Nanoceramics and novel functionalized silicate-based magnetic nanocomposites as substitutional disinfectants for water and wastewater purification

• Published in: Environmental science and pollution research international Vol. 27; no. 21; pp. 26668 - 26680
• Main Authors: Abou Hammad, Ali B., El Nahwary, Amany M., Hemdan, Bahaa A., Abia, Akebe Luther King
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2020; Springer Nature B.V
• Subjects: Anti-Bacterial Agents; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Carbamate pesticides; Carbamates (tradename); Cholinesterase; Chronic exposure; Cobalt; Correlation coefficients; Crystallization; Disease control; Disinfectants; E coli; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Erythrocytes; Escherichia coli; Exposure; Females; Gynecology; Inflammatory diseases; Inhibitors; Listeria monocytogenes; Magnetic Phenomena; Microbial Sensitivity Tests; Nanocomposites; Obstetrics; Organophosphates; Pelvic inflammatory disease; Pesticides; Research Article; Silicates; Silicon Dioxide; Spectroscopy, Fourier Transform Infrared; Waste Water; Waste Water Technology; Wastewater purification; Wastewater treatment; Water; Water Management; Water Pollution Control; X-Ray Diffraction; Egypt; RT magnetization; Sol-gel method; Bacterial pathogens; Magnetic nanoparticles; Minimum inhibitory concentration; SiO; Water and wastewater treatment; CoCuAlSi nanocomposite; SiO2
• DOI: 10.1007/s11356-020-09073-9
• ISSN: 0944-1344

Herein, we successfully synthesized nano-porous Co 2 O 3 /Cu 2 O 3 : Al 2 O 3 : SiO 2 ((0, 5, 7, 9) Co-CAS) using the acidic sol-gel approach and calcined at 800 °C for 4 h. The crystallization behavior and spectroscopic properties were investigated using X-ray diffraction, field emission-scanning electron microscopy, and Fourier-transform infrared absorption spectra analysis. The antibiotic properties of the nano-porous CAS, 5Co-CAS, and 9Co-CAS magnetic nanocomposites was studied against some potentially pathogenic bacteria in water and wastewater samples. The bacteria tested included Escherichia coli , Salmonella enterica , Pseudomonas aeruginosa , Listeria monocytogenes , Staphylococcus aureus , Enterococcus faecalis , and Bacillus subtilis . Incorporating Co 2 O 3 resulted in the identification of three peaks at 2θ = 10.2°, 13.4°, and 15°. The introduction of cobalt nanoparticles created a ferromagnetic behavior in the CAS nanoceramic, with the magnetic moment and saturation values increasing with increased Co 2 O 3 doping. 9Co-CAS was most potent against all the tested pathogens with minimum inhibitory concentrations of 25 mg/L within 40 min for E. coli and P. aeruginosa and 50 mg/L within 10 min for S. enterica ; the lowest antibacterial activity was observed with the unmodified CAS. The findings revealed that the manufactured nanocomposite materials were potent disinfectants with a promising application for water and wastewater treatment.