Transforming waste fish bones into nanoparticles with ultrasound and aqueous organic acids†

Sarah Boudreau, Sabahudin Hrapovic, Emma McIsaac, Edmond Lam, Fabrice Berrué and Francesca M. Kerton
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引用次数: 0

Abstract

Synthesizing materials from biomass has gained significant attention as a step towards achieving a circular economy. Seafood processing by-products (e.g., heads, fins, bones, and viscera) are currently disposed of using unsustainable practices including disposal in landfills and/or at sea. However, fish bones are made of 60% hydroxyapatite and therefore could be utilized as a sustainable feedstock for calcium phosphate materials. In this research, nano-hydroxyapatite particles were prepared from Atlantic salmon (Salmo salar) bones using ultrasound in combination with heat, ball milling, and aqueous acid treatment. The size of the synthesized hydroxyapatite nanoparticles can be tailored depending on the chosen conditions. The smallest particles (d = 29 nm) were produced using aqueous propanoic acid and 15 min ultrasound exposure, whereas heat pre-treatment and ultrasound treatment for 60 min led to more well-defined but larger particles (d = 69 nm). The presence of calcium propanoate on the surface of nanoparticles prepared with propanoic acid was detected by IR spectroscopy and X-ray diffraction. A simplified gate-to-gate life cycle assessment was used to demonstrate that this ultrasound process results in a 97% reduction in CO2 emissions compared to other methods reported in the literature to date.

利用超声波和含水有机酸将废弃鱼骨转化为纳米颗粒†
从生物质中合成材料作为实现循环经济的一个步骤得到了极大的关注。目前,海产品加工副产品(如鱼头、鱼鳍、骨头和内脏)的处理采用不可持续的做法,包括在垃圾填埋场和/或海上处理。然而,鱼骨由60%的羟基磷灰石组成,因此可以用作磷酸钙材料的可持续原料。在这项研究中,利用超声波结合加热、球磨和水酸处理,从大西洋鲑鱼(Salmo salar)的骨头中制备纳米羟基磷灰石颗粒。合成的羟基磷灰石纳米颗粒的大小可以根据所选择的条件进行定制。用丙酸水溶液和超声处理15分钟得到最小的颗粒(d = 29 nm),而加热预处理和超声处理60分钟得到更明确但更大的颗粒(d = 69 nm)。用红外光谱和x射线衍射检测了丙酸制备的纳米颗粒表面丙酸钙的存在。一个简化的门到门的生命周期评估被用来证明,与迄今为止文献中报道的其他方法相比,这种超声过程可以减少97%的二氧化碳排放。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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