Permanganate release from silica-based hollow mesoporous coagulant combined with UV for spatiotemporal enrichment and degradation of diclofenac sodium

Sun, Qiang; Hu, Xuebin; Zheng, Huaili; An, Yanyan; Qu, Jinyao; Zhang, Zhanmei; Khan, Sarfaraz

doi:10.1016/j.chemosphere.2021.131306

Cited by 4 publications

(1 citation statement)

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“…Briefly, 0.001 mol of nanosilver/copper/gold, 0.22 g of 2,2′-dithiodipyridine (SPY), 0.79 g of acrylamide (AM), 0.01 g of amino acids (3,3-diphenyl- d -alanine, DD; 3,3-diphenyl- l -alanine, DL; fmoc-3,3-diphenyl- l -alanine, FL or fmoc-3,3-diphenyl- d -alanine, FD), and 0.0028 g of azobisisobutylphosphonium hydrochloride were added to 25 mL of deionized water. After bubbling with nitrogen for 15 min, the mixture was irradiated under UVA at a wavelength of 365 nm, provided by Shanghai Laser Special Lighting Electric Appliance Factory, for 60 min. − The nanoelement from the IB group was chelated with 2,2′-dithiodipyridine in aqueous solution with a ratio of 2:1 until the formation of the hydrogel, which resulted in the “opening” of Cp rings of 2,2′-dithiodipyridine, and it was trapped in the hydrogel. , The formation of hydrogels, noted as DD-SPY-AM, DL-SPY-AM, FL-SPY-AM, and FD-SPY-AM, respectively, was estimated through the inverted vial method, indicating that the gravity is resistant to its own weight.…”

Section: Methodsmentioning

confidence: 99%

Nanosilver-Induced Pseudo Cuproptosis of Potentially Pathogenic Bacteria during the Storage of Ozone-Treated Wastewater

Sun,

He,

et al. 2024

ACS EST Water

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The reuse of ozone-treated wastewater, especially for agricultural irrigation, is a crucial strategy to address water scarcity. However, the storage of ozone-treated wastewater contributes to the growth of potentially pathogenic bacteria. This study explores using nanosilver-loaded hydrogels as liners in storage containers to provide sustained antibacterial effects. The results indicate that the antibacterial effect of nanosilver-loaded hydrogels, possessing a three-dimensional porous network structure, is more efficient due to a relatively low concentration of nanosilver in the stored water while increasing the concentration in the immediate vicinity of K-12 Escherichia coli (E. coli) anchored in the pores. The antibacterial mechanism of nanosilver against K-12 E. coli involves a process termed pseudo cuproptosis. Nanosilver did not lead to a significant reduction in basal or ATP-linked respiration, but it did notably decrease the spare capacity of respiration and disrupt bacterial metabolism by binding to lipoylated proteins, including 2-oxoglutarate dehydrogenase E2 subunit (sucB) and dihydrolipoamide Sacetyltransferase (aceF), which are related to the tricarboxylic acid cycle. It also leads to the oligomerization of aceF, and finally causes proteotoxicity to the K-12 E. coli. This process is distinct from known bacterial growth stasis pathways. By understanding this mechanism, the dosage of nanosilver can be effectively controlled, ensuring the safety and efficacy of wastewater reuse for agricultural purposes in the near future.

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