Effects of ZnO nanoparticles on aerobic denitrification by strain Pseudomonas stutzeri PCN-1

Fe2+ Alleviated the Toxicity of ZnO Nanoparticles to Pseudomonas tolaasii Y-11 by Changing Nanoparticles Behavior in Solution

“…However, microorganisms are extremely susceptible to environmental factors. In recent decades, engineered nanoparticles (NPs), such as ZnO-NPs, have been widely used in sunscreens, coatings, and paints [6,7]. Commodities containing ZnO-NPs will inevitably be released into the environment during production, use and abandonment [6,8,9].…”

“…In recent decades, engineered nanoparticles (NPs), such as ZnO-NPs, have been widely used in sunscreens, coatings, and paints [6,7]. Commodities containing ZnO-NPs will inevitably be released into the environment during production, use and abandonment [6,8,9]. Finally, it accumulates and deposits in activated sludge [10].…”

“…Finally, it accumulates and deposits in activated sludge [10]. Studies have shown that ZnO-NPs can change the community structure of functional flora in activated sludge [8,9,11] and inhibit enzyme activity [6], thus inhibiting nitrogen removal [12].…”

“…Up to now, many scholars found that Zn 2+ dissolved from ZnO-NPs exhibited ion toxicity [6,10,13,14]. Zhang et al [15] found that the accumulation of toxic Zn 2+ in organisms resulted in the loss of 90% nitrogen removal capacity due to ZnO-NPs shock.…”

Exogenous Fe2+ alleviated the toxicity of CuO nanoparticles on Pseudomonas tolaasii Y-11 under different nitrogen sources

“…Fe 2+ played a role in inhibiting the dissolution of Cu 2+ from CuO-NPs. Previous studies had shown that the composition of the solution (such as a high concentration of divalent cations) affected the dissolution of NPs ( Chen et al, 2017 ; Kang, Mauter & Elimelech, 2009 ; Kunhikrishnan et al, 2015 ). Mao et al (2020) found that the addition of metal cations promoted the aggregation of NPs.…”