Publications by authors named "He-Qing Zhang"
Background: Thyroid cancer (TC) prone to cervical lymph node (CLN) metastasis both before and after surgery. Ultrasonography (US) is the first-line imaging method for evaluating the thyroid gland and CLNs. However, this assessment relies mainly on the subjective judgment of the sonographer and is very much dependent on the sonographer's experience.
View Article and Find Full Text PDFOzone, hydrogen peroxide, and peroxymonosulfate disinfection of MS2 coliphage in water.
Environ Sci Process Impacts
May 2024
Article Synopsis
- - The study investigates how well different oxidants—ozone (O), peroxymonosulfate (PMS), and hydrogen peroxide (HO)—can inactivate the MS2 coliphage virus in water, which is important for preventing viral disease spread.
- - Results showed that to achieve a significant 4-log reduction in virus levels, all three oxidants needed specific doses and a contact time of 30 minutes, but ozone was the fastest, requiring only 0.5 minutes.
- - In secondary effluent, all three oxidants effectively inactivated the virus and removed dissolved organic matter, but ozone was found to be the most efficient option overall for disinfection.
Article Synopsis
- Vacuum ultraviolet (VUV) irradiation effectively oxidizes pollutants but doesn't necessarily reduce their toxicity, highlighting the need for more research in real wastewater scenarios.
- In this study, VUV irradiation was found to significantly decrease the cytotoxicity and genotoxicity of secondary effluents when tested on Chinese hamster ovary cells, with reductions of 57%-63% and 56%-61% respectively after 36 minutes.
- Hydroxyl radicals generated during VUV irradiation contributed largely to these reductions in toxicity, while the overall removal of dissolved organic carbon (DOC) was only 15.8%-20.0%, indicating that VUV treatment primarily affects smaller molecular weight compounds and alters chemical properties associated with toxicity.
Antibiotic resistance genes (ARGs) in municipal wastewater pose a potential threat to the environment. In this study, the change in absolute and relative abundance of ARGs, metal resistance genes (MRGs), and mobile genetic elements (MGTs) were investigated during an emergent municipal wastewater treatment by the magnetic separation process. Results indicate that all the concentrations of targeted ARGs, MRGs, and MGTs decreased significantly in the primary and secondary stirring tank.
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