Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India; Department of Environment Studies, Panjab University, Chandigarh 160014, India.
Department of Chemistry & Center of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India.
Environ Res. 2019 Jan;168:85-95. doi: 10.1016/j.envres.2018.09.024. Epub 2018 Sep 21.
Copper oxide (CuO) nanomaterials (NMs) of different size and morphology were synthesized by Chemical precipitation, Microwave irradiation and Hydrothermal method and characterized by TEM, BET, FTIR, XRD and EDX analysis. As synthesized CuO NMs were utilized for elimination of harmful dyes viz. Direct Red 81 (DR-81) and Coomassie Brilliant blue R-250 (BBR-250) and pathogenic bacteria (Staphylococcus aureus). Owing to their morphology, smaller size and relatively high surface area (40.320 m g), CuO NMs prepared by chemical precipitation method were observed to show better adsorption capacity for both the dyes (68.70 (DR-81) and 73.04 (BBR-250) mg g). The influence of different experimental conditions was studied by the methodical assessments of various parameters such as pH, adsorbent dose, concentration and contact time. Moreover, different adsorption isotherms and pseudo-second order kinetic model were applied to understand the adsorption mechanism. Langmuir model was found to be best fit thus confirming the monolayer adsorption process. To ensure the practical utility of CuO NMs for organic waste removal, the adsorption studies were performed in the presence of different inorganic ions and real water samples. In addition, recovery of the dye and NMs were also carried out effectively by simple method, thus avoiding the secondary pollution. CuO NMs were observed to exhibit significant antibacterial activity against the human pathogenic bacteria. These studies demonstrated that synthesized CuO NMs showed good adsorption efficiency for the removal of harmful dyes and antimicrobial activity against the pathogenic bacteria, which vary as a function of size and surface area.
采用化学沉淀法、微波辐射法和水热法合成了不同尺寸和形态的氧化铜（CuO）纳米材料（NMs），并通过 TEM、BET、FTIR、XRD 和 EDX 分析进行了表征。合成的 CuO NMs 用于去除有害染料，如直接红 81（DR-81）和考马斯亮蓝 R-250（BBR-250）以及病原菌（金黄色葡萄球菌）。由于其形态、较小的尺寸和相对较高的表面积（40.320 m g），通过化学沉淀法制备的 CuO NMs 对两种染料（68.70（DR-81）和 73.04（BBR-250）mg g）显示出更好的吸附能力。通过系统评估各种参数，如 pH 值、吸附剂剂量、浓度和接触时间，研究了不同实验条件的影响。此外，还应用了不同的吸附等温线和拟二级动力学模型来理解吸附机制。结果表明，Langmuir 模型最适合，从而证实了单层吸附过程。为了确保 CuO NMs 用于去除有机废物的实际应用，在存在不同无机离子和实际水样的情况下进行了吸附研究。此外，还通过简单的方法有效地进行了染料和 NMs 的回收，从而避免了二次污染。CuO NMs 对人类病原菌表现出显著的抗菌活性。这些研究表明，合成的 CuO NMs 对去除有害染料具有良好的吸附效率，并对病原菌具有抗菌活性，其活性随尺寸和表面积的变化而变化。
