The preparation of calcium acetate from mussel (Mytilus edulis) shells and acetic acid was optimised via design of experiments. The solid product was identified as the monohydrate via powder X-ray diffraction, IR spectroscopy and Thermogravimetric analysis. Comparisons were made to optical grade calcite in place of the bio-sourced calcium carbonate for the synthesis. An exploratory central composite design compared the yield of calcium acetate with respect to shell material used (shells dried in air at room temperature, dried at 220 °C or calcined), concentration of acetic acid, and time. The yield of Ca(CH₃COO)₂·H₂O was optimized further using heated, crushed shells using a custom optimal design. A maximum yield of 93% was reached after 32 h using 9% v/v CH₃COOH or an 85% yield using food-grade white vinegar after 24 h. De-icing experiments showed that Ca(CH₃COO)₂·H₂O produced from waste blue mussel shells melted 6 wt.% of ice at a concentration of 30% (m/v). For comparison, 11 wt.% defrosted using CaCl2 30% (m/v) and 13 wt.% defrosted using NaCl 30% (m/v).

中文翻译：

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从废弃蓝贻贝壳中生产醋酸钙的优化工艺及其用作除冰剂


通过实验设计优化了从贻贝 （Mytilus edulis） 壳和乙酸制备乙酸钙的方法。通过粉末 X 射线衍射、红外光谱和热重分析确定固体产物为一水合物。与光学级方解石代替生物来源碳酸钙进行了合成。探索性中心复合设计比较了醋酸钙在所用壳材料（壳体在室温下在空气中干燥，在 220 °C 下干燥或煅烧）、乙酸浓度和时间方面的产量。The yield of Ca(CH₃COO)₂·使用加热的压碎外壳和定制的优化设计进一步优化了 H₂O。使用 9% v/v CH₃COOH 32 小时后达到最大产量 93%，或使用食品级白醋在 24 小时后达到 85% 的产量。除冰实验表明，Ca（CH₃COO）₂·由废弃蓝贻贝壳产生的 H₂O 以 30% 的浓度 （m/v） 融化了 6 wt.% 的冰。相比之下，使用 CaCl2 30% （m/v） 解冻 11 wt.%，使用 NaCl 30% （m/v） 解冻 13 wt.%。