Degradation and detoxification of formaline wastewater by advanced oxidation processes

Kajitvichyanukul, Puangrat; Lu, Ming‐Chun; Liao, Chih‐Hsiang; Wirojanagud, Wanpen; Koottatep, Thammarat

doi:10.1016/j.jhazmat.2005.11.071

Cited by 57 publications

(30 citation statements)

References 34 publications

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“…The failure of the wastewater treatment plant according to adverse effects of the contaminants on the community of organisms in charge of the biological decomposition of the organic matter was reported [11]. Attempts to reduce the toxicity of the chemicals in hospital were focused in many previous works [12][13][14]. The toxicity of formaldehyde in hospital wastewater was successfully reduced by photo-Fenton process [12].…”

Section: Introductionmentioning

confidence: 89%

Evaluation of biodegradability and oxidation degree of hospital wastewater using photo-Fenton process as the pretreatment method

Kajitvichyanukul

Suntronvipart

2006

Journal of Hazardous Materials

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111

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Section: Introductionmentioning

confidence: 89%

Evaluation of biodegradability and oxidation degree of hospital wastewater using photo-Fenton process as the pretreatment method

Kajitvichyanukul

Suntronvipart

2006

Journal of Hazardous Materials

Self Cite

111

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“…The advanced oxidation processes (AOPs) have been used to treat refractory organic pollutant (Kajitvichyanukul et al 2006;Muruganandham et al 2007;Ay et al 2009;Parsa and Negahdar 2012). The hydroxyl radicals (·OH) are generated in the AOPs and efficiently degrade the toxic organic compounds.…”

Section: Introductionmentioning

confidence: 91%

Factors affecting degradation of dimethyl sulfoxide (DMSO) by fluidized-bed Fenton process

Bellotindos

Methatham

et al. 2014

Environ Sci Pollut Res

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In this study, the target compound is dimethyl sulfoxide (DMSO), which is used as a photoresist stripping solvent in the semiconductor and thin-film transistor liquid crystal display (TFT-LCD) manufacturing processes. The effects of the operating parameters (pH, Fe(2+) and H2O2 concentrations) on the degradation of DMSO in the fluidized-bed Fenton process were examined. This study used the Box-Behnken design (BBD) to investigate the optimum conditions of DMSO degradation. The highest DMSO removal was 98 % for pH 3, when the H2O2 to Fe(2+) molar ratio was 12. At pH 2 and 4, the highest DMSO removal was 82 %, when the H2O2 to Fe(2+) molar ratio was 6.5. The correlation of DMSO removal showed that the effect of the parameters on DMSO removal followed the order Fe(2+) > H2O2 > pH. From the BBD prediction, the optimum conditions were pH 3, 5 mM of Fe(2+), and 60 mM of H2O2. The difference between the experimental value (98 %) and the predicted value (96 %) was not significant. The removal efficiencies of DMSO, chemical oxygen demand (COD), total organic carbon (TOC), and iron in the fluidized-bed Fenton process were higher than those in the traditional Fenton process.

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“…y researchers have studied the degradation of formaldehyde in aqueous medium using dvanced Oxidative Processes [8,19,20,21]. However, the difficulty is much greater when, the aqueous solution of formaldehyde, the residue presents a high concentration of organic nd interferences, as was the case described above.…”

Section: Introductionmentioning

confidence: 99%

“…This is necessary due to large volumes of ated wastes and consequently to the impacts that this cause. The formaldehyde, for example, act with DNA, RNA and proteins, damaging cells and causing the death of microorganisms iological wastewater treatment plants [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the difficulty is much greater when, the aqueous solution of formaldehyde, the residue presents a high concentration of organic and interferences, as was the case described above. (2) Many researchers have studied the degradation of formaldehyde in aqueous medium using different Advanced Oxidative Processes [8,19,20,21]. However, the difficulty is much greater when, along with the aqueous solution of formaldehyde, the residue presents a high concentration of organic compound and interferences, as was the case described above.…”

Section: Introductionmentioning

confidence: 99%

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Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

2010

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25resumo: Um método de correção de interferência espectral e de transporte é proposto, e foi aplicado para minimizar interferências por moléculas de PO produzidas em chama ar-acetileno e de transporte causada pela variação da concentração de ácido fosfórico. . Fixando-se a taxa de aspiração da amostra em 5,0 ml min -1 , e integrando-se a absorbância no comprimento de onda a 3 pixels, curvas analíticas para Pb (0,1 -1,0 mg L -1 ) foram obtidas com coeficientes de correlação típicos ≥ 0,9990. As correlações lineares entre absorbância e concentração de P nos comprimentos de onda 217,0005 e 217,0458 foram ≥ 0,998. O limite de detecção de Pb foi 10 µg L -1 . O método de correção proposto forneceu desvios padrão relativos (n=12) de 2,0 a 6,0%, ligeiramente menores que os obtidos sem correção (1,4-4,3%). As recuperações de Pb adicionado às amostras de ácido fosfórico variaram de 97,5 a 100% (com correção pelo método proposto) e de 105 a 230% (sem correção).Palavras-chave: método de correção por equação matemática; espectrometria de absorção atômica com fonte contínua e de alta resolução; chumbo; ácido fosfórico. Abstract: Laboratories consume great amounts of hazardous chemicals substances and consequently generate wastewater containing them, for example formaldehyde. This substance is widely utilized to preserve biological samples generating many liters of this residue every year. The present work proposes the use of the photo-Fenton process to treat formaldehyde wastewater using sunlight irradiation. Some aspects were investigated such as the iron source, sample and hydrogen peroxide concentration and also the use of stirred systems. The use of ferrioxalate (0.5 mmol L-1) improved the efficiency of the process in relation to the use of iron nitrate, while at least 1.0 mol L-1 H2O2 is necessary to treat the sample of the 500 mg C L-1. Under these conditions, every formaldehyde detectable was degradeted and 89% of the dissolved organic carbon was removed in two hours of exposure to sunlight. These results are satisfaction considerate for São Paulo State Environmental Agency. Artigo/Article PHoto-Fenton ProCeSS For treAting

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Degradation and detoxification of formaline wastewater by advanced oxidation processes

Cited by 57 publications

References 34 publications

Evaluation of biodegradability and oxidation degree of hospital wastewater using photo-Fenton process as the pretreatment method

Evaluation of biodegradability and oxidation degree of hospital wastewater using photo-Fenton process as the pretreatment method

Factors affecting degradation of dimethyl sulfoxide (DMSO) by fluidized-bed Fenton process

Photo-Fenton process for treating biological laboratory wastewater containing formaldehyde

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