Study of degradation intermediates formed during electrochemical oxidation of pesticide residue 2,6-dichlorobenzamide (BAM) at boron doped diamond (BDD) and platinum–iridium anodes

Electrochemical removal of Reactive Black 5 azo dye using non-commercial boron-doped diamond film anodes

“…One important issue concerns the degradation pathways of organic pollutants, with particular emphasis on the identification of degradation intermediates or byproducts, to ensure that the treated wastewater is safe for discharge into the environment [37]. However, the degradation pathway depends critically on the formation of •OH, a process that is regulated by the electrodic material employed [38].…”

Electrochemical degradation of 2-diethylamino-6-methyl-4-hydroxypyrimidine using three-dimensional electrodes reactor with ceramic particle electrodes

“…(8)); MO x+1 may cause in selective oxidation (Eq. (9)) [12,13]. When Na 2 SO 4 was used as electrolyte, the Å OH was the main active radical species for the indirect oxidation.…”

“…2-Diethylamino-6-methyl-4-hydroxy pyrimidine (DTMHP) is a typical pesticide intermediate widely used in agricultural, i.e., it is the main raw material for the synthesis of diazinon [3] and pirimiphos methyl [4], which are biorefractory and microtoxic. Recently, many methods have been used to treat this kind of wastewater, such as Fenton's reagent [5,6], photocatalysis [7][8][9], biological techniques [10,11] and electrochemical degradation [12,13]. However, Fenton's reagent will produce a large number of chemical sludge.…”

Reduction in energy consumption of electrochemical pesticide degradation through combination with membrane filtration

“…If the membrane operates with a high rejection of more inert ions such as sulfate and a low rejection of chloride, surface mediated oxidation by hydroxyl radicals and other reactive oxygen species produced in the electrochemical oxygen transfer reaction (EOTR) may be more important. Besides differences in energy efficiency of the two processes, they lead to different degradation pathways and thus different types of DIs as well as total amount of DIs formed in the process [17,18]. Membrane concentrates, especially from RO, have already been identified as applicable water sources for electrochemical oxidation, but the studies have almost exclusively looked at the applicability of the electrochemical oxidation to treat the RO concentrate for specific contaminants, and in these papers, little attention has so far been devoted to investigating specific benefits of the combination [19][20][21][22][23][24][25].…”

“…To provide realistic estimates, natural groundwater pretreated with aeration and sand filtration (tap water) spiked with a micropollutant was used rather than synthetic solutions. The micropollutant used in the study was the persistent pesticide residue 2,6-dichlorobenzamide (BAM), for which both the applicability of NF/RO membranes [26], electrochemical oxidation [17,18] and aeration/sand filtration [27,28] as stand-alone treatment methods have previously been studied by us. In the work on electrochemical oxidation of BAM, the degradation pathways were mapped and BAM was found to be completely mineralized [17,18].…”