| Yazarlar |
Ceyda Senem Uyguner Demirel
Boğaziçi Üniversitesi, Türkiye |
Doç. Dr. Ümit Nazlı TÜRKTEN
Kırşehir Ahi Evran Üniversitesi, Türkiye |
|
Dila Kaya
İstanbul Medeniyet Üniversitesi, Türkiye |
|
Fatma Miray Bekbölet
Türkiye |
| Özet |
| Natural waters contain some carbonaceous materials referred to as dissolved organic matter, which is mainly composed of humic acids (HA). Owing to its polydispersed character related to the presence of diverse molecular size fractions (< 450 kDa to even < 1 kDa), HA displays curious reactivity in natural waters and during water treatment train. In this study, a system-based stepwise approach was tracked by characterizing HA following photolysis, adsorptive interactions, and solar photocatalysis using bare TiO2, sol-gel prepared TiO2, and their respective Cu-doped specimens complementary to kinetic evaluation on this respect. For this purpose, prior to and following each treatment, HA was monitored by dissolved organic carbon content, UV-vis parameters, and fluorescence features. Attenuated total reflection Fourier transform infrared (FTIR), surface-enhanced Raman scattering spectroscopy (SERS), XRD, SEM, EDAX XPS, and DRS were used to characterize the materials and solutions reported in this study. Most significant quantitative variations were attained in UV-vis spectroscopic parameters along with fluorescence characteristics; however, infrared and Raman profiles displayed slight deviations in qualitative measures. Differentiation between the selected photocatalyst specimens could be visualized through molecular size effects pointing out the significance of HA 10 kDa fraction. For the first time, this study reports the degradation of specific fractions of HA as a function of their molecular size fraction. Cu-TiO2 seems to photocatalyze more effectively the degradation of the diverse HA fractions due to their more extended absorption of solar light by this photocatalyst. |
| Anahtar Kelimeler |
| Cu-doped TiO2, Humic acid, Molecular size fractions, UV-vis, Fluorescence, Infrared and Raman spectroscopy |
| Makale Türü | Özgün Makale |
| Makale Alt Türü | SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale |
| Dergi Adı | Environmental Science and Pollution Research |
| Dergi ISSN | 0944-1344 |
| Dergi Tarandığı Indeksler | SCI-Expanded |
| Dergi Grubu | Q2 |
| Makale Dili | Türkçe |
| Basım Tarihi | 07-2022 |
| Doi Numarası | 10.1007/s11356-022-21754-1 |
| Makale Linki | http://dx.doi.org/10.1007/s11356-022-21754-1 |
| Atıf Sayıları | |
| WoS | 5 |
| SCOPUS | 5 |
| Google Scholar | 7 |
