Identifying the factors that influence the reactivity of effluent organic matter with hydroxyl radicals

Keen, Olya S.; McKay, Garrett; Mezyk, Stephen P.; Linden, Karl G.; Rosario‐Ortiz, Fernando L.

doi:10.1016/j.watres.2013.10.049

Cited by 131 publications

(75 citation statements)

References 29 publications

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“…Electron pulse radiolysis techniques and ozonation tests are employed to determine absolute bimolecular reaction rate constants (k OH·-EfOM ) for the reactions between OH· and EfOM (or certain EfOM isolates) [73][74][75][76][77]. The rate constants broadly range between 0.27 and 35.0×10 8 [78].…”

Section: Aops For Treatment Of Effluent Organic Matters In Biologicalmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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Advanced oxidation processes (AOPs) were first proposed in the 1980s for drinking water treatment and later were widely studied for treatment of different wastewaters. During the AOP treatment of wastewater, hydroxyl radicals (OH·) or sulfate radicals (SO 4 ·− ) are generated in sufficient quantity to remove refractory organic matters, traceable organic contaminants, or certain inorganic pollutants, or to increase wastewater biodegradability as a pre-treatment prior to an ensuing biological treatment. In this paper, we review the fundamental mechanisms of radical generation in different AOPs and select landfill leachate and biologically treated municipal wastewater as model wastewaters to discuss wastewater treatment with different AOPs. Generally, the treatment efficiencies rely heavily upon the selected AOP type, physical and chemical properties of target pollutants, and operating conditions. It would be noted that other mechanisms, besides hydroxyl radical or sulfate radical-based oxidation, may occur during the AOP treatment and contribute to the reduction of target pollutants. Particularly, we summarize recent advances in the AOP treatment of landfill leachate, as well as advanced oxidation of effluent organic matters (EfOM) in biologically treated secondary effluent (BTSE) for water reuse.

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Section: Aops For Treatment Of Effluent Organic Matters In Biologicalmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

2015

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“…The high concentration of glucose thus had a significant effect on disinfection. Thus, the presence of organic matter in raw water lowers the disinfection efficiency by PPT [47]. Also, the complexity of NOM can affect the disinfection efficiency significantly.…”

Section: Effect Of Natural Organic Mattermentioning

confidence: 99%

Disinfection of water using pulsed power technique: Effect of system parameters and kinetic study

Singh

Babu

Philip

et al. 2016

Chemical Engineering Journal

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“…EfOM is a complex mixture of NOM, soluble microbial products and organic micropollutants, which consists of both dissolved and colloidal organic compounds [25]. EfOM was reported to be the main Å OH scavenger in municipal secondary effluents, due to its moderate reactivity toward Å OH and its relatively high concentration [26,27]. The removal of most of the target OPEs was inhibited because of the complex matrix materials present in the municipal secondary effluent (e.g., EfOM, CO 3…”

Section: Ozone Treatmentmentioning

confidence: 99%

Removal of organophosphate esters from municipal secondary effluent by ozone and UV/H2O2 treatments

Yuan

Lacorte

Cristale

et al. 2015

Separation and Purification Technology

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a b s t r a c tOrganophosphate esters (OPEs) have emerged as a new class of contaminants due to their massive use as flame retardants and plasticizers. These contaminants are toxic to aquatic organisms and some of them are not biodegradable in wastewater treatment plants. This study investigated the degradation kinetics of eight typical OPEs during ozone and UV/H 2 O 2 treatments in Milli-Q water, humic acid (HA) solution, and municipal secondary effluent. The studied OPEs included three chlorinated: tris(2-chloroethyl) phosphate (TCEP), tris(chloropropyl) phosphate (TCPP) and tris(dichloropropyl) phosphate (TDCP); two aromatic: triphenyl phosphate (TPhP) and tricresyl phosphate (TCrP); and three aliphatic: tri-n-butyl phosphate (TnBP), tris(2-butoxyethyl) phosphate (TBEP), and tris(2-ethylhexyl) phosphate (TEHP). Results indicate that the degradation of target OPEs conformed to the pseudo-first-order kinetics and UV/H 2 O 2 was more effective than ozone for their elimination by comparing the overall removal efficiencies and energy consumptions. Two aromatic and two aliphatic OPEs (i.e., TPhP, TCrP, TnBP and TBEP) were effectively degraded by ozone and UV/H 2 O 2 in the test water matrices, while all chlorinated and one aliphatic OPEs (i.e., TCEP, TCPP, TDCP and TEHP) were found to be recalcitrant to oxidation. Moreover, the presence of HA significantly enhanced the degradation of reactive OPEs in ozone treatment.

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Identifying the factors that influence the reactivity of effluent organic matter with hydroxyl radicals

Cited by 131 publications

References 29 publications

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Advanced Oxidation Processes (AOPs) in Wastewater Treatment

Disinfection of water using pulsed power technique: Effect of system parameters and kinetic study

Removal of organophosphate esters from municipal secondary effluent by ozone and UV/H2O2 treatments

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