Removal of caffeine from aqueous solution by indirect electrochemical oxidation using a graphite-PVC composite electrode: A role of hypochlorite ion as an oxidising agent

Al-Qaim, Fouad Fadhil; Mussa, Zainab Haider; Othman, Mohamed Rozali; Abdullah, Pauzi

doi:10.1016/j.jhazmat.2015.07.007

Cited by 43 publications

(17 citation statements)

References 43 publications

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“…In addition, leaching of CAF or desorption cannot be completely ignored. Previously, an initial increase of toxicity was observed in the electrochemical oxidation of CAF using the graphite-PVC composite which was later decreased with further prolongation of treatment times [6]. This indicates that the prolonged photodegradation time of CAF over CaTaO2N crystals may eventually decrease toxicity similar to that reported by [13].…”

Section: Toxicitysupporting

confidence: 73%

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UVA- and visible-light-driven photocatalytic activity of three-layer perovskite Dion-Jacobson phase CsBa2M3O10 (M=Ta, Nb) and oxynitride crystals in the removal of caffeine from model wastewater

Czech

Hojamberdiev

2016

Journal of Photochemistry and Photobiology A: Chemistry

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Section: Toxicitysupporting

confidence: 73%

“…Caffeine (CAF) (C8H10N4O2), an alkaloid belonging to the methylxanthine family [6], is an example of PPCPs that is often detected in surface waters (pKa 10.4, LogKow -0.007, LogKd 2.3) [7,8]. CAF is present in cola drinks, coffee, tea, energy drinks, and drugs and acts as a psychomotor stimulant [9].…”

Section: Introductionmentioning

confidence: 99%

UVA- and visible-light-driven photocatalytic activity of three-layer perovskite Dion-Jacobson phase CsBa2M3O10 (M=Ta, Nb) and oxynitride crystals in the removal of caffeine from model wastewater

Czech

Hojamberdiev

2016

Journal of Photochemistry and Photobiology A: Chemistry

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“…EOP is a promising technique with different degradation rates for the removal of PPCPs from water and WWTP effluents under optimal conditions concerning the ecological system [98,107,109,110].…”

Section: Applications For Real Water and Wastewater Containing Ppcpsmentioning

confidence: 99%

“…Having regard to these results, EOP is an effective method for further removal of caffeine from effluent from aerobic or anaerobic reactors that treat municipal wastewater, even though a high concentration of caffeine was used compared to low concentration in natural water. Compared to conventional methods for removing caffeine from urban wastewater, this approach appears to be more feasible for the following reasons: ease of operating, rapid removal of caffeine, and the effective efficiency of treatment [110]. The caffeine elimination obtained in real wastewater was found to be higher than in synthetic wastewater due to the contribution of electrogenerated oxidant species, such as hypochlorite [113], when sulfonamides and DEET removal were most efficient in the presence of municipal wastewater treatment plant (MWWTP) effluents [52,102].…”

Section: Applications For Real Water and Wastewater Containing Ppcpsmentioning

confidence: 99%

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

Dao

Yang

Chen

et al. 2020

Water

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Due to various potential toxicological threats to living organisms even at low concentrations, pharmaceuticals and personal care products in natural water are seen as an emerging environmental issue. The low efficiency of removal of pharmaceuticals and personal care products by conventional wastewater treatment plants calls for more efficient technology. Research on advanced oxidation processes has recently become a hot topic as it has been shown that these technologies can effectively oxidize most organic contaminants to inorganic carbon through mineralization. Among the advanced oxidation processes, the electrochemical advanced oxidation processes and, in general, electrochemical oxidation or anodic oxidation have shown good prospects at the lab-scale for the elimination of contamination caused by the presence of residual pharmaceuticals and personal care products in aqueous systems. This paper reviewed the effectiveness of electrochemical oxidation in removing pharmaceuticals and personal care products from liquid solutions, alone or in combination with other treatment processes, in the last 10 years. Reactor designs and configurations, electrode materials, operational factors (initial concentration, supporting electrolytes, current density, temperature, pH, stirring rate, electrode spacing, and fluid velocity) were also investigated.

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“…Moreover, this chemical substance posing high solubility and slow rate of degradation, lead to be more persistent in aquatic environments [10]. However, Al-Qaim et al reported that caffeine can be removed by electrochemical degradation using graphite-poly vinyl chloride as anode as well its by-products which are formed during treatment process [11].…”

Section: Introductionmentioning

confidence: 99%

Determination of Caffeine in Surface Water Using Solid Phase Extraction and High Performance Liquid Chromatography

Al-Qaim

Jusof

Abdullah³

et al. 2017

MJAS

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A new analytical method development based on solid phase extraction (SPE) combined with high performance liquid chromatography (HPLC) was carried out. The optimum working conditions were obtained based on selection of 250 mL sample loading, 0.25 µL methanol as reconstitution solvent, 100% methanol as mobile phase and 270 nm as the optimum wavelength. Good linearity was obtained in the range of 0.015 -400 mg/L and the regression coefficient, R 2 , was 0.995. Limit of detection and quantification were calculated at LOD = 0.06 µg/L and LOQ = 0.2 µg/L respectively. Repeatability and robustness has showed good performance with low relative standard deviation less than 3.29% and 3.50% respectively. Time-of-flight mass spectrometry (TOF/MS) instrument was used to confirm that caffeine is definitely present in surface water with level of concentration ranged from 31.7 to 50.1 µg/L. All results were analyzed statistically using one-way ANOVA, Tukey with interval confidence 95% and P-value 0.05.Keywords: caffeine, stimulant, emerging pollutant, water quality, time of flight/mass spectrometry Abstrak Pembangunan kaedah analisis baru berasaskan pengekstrakan fasa pepejal bersama kromatografi cecair prestasi tinggi (KPCT) telah dijalankan. Kaedah optimum diperolehi berdasarkan tetapan iaitu 250 mL muatan sampel, 0.25 µL metanol sebagai pelarut, 100% methanol sebagai fasa bergerak dan 270 nm panjang gelombang yang optimum. Nilai kelinearan baik diperolehi pada julat kepekatan 0.015 -400 mg/L dan nilai pekali regresi, R 2 ialah 0.995. Had pengesanan dan kuantifikasi dihitung masing -masing pada LOD = 0.06 µg/L and LOQ = 0.2 µg/L. Kebolehulangan dan keteguhan kaedah menunjukkan prestasi baik dengan nilai sisihan piawai relatif yang rendah iaitu masing -masing kurang daripada 3.29% dan 3.50%. Spektrometri jisim masa penerbangan (TOF/MS) digunakan untuk mengesahkan kehadiran kafein di permukaan air dengan aras kepekatan antara julat 31.7 hingga 50.1 µg/L. Keputusan dianalisa mengunakan pendekatan statistik seperti ANOVA satu hala, Tukey dengan aras keyakinan 95% and nilai p 0.05.Kata kunci: kafein, perangsang, pencemar baru, kualiti air, spektrometri jisim/masa penerbangan

show abstract

Removal of caffeine from aqueous solution by indirect electrochemical oxidation using a graphite-PVC composite electrode: A role of hypochlorite ion as an oxidising agent

Cited by 43 publications

References 43 publications

UVA- and visible-light-driven photocatalytic activity of three-layer perovskite Dion-Jacobson phase CsBa2M3O10 (M=Ta, Nb) and oxynitride crystals in the removal of caffeine from model wastewater

UVA- and visible-light-driven photocatalytic activity of three-layer perovskite Dion-Jacobson phase CsBa2M3O10 (M=Ta, Nb) and oxynitride crystals in the removal of caffeine from model wastewater

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

Determination of Caffeine in Surface Water Using Solid Phase Extraction and High Performance Liquid Chromatography

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