Influence of mineral water constituents, organic matter and water matrices on the performance of the H₂O₂/IO₄⁻-advanced oxidation process

Abstract

We have recently reported that the reaction of H2O2/IO4− could be a new advanced oxidation process for water treatment [N. E. Chadi, S. Merouani, O. Hamdaoui, M. Bouhelassa and M. Ashokkumar, Environ. Sci.: Water Res. Technol., 2019, 5, 1113–1123].

Production of Reactive Oxygen Species by the Reaction of Periodate and Hydroxylamine for Rapid Removal of Organic Pollutants and Waterborne Bacteria

“…In addition, the EPR 1 O 2 signal in the PI/H 2 O 2 solution was little different from that in the PI alone solution (Figure e), which does not support the mechanism of eq . The difference between Figure e and the report of Chadi et al , may be ascribed to high [H 2 O 2 ] 0 of 50 mM used in their study whereas the in situ generated H 2 O 2 in the PI/HA system, if any, should be very low. Therefore, we rule out eq as a source of 1 O 2 in the PI/HA system.…”

“…15 In addition, Chadi et al recently reported the activation of PI with H 2 O 2 to achieve the rapid removal of an organic dye, proposing that ROS such as • OH and 1 O 2 were major reactive species whereas • IO 3 contributed less to dye removal (eqs 13−16). 16,17 Therefore, the reactive species involved in the PI-based AOPs seems complex. The mechanisms are still ambiguous, and the roles of other oxidants like ROS need to be further investigated.…”

Removal of persistent textile dyes from wastewater by Fe(ii)/H2O2/H3NOH+ integrated system: process performance and limitations

“…Chloride is usually known as a hydroxyl radical scavenger, where this reaction can yield less reactive oxidants (Clc and Cl 2 c À ) according to reactions ( 21)- (23). 57 The complexation of Fe(II)/Fe(III) with Cl À through reactions ( 24)-( 27) is another pathway that may cause a decline in oxidation efficiency via consumption of free iron. 19 Cl À + cOH / ClOHc À , k 21 ¼ 4.3 Â 10 9 M À1 s À1 (21)…”

Modeling of Textile Dye Removal from Wastewater Using Innovative Oxidation Technologies (Fe(II)/Chlorine and H2O2/Periodate Processes): Artificial Neural Network-Particle Swarm Optimization Hybrid Model

“… 56 f is the transfer function; x j is the neuron’s inputs; and w ij is the link between IL and HL (weights) and the HL’s threshold of j neuron. 50 , 53 Constructing and training neuronal networks has as its primary goal the minimization of the objective function (or fitness function), which in turn leads to better predictions for new input. 52 , 57 The latter compares the output and experimental data sets to determine how well the network operates.…”