Sürdürülebilir Kalkınma Amaçları

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Yazarlar

• Atıcı, Ökkeş(1)
• Aydın, İhsan(1)
• Kıranşan, Murat(1)
• Tiryaki, Deniz(1)

• MakaleYalnız künye2026Scopus SJRQ1/r/gumushane/13577
  Hydrothermal synthesis of do-TAB/CNP@NiO nanocatalyst for efficient photocatalytic degradation of acetaminophen: Characterization, photocatalytic mechanism and degradation pathways of drug wastewater

  Kıranşan, Murat

  This study reports a comprehensive evaluation of acetaminophen (ACT) photocatalytic degradation in aqueous media using hydrothermally synthesized Do-TAB/Clinoptilolite (Do-TAB/CNP), NiO nanoparticles, and a hybrid Do-TAB/CNP@NiO nanocatalyst. The prepared materials were systematically characterized by XRD, FT-IR, SEM-EDX, TEM, XRF, BET surface area, and BJH pore size analyses, confirming their crystalline structure, surface morphology, elemental composition, and porous features. The photocatalytic activity was investigated as a function of catalyst dosage, initial ACT concentration, solution pH, irradiation source, water matrix, and radical scavengers to clarify the degradation behavior and reactive species involved. Under optimal conditions, Do-TAB/CNP@NiO achieved 98.50% ± 0.75% ACT degradation within 120 min, whereas the maximum efficiency reached 99.92% ± 0.82% at 10 mg L−1 ACT under the same catalyst dosage. Kinetic analysis revealed pseudo–first–order behavior, with apparent rate constants (kapp) of 0.0061–0.0565 min−1 for catalyst dosage, 0.0117–0.0599 min−1 for ACT concentration, and 0.0218–0.0350 min−1 for water matrices. Radical scavenging tests verified the dominant contribution of reactive oxygen species and the synergistic interaction between NiO and Do-TAB-modified CNP. The hybrid catalyst exhibited stable reusability, with degradation efficiency decreasing from 98.50% to 89.68% after six cycles. Under optimized conditions, pharmaceutical degradation followed the order MET (99.90%) ' ACT (98.50%) ' SMX (88.45%) ' NAP (86.90%) ' CIP (83.89%) ' NAL (79.17%). Compared with NiO nanoparticles (70.34%), Do-TAB/CNP (63.65%), and raw CNP (54.46%), Do-TAB/CNP@NiO demonstrated markedly enhanced photocatalytic performance, indicating its strong potential for pharmaceutical wastewater treatment applications in water.

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  AtıfScopus2·WoS1·OpenAlex2

  İncele
• MakaleYalnız künye2019Scopus SJRQ2/r/gumushane/15305
  Psychrotolerant bacteria isolated from the leaf apoplast of cold-adapted wild plants improve the cold resistance of bean (Phaseolus vulgaris L.) under low temperature

  Tiryaki, Deniz; Aydın, İhsan; Atıcı, Ökkeş

  We have isolated psychrotolerant bacteria from the leaf apoplast of cold-adapted wild plants and aimed to investigate their effect on the cold resistance of bean (Phaseolus vulgaris L.). Based on the findings of 16S rRNA gene sequence analysis, 20 isolates belonging to 5 bacteria species (Pseudomonas fragi, P. chloropaphis, P. fluorescens, P. proteolytica and Brevibacterium frigoritolerans) were identified in the leaf apoplastic fluid of Draba nemorosa, Galanthus gracilis, Colchicum speciousum, Scilla siberica, Erodium cicutarium, respectively. We have determined that 6 of the 20 isolates have exhibited ACC (1-aminocyclopropane-1-carboxylate) deaminase activity and secreted different extracellular proteins under cold condition (+4 °C) compared to normal growth condition (28 °C). The six isolates were then inoculated independently of each other to the leaves of 10-day-old bean seedlings growing under normal conditions (25/22 °C, 16/8 h photoperiod), and the inoculated and uninoculated (control) seedlings were transferred to cold (9/5 °C, 16/8 h photoperiod) for 3 days. The bacterial inoculations have decreased freezing injury, ice nucleating activity and lipid peroxidation content in parallel with the decrease of reactive oxygen species level such as O2.- and H2O2 in the inoculated seedlings compared to the control. In addition, the inoculations of the isolates have stimulated the activity of apoplastic antioxidant enzymes including superoxide dismutase, catalase, peroxidase, and glutathione reductase. The results show that the inoculations improve the cold resistance of bean seedlings and the psychrotolerant bacterial isolates can be evaluated within the group of plant growth promoting bacteria (PGPB) which can increase tolerance of cold-sensitive crops.

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  AtıfScopus92·WoS66·OpenAlex98

  İncele