Federal University of Technology - Paraná (UTFPR), Environmental Sciences and Technology Graduate Program, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
Federal University of Technology - Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, 81280-340 Curitiba, Paraná, Brazil.
Food Chem. 2025 Feb 1;464(Pt 1):141592. doi: 10.1016/j.foodchem.2024.141592. Epub 2024 Oct 9.
This study evaluated the passion fruit peel biochar (PFPB) as a novel adsorbent for synthetic food dyes indigotine blue (IB), tartrazine yellow (TY), and ponceau 4R (P4R) removal in single and ternary systems. A macroporous structure and a predominance of basic groups characterized PFPB. The pH study revealed better adsorption at pH 2.0. The response surface methodology optimization for adsorbent dosage and temperature predicted removal efficiencies of 100 % for IB, 79.8 % for TY, and 84.4 % for P4R. Elovich and Redlich-Peterson models better described kinetic and equilibrium, respectively, suggesting the contribution of chemical interactions. Thermodynamic data revealed endothermic, with an inordinate degree and spontaneous adsorption. In the ternary systems, antagonistic effects of interaction were noticed. The adsorption of synthetic effluents showed promising results with removal efficiencies of 99.6 % (IB), 60.2 % (TY), and 51.8 % (P4R). Therefore, we concluded that PFPB is a potential alternative low-cost synthetic food dye removal adsorbent.
本研究评估了百香果果皮生物炭（PFPB）作为一种新型吸附剂，用于去除单一和三元体系中的合成食用染料靛蓝（IB）、柠檬黄（TY）和诱惑红 4R（P4R）。PFPB 具有大孔结构和大量碱性基团的特点。pH 值研究表明，在 pH 2.0 时吸附效果更好。对吸附剂用量和温度的响应面法优化预测，IB 的去除效率为 100%，TY 为 79.8%，P4R 为 84.4%。Elovich 和 Redlich-Peterson 模型分别更好地描述了动力学和平衡，表明存在化学相互作用。热力学数据表明，吸附是吸热的，且具有过度和自发的特性。在三元体系中，观察到相互作用的拮抗效应。对合成废水的吸附表现出良好的去除效果，去除效率分别为 99.6%（IB）、60.2%（TY）和 51.8%（P4R）。因此，我们得出结论，PFPB 是一种潜在的替代低成本合成食用染料去除吸附剂。
