Removal of basic (Methylene Blue) and acid (Egacid Orange) dyes from waters by sorption on chemically treated wood shavings

Janoš, Pavel; Coşkun, Sezen; Pilařová, Věra; Rejnek, J.

doi:10.1016/j.biortech.2008.06.069

Cited by 117 publications

(53 citation statements)

References 10 publications

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“…Wood burning caused by the process of sawing (dull or Because there were no PAH sources within the sawmill, municipal emissions (from heating) were negligible because the sampling period was rather hot, and one of the biggest Silesian cokeries was about 200 m north of the sawmill, the hard coal coking was assumed to account for such enormously high PM-bound PAH concentrations in the sawmill. The high indoor PAH concentrations can be accounted for by PAH absorption and accumulation in sawdust, a very efficient sorbent of gaseous substances [28,29]. Elsewhere in Zabrze, in the open air, they are lower [18,25], probably because they naturally propagate in the atmosphere [20].…”

Section: Resultsmentioning

confidence: 99%

PAH Concentrations Inside a Wood Processing Plant and the Indoor Effects of Outdoor Industrial Emissions

Rogula-Kopiec

Rogula–Kozłowska

Kozielska³

et al. 2015

Pol. J. Environ. Stud.

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Section: Resultsmentioning

confidence: 99%

PAH Concentrations Inside a Wood Processing Plant and the Indoor Effects of Outdoor Industrial Emissions

Rogula-Kopiec

Rogula–Kozłowska

Kozielska³

et al. 2015

Pol. J. Environ. Stud.

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“…However, some such residues are poor in adsorption ca-pacities and therefore were modified for the improvement. Numerous chemicals have been used for the modifications, including mineral and organic acids, bases, oxidants, and organic compounds (Gong et al 2008;Janoš et al 2009;Nasuha and Hameed 2011;Rafatullah et al 2010). Physical methods are generally very simple and inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Methylene Blue from Aqueous Solution Using Xanthoceras sorbifolia Seed Coat Pretreated by Steam Explosion

Yao¹,

Qi²

2016

Journal of Forest and Environmental Science

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Xanthoceras sorbifolia seed coat (XSSC) is a processing residue of the bioenergy crop. This work aimed to evaluate the applicability of using the steam explosion to modify the residue for dye biosorption from aqueous solutions by using methylene blue as a model cationic dye. Equilibrium, kinetic and thermodynamic parameters for the biosorption of methylene blue on the steam-exploded XSSC (SE-XSSC) were evaluated. The kinetic data followed the pseudo-second-order model, and the rate-limiting step was the chemical adsorption. Intraparticle diffusion was one of the rate-controlling factors. The equilibrium data agreed well with the Langmuir isotherm, and the biosorption was favorable. The steam-explosion pretreatment strongly affected the biosorption in some respects. It reduced the adsorption rate constant and the initial sorption rate of the pseudo-second-order model. It enhanced the adsorption capacity of methylene blue at higher temperatures while reduced the capacity at lower ones. It changed the biosorption from an exothermic process driven by both the enthalpy and the entropy to an endothermic one driven by entropy only. It increased the surface area and decreased the pH point of zero charge of the biomass. Compared with the native XSSC, SE-XSSC is preferable to MB biosorption from warmer dye effluents.

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“…This model can describe both the Langmuir and Freundlich adsorption behaviors, which are usually better adjusted in adsorbents of heterogeneous surface (Janoš et al, 2009). …”

Section: Adsorption Equilibriummentioning

confidence: 99%

Extraction of hydrocolloids from Pereskia Aculeata Miller: reuse of process residue as activated carbon for the pigment-removal phase

et al. 2018

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Hydrocolloids of Pereskia aculeata Miller (DPNH) are potential ingredients in food industry as emulsifiers and stabilizers. The extraction process of DPNH requires the removal of pigments with activated carbon. Because this step is critical to the quality of the ingredient and has an impact on costs, a new activated carbon has been developed with residues from the same process. Residues activated with NaDH and H 3 PD 4 (300 °C, 1 h) were subjected to batch adsorption tests in model solutions of malachite green (MG), carbohydrate and protein. Residue treated with 85% H 3 PD 4 (DPNAC) had higher productivity and MG adsorption capacity, displaying a predominantly microporous surface (MEV/BET) with chemical activation confirmed by TG/FTOR. DPNAC showed higher MG and protein adsorption capacity than the commercial activated carbon (CAC) did. Results for MG-adsorption capacity by DPNAC did not show significant differences in the presence of protein and carbohydrate, presenting the higher affinity of the adsorbent for the dye. Adsorption isotherms showed DPNAC to be more favorable to MG adsorption than CAC, and to have a good fit to Langmuir-Freundlich model. DPNAC made it possible to reduce costs and allowed the sustainability of the process, leading to increased efficiency in selective pigment removal compared with CAC.Keywords: adsorption; carbohydrate; malachite green; protein; sustainable process.Practical Application: The activated carbon obtained using solid residues of the extraction process of hydrocolloids from Pereskia aculeata Miller proved to be more effective in protein and pigment adsorptions and less effective in carbohydrate adsorption when compared to using a commercial activated carbon. The potential use is waste treatment systems and clarification process.

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Removal of basic (Methylene Blue) and acid (Egacid Orange) dyes from waters by sorption on chemically treated wood shavings

Cited by 117 publications

References 10 publications

PAH Concentrations Inside a Wood Processing Plant and the Indoor Effects of Outdoor Industrial Emissions

PAH Concentrations Inside a Wood Processing Plant and the Indoor Effects of Outdoor Industrial Emissions

Biosorption of Methylene Blue from Aqueous Solution Using Xanthoceras sorbifolia Seed Coat Pretreated by Steam Explosion

Extraction of hydrocolloids from Pereskia Aculeata Miller: reuse of process residue as activated carbon for the pigment-removal phase

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