Rusu Lăcrămioara, Grigoraș Cristina-Gabriela, Simion Andrei-Ionuț, Suceveanu Elena-Mirela, Istrate Bogdan, Harja Maria
Faculty of Engineering, "Vasile Alecsandri" University of Bacau, 157 Calea Mărăşeşti, 600115 Bacau, Romania.
Mechanical Engineering Faculty, "Gheorghe Asachi" Technical University from Iasi, 43 Mangeron Blvd., 700050 Iasi, Romania.
Polymers (Basel). 2022 Jul 13;14(14):2855. doi: 10.3390/polym14142855.
Two types of biosorbents, based on immobilized in calcium alginate, were studied for the removal of pharmaceuticals from aqueous solutions. Synthetized biocomposite materials were characterized chemically and morphologically, both before and after simulated biosorption. Ethacridine lactate (EL) was chosen as a target molecule. The process performance was interpreted as a function of initial solution pH, biosorbent dose, and initial pharmaceutical concentration. The results exhibited that the removal efficiencies were superior to 90% for both biosorbents, at the initial pH value of 4.0 and biosorbent dose of 2 g/L for all EL initial concentrations tested. Freundlich, Temkin, Hill, Redlich-Peterson, Sips, and Toth isotherms were used to describe the experimental results. The kinetic data were analyzed using kinetic models, such as pseudo-first order, pseudo-second order, Elovich, and Avrami, to determine the kinetic parameters and describe the transport mechanisms of EL from aqueous solution onto biosorbents. Among the tested equations, the best fit is ensured by the pseudo-second-order kinetics model for both biosorbents, with the correlation coefficient having values higher than 0.996. The many potential advantages and good biosorptive capacity of biomass immobilized in calcium alginate recommend these types of biocomposite materials for the removal of pharmaceuticals from aqueous solutions.
研究了基于固定在海藻酸钙中的两种类型的生物吸附剂用于从水溶液中去除药物的情况。在模拟生物吸附之前和之后，对合成的生物复合材料进行了化学和形态学表征。选择乳酸依沙吖啶（EL）作为目标分子。将过程性能解释为初始溶液pH值、生物吸附剂剂量和初始药物浓度的函数。结果表明，在所有测试的EL初始浓度下，当初始pH值为4.0且生物吸附剂剂量为2 g/L时，两种生物吸附剂的去除效率均优于90%。使用Freundlich、Temkin、Hill、Redlich-Peterson、Sips和Toth等温线来描述实验结果。使用动力学模型（如拟一级、拟二级、Elovich和Avrami）分析动力学数据，以确定动力学参数并描述EL从水溶液到生物吸附剂上的传输机制。在测试的方程中，两种生物吸附剂的拟二级动力学模型确保了最佳拟合，相关系数值高于0.996。固定在海藻酸钙中的生物质具有许多潜在优势和良好的生物吸附能力，推荐这些类型的生物复合材料用于从水溶液中去除药物。
