Janani B, Al-Mohaimeed Amal M, Raju Lija L, Al Farraj Dunia A, Thomas Ajith M, Khan S Sudheer
Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu India.
Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh, 11495 Saudi Arabia.
J Environ Health Sci Eng. 2021 Jan 28;19(1):389-400. doi: 10.1007/s40201-021-00612-1. eCollection 2021 Jun.
Dyes are highly toxic coloured compounds in nature that are largely applied in paper, food, textile and printing industries. Here, the adsorption technique was performed to remove methyl orange (MO) dye from water by polyethylene glycol (PEG) modified iron oxide nanoparticles (FeO NPs).
The method used for FeO NPs synthesis was chemical precipitation. The particles were analyzed by transmission electron microscope, magnetometer, BET analyzer, fourier-transform infrared spectroscopy, X-ray powder diffraction, zetasizer and particle size analyzer. The influence of pH (4.0 to 10.0), NaCl concentration (0.01 mM to 2 M), adsorbent dosage (1 to 10 mg), and the role of surface charge on adsorptive removal were investigated.
The NPs size, zeta potential and surface area was found to be 26 ± 1.26 nm, 33.12 ± 1.01 mV and 119 m/g respectively. The adsorption of MO on FeO NPs agreed best to Freundlich model (R = 0.965) when compared with Langmuir model (R = 0.249). By comparing pseudo-first-order kinetic model (R = 0.937), kinetic adsorption study was better followed by pseudo-second-order kinetic model (R = 1). The adsorption rate decreased with increasing NaCl concentration. At pH 4, maximum adsorption was noted. The particles were also exhibited excellent antibacterial and antibiofilm activities. The ROS formation, lipid peroxidation and oxidative stress were increased with increase in NPs concentration. The NPs precoated slides exhibited more than 50% growth inhibition.
The investigation denotes the versatile applications of the prepared particles for removing the dye stuffs from industrial effluents and as antibacterial and antibiofilm agent.
染料是自然界中剧毒的有色化合物，广泛应用于造纸、食品、纺织和印刷工业。在此，采用吸附技术通过聚乙二醇（PEG）改性的氧化铁纳米颗粒（FeO NPs）从水中去除甲基橙（MO）染料。
合成FeO NPs所用的方法是化学沉淀法。通过透射电子显微镜、磁力计、BET分析仪、傅里叶变换红外光谱、X射线粉末衍射、zeta电位仪和粒度分析仪对颗粒进行分析。研究了pH值（4.0至10.0）、NaCl浓度（0.01 mM至2 M）、吸附剂用量（1至10 mg）以及表面电荷对吸附去除的作用。
发现纳米颗粒的尺寸、zeta电位和表面积分别为26±1.26 nm、33.12±1.01 mV和119 m/g。与朗缪尔模型（R = 0.249）相比，MO在FeO NPs上的吸附与弗伦德里希模型（R = 0.965）最吻合。通过比较伪一级动力学模型（R = 0.937），动力学吸附研究更好地遵循伪二级动力学模型（R = 1）。吸附速率随NaCl浓度的增加而降低。在pH值为4时，观察到最大吸附量。这些颗粒还表现出优异的抗菌和抗生物膜活性。随着纳米颗粒浓度的增加，活性氧的形成、脂质过氧化和氧化应激增加。预涂有纳米颗粒的载玻片表现出超过50%的生长抑制。
该研究表明所制备的颗粒在从工业废水中去除染料以及作为抗菌和抗生物膜剂方面具有多种应用。
