B Gayathri Manju, J B Mathangi, P Raji, M Helen Kalavathy
1Department of Physics, Mepco Schlenk Engineering College, Sivakasi, Tamilnadu India.
2Department of Chemical Engineering, A.C.Tech, Anna University, Chennai, Tamilnadu 600025 India.
J Environ Health Sci Eng. 2019 Apr 2;17(2):539-547. doi: 10.1007/s40201-019-00368-9. eCollection 2019 Dec.
A novel approach has been adopted in the synthesis of nickel ferrite nanoparticles and their adsorption capacity was studied in the effective removal of MB dye from aqueous solution. Nanoparticles have a main advantage of treating large amount of wastewater within a short time and producing less contamination. The synthesized Spinel ferrites show high adsorption capacity, magnetic performance, and an eco-friendly material which effectively removes dyes. In the current work Nickel ferrite nanoparticles have been synthesized by wet hydroxyl chemical route using ethylene glycol as a chelating agent. XRD analysis indicates cubic spinel phase nickel ferrite and the average crystallite size is found to be 56.11 nm. An FTIR spectrum illustrates two intense absorption bands in the range between 1000 and 400 cm corresponding to the presence of nickel ferrite. The shape and morphology of Nickel ferrite are examined by SEM analysis. The constituent elements and chemical composition analyzed using EDX spectrum showed that the estimated atomic percentages of O, Fe, and Ni are in good agreement with the theoretical value. VSM analysis clarifies soft ferromagnetic nature at room temperature. The equilibrium time for the removal of MB dye was found to be 180 mins. The capacity of nickel ferrite nanoparticles to adsorb the MB dye was proved from its maximum adsorption capacity of 72 mg g from Langmuir model. The Equilibrium parameter (R) and % error was calculated and found that Langmuir isotherm and Second-order kinetic model gave a good fit to the experimental data.
在镍铁氧体纳米颗粒的合成中采用了一种新方法，并研究了其对水溶液中甲基橙（MB）染料的吸附能力。纳米颗粒的主要优点是能在短时间内处理大量废水且产生较少污染。合成的尖晶石铁氧体具有高吸附能力、磁性能，是一种能有效去除染料的环保材料。在当前工作中，以乙二醇作为螯合剂，通过湿羟基化学路线合成了镍铁氧体纳米颗粒。X射线衍射（XRD）分析表明为立方尖晶石相镍铁氧体，平均晶粒尺寸为56.11纳米。傅里叶变换红外光谱（FTIR）显示在1000至400厘米范围内有两个强吸收带，对应镍铁氧体的存在。通过扫描电子显微镜（SEM）分析研究了镍铁氧体的形状和形态。使用能量散射X射线光谱（EDX）分析的组成元素和化学成分表明，估计的氧、铁和镍的原子百分比与理论值吻合良好。振动样品磁强计（VSM）分析表明在室温下具有软铁磁性质。发现去除MB染料的平衡时间为180分钟。从朗缪尔模型的最大吸附容量72毫克/克证明了镍铁氧体纳米颗粒吸附MB染料的能力。计算了平衡参数（R）和百分比误差，发现朗缪尔等温线和二级动力学模型与实验数据拟合良好。
