Singh Karanpal, Singh Gurjinder, Singh Jagpreet
Department of Electronics Engineering, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, Punjab, India.
Department of Biotechnology, Sri Guru Granth Sahib World University, Fatehgarh Sahib, 140406, Punjab, India.
Environ Res. 2023 Feb 15;219:114952. doi: 10.1016/j.envres.2022.114952. Epub 2022 Dec 9.
Groundwater pollution is mostly caused by overuse of fertilizers, pesticides, contemporary agricultural practices, anthropogenic activities, home waste disposal, and the rapid expansion of the chemical industry. Drinking tainted water on a regular basis can have detrimental consequences on human health as well on environment. Nanoparticles (NPs) based contaminants alleviation strategy found to be most efficient, cost-effective and reliable. In this study, ZnO NPs were synthesized via citrus limon leaves extract as a sustainable/cost-effective method. Diverse microscopic and spectroscopic studies confirmed the formation of spherical ZnO NPs with size range 15-25 nm. Reactive green-19 (RG-19) was degraded photocatalytically under direct solar irradiation (degradation efficiency ∼ 92%, rate constant 0.03 min , 80 min) in the presence of ZnO NPs. These ZnO NPs also demonstrated highly substantial antibacterial action against two pathogenic Gram-positive (Bacillus subtilis, zone of clearance: 8.6 mm) and Gram-negative (Escherichia coli, zone of clearance: 9.8 mm) bacteria. Thus, the present study demonstrates the effective/sustainable NPs based platform for water remediation.
地下水污染主要是由过度使用化肥、农药、当代农业实践、人为活动、家庭废物处理以及化学工业的迅速扩张造成的。经常饮用受污染的水会对人类健康以及环境产生有害影响。基于纳米颗粒（NPs）的污染物缓解策略被认为是最有效、最具成本效益和最可靠的。在本研究中，通过柠檬叶提取物合成了ZnO纳米颗粒，这是一种可持续/具有成本效益的方法。各种微观和光谱研究证实形成了尺寸范围为15 - 25纳米的球形ZnO纳米颗粒。在ZnO纳米颗粒存在的情况下，活性绿-19（RG - 19）在直接太阳辐射下进行光催化降解（降解效率约为92%，速率常数0.03分钟⁻¹，80分钟）。这些ZnO纳米颗粒还对两种致病性革兰氏阳性菌（枯草芽孢杆菌，抑菌圈：8.6毫米）和革兰氏阴性菌（大肠杆菌，抑菌圈：9.8毫米）表现出高度显著的抗菌作用。因此，本研究展示了基于纳米颗粒的有效/可持续的水修复平台。
