Assessment of PCDD/Fs formation in the Fenton oxidation of 2-chlorophenol: Influence of the iron dose applied

Vallejo, Marta; Fernández-Castro, Pablo; Román, M. Fresnedo San; Ortiz, Inmaculada

doi:10.1016/j.chemosphere.2015.06.056

Cited by 36 publications

(20 citation statements)

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“…The generation of condensation by-products along the oxidation of persistent organic pollutants by both CWPO and CWAO processes has been evidenced in the literature in a number of works [7,[14][15][16][17][18][19][20]. Poerschmann et al (2009) [15] deeply characterized for the first time the polymeric species generated along the wet peroxide oxidation of phenol with dissolved iron.…”

Section: Introductionmentioning

confidence: 99%

Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part I. Evidences of an Autocatalytic Process

et al. 2019

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The present work is aimed at the understanding of the condensation by-products role in wet peroxide oxidation processes. This study has been carried out in absence of catalyst to isolate the (positive or negative) effect of the condensation by-products on the kinetics of the process, and in presence of oxygen, to enhance the oxidation performance. This process was denoted as oxygen-assisted wet peroxide oxidation (WPO-O2) and was applied to the treatment of phenol. First, the influence of the reaction operating conditions (i.e., temperature, pH0, initial phenol concentration, H2O2 dose and O2 pressure) was evaluated. The initial phenol concentration and, overall, the H2O2 dose, were identified as the most critical variables for the formation of condensation by-products and thus, for the oxidation performance. Afterwards, a flow reactor packed with inert quartz beads was used to facilitate the deposition of such species and thus, to evaluate their impact on the kinetics of the process. It was found that as the quartz beads were covered by condensation by-products along reaction, the disappearance rates of phenol, total organic carbon (TOC) and H2O2 were increased. Consequently, an autocatalytic kinetic model, accounting for the catalytic role of the condensation by products, provides a well description of wet peroxide oxidation performance.

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Section: Introductionmentioning

confidence: 99%

Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part I. Evidences of an Autocatalytic Process

et al. 2019

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“…2, being the most toxic (Malisch 2000;Fueno et al 2002). PCDD and PCDF are acute or chronic toxins, recalcitrant and persistent in nature due to their lipophilic properties and resistance to biological and chemical degradation (Vallejo et al 2015). This leads to biomagnification along food chains and various degrees of toxic effects (Van den Berg et al 2006).…”

Section: Chlorinated Organic Compoundsmentioning

confidence: 99%

Wastewater Treatment and Reclamation: A Review of Pulp and Paper Industry Practices and Opportunities

Hubbe

Metts

Hermosilla

et al. 2016

BioRes

194

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The pulp and paper (P&P) industry worldwide has achieved substantial progress in treating both process water and wastewater, thus limiting the discharge of pollutants to receiving waters. This review covers a variety of wastewater treatment methods, which provide P&P companies with costeffective ways to limit the release of biological or chemical oxygen demand, toxicity, solids, color, and other indicators of pollutant load. Conventional wastewater treatment systems, often comprising primary clarification followed by activated sludge processes, have been widely implemented in the P&P industry. Higher levels of pollutant removal can be achieved by supplementary treatments, which can include anaerobic biological stages, advanced oxidation processes, bioreactors, and membrane filtration technologies. Improvements in the performance of wastewater treatment operations often can be achieved by effective measurement technologies and by strategic addition of agents including coagulants, flocculants, filter aids, and optimized fungal or bacterial cultures. In addition, P&P mills can implement upstream process changes, including dissolved-air-flotation (DAF) systems, filtration save-alls, and kidney-like operations to purify process waters, thus reducing the load of pollutants and the volume of effluent being discharged to end-of-pipe wastewater treatment plants. Keywords: Wastewater treatment; Pulp and paper manufacturing; Advanced oxidation; Membrane technologies; Clarification; Activated sludgeContact information: a: North Carolina State University, Dept. of Forest Biomaterials, Campus Box 8005, Raleigh, NC 29695-8005; b: WestRock Company, Water and Waste Treatment, 600 S 8th St, Fernandina Beach, FL 32034; c: Department of Agricultural and Forestry Engineering, University of Valladolid, Campus Duques de Soria, E-42004 Soria, Spain; d: Complutense University of Madrid, Department of Chemical Engineering, Ingn. Quim, Facultad de Ciencias Químicas, Ciudad Universitaria s/n,S-N, E-28040 Madrid, Spain; e: Concordia University, Dept. Bldg. Civil & Environm. Engn., 1455 Maisonneuve Blvd, West Montreal, PQ H3G 1M8, Canada; f: University of Jyväskylä, Dept. Chem., Box 35, FI-40014 Jyväskylä, Finland; g: Department of Biology, Center for Environmental and Marine Studies, CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; h: Department of Environment and Planning, Center for Environmental and Marine Studies, CESAM, Aveiro & Department of Materials and Ceramics, Institute of Materials, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal; i: FPInnovations, 570 St. Jean Blvd., Pointe Claire, PQ H9R 3J9, Canada; * Corresponding author: hubbe@ncsu.edu Contents of the Article INTRODUCTIONThe pulp and paper (P&P) industry occupies a challenging position with respect to the natural environment. On the positive side, the industry is based on the usage of renewable, photosynthetic resources. On the other hand, the industry discharges huge quantities of aqueous effluents. Large volumes (up to 70 m 3 ) of wastewater ...

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“…Atkinson et al (2015) showed that PCDD/Fs were generated via denovo synthesis during waste combustion, and it is beneficial to develop carbon-based sorbents to destroy PCDD/Fs. Vallejo et al (2015a) also proposed that PCDD/Fs could be formed during remediation of chlorinated phenols via Fenton oxidation, and it could be applied to different concentrations of iron dose to inhibit formation of PCDD/Fs. Table 2 The values of ECR of PCDD/Fs in ambient air from 11 kinds of factories Therefore, reduce residence time in factories, proper personal protection equipment and change incineration styles to lower health risk index, and it is most important to transform combustion process and production process by the actual process of MSWI, MWI, HSWI, SST, MF, OC, IC, OMC, EF, PM and PILI.…”

Section: Health Risk Assessmentmentioning

confidence: 99%

PCDD/Fs profile in ambient air of different types factories and human health risk assessment in Suzhou of Jiangsu province, China

Sun¹,

Tang²,

Chen³

et al. 2017

Atmospheric Pollution Research

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The objective of this study was to assess the potential health risks of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in ambient air of different factories. In this study, fifty-five locations were selected and represented eleven type factories, including municipal solid waste incineration factory (MSWI), hazardous solid waste incineration factory (HSWI), sewage sludge treatment factory (SST), medical waste incineration factory (MWI), electronic factory (EF), pharmaceutical factory in large infusion (PILI), oral medication class factory (OMC), inorganic chemical factory (IC), organic chemical factory (OC), paper mills factory (PM) and mechanical factory (MF). We found that toxic equivalent concentration of PCDD/Fs (TEQ) ranged from 0.236±0.198 to 0.48±0.442 pg I-TEQ/Nm 3 in 11 kinds of factories, and average value of TEQs in 11 factories were lower than atmospheric PCDD/F standard (0.6 pg I-TEQ/m3) announced in Japan, and the mean values of TEQ in ambient air of factories were in the decreasing order of MWI > MSWI > PILI > MF > OC > SST > HSWI > OMC > PM > EF > IC. In addition, lifetime average daily doses (LADDs) and their resultant excess cancer risks (ECRs) for workers in those factories were calculated. The results suggested that potential health risk might be occurred in those ambient air.

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Assessment of PCDD/Fs formation in the Fenton oxidation of 2-chlorophenol: Influence of the iron dose applied

Cited by 36 publications

References 55 publications

Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part I. Evidences of an Autocatalytic Process

Condensation By-Products in Wet Peroxide Oxidation: Fouling or Catalytic Promotion? Part I. Evidences of an Autocatalytic Process

Wastewater Treatment and Reclamation: A Review of Pulp and Paper Industry Practices and Opportunities

PCDD/Fs profile in ambient air of different types factories and human health risk assessment in Suzhou of Jiangsu province, China

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