Emerging pollutants, such as antibiotics and antibiotic-resistance genes, are becoming increasingly
important sources of safety and health concerns. Drinking water safety, which is closely related to
human health, should receive more attention than natural water body safety. However, minimal
research has been performed on the efficacy of existing treatment processes in water treatment plants
for the removal of antibiotics and antibiotic resistance genes. To address this research gap, this study
detected and analyzed six main antibiotics and nine antibiotic resistance genes in the treatment
processes of two drinking water plants in Wuhan. Samples were collected over three months and then
detected and analyzed using ultra-high-performance liquid chromatography-tandem mass
spectrometry and fluorescence quantitation. The total concentrations of antibiotics and antibiotic
resistance genes in the influent water of the two water plants were characterized as December > March
> June. The precipitation and filtration processes of the Zou Maling Water Plant and Yu Shidun Water
Plant successfully removed the antibiotics. The ozone-activated carbon process increased the removal
rate of most antibiotics to 100%. However, a large amount of antibiotic resistance gene residues
remained in the effluents of the two water plants. The experiments demonstrated that the existing
ozone-activated carbon processes could not effectively remove antibiotic resistance genes. This study
provides a reference for the optimization of drinking water treatment processes for antibiotics and
antibiotic resistance gene removal.
 

This research reveals an innovative way of finding the ultimate time of ultrasonication that offers photothermal capability across carbon black (CB) water nanofluids, a great contribution to the field of solar energy absorption and nanofluid technology. The samples were generated using a two-step procedure with varying ultrasonication periods employed, ranging from 15 to 120 minutes, in concentrations of 0.005 wt% CB nanoparticles and 0.005 wt% sodium dodecyl sulfate (SDS) surfactant. Thirty days after preparation visible observation and UV spectroscopy, scanning electron microscopy (SEM) images, and particle size distribution were used to confirm the samples’ stability. The stability properties results demonstrated the beneficial effects of ultrasonication on the dispersion properties of nanofluids. Ultrasonication of less than 30 minutes resulted in the early sedimentation of nanoparticles. According to the …