Removal of tetracycline by denitrifying Mn(II)-oxidizing bacterium Pseudomonas sp. H117 and biomaterials (BMO and MBMO): Efficiency and mechanisms

Efficient Mn(II) removal mechanism by Serratia marcescens QZB-1 at high manganese concentration

“…To investigate the Mn(III) intermediates produced during Mn oxidation by strain QZB-1, sodium pyrophosphate (PP) was selected as the trapping reagent to capture Mn(III) ( Wan et al, 2017 ; Bai et al, 2020 , 2021 ). The isolate QZB-1 was inoculated into an LB medium supplied with 18 mM Mn(II) and cultured at 150 rpm and 30°C for 96 h. The culture medium without Mn(II) or bacterial cells was used as a positive and negative blank control, respectively.…”

ZnO@Bi5O7I Heterojunction Derived from ZIF-8@BiOI for Enhanced Photocatalytic Activity under Visible Light

“…The best adsorption effect was observed at pH = 13, whic might improve the adsorption capacity of the composites through the electrostatic inte action of the photocatalyst surface with TC. Therefore, pH could affect the degradatio efficiency of TC by changing the surface charge of the catalyst and its interaction [46,47] To examine the impacts of pH on the photocatalytic degradation of TC, we performed photocatalytic experiments in differing pH environments. The highest degradation rate was observed for the blank sample (pH = 5), and the degradation rates at different pH values were k blank > k pH=7 > k pH=11 > k pH=3 > k pH=13 (Figure 8b), but TC removals at different pH did not differ significantly (Figure 8a).…”

“…The best adsorption effect was observed at pH = 13, which might improve the adsorption capacity of the composites through the electrostatic interaction of the photocatalyst surface with TC. Therefore, pH could affect the degradation efficiency of TC by changing the surface charge of the catalyst and its interaction [46,47]. To examine the impacts of pH on the photocatalytic degradation of TC, we p formed photocatalytic experiments in differing pH environments.…”

Enhanced photocatalytic performance of anatase titania nanotubes via the synergistic effect of trace copper doping and oxygen vacancies

“…The main pollutants found in water include antibiotics, 5 fertilizers, pesticides, 6 heavy metal ions, 7 organic dyes, 8 and other harmful substances. 6,9,10 To solve these pollutants, researchers have developed a variety of purification methods, including membrane separation, 11 adsorption, 12 biodegradation, 13 chemical precipitation, 14 and photocatalysis, 15,16 among which photocatalysis has been widely studied due to its attractive advantages, including high efficiency, simple operation, complete degradation, and environmental friendliness. 17 The technology of photocatalysis has gained deep and extensive interest since its discovery.…”