Electrochemical treatment of pentachlorophenol in water and pulp bleaching effluent

Patel, Upendra D.; Suresh, S.

doi:10.1016/j.seppur.2007.10.004

Cited by 49 publications

(26 citation statements)

References 44 publications

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“…The ratio of real/assumed Cl À concentration fluctuated between 0.3 and 0.5. The same as the variation of PCP conversion with different temperatures, the final ratio of real/assumed Cl À concentration under different temperatures in Br À -mediated system also decreased at first (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45) C) and then increased (45-60 C). As the reaction conformed to pseudo-first-order kinetic model which can be depicted by exponential function, the conversion curve was then matched by Eq.…”

Section: Effect Of Temperature On the Degradation Of Pcpmentioning

confidence: 62%

“…It has been reported that potentially harmful byproducts might be electrogenerated in the Cl À indirect electrooxidation processes and then the toxicity of effluent might be increased [29]. But further investigations have proved that these products could be completely degraded in the end [30] and were not identified by GC-Mass [31].…”

Section: Introductionmentioning

confidence: 99%

“…Hitherto, few papers have been published on the degradation of PCP by EO mediated by Cl À [11,31]. Wu et al contrasted the decomposition of PCP at oxidative and reductive potentials in the presence of Cl À employing a Pt electrode as working electrode [11].…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al contrasted the decomposition of PCP at oxidative and reductive potentials in the presence of Cl À employing a Pt electrode as working electrode [11]. Patel et al investigated the disposal of PCP in simulated wastewater and pulp bleaching effluent [31]. Though high efficiency of PCP degradation has been obtained, both papers paid less attention on the electrochemical behaviors of PCP in Cl À -mediated electrochemical system.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Indirect electrochemical oxidation of pentachlorophenol in the presence of different halides: behavior and mechanism

Ma¹,

Yu²,

Yu³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TIndirect electrochemical oxidation (EO) of pentachlorophenol (PCP) wastewater was carried out in the presence of different halides through the electrogeneration of active halide (AH). The EO effect and electrochemical behaviors of PCP under different conditions are present in this paper. The cyclic voltammetry (CV) curves indicated higher electrogeneration efficiency of active halogen in NaBr solution. Chronoamperometric response proved the formation of passivating polymer on anode surface. The conversion rate of PCP was distinctly different for different halides following the order BrThe proper oxidation potential of Br À to active bromine led to the optimal electrooxidation effect of Br À . With the rise of temperature the reaction rate decreased at first from 30 to 45 C and then increased from 45 to 60 C. The complicated variation of PCP conversion on rising temperature was depicted by the electrochemical measurements and a mathematic model.

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Section: Effect Of Temperature On the Degradation Of Pcpmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indirect electrochemical oxidation of pentachlorophenol in the presence of different halides: behavior and mechanism

Ma¹,

Yu²,

Yu³

et al. 2014

Desalination and Water Treatment

View full text Add to dashboard Cite

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“…There are a number of approaches that have been explored to reduce the AOX level in paper mill effluent, which can be categorized as physic-chemical and biological (Kumar 2013). Physic-chemical approaches include adsorption, ultrafiltration, nanofiltration, and reverse osmosis (Patel and Suresh 2008). Biological techniques involve the use of diverse kinds of micro-organisms like bacteria, fungi, algae, and microbes of extreme habitats for reducing AOX and chromophores in pulp mill effluent (Belmonte et al 2006;Ruggaber and Talley 2006;Morales et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Influence of Residual Black Liquor in Pulp on Wastewater Pollution after Bleaching Process

Chen

Lei

et al. 2017

BioResources

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The influence of residual black liquor in pulp on wastewater pollution after the bleaching process was studied. The results show that the CODCr in bleaching effluent has a remarkable linearity with bleaching loss of pulps without residual black liquor. For pulps with some residual black liquor, more than 34% of the overall CODCr is produced by the residual black liquor. It follows that more effective washing to reduce the residual black liquor is an appropriate way to control the pollutant discharges from pulp and paper mill industry.

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The removal of COD from bleaching effluents by Fenton's reagent: Effect of system parameters and kinetic study

Wang

Chen

et al. 2011

Env Prog and Sustain Energy

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Fenton's reagent was now being used as a posttreatment procedure to eliminate the intractable pollutants in the bleaching effluents from pulp mills. To establish cost-efficient operating conditions for the application of Fenton's reagent, the effects of operating conditions such as the dosages of H 2 O 2 , the molar ratio of [Fe 21 ]/[H 2 O 2 ], the value of solution pH and the system temperature on the removal of COD were evaluated systematically. The results showed a suitable operating condition that yields 88.7% of COD removal was obtained at [5 20:1, pH3, 908C, reaction time 120 min. A kinetic study was carried out using a modified pseudo-first-order model. The results showed the COD removal for bleaching effluents by Fenton's reagent followed the first-order reaction kinetics, and the activation energy E a was detected to be 1.68 kJ mol 21 based on the experiments performed at different temperatures. In addition, the results of GC/MS analysis showed organic pollutants in effluents were degraded into organic acids of lower molecular weight under the attack of hydroxyl radicals generated in Fenton's reaction. The results of biodegradability assay indicated the bio-toxic substances in the bleaching effluents were eliminated.

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Electrochemical treatment of pentachlorophenol in water and pulp bleaching effluent

Cited by 49 publications

References 44 publications

Indirect electrochemical oxidation of pentachlorophenol in the presence of different halides: behavior and mechanism

Indirect electrochemical oxidation of pentachlorophenol in the presence of different halides: behavior and mechanism

Influence of Residual Black Liquor in Pulp on Wastewater Pollution after Bleaching Process

The removal of COD from bleaching effluents by Fenton's reagent: Effect of system parameters and kinetic study

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