Copper-supported pillared clay catalysts for the wet hydrogen peroxide catalytic oxidation of model pollutant tyrosol

Achma, R. Ben; Ghorbel, Abdelhamid; Dafinov, A.; Medina, Françesc

doi:10.1016/j.apcata.2008.07.021

Cited by 50 publications

(16 citation statements)

References 37 publications

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“…The pH was controlled by means of a Hanna pH-meter. The SCOD was assessed by means a fl occulation pretreatment as proposed by Mamais [19], the poly-phenols content according to Folin-Ciocalteau's method [15] and hydrogen peroxide amount by iodometric titration method [5,12]. On treated samples, to avoid the positive interference in COD measurement derived from the presence of H 2 O 2 , [4,18] the residual peroxide was eliminated by adjusting the pH to 11 and heating at 100 °C the corrected solutions for one hour.…”

Section: Methodsmentioning

confidence: 99%

A catalytic oxidation process of olive oil mill wastewaters using hydrogen peroxide and copper

Rosa

Siciliano

2010

Desalination and Water Treatment

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A B S T R AC TThe Mediterranean region is the largest olive oil producer in the world, consequently in this area olive oil mill wastewaters have a high seasonal pollution potential. Due to the presence of phytotoxic compounds, such as poly-phenols, the olive oil mill wastewater is not easily biodegradable, and, therefore, the direct biological treatment is not recommended. Many techniques have been proposed for the their treatment, such as catalytic wet oxidation, ozonization, photo-catalysis, etc., among which, the catalytic oxidation seems to give good results. The present paper reports the results of an experimental investigation carried out with the aim to defi ne a new catalytic oxidation process with hydrogen peroxide using copper-based catalyst, able to reduce the phytotoxicity of olive oil mill wastewaters and to recover the catalyst after oxidation treatment. The experimental results have showed that, operating in a slurry type reactor at mild operating conditions, it is possible to reduce the organic chemical oxygen demand down to 10% and the polyphenols amount of wastewater down to 1%. Therefore, the process is able to increase the rapidly biodegradable substrate content up to 80%, to remove color and total suspend solid amount and to minimize the metal loss of the catalyst after oxidation process, with a recover of about 80% with respect to its initial amount, permitting to reuse it for a long life cycle.

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Section: Methodsmentioning

confidence: 99%

A catalytic oxidation process of olive oil mill wastewaters using hydrogen peroxide and copper

Rosa

Siciliano

2010

Desalination and Water Treatment

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“…Esplugas et al [16] studied and compared the effectiveness of different advanced oxidation processes (ozone and its combination, photolysis and UV/H 2 O 2 , Fenton and photocatalysis) for phenol degradation and showed that the Fenton process has the fastest degradation rate. Furthermore, several research studies have been carried out to investigate the use of different transition metals in homogeneous and heterogeneous form in conjunction with hydrogen peroxide [21][22][23][24][25][26][27][28][29]. Many works demonstrated that the use of Fenton's processes as a primary treatment of OMW enhances the efficiency of anaerobic digestion because the pre-treated effluent is more readily degradable than the original untreated effluent.…”

Section: Introductionmentioning

confidence: 99%

Increase of the anaerobic biodegradability of olive mill wastewaters through a pre-treatment with hydrogen peroxide in alkaline conditions

Siciliano

Stillitano

Rosa

2015

Desalination and Water Treatment

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“…In addition, metalmodified montmorillonites and zeolite were widely reported, and many metals such as Cu, Mn, Fe, Mo, Al and Co (Clark et al, 1997;Varma, 2002;Carriazo et al, 2003;Shinde et al, 2004;Yin & Shi, 2005;Ben Achma et al, 2008;Rama et al, 2011) were commonly used in improving the catalytic abilities of montmorillonites. All these methods require a large excess of sodium azide, a prolonged reaction time and expensive metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

facile, highly efficient and novel method for synthesis of 5-substituted 1H-tetrazoles catalysed by copper(I) chloride

2015

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The present study on tetrazole compounds, which have a wide area of application, proposes a new, simple and highly effective method. A series of 5-substituted 1H-tetrazoles were synthesised in DMF via the [3 + 2] cycloaddition reaction, in which different aryl nitriles with sodium azide were used and copper(I) chloride served as a catalyst. Short reaction times, high yields and simple procedures rendered this method attractive and useful for the organic synthesis of 5-substituted 1H-tetrazoles. A further advantage was the use of an environmentally friendly catalyst.

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Copper-supported pillared clay catalysts for the wet hydrogen peroxide catalytic oxidation of model pollutant tyrosol

Cited by 50 publications

References 37 publications

A catalytic oxidation process of olive oil mill wastewaters using hydrogen peroxide and copper

A catalytic oxidation process of olive oil mill wastewaters using hydrogen peroxide and copper

Increase of the anaerobic biodegradability of olive mill wastewaters through a pre-treatment with hydrogen peroxide in alkaline conditions

facile, highly efficient and novel method for synthesis of 5-substituted 1H-tetrazoles catalysed by copper(I) chloride

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