Application of electron beam irradiation combined to conventional treatment to treat industrial effluents

Duarte, C.L.; Sampa, M.H.O.; Rela, P.R.; Oikawa, Hisashi; Cherbakian, E.H; Sena, H.C; Abe, Hiroaki; Sciani, V.

doi:10.1016/s0969-806x(99)00453-3

Cited by 26 publications

(8 citation statements)

References 1 publication

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“…The irradiation technique has been proved to be a powerful method in the treatment of some environmental organic contaminants, which are difficult to be degraded by other ways. This method does not cause secondary pollution, and can obtain more efficient treatment results by combining with other methods together (Duarte et al, 2000;Fang and Wu, 1999;Bao et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

A study of biodegradation/γ-irradiation on the degradation of p-chloronitrobenzene

Bao

Gao

Liu

et al. 2009

Radiation Physics and Chemistry

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Section: Introductionmentioning

confidence: 99%

A study of biodegradation/γ-irradiation on the degradation of p-chloronitrobenzene

Bao

Gao

Liu

et al. 2009

Radiation Physics and Chemistry

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“…The various other carbon xerogel-assisted removal techniques mainly include filtration, ion exchange membrane, irradiation, precipitation, and ozonation . Others are solvent extraction, coagulation, adsorption, electrolytic, and biological methods discussed in various papers.…”

Section: Introductionmentioning

confidence: 99%

Carbon Xerogels for Effluent Treatment

Pillai

Kandasubramanian

2020

J. Chem. Eng. Data

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The adsorption process of carbonized xerogels in the form of porous microspheres or monoliths was found to be reversible. This indicated that the xerogels could be reusable, making the process of effluent treatment in eradicating metal ions and reactive dyes cost-effective and propitious. With the outburst of several kinds of water-borne epidemics, concern for effluent treatment has become a more significant factor in the design of new advanced treatment technologies. Consequently, some higher levels of effluent treatments assisted with more advanced materials were able to remove all pollutants from sewage; in contrast, their exorbitant mechanisms created hurdles in a long term perspective. Carbon and its diverse types, such as nanotubes, activated forms, and graphene oxide-incorporated carbon gels, were all studied, and their adsorption of different metal ions, the catalytic reduction, and adsorption of reactive dyes were mentioned concisely. Carbon xerogels possess very low densities (0.04–1.3) g/cm3, micromesoporous size (<50 nm), and large surface areas (600–800) m2/g, and due to their most straightforward route of preparation and high microporous fractions, about 80% during carbonization, they are more preferred over other gels. This review paper discusses the synthesis of xerogels, carbonization processes, various carbon incorporated xerogels, appropriate adsorption isotherms, and the kinetic models they follow, and their efficacies in effluent treatment.

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“…Conventional biochemical oxidative treatment of wastewaters containing azo dye often results in colored water unfit for reuse, while other methods such as coagulation, absorption, chemical oxidation, reverse osmosis, ultrafiltration, photo decomposition, etc., alone or in combination, are found to be ineffectual due to their cost, regeneration or reusability, and secondary pollution (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29). Chemicals such as hypochlorite, ozone, and hydrogen peroxide, in the absence and in the presence of UV light and hydrogen peroxide with ferrous ions, have been used for pretreatment of dye-bearing wastewater (30)(31)(32)(33)(34)(35)(36).…”

Section: Introductionmentioning

confidence: 99%

Laboratory Studies of Electrochemical Treatment of Industrial Azo Dye Effluent

Vaghela

Jethva

Mehta

et al. 2005

Environ. Sci. Technol.

127

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Removal of color and reduction of chemical oxygen demand (COD) in an industrial azo dye effluent containing chiefly reactive dyes were investigated under single-pass conditions at a dimensionally stable anode (DSA) in a thin electrochemical flow reactor at different current densities, flow rates, and dilutions. With 50% diluted effluent, decolorization was achieved up to 85-99% at 10-40 mA/ cm2 at 5 mL/min flow rate and 50-88% at 30-40 mA/ cm2 at high (10-15 mL/min) flow rates. The COD reduction was maximum (81%) at 39.9 mA/cm2 or above when solution-electrode contact time (Ct) was as high as 21.7 s/cm2 and decreased as Ct declined at a given current density. Cyclic voltammetric studies suggesting an indirect oxidation of dye molecules over the anode surface were carried out at a glassy carbon electrode. The effect of pH on decolorization and COD reduction was determined. An electrochemical mechanism mediated by OCl- operating in the decolorization and COD reduction processes was suggested. The effluent was further treated with NaOCI. The oxidized products from the treated effluents were isolated and confirmed to be free from chlorine-substituted products by IR spectroscopy. From the apparent pseudo-first-order rate data, the second-order rate coefficients were evaluated to be 2.9 M(-1) s(-1) at 5 mL/ min, 76.2 M(-1) s(-1) at 10 mL/min, and 156.1 M(-1) s(-1) at 15 mL/ min for color removal, and 1.19 M(-1) s(-1) at 5 mL/min, 1.79 M(-1) s(-1) at 10 mL/min, and 3.57 M(-1) s(-1) at 15 mL/min for COD reduction. Field studies were also carried out with a pilot-scale cell at the source of effluent generation of different plants corresponding to the industry. Decolorization was achieved to about 94-99% with azo dye effluents at 0.7-1.0 L/min flow costing around Indian Rupees 0.02-0.04 per liter, and to about 54-75% in other related effluents at 0.3-1.0 L/min flow under single-pass conditions.

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Application of electron beam irradiation combined to conventional treatment to treat industrial effluents

Cited by 26 publications

References 1 publication

A study of biodegradation/γ-irradiation on the degradation of p-chloronitrobenzene

A study of biodegradation/γ-irradiation on the degradation of p-chloronitrobenzene

Carbon Xerogels for Effluent Treatment

Laboratory Studies of Electrochemical Treatment of Industrial Azo Dye Effluent

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