Development of a new recyclable nanocomoposite LDH-TiO2 for the degradation of antibiotic sulfamethoxazole under UVA radiation: An approach towards sunlight

Mourid, El Hassane; Mouchtari, El Mountassir El; Mersly, Lekbira El; Benaziz, Lhaj; Rafqah, Salah; Lakraimi, Mohamed

doi:10.1016/j.jphotochem.2020.112530

Cited by 42 publications

(18 citation statements)

References 77 publications

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“…On the contrary, Mourid et al [90] and Dlugosz et al [91] reported higher rates of photocatalytic SMX removal at higher pH than at lower pH. Such contradicting results of pH effect on SMX photocatalytic removal demonstrate importance of taking into account the role of reactive species.…”

Section: Effect Of Phmentioning

confidence: 97%

“…When SMX and TiO 2 surfaces are both positively or negatively charged, there is no electrostatic attraction between them. As a result, adsorption cannot contribute to SMX removal, and only photocatalytic degradation takes place [90]. Besides, when initial pH is close to pH ZPC of photocatalyst, catalyst aggregation might occur, resulting in reduced surface area and decreased photodegradation efficiency [84].…”

Section: Effect Of Phmentioning

confidence: 99%

“…When the main reactive species in the degradation process are holes (h + ), low pH values favor efficiency of photocatalytic decomposition [89]. On the other hand, if the main reactive species are • OH, then an increase in pH leads to an • OH content increase and, therefore, enhances photodegradation efficiency [84,89,90]. For example, in their research, Wang et al [89] found that h + played major role in the photocatalytic degradation of SMX, while de Matos Rodrigues et al [92] reported • OH and O 2…”

Section: Effect Of Phmentioning

confidence: 99%

“…•− , hydroxyl radicals • OH and peroxide radicals • HO 2 that improve the oxidation rate of pharmaceuticals [107]. As the concentration of dissolved oxygen constantly changes in natural water bodies [90], many researchers have studied its influence on the photocatalytic oxidation of antibiotics.…”

Section: Effect Of Dissolved Oxygen and Oxidantsmentioning

confidence: 99%

“…Mourid et al [90] studied the effect of dissolved oxygen on SMX removal by carrying out photocatalytic tests in aerated and de-aerated media. The decomposition of the antibiotic decreased from 80% in aerated medium to 45% in de-aerated medium, proving the significance of dissolved oxygen in the photocatalytic process.…”

Section: Effect Of Dissolved Oxygen and Oxidantsmentioning

confidence: 99%

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Application of TiO2-Based Photocatalysts to Antibiotics Degradation: Cases of Sulfamethoxazole, Trimethoprim and Ciprofloxacin

2021

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The extensive application of antibiotics in human and veterinary medicine has led to their widespread occurrence in a natural aquatic environment. Global health crisis is associated with the fast development of antimicrobial resistance, as more and more infectious diseases cannot be treated more than once. Sulfamethoxazole, trimethoprim and ciprofloxacin are the most commonly detected antibiotics in water systems worldwide. The persistent and toxic nature of these antibiotics makes their elimination by conventional treatment methods at wastewater treatment plants almost impossible. The application of advanced oxidation processes and heterogeneous photocatalysis over TiO2-based materials is a promising solution. This highly efficient technology has the potential to be sustainable, cost-efficient and energy-efficient. A comprehensive review on the application of various TiO2-based photocatalysts for the degradation of sulfamethoxazole, trimethoprim and ciprofloxacin is focused on highlighting their photocatalytic performance under various reaction conditions (different amounts of pollutant and photocatalyst, pH, light source, reaction media, presence of inorganic ions, natural organic matter, oxidants). Mineralization efficiency and ecotoxicity of final products have been also considered. Further research needs have been presented based on the literature findings. Among them, design and development of highly efficient under sunlight, stable, recyclable and cost-effective TiO2-based materials; usage of real wastewaters for photocatalytic tests; and compulsory assessment of products ecotoxicity are the most important research tasks in order to meet requirements for industrial application.

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Section: Effect Of Phmentioning

confidence: 97%

Section: Effect Of Phmentioning

confidence: 99%