AOX removal from pulp and paper wastewater by Fenton and photo-Fenton processes: A real case-study

authors	Ribeiro, JP; Marques, CC; Portugal, I; Nunes, MI
nationality	International
journal	ENERGY REPORTS
author keywords	AOX; Bleaching wastewater; CCED; Fenton; Photo-Fenton; Pulp and paper industry
keywords	ADVANCED OXIDATION PROCESSES; EFFLUENTS; INDUSTRY
abstract	D-0 bleaching wastewater from E. globulus Kraft pulping industry was treated by Fenton and photo-Fenton processes. The aim was to optimize the operational conditions for adsorbable organic halides (AOX) removal, namely oxidant concentration, [H2O2], catalyst concentration, [Fe2+], and treatment time, using the central composite experimental design (CCED) tool. Temperature and pH were set at 60 degrees C and 2, respectively, which are similar to the natural values of the D-0 bleaching wastewater. Both processes showed potential to remove AOX from D-0 with 177 - 178 mM H2O2 and 10 min reaction time. Maximum AOX removal was 85 % for the Fenton process with 8.5 mM Fe2+, and 95 % for the photo-Fenton process with 2.0 mM Fe2+ and UV irradiance 142 W.m(-2). For both methods, the only statistically significant variable (p=0.05) was the concentration of oxidant, [H2O2]. (C) 2019 Published by Elsevier Ltd.
publisher	ELSEVIER
issn	2352-4847
year published	2020
volume	6
beginning page	770
ending page	775
digital object identifier (doi)	10.1016/j.egyr.2019.09.068
web of science category	Energy & Fuels
subject category	Energy & Fuels
unique article identifier	WOS:000518455400121