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Treatment of Diphenhydramine with different AOPs including photo-Fenton at circumneutral pH
| Content Provider | Semantic Scholar |
|---|---|
| Author | López, Núria Plaza, Sandra Afkhami, Arsalan Marco, Pilar Carla Aguirre Giménez, Jaime Esplugás, Santiago |
| Copyright Year | 2017 |
| Abstract | Abstract The degradation of diphenhydramine hydrochloride (DPH), via UV–vis/H 2 O 2 , Fenton, photo-Fenton and photocatalysis processes, was studied under different radiation sources. In addition, the Fenton and photo-Fenton processes at acid pH and circumneutral pH have been compared. The importance of the source of irradiation, UV-C (λ = 254 nm), black blue lamps (BLB, λ = 365 nm) and simulated solar radiation (SB, SolarBox), was investigated at lab-scale. Moreover, compound parabolic collectors (CPC), at pilot plant scale with sunlight, have been also applied in photocatalytic treatments. Photo-Fenton process employing black blue lamps gave the best DPH abatement (100% of DPH conversion at 10 min for acid pH and 20 min for circumneutral pH), using the highest Fe 2+ (5 mg/L) and H 2 O 2 (150 mg/L) concentrations at 50 mg/L of initial DPH concentration. Using Fenton, 100% of DPH conversion was reached at 30 min for both pHs tested. In the case of UV-C/H 2 O 2 , 100% of DPH elimination was achieved in 20 min using 150 mg/L of H 2 O 2 . In the photocatalytic process, using 0.4 g TiO 2 /L, after 60 min of irradiation, only 35.7% and 8.7% of DPH conversion have been obtained in SB and CPC, respectively. The DPH degradation in the photocatalytic process was greatly enhanced adding H 2 O 2 . In all the cases, increasing the H 2 O 2 dose enhances the reaction rate due to higher OH production. However, not significant mineralization was obtained. The highest DPH mineralization was 36.8% and 38.5% of TOC reduction with photo-Fenton in BLB lamps using 150 mg/L of H 2 O 2 and 2.5 mg/L of Fe 2+ , for acid pH and circumneutral pH, respectively. The major reaction intermediates these processes were identified by ionization/mass spectrometry and a DPH photo-degradation structures was proposed. |
| Starting Page | 112 |
| Ending Page | 120 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.cej.2016.05.127 |
| Volume Number | 318 |
| Alternate Webpage(s) | http://diposit.ub.edu/dspace/bitstream/2445/114128/1/672978.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.cej.2016.05.127 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
