2021年4月
Carbonated nanohydroxyapatite from bone waste and its potential as a super adsorbent for removal of toxic ions
Journal of Environmental Chemical Engineering
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- 巻
- 9
- 号
- 2
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jece.2021.105114
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 (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.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jece.2021.105114
- eISSN : 2213-3437
- SCOPUS ID : 85100592110