Zn-Fe-rich granular sludge carbon (GSC) for enhanced electrocatalytic removal of bisphenol A (BPA) and Rhodamine B (RhB) in a continuous-flow three-dimensional electrode reactor (3DER). (10th September 2018)

• Record Type: Journal Article
• Authors: Ji, Jing; Li, Xiu-yan; Xu, Juan; Yang, Xue-yuan; Meng, Hui-shan; Yan, Zi-run
• Is Part Of: Electrochimica acta. Volume 284(2018)
• Page Start: 587
• Page End: 596
• Publication Date: 2018-09-10
• Subjects: Three-dimensional electrochemical reactor (3DER) -- Granular sludge carbon (GSC) -- Particle electrode -- Sewage sludge; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.07.203
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Recycling sewage sludge from wastewater treatment plants is one of the most challenging environmental problems. In this work, we develop a one-step facile synthesis method of converting iron-rich sewage sludge into granular sludge carbon (GSC), further applying as particle electrodes in three-dimensional electrochemical reactor (3DER) for wastewater treatment. Iron in sludge and zinc in activator are in-situ loaded on particle electrodes as catalytic ingredients. The prepared GSC under different pyrolysis temperature are characterized to investigate the physical, chemical and electrochemical properties. The treatment performances of GSC as particle electrodes are evaluated by degrading bisphenol A (BPA) and Rhodamine B (RhB) in a continuous-flow 3DER. The stability of the GSC are evaluated and possible reaction mechanism are explored. Results indicate that GSC fabricated are typical macroporous material, exhibiting good electrocatalytic activity. The 500 °C/GSC packed 3DER shows the best performances in contaminants removal, that was attributed to larger specific surface and superior electrochemical properties with cooperation of iron oxide and zinc oxide components. The 500 °C/GSC prepared are proved to be suitable for utilizing as particle electrodes in 3DER. Our work offers a new strategy for sewage sludge reuse and provides a promising future for 3DER applications. Graphical abstract: Image 1 Highlights: Sewage sludge-derived GSC was synthesized through a one-step facile method. Fe from sludge and Zn from activation were in-situ loaded on GSC as catalyst. The GSC can be used as particle electrodes in 3DER for wastewater treatment. 500 °C/GSC exhibited excellent catalytic activity by cooperation of ZnO and Fe3 O4 .