Optimization of Fenton oxidation for the removal of methyl parathion in aqueous solution

Saini, Ramesh Kumar; Raghunath, Chelluboyana Vaishnava; Pandey, Poornima; Kumar, Pradeep

doi:10.1016/j.pisc.2016.06.054

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…The R-P model has been widely used to explain the phenomena of dye adsorption [33,57,58]. In the cases of adsorbents based on chitosan Wong et al [59], evaluated the action of chitosan powder in the adsorption of 5 acid azo dyes; Dotto et al [60], used chitosan films for the adsorption of food azo dyes; Juang et al [61]…”

Section: Adsorption Isothermmentioning

confidence: 99%

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Pérez-Calderón

Santos

Zaritzky

2018

Journal of Environmental Chemical Engineering

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Chitosan particles (CP) prepared by coacervation technique were used as bio-sorbent material to remove the azo RR-195 dye; removal percentage (%RM) and adsorption capacity (Q) in batch adsorption experiments under different conditions of bio-sorbent doses, agitation speed and pH medium were determined; the maximum pH of dye removal was 4. Different adsorption equilibrium isotherms were tested and Redlich-Peterson was the model that best fitted experimental results. From the adsorption thermodynamic parameters, it was concluded that the adsorption process of RR-195 onto CP is spontaneous, favorable (ΔG < 0), endothermic (ΔH > 0) and the dye molecules show affinity for the bio-sorbent (ΔS > 0). The maximum monolayer adsorption capacity (Q m ) of CP was 82.1 mg.g −1 at pH = 4 and 318 K; therefore coacervated chitosan particles are among the top three adsorbent agents for this dye. The %RM was 84.2% in 10 h when the initial concentration of the dye was 300 mg.L −1 . The mixed surface reaction and diffusion-controlled kinetic model (MSR-DCK), fitted satisfactorily experimental results, by considering simultaneous mechanisms of diffusion and adsorption process in the active sites. Fourier transform infrared spectroscopy (FTIR) with attenuated total reflection (ATR), scanning electron microscope-energy dispersion spectrometry X-ray (SEM-EDS) and Zeta potential analysis revealed that the interaction between dye molecules and the bio-sorbent are of an electrostatic nature. Desorption/regeneration experiments indicated that CP can be used in adsorptions/desorption cycles for the removal of wastewater containing RR-195. The information presented in this work demonstrates that CP can be a potent eco-friendly bio-adsorbent for the remediation of industrial wastewater. which in turn deteriorates the aquatic biota [7]. Moreover, these toxic compounds affect the human health; several pathologies such as cancer, jaundice, tumors, skin irritation, allergies, heart effects and mutation arise due to exposure to contaminated wastewater [8,9]. The chemical structure of the dyes allows to classify them as anionic (direct, acid and reactive dyes); cationic (basic dyes); and non-ionic (disperse dyes) [4]. The azo dyes are one of the most important synthetic dyes and they are characterized by having an azo group (eN]Ne) as chromophore, in addition to sulfonate groups (-SO 3 − ), giving the molecule its anionic nature. In the present work the removal of the azo dye Reactive Red 195 (RR-195) was analyzed. It is a reactive mono azo dye (description of is chemical structure is provided as Supplementary material, S1). Reactive dyes represent approximately over 12% of the worldwide production [10] and are extensively used in textile and printing industries [11] for dyeing of cellulose, wool and cotton fiber [12]. Reactive dyes form covalent bonds with the fibers that are to be colored;

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Section: Adsorption Isothermmentioning

confidence: 99%

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Pérez-Calderón

Santos

Zaritzky

2018

Journal of Environmental Chemical Engineering

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“…The general objective of the methodology is to investigate the dependence between the experimental conditions (factors) and the responses, optimizing the process with a minimum number of experiments [31]. The CCRD contains a fractional factorial design with center points that is augmented with a group of 'star points' that allow estimation of curvature.…”

Section: Methylene Blue Active Substance Assay (Mbas)mentioning

confidence: 99%

Optimal clarification of emulsified oily wastewater using a surfactant/chitosan biopolymer

Pérez-Calderón

Santos

Zaritzky

2018

Journal of Environmental Chemical Engineering

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“…The Fenton method has been widely investigated for the treatment of organic wastewater streams such as textiles [9,10], pharmaceuticals [11,12], olive mill [13,14], leachate [15], agrochemicals [16,17], etc. In addition, the Fenton method has also been proposed as an environmental friendly approach for the conditioning, dewatering, and filtration of SS.…”

Section: Introductionmentioning

confidence: 99%

Application of Fenton Method for the Removal of Organic Matter in Sewage Sludge at Room Temperature

et al. 2020

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Cement is the most widely used construction material in the world. However, its manufacture is high energy consumption and high carbon emission owing to the high temperature calcination process. Geopolymer is an ideal alternative material for cement because it has a similar structure and performance to cement. In addition, it can be synthesized at room temperature and thus has the advantages of energy saving and carbon emission reduction. Sewage sludge (SS) can be used as raw material for geopolymer synthesis. However, the high organic matter content in SS lowers the mechanical strength of geopolymer. Although the organic matter in SS can be removed by incineration at high temperature, this consumes energy and emits carbon dioxide, which diminishes the advantages of geopolymer. In this study, the Fenton method was applied for the removal of organic matter in SS at room temperature. The parameters of the Fenton method, including the dosages of hydrogen peroxide (H 2 O 2 ) and Fe 2+ reagent (FeSO 4 ·7H 2 O), reaction time, and initial pH value, were investigated. The results indicated that 83.7% of the organic matter in SS could be removed at room temperature by using 5.15 M H 2 O 2 and 5.15 mM FeSO 4 ·7H 2 O at pH 7, which suggested the possibility of sewage sludge reclamation through geopolymer synthesis as an alternative material for cement toward sustainability.

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Optimization of Fenton oxidation for the removal of methyl parathion in aqueous solution

Cited by 15 publications

References 9 publications

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Reactive RED 195 dye removal using chitosan coacervated particles as bio-sorbent: Analysis of kinetics, equilibrium and adsorption mechanisms

Optimal clarification of emulsified oily wastewater using a surfactant/chitosan biopolymer

Application of Fenton Method for the Removal of Organic Matter in Sewage Sludge at Room Temperature

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