Removal of organic carbon from wastepaper pulp effluent by lab-scale solar photo-Fenton process

Xu, Min; Wang, Qishan; Hao, Yong

doi:10.1016/j.jhazmat.2007.02.015

Cited by 59 publications

(28 citation statements)

References 17 publications

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“…As shown in Table 1, it is confirmed the values of k trend to increase with the dosage of H 2 O 2 due to the increased generation of hydroxyl radicals, as already mentioned (k 5 0.05704 min 21 as discussed before. The effect of the solution pH on k allow confirming the best performance of the Fenton's reagent in an acid pH, particularly for pH 3, noting it is a remarkable decrease of the values of k when the solution pH increases beyond 3.…”

Section: Kineticssupporting

confidence: 83%

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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Section: Kineticssupporting

confidence: 83%

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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“…Moreover, Xu et al (2007) also reported an almost 70% TOC removal when treating a recycled pulp and paper mill effluent by solar photo-Fenton for 3 hours. Additionally, Amat et al (2005) achieved a 23-50% COD removal in board industry effluents (recycled fibers) depending on the composition of the sample, which better explained the reported differences in wastewater treatment efficiency rather than concentration.…”

Section: Solar Photo-fentonmentioning

confidence: 89%

“…As it has already been pointed out, the optimal treatment would be performed at pH=2.8, which is related to iron speciation in the solution (Hermosilla et al 2009b;Pérez et al 2002a;Torrades et al 2003). Besides, a good TOC removal (> 60%) has also been achieved treating bleaching effluent at an initial pH value of 6, adding the advantage of avoiding the extra operation and cost associated to initial pH adjustment (Xu et al 2007); as well as better treatment results were reported at 50ºC than at a lower treatment temperature in this essay.…”

Section: Solar Photo-fentonmentioning

confidence: 99%

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

Hermosilla

Merayo

Gascó

et al. 2014

Environ Sci Pollut Res

154

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Paper industry is adopting zero liquid effluent technologies to reduce fresh water use and meet environmental regulations, which implies water circuits closure and the progressive accumulation of pollutants that must be removed before water re-use and final wastewater discharge. The traditional water treatment technologies that are used in paper mills (such as dissolve air flotation or biological treatment) are not able to remove recalcitrant contaminants. Therefore, advanced water treatment technologies, such as advanced oxidation processes (AOPs), are being included in industrial wastewater treatment chains aiming to either improve water biodegradability or its final quality. A deep review of the current state of the art regarding the use of AOPs for the treatment of the organic load of effluents from the paper industry is herein addressed considering mature and emerging treatments for a sustainable water use in this sector. Wastewater composition, which is highly dependent of the raw materials being used in the mills, the selected AOP itself, and its combination with other technologies, will determine the viability of the treatment. In general, all AOPs have been reported to achieve good organics removal efficiencies (COD removal >40%; and about an extra 20% if AOPs are combined with biological stages). Particularly, ozonation has been the most extensively reported and successfully implemented AOP at an industrial scale for effluent treatment or reuse within pulp and paper mills; although Fenton processes (photo-Fenton particularly) have actually addressed better oxidative results (COD removal ≈65-75%) at lab scale, but still need further development at large scale.

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“…Apesar da eficácia em utilizar a radiação UV, o processo foto-Fenton no tratamento de efluentes, além de depender do pH, também depende das concentrações iniciais de H 2 O 2 e Fe(II) e da temperatura (XU et al, 2007).…”

Section: Feunclassified

Pós-tratamento de efluente de indústria de papel e celulose empregando membranas de microfiltração e ultrafiltração combinadas com o processo foto-fenton

Sakurai¹,

Neves²,

Souza³

et al. 2016

Sci. For.

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Removal of organic carbon from wastepaper pulp effluent by lab-scale solar photo-Fenton process

Cited by 59 publications

References 17 publications

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

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

The application of advanced oxidation technologies to the treatment of effluents from the pulp and paper industry: a review

Pós-tratamento de efluente de indústria de papel e celulose empregando membranas de microfiltração e ultrafiltração combinadas com o processo foto-fenton

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