen carbonate (NaHCO3). Fourier transform infrared spectra showed that the C-NHAP was highly carbonated and that the amount of introduced carbonate ions (CO32−) increased with increasing NaHCO3concentration in the immersion solution. With increasing amount of CO32−ions introduced into the C-NHAP, it exhibited a greater ion-adsorption performance. The distribution coefficient (Kd= 24,780 mL g−1) of the C-NHAP for Sr2+was approximately 20 and 250 times greater than those of clinoptilolite and untreated bone, respectively. The C-NHAP also exhibited high adsorption capacity (Qe= 125 mg g−1) for Sr2+. The extended X-ray absorption fine structure spectra showed that the CO32−sites in C-NHAP played an important role in its high adsorption performance. The C-NHAP exhibited high adsorptivity for Cd2+, Pb2+, and Cu2+. The C-NHAP prepared from bone waste is an eco-friendly, high-performance, low-cost material that should be useful in environmental pollutant removal and food waste disposal.