Irfan Muhammad, Zaheer Fareeda, Hussain Humaira, Naz Muhammad Yasin, Shukrullah Shazia, Legutko Stanislaw, Mahnashi Mater H, Alsaiari Mabkhoot A, Ghanim Abdulnour Ali Jazem, Rahman Saifur, Alshorman Omar, Alkahtani Fahad Salem, Khan Mohammad K A, Kruszelnicka Izabela, Ginter-Kramarczyk Dobrochna
Electrical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran 11001, Saudi Arabia.
Department of Physics, University of Agriculture, Faisalabad 38040, Pakistan.
Materials (Basel). 2022 Jun 5;15(11):4009. doi: 10.3390/ma15114009.
This study is focused on the kinetics and adsorption isotherms of amine-functionalized magnesium ferrite (MgFeO) for treating the heavy metals in wastewater. A sol-gel route was adopted to produce MgFeO nanoparticles. The surfaces of the MgFeO nanoparticles were functionalized using primary amine (ethanolamine). The surface morphology, phase formation, and functionality of the MgFeO nano-adsorbents were studied using the SEM, UV-visible, FTIR, and TGA techniques. The characterized nanoparticles were tested on their ability to adsorb the Pb, Cu, and Zn ions from the wastewater. The kinetic parameters and adsorption isotherms for the adsorption of the metal ions by the amine-functionalized MgFeO were obtained using the pseudo-first-order, pseudo-second-order, Langmuir, and Freundlich models. The pseudo-second order and Langmuir models best described the adsorption kinetics and isotherms, implying strong chemisorption via the formation of coordinative bonds between the amine groups and metal ions. The Langmuir equation revealed the highest adsorption capacity of 0.7 mmol/g for the amine-functionalized MgFeO nano-adsorbents. The adsorption capacity of the nanoadsorbent also changed with the calcination temperature. The MgFeO sample, calcined at 500 °C, removed the most of the Pb (73%), Cu (59%), and Zn (62%) ions from the water.
本研究聚焦于胺官能化镁铁氧体（MgFeO）处理废水中重金属的动力学和吸附等温线。采用溶胶 - 凝胶法制备MgFeO纳米颗粒。使用伯胺（乙醇胺）对MgFeO纳米颗粒的表面进行官能化。利用扫描电子显微镜（SEM）、紫外可见光谱、傅里叶变换红外光谱（FTIR）和热重分析（TGA）技术研究了MgFeO纳米吸附剂的表面形态、相形成和官能团。对表征后的纳米颗粒吸附废水中Pb、Cu和Zn离子的能力进行了测试。使用准一级、准二级、朗缪尔和弗伦德利希模型获得了胺官能化MgFeO吸附金属离子的动力学参数和吸附等温线。准二级模型和朗缪尔模型最能描述吸附动力学和等温线，这意味着通过胺基与金属离子之间形成配位键发生强烈的化学吸附。朗缪尔方程显示胺官能化MgFeO纳米吸附剂的最高吸附容量为0.7 mmol/g。纳米吸附剂的吸附容量也随煅烧温度而变化。在500℃煅烧的MgFeO样品从水中去除了大部分的Pb（73%）、Cu（59%）和Zn（62%）离子。
