Assessing the effectiveness and mechanisms of Fe/PS, Fe/HO, and O treatment for water disinfection: Spotlight on VBNC bacteria.

Advanced oxidation processes (AOPs) exhibit significant potential for water disinfection due to their generation of large quantities of highly oxidizing free radicals. However, the neglect of viable but nonculturable (VBNC) cells obscures their true disinfection efficacy and potential environmental health risks. Therefore, the study evaluated the disinfection effectiveness and mechanisms of typical AOPs, including Fe/HO, Fe/persulfate (PS), and O, from the perspective of the production of VBNC bacteria.

Evaluation of the disinfection effect and mechanism of SO and HO UV/persulfate salts.

Although ultraviolet (UV) and persulfate (PS) have been widely used in water disinfection process, their incompleteness of disinfection, such as inducing the production of viable but non-culturable cells (VBNC), has attracted extensive attention. In this study, the disinfection effect of combined UV and PS was evaluated, and the roles of SO and HO radicals in UV/PS disinfection were also analyzed. UV/PS more effectively inactivated cells and reduced the number of culturable cells.

Exploring bisphenol S removal mechanism with multi-enzymes extracted from waste sludge and reed sediment.

4,4'-Sulfonyl-diphenol (BPS), as a widespread environmental hormone-like micropollutant, is difficult to be degraded in the environment. In this study, the removal of BPS with multi-enzymes extracted from waste sludge and reed sediment was studied at 298 K, 310 K, and 328 K. Results show that BPS could be removed efficiently and was time-temperature dependent, which could involve enzymolysis and bio-flocculation.

N-chlorosuccinimide enhancing the antimicrobial effect of benzalkonium chloride on biofilm and its interaction mechanisms.

This study investigated the influence of N-chlorosuccinimide (NCS) pretreatment on the antimicrobial effect of benzalkonium chloride (BZC, representative of QACs) against biofilm bacteria and its mechanisms. Results show that 0.04 - 0.

Metabolism differences of biofilm and planktonic Pseudomonas aeruginosa in viable but nonculturable state induced by chlorine stress.

More than 95% of the bacteria in environment are viable but nonculturable (VBNC). However, it is difficult to elucidate directly the metabolic characteristics of these VBNC bacteria and the differences between biofilm-VBNC bacteria and planktonic-VBNC bacteria. In this study, VBNC P.

Development of a horseradish peroxidase-Fenton-like system for the degradation of sulfamethazine under weak acid condition.

Both horseradish peroxidase (HRP) and ferrous ion (Fe) can degrade organic micropollutants (e.g., sulfamethazine) in the presence of hydrogen peroxide (HO), but they have their own disadvantages, such as low degradation efficiency and low pH condition, respectively.