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 capture ⁹⁰Sr. 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 NaHCO₃ concentration 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 (K_d = 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 (Q_e = 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.

有效，低成本地净化有毒金属对于解决全球健康风险，减少环境污染以及建立可持续的未来至关重要。在这里，我们开发了从骨废物制成的生态友好的羟基磷灰石纳米晶体的吸附剂，可以有效地捕捉⁹⁰高级高碳酸纳米羟基磷灰石（C-纳米羟基磷灰石）晶体与带负电荷的表面被通过简单地浸渍猪骨在氢钠的水溶液中获得的碳酸盐（NaHCO ₃）。傅立叶变换红外光谱表明，C-NHAP高度碳酸化，并且随着NaHCO _3的增加，碳酸盐离子（CO ₃ ^2-）的引入量增加浸入溶液中的浓度。随着引入C-NHAP的CO ₃ ^2-离子数量的增加，它表现出更高的离子吸附性能。C-NHAP对Sr ²⁺的分布系数（K _d  =  24,780 mL g ^-1）分别比斜发沸石和未经处理的骨大约高20倍和250倍。C-NHAP还显示出对Sr ^2+的高吸附容量（Q _e = 125 mg g ^-1）。扩展的X射线吸收精细结构光谱表明，CO ₃ ^2-  C-NHAP的位点对其高吸附性能起着重要作用。C-NHAP对Cd 2 ⁺，Pb ²⁺和Cu ²⁺表现出高吸附性。由骨废料制备的C-NHAP是一种环保，高性能，低成本的材料，应可用于去除环境污染物和食物垃圾。