Colour and COD removal of disperse dye solution by a novel coagulant: Application of statistical design for the optimization and regression analysis

Anouzla, Abdelkader; Abrouki, Younes; Souabi, Salah; Safi, Mohammed; Rhbal, Hicham

doi:10.1016/j.jhazmat.2008.12.039

Cited by 58 publications

(20 citation statements)

References 22 publications

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“…Wastewaters resulting from textile dyeing contain significant concentrations of unfixed dyestuff and considerable quantities of auxiliary products (Grau, 1991). Unfortunately, many of the chemicals and dyes used in textile dyeing are recalcitrant; they are often not biodegradable and eventually toxic (Anouzla et al, 2009). As such substances remain in the effluent they create negative impacts on the receiving water bodies, even when the wastewater is treated together with domestic effluents in WWTPs (Alaton, 2007).…”

Section: Introductionmentioning

confidence: 99%

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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New strategies were herein applied for treating a cotton dyeing wastewater: coagulation/flocculation followed by Fenton's oxidation -Approach 1, Fenton process per se -Approach 2, and Fenton followed by coagulation/flocculation -Approach 3, aiming reducing chemicals consumption. Regarding the cost analysis, which is crucial for deciding on the best strategy to implement, it was found that in Approach 1 and Approach 2 the hydrogen peroxide has a major influence on the total costs as compared to ferrous ion. In Approach 3, the total costs are again mostly related to the consumption of reagents in the oxidation stage. The integration of the Fenton's process followed by coagulation/flocculation provided an effluent that meets the discharge limits, with global organic matter removals of 55.6% for COD, 42.7% for BOD and 70.4% for DOC, and almost complete color reduction (99.6%). However, the combined treatment of coagulation/flocculation followed by Fenton's oxidation exhibits also high overall efficiencies (61.7%, 25.8% and 71.2% for COD, BOD5 and DOC removal, respectively, with almost complete decolorization) but simultaneously smaller operating costs associated with chemicals consumption (0.82 €/m 3 ), putting into evidence the usefulness of the novel strategy implemented: use of the residual dissolved iron employed as coagulant in the first stage as catalyst in the subsequent Fenton's oxidation.

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Section: Introductionmentioning

confidence: 99%

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Rodrigues

Boaventura

Madeira

2014

IJEWM

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“…The synthesis of anti-tuberculosis drug 1,3 -Diphenyl-3-phenylsulfanyl-propan-1-one from the thia-Michael addition between chalcone and thiophenol catalyzed using KF/FAP catalyst was carried out and optimized using the Central Composite Design (CCD) and Response Surface Methodology (RSM) [13]. CCD helps in investigating linear, quadratic, cubic and cross-product effects of the four reaction condition variables on the reaction yield.…”

Section: Discussionmentioning

confidence: 99%

Process Optimization for Synthesis of Anti-Tuberculosis Drug Catalyzed by Fluor apatite Supported Potassium Fluoride

Abrouki¹,

Anouzla²,

Loukili³

et al. 2013

AJTAS

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Abstract:The optimization of the synthesis of anti-tuberculosis drug by thia-Michael addition between thiophenol and chalcone catalyzed using activated Fluorapatite supported potassium fluoride (KF/FAP) was studied using a 2 block central composite design including 4 factors (reaction time, solvent volume, catalyst weight and impregnation ratio). The high reactivity and regioelectivity of our catalyst coupled with their ease of use and reduced environmental problems makes them attractive alternatives to homogeneous basic reagents.

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“…Para minimizar os custos experimentais é necessário utilizar estratégias como o delineamento de experimentos (DOE -Design of Experiments), que, segundo Almeida et al [7], é uma técnica estatística capaz de modelar e otimizar experimentos. Segundo Naves et al [8], metodologia de superfície de resposta (RSM -Response Surface Methodology) é um tipo de DOE amplamente utilizado em vários seguimentos, como nos trabalhos de Tak et al [9], Pi et al [10], Sheydaei et al [11], Anouzla et al [12]. Entre todos os projetos de RSM, existe um arranjo específico conhecido como o arranjo composto central (CCD -Central Composite Design).…”

Section: /142unclassified

Aplicação da Metodologia de Superfície de Resposta para Otimização do Processo de Solda a Ponto no Aço Galvanizado AISI 1006

et al. 2018

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 08 Mar., 2018 Aceito: 16 Maio, 2018 E-mail: fferrazamaral@yahoo.com.br (FFA)Resumo: A soldagem a ponto por resistência elétrica possui um papel importante na fabricação de diversos produtos da indústria. Apesar de sua ampla aplicabilidade, este processo está sujeito a apresentar certa inconsistência na qualidade devido a variáveis controláveis e não controláveis. Desta forma, este estudo busca aplicar a metodologia de superfície de resposta para a obtenção de valores otimizados de fatores controláveis do processo, tais como corrente de soldagem, tempo de soldagem e força do eletrodo. Verificou-se o comportamento das curvas do deslocamento do eletrodo, a fim de observar o efeito da queima do revestimento das chapas de aço carbono galvanizadas. Avaliou-se também o teste de cisalhamento para verificar a deformação na força máxima de ruptura dos corpos de prova. Os resultados da aplicação mostraram que parâmetros elevados de corrente e parâmetros reduzidos dos tempos de ciclo proporcionaram maiores níveis de força e valores desejáveis de indentação. Além disso, foi possível verificar através dos experimentos que os critérios de qualidade do ponto de solda apresentam correlação com as características das curvas de deslocamento do eletrodo, proporcionando uma maneira eficaz para avaliar a qualidade do processo de solda a ponto a partir de testes não destrutivos.Palavras-chave: Solda a ponto por resistência elétrica; Metodologia de superfície de resposta; Otimização; Aço galvanizado; Deslocamento do eletrodo. Application of the Response Surface Methodology for Optimization of the Resistance Spot Welding Process in AISI 1006 Galvanized SteelAbstract: The resistance spot welding has a great importance in the manufacture of several industrial products. Despite its wide applicability, this process is subject to certain quality inconsistency due to controllable and non-controllable variables. Thus, this study seeks to apply the response surface methodology to obtain optimized values of controllable process factors, such as welding current, welding time and electrode strength. The behavior of the electrode displacement curves has been verified in order to observe the burning effect of the coating of the galvanized carbon steel plates. It was also evaluated the shear test to verify the tensile-shear strength of the specimens. The results of the application showed that high current parameters and reduced cycle time parameters provided higher levels of strength and desirable indentation values. In addition, it was possible to verify through the experiments that the quality criteria of the weld point correlate with the characteristics of the displacement curves of the electrode, providing an efficient way to evaluate the quality of the process of wel...

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Colour and COD removal of disperse dye solution by a novel coagulant: Application of statistical design for the optimization and regression analysis

Cited by 58 publications

References 22 publications

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

A new strategy for treating a cotton dyeing wastewater - integration of physical-chemical and advanced oxidation processes

Process Optimization for Synthesis of Anti-Tuberculosis Drug Catalyzed by Fluor apatite Supported Potassium Fluoride

Aplicação da Metodologia de Superfície de Resposta para Otimização do Processo de Solda a Ponto no Aço Galvanizado AISI 1006

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