Monitoring Humic Acid Photodegradation by CUPRAC Colorimetric and HPLC Determination of Dihydroxybenzoate Isomers Produced From a Salicylate Probe
Yazarlar (5)
Öğr. Gör. Batuhan Yardımcı Istanbul University-Cerrahpasa, Türkiye
Ferda Dondurmacıoğlu
Istanbul University-Cerrahpasa, Türkiye
Istanbul University-Cerrahpasa, Türkiye
Ayşem Üzer
Istanbul University-Cerrahpasa, Türkiye
Istanbul University-Cerrahpasa, Türkiye
Prof. Dr. Fehime Jülide HIZAL YÜCESOY Yalova Üniversitesi, Türkiye
Reşat Apak
Istanbul University-Cerrahpasa, Türkiye
Istanbul University-Cerrahpasa, Türkiye
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Analytical Letters (Q3) | ||
| Dergi ISSN | 0003-2719 Dergi Bilgileri (2019) | ||
| Dergi Tarandığı Indeksler | SCI | ||
| Makale Dili | İngilizce | Basım Tarihi | 04-2019 |
| Kabul Tarihi | 11-03-2019 | Yayınlanma Tarihi | 24-04-2019 |
| Cilt / Sayı / Sayfa | 52 / 17 / 2710–2723 | DOI | 10.1080/00032719.2019.1594868 |
| Makale Linki | https://www.tandfonline.com/doi/full/10.1080/00032719.2019.1594868 | ||
| UAK Araştırma Alanları |
Analitik Kimya
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| Özet |
| Novel analytical methods were designed for monitoring humic acid photodegradation in environmental waters. Modified CUPric Reducing Antioxidant Capacity (CUPRAC) spectrophotometric and chromatographic methods were used for the determination of dihydroxybenzoate isomers (DHBAs) produced from a salicylate probe, which was hydroxylated by hydroxyl radicals (•OH) produced from the photodegradation of humic acid under ultraviolet A-radiation. The combined use of CUPRAC colorimetry and HPLC was shown to effectively monitor humic acid photodegradation and •OH generation for the first time. The formation of 2,5-dihydroxybenzoate and 2,3-dihydroxybenzoate, as major and minor products, respectively, from the hydroxylation of a salicylate probe was demonstrated by HPLC and confirmed by a modified CUPRAC method to indicate •OH formation from humic acid, which acted as both a generator and absorber of hydroxyl radicals. Salicylate hydroxylation showed an increase between 30 and 50 min of illumination, and was affected by the initial concentration of humic acid up to 0.01% but not by solution pH around the neutral values. Traces of Fe(III) and Mn(II) present in natural waters decreased the •OH production, but EDTA partly restored the probe hydroxylation by chelating these metal cations. Since humic acid-mediated •OH generation may aid in natural disinfection processes, this work may extend our comprehension of concentration- and time-dependent generation of •OH in environmental waters and of the possible effects of other antioxidants. |
| Anahtar Kelimeler |
| CUPRAC spectrophotometry | humic acid | hydroxyl radical | photodegradation | salicylate probe |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Yöksis | 4 |
| Web of Science | 3 |
| Scopus | 4 |