Textile Materials and Process Research (LMPTex), National School of Engineering of Monastir (ENIM), 5000 Monastir, Tunisia.
Textile Materials and Process Research (LMPTex), National School of Engineering of Monastir (ENIM), 5000 Monastir, Tunisia; Department of chemistry, College of science Al-Zulfi, Majmaah University, Saudi Arabia.
Int J Biol Macromol. 2019 Aug 15;135:152-162. doi: 10.1016/j.ijbiomac.2019.05.128. Epub 2019 May 21.
Marine algae wereprovedto begoodadsorbentsformany pollutants. In this work, Aegagropila Linnaei (Aegagropila L.) was treated with sodium hydroxideand sodium chlorite. The extracted cellulose content was 18.5%. It was functionalized with Dimethyl diallyl ammonium chloride and diallylamin co-polymer. The products were characterized using Fourier Transform Infra-Red (FT-IR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and thermogravimetric analyses (TGA). The samples were studied as adsorbents of methylene blue(MB) and acid blue 25(AB25) in a controlled batch system. The effect of salts concentration (KCl, NaCl, and CaCl), adsorbent dosage, pH, contact time and initial dye concentration on the adsorption mechanism was discussed. At equilibrium, the adsorption of MB and AB25ontoextracted and functionalized cellulose reached 109 mg/g and 139 mg/g, respectively. Under the same conditions, the adsorption capacity of AB25 and MB onto unmodified Aegagropila L. was, only, 32 mg/g and 47 mg/g. The pseudo second-order kinetic equation exhibited the optimal fitting results. The mean free energy (E = 70.71 to 223.6 Kj/mol), calculated from Dubinin-Radushkevich isotherm, suggested a chemi-sorption mechanism. Overall, the results confirmed that the studied products could be considered as valuable bio-sorbents of dyes from contaminated waters.
海洋藻类被证明是许多污染物的良好吸附剂。在这项工作中，使用氢氧化钠和亚氯酸钠处理琴叶拟石花（Aegagropila Linnaei）。提取的纤维素含量为 18.5%。用二甲基二烯丙基氯化铵和二烯丙基胺共聚物对其进行功能化。使用傅里叶变换红外（FT-IR）、X 射线衍射（XRD）、扫描电子显微镜（SEM）和热重分析（TGA）对产物进行了表征。研究了这些样品作为亚甲基蓝（MB）和酸性蓝 25（AB25）在控制批处理系统中的吸附剂。讨论了盐浓度（KCl、NaCl 和 CaCl）、吸附剂用量、pH 值、接触时间和初始染料浓度对吸附机制的影响。在平衡时，MB 和 AB25 对提取和功能化纤维素的吸附量分别达到 109mg/g 和 139mg/g。在相同条件下，未经修饰的琴叶拟石花对 AB25 和 MB 的吸附容量仅为 32mg/g 和 47mg/g。准二级动力学方程表现出最佳拟合结果。根据杜宾-拉什科夫斯基等温线计算得出的平均自由能（E=70.71 至 223.6 Kj/mol）表明了化学吸附机制。总的来说，结果证实研究的产品可以被认为是受污染水中染料的有价值的生物吸附剂。
