Sustainable and one-pot fabrication of peptide chelated calcium from fish scale hydrolysates

Journal of Leather Science and Engineering Pub Date : 2024-03-01 DOI:10.1186/s42825-024-00150-0

Hongjie Dai, Yingnan Cao, Yu Fu, Mi Tang, Xin Feng, Liang Ma, Yuhao Zhang

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Abstract

Fish scales, considered as low-value by-products, contain peptides and hydroxyapatite that can be applied to produce peptide chelated calcium directly. This study developed a sustainable and one-pot fabrication method for the peptide-chelated calcium from fish scale hydrolysates (FSP-Ca). During pepsin hydrolysis, the releases of peptides (FSP), calcium, and phosphate from fish scales occurred simultaneously, and the chelation was also effectively performed. After a 6-h hydrolysis, the yield of FSP was 46.18%, and the dissolution rate of calcium was 49.53%. Under the optimal conditions (pH 7, chelation time of 25 min, and chelation temperature of 48 °C), a high chelation rate of 86.16% was obtained, with a calcium content of 81.8 mg/g. The results of UV absorption, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed the successful chelation between FSP and calcium derived from fish scales. The –NH₂, –COO^–, N–H, C=O, C–H, and –OH groups in FSP participated in the formation of FSP-Ca.

Graphical Abstract

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从鱼鳞水解物中一次性可持续地制备多肽螯合钙

被视为低价值副产品的鱼鳞含有肽和羟基磷灰石，可直接用于生产肽螯合钙。本研究开发了一种从鱼鳞水解物中制备肽螯合钙（FSP-Ca）的可持续且一步法的方法。在胃蛋白酶水解过程中，多肽（FSP）、钙和磷酸盐同时从鱼鳞中释放出来，并有效地进行了螯合。经过 6 小时的水解，FSP 的产量为 46.18%，钙的溶解率为 49.53%。在最佳条件下（pH 值为 7，螯合时间为 25 分钟，螯合温度为 48 ℃），螯合率高达 86.16%，钙含量为 81.8 mg/g。紫外吸收、傅立叶变换红外光谱（FTIR）、X 射线衍射（XRD）和扫描电子显微镜（SEM）的结果都证实了 FSP 与鱼鳞中的钙螯合成功。FSP 中的 -NH2、-COO-、N-H、C=O、C-H 和 -OH 基团参与了 FSP-Ca 的形成。

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来源期刊

Journal of Leather Science and Engineering 工程技术-材料科学：综合

CiteScore

12.80

自引率

0.00%

发文量