Tanning Wastewater Sterilization in the Dark and Sunlight Using Psidium guajava Leaf-Derived Copper Oxide Nanoparticles and Their Characteristics

Natrayan Lakshmaiya; Raviteja Surakasi; V Swamy Nadh; Chidurala Srinivas; Seniappan Kaliappan; Velmurugan Ganesan; Prabhu Paramasivam; Seshathiri Dhanasekaran

doi:10.1021/acsomega.3c05588

Tanning Wastewater Sterilization in the Dark and Sunlight Using Psidium guajava Leaf-Derived Copper Oxide Nanoparticles and Their Characteristics

ACS Omega. 2023 Oct 9;8(42):39680-39689. doi: 10.1021/acsomega.3c05588. eCollection 2023 Oct 24.

Authors

Natrayan Lakshmaiya¹, Raviteja Surakasi², V Swamy Nadh³, Chidurala Srinivas⁴, Seniappan Kaliappan⁵, Velmurugan Ganesan⁶, Prabhu Paramasivam⁷, Seshathiri Dhanasekaran⁸

Affiliations

¹ Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu 602 105, India.
² Department of Mechanical Engineering, Lendi Institute of Engineering and Technology, Jonnada, Vizianagaram, Andhra Pradesh 535005, India.
³ Department of Civil Engineering, Aditya College of Engineering, Surampalem, Andhra Pradesh 533437, India.
⁴ Department of Mechanical Engineering, Vaageswari College of Engineering, Karimnagar, Telangana 505527, India.
⁵ Department of Mechatronics Engineering, KCG College of Technology, KCG Nagar, Karapakkam, Chennai, Tamil Nadu 600097 India.
⁶ Institute of Agricultural Engineering, Saveetha School of Engineering, SIMATS, Chennai, Tamil Nadu 602 105, India.
⁷ Department of Mechanical Engineering, College of Engineering and Technology, Mettu University, Metu 318, Ethiopia.
⁸ Department of Computer Science, UiT The Arctic University of Norway, Tromso 9037, Norway.

Abstract

Employing Psidium guajava (P. guajava) extract from leaves, copper oxide nanoparticles (CuO NPs), likewise referred to as cupric oxide and renowned for their sustainable and harmless biogenesis, have the possibility of being useful for the purification of pollutants as well as for medicinal purposes. The current study examined the generated CuO NPs and their physical qualities by using ultraviolet-visible (UV) spectroscopy. The distinctive peak at 265 nm of the CuO NP production was originally seen. Additionally, an X-ray diffraction (XRD) investigation was conducted to identify the crystalline arrangement of the produced CuO NPs, and a Fourier transform infrared (FTIR) spectroscopy examination was performed to validate the functional compounds of the CuO NPs. Additionally, the synthesized nanoparticles' catalytic activities (wastewater treatment) were analyzed in dark and sunlight modes. The catalytic properties of CuO NPs in total darkness resulted in 64.21% discoloration, whereas exposure to sunshine increased the nanomaterials' catalyst performance to 92.31%. By lowering Cr(VI), Ni, Pb, Co, and Cd in sewage by proportions of 91.4, 80.8, 68.26, 73.25, and 72.4% accordingly, the CuO NP demonstrated its effectiveness as a nanosorbent. Total suspended solids (TSS), total dissolved solids (TDS), chemical oxygen demand (COD), biological demand for oxygen (BOD), and conductance were all successfully reduced by nanotreatment of tanning effluents, with proportion reductions of 93.24, 88.62, 94.21, 87.5, and 98.3%, correspondingly.