Abdelhameed Reda M, Alzahrani Eman, Shaltout Abdallah A, Moghazy Reda M
Applied Organic Chemistry Department, Chemical Industries Research Division, National Research Centre, 33 EL Buhouth St., Dokki, Giza 12622, Egypt.
Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
Int J Biol Macromol. 2020 Dec 15;165(Pt B):2984-2993. doi: 10.1016/j.ijbiomac.2020.10.157. Epub 2020 Oct 24.
The chemical compositions of macroalgae are protein; cholesterol, fatty acid, and lignin which mostly construct from hydroxyl and amine groups. The lignin as a key structure in the tissues of macroalgae was modified using the sulfation pathway. A novel environmental friendly adsorbent Cu-BTC@Algal was synthesized by incorporated Cu-BTC nanoparticles onto sulphated-Macroalgae biomass under solvothermal conditions and characterized by XRD, FTIR, and N adsorption-desorption isotherms. The removal rate of Cu-BTC@Algal was quite greater than that of Cu-BTC, showing that the adsorption performance of porous Cu-BTC can be improved through the modification of algal. Further study revealed that Cu-BTC@Algal exhibited a fast adsorption rate and selective adsorption ability towards the cationic dyes in aqueous solution. The removal rate was up to 97% for cationic dyes methylene blue (MB) and 68% for methyl orange (MO) at intervals 10 min. The influences including initial concentration, and contact time of MB/MO adsorption onto modified algal biomass, Cu-BTC and Cu-BTC@Algal were investigated in detail. The kinetic study indicated that the adsorption of MB/MO onto Cu-BTC@Algal followed the pseudo second-order model. The isotherm obtained from experimental data fitted the Langmuir model, yielding maximum adsorption capacity of 42, 73 and 162 mg g for algal, Cu-BTC and Cu-BTC@Algal, respectively.
大型藻类的化学成分包括蛋白质、胆固醇、脂肪酸和木质素，它们大多由羟基和胺基构成。木质素作为大型藻类组织中的关键结构，通过硫酸化途径进行了改性。在溶剂热条件下，通过将Cu-BTC纳米颗粒负载到硫酸化的大型藻类生物质上，合成了一种新型环保吸附剂Cu-BTC@Algal，并通过XRD、FTIR和N吸附-脱附等温线对其进行了表征。Cu-BTC@Algal的去除率远高于Cu-BTC，表明通过藻类改性可以提高多孔Cu-BTC的吸附性能。进一步研究表明，Cu-BTC@Algal对水溶液中的阳离子染料具有快速吸附速率和选择性吸附能力。在10分钟的间隔内，阳离子染料亚甲基蓝（MB）的去除率高达97%，甲基橙（MO）的去除率为68%。详细研究了初始浓度、MB/MO在改性藻类生物质、Cu-BTC和Cu-BTC@Algal上的吸附接触时间等影响因素。动力学研究表明，MB/MO在Cu-BTC@Algal上的吸附遵循准二级模型。从实验数据得到的等温线符合Langmuir模型，藻类、Cu-BTC和Cu-BTC@Algal的最大吸附容量分别为42、73和162 mg g。
