Effect of phenol and acetate addition on 2-chlorophenol consumption by a denitrifying sludge

Martínez‐Gutiérrez, Emir; González‐Márquez, Humberto; Martínez-Hernández, Sergio; Texier, Anne‐Claire; Cuervo-López, Flor de María; Gómez, Jorge

doi:10.1080/09593330.2011.627882

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…Analytical Methods 2-CP and phenol concentrations were determined using a high performance liquid chromatography (PerkinElmer Series 200, USA) with a C-18 column (Phenomenex, USA) as previously described by Martínez-Gutiérrez et al [23]. The glucose concentration was determined using a YSI 2700 biochemical analyzer (YSI-2700 Select, USA) with a YSI membrane 2365.…”

Section: Batch Assaysmentioning

confidence: 99%

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Consumption of 2-Chlorophenol Using Anaerobic Sludge: Physiological and Kinetic Analysis

Martínez‐Gutiérrez

Texier

Cuervo-López

et al. 2014

Appl Biochem Biotechnol

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Chlorophenols are toxic and recalcitrant compounds produced by many industrial. Different strategies have been used to improve their biological consumption, but there is insufficient information to understand how the process is carried out. The objective of this study was to evaluate in batch tests the effect of the addition of phenol, acetate, or glucose as electron donors at different concentrations on the efficiencies, yields, and specific rates of 2-chlorophenol (2-CP) consumption. The addition of phenol (177.6 mg C/L), acetate (127.6 mg C/L), or glucose (77.6 mg C/L) increased the 2-CP consumption efficiency up to 54.6, 98.6, and 97.8 %, respectively. With respect to the control assay without electron donor, the specific rate of 2-CP consumption was up to 2.5 times higher with phenol (177.6 mg C/L), 8.4 times higher with acetate (127.6 mg C/L), and 3 times higher with glucose (127.6 mg C/L). The results showed that the type and concentration of electron donor determine the physiological behavior of the anaerobic sludge, modifying efficiency, yield, and specific rate values of the 2-CP consumption process. The addition of readily oxidable cosubstrates seems to be a good alternative and might be used for the biological treatment of industrial wastewater polluted with chlorinated phenols.

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Section: Batch Assaysmentioning

confidence: 99%

“…There are also works which mention that the addition of electron donors (as cosubstrates) can decrease the toxic effects of chlorophenols, improving their consumption efficiency or removal rate [21][22][23]. Ye and Shen [24] observed that the degradation rate of 2-CP was at least 20 % higher in the presence of sucrose than in its absence.…”

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confidence: 98%

Consumption of 2-Chlorophenol Using Anaerobic Sludge: Physiological and Kinetic Analysis

Martínez‐Gutiérrez

Texier

Cuervo-López

et al. 2014

Appl Biochem Biotechnol

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“…The compounds used as co-substrates include compounds of easy oxidation and compounds with a structure similar to chlorophenols. Regarding this, Martínez-Gutiérrez et al [73] evaluated the effects of phenol and acetate on the mineralization of 2-CP by a denitrifying sludge in batch assays. When phenol was used as a co-substrate, the specific rate of 2-CP consumption increased by 2.6 times, regarding to a control assay without co-substrate.…”

Section: Strategies For Improving the Consumption Of Chlorophenolsmentioning

confidence: 99%

Denitrification in the Presence of Chlorophenols: Progress and Prospects

Martínez‐Gutiérrez¹,

Texier²,

Cuervo-López³

et al. 2017

Nitrification and Denitrification

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Diverse industrial effluents may contain recalcitrant compounds such as chlorophenols. Besides, excessive use of pesticides in agriculture is a major cause of the appearance of chlorophenols in surface and groundwater. To mitigate and control the effects of chlorophenols in the environment, various methods have been developed for their elimination. Biological processes represent a sustainable and economical alternative that can lead to the mineralization of chlorophenols and be effective for the removal of these pollutants from different water bodies, such as rivers, groundwater, and wastewater. Some studies have reported that chlorophenols mineralization and nitrate reduction may simultaneously be performed. Other works have suggested that a reductive dechlorination occurs such as the first step and later, the phenol formed is subsequently mineralized by denitrification. However, the published information can be confusing as the denitrifying process is often associated with the sole nitrate consumption without corroborating the total reduction of nitrate to N 2 . Additionally, there are alternative systems that combine biological process with a chemical or electrochemical process for chlorophenols removal. This chapter focuses on the advances accomplished in the study of the removal of chlorophenols under denitrifying conditions with the aim of having a clearer panorama of the treatment alternatives that can be applied for treatment of this type of effluents.

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“…The electrochemical process obtained in the present study might be coupled to a low-cost biological process where phenol could be totally mineralized. 23 Under the experimental conditions established in this study, the stoichiometric transformation of 2-CP into phenol was obtained, limiting the accumulation of others intermediates that could be toxic or inhibitory for the subsequent biological treatment. It has been reported that the limiting step in 2-CP mineralization by microbial processes is the reductive dechlorination of 2-CP to phenol, making very slow the overall process.…”

Section: H Adsmentioning

confidence: 99%

Electrochemical Dechlorination of 2-Chlorophenol on Pd/Ti, Ni/Ti and Pd-Ni Alloy/Ti Electrodes

Arellano-González

Texier

Lartundo-Rojas

et al. 2015

J. Electrochem. Soc.

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The 2-chlorophenol has been treated by advanced oxidation processes (AOPs) and by electrochemical oxidation, but these methods show several disadvantages, such as: high-energy costs, hazardous substances production and electrode deactivation. To avoid the problems caused by oxidation, electrochemical reduction (dechlorination) was proposed as an alternative and promising method. Pd/Ti, Ni/Ti and Pd-Ni alloy/Ti cathodes were used for electrochemical dechlorination of 2-chlorophenol. The cathodes were prepared by electrodeposition under experimental conditions determined from both a thermodynamic study by using predominance existence and distribution species diagrams and a voltammetric study. The electrodes were characterized by SEM, XRD, and XPS. SEM images showed that Pd-Ni/Ti electrode has a different morphology from that of Pd/Ti and Ni/Ti electrodes and the alloy composition is 45% Pd and 49% Ni mol. XRD analyses showed that Pd-Ni alloy /Ti exhibits a network parameter different from those of Pd/Ti and Ni/Ti electrodes. The XPS proved the formation of Pd-Ni alloy. The efficient dechlorination of 2-chlorophenol to phenol was achieved under electrochemical conditions where proton reduction and atomic hydrogen adsorption took place. The Pd-Ni alloy/Ti electrode had the highest dechlorination efficiency (100% removal) and phenol formation (100% formation) at a potential of −0.40 Vvs Ag/AgCl (s) /KCl (sat) .

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Effect of phenol and acetate addition on 2-chlorophenol consumption by a denitrifying sludge

Cited by 17 publications

References 34 publications

Consumption of 2-Chlorophenol Using Anaerobic Sludge: Physiological and Kinetic Analysis

Consumption of 2-Chlorophenol Using Anaerobic Sludge: Physiological and Kinetic Analysis

Denitrification in the Presence of Chlorophenols: Progress and Prospects

Electrochemical Dechlorination of 2-Chlorophenol on Pd/Ti, Ni/Ti and Pd-Ni Alloy/Ti Electrodes

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