Homogenous Persulfate and Periodate Photochemical Treatment of Furfural in Aqueous Solutions. Issue 3 (10th February 2017)

• Record Type: Journal Article
• Authors: Saien, Javad; Moradi, Mehrdad; Soleymani, Ali Reza
• Is Part Of: Clean. Volume 45:Issue 3(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-02-10
• Subjects: Degradation -- First order kinetics -- Operating cost -- UV/Periodate -- UV/Persulfate; Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201600460
• Languages: English
• ISSNs: 1863-0650

Abstract

Abstract : This study aimed to degrade and mineralize furfural as a pollutant in wastewater. For this purpose, homogeneous advanced oxidation processes of UV/potassium persulfate (UV/KPS) and UV/potassium periodate (UV/KPI), along with an upward flow photoreactor, equipped with an 8 W UV‐C lamp were employed. In order to design the experiments, modeling, and optimizations, central composite design method was used. Based on the results, the variation of furfural degradation efficiency(DE) with initial concentration of oxidants and media pH was presented by the proposed quadratic equations. After 25 min treatment, 45.1 and 93.8% DEs were obtained under the optimum conditions of pH 4.6, [KPS]0 = 2195.0 mg/L, and pH 5.1, [KPI]0 = 1817.0 mg/L, respectively, and 7.1 and 74.6% mineralization, based on COD criterion. Further, the concentration variation revealed that furfural degradation could follow the overall first‐order reaction kinetics. In addition, the operating cost was estimated and compared with other processes. Finally, the findings indicated that UV/KPS process is superior to other photochemical methods in furfural degradation. Abstract : Different heterogeneous processes have been previously reported for treatment of furfural solution. Here, homogeneous UV/potassium persulfate (UV/KPS) and UV/potassium periodate (UV/KPI) processes were investigated utilizing a photo‐reactor with 8 W light source. Significant furfural degradation and mineralization were achieved using UV/KPI process under optimum conditions after 25 min; however, the UV/KPS process is much superior from an economic point of view.