Adsorption of basic dyes in a fixed bed column

Markovska, Liljana; Meshko, Vera; Noveski, Vladimir

doi:10.1007/bf02698458

Cited by 57 publications

(29 citation statements)

References 15 publications

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“…The column was fed with diluted cleaning wastewater from the bottom up to the top with a constant flow rate of 6 mL/ min (equivalent to 0.11 cm/ s) and initial COD concentration was 5 000 mg/ L. The results in Figure 3 showed that the breakthrough curves of COD removal by WAC were followed the typical "S-shaped" curves which indicated that sorbent was effective for removing COD from the studied wastewater. Similar breakthrough curves have been reported on adsorption of textile wastewater by GAC Filtrasorb 400 [2] and adsorption of basic dyes on to natural zeolite [7].…”

Section: Effect Of Bed Height On Breakthrough Curvessupporting

confidence: 84%

“…As it can be observed in Figure 3, the treated wastewater volumes (corresponding to C t / C 0 = 0.3) were found to be 5.9, 12.4 and 19 L and the service time were 19.7, 39.0 and 63.3 h with 19, 38 and 57 cm of bed height, respectively. The effect of the bed height on the service time during column studies has been reported by other researchers [7][8][9]. In deeper bed columns, the higher amount of activated carbons and consequently, higher amount of available sorptive sites are responsible for longer period needed to achieve the complete exhaustion of the sorbent material.…”

Section: Figure 3 Breakthrough Curves Of Cod Sorption In Wood-based Amentioning

confidence: 68%

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Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

Hogland¹,

Marques²,

Laohaprapanon³

et al. 2017

Eco-Tech

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In the present study, organic removal from five industrial cleaning wastewaters generated at a wood-laminate floor industry in Sweden was evaluated using a combined treatment process including sedimentation and a packed-bed column of commercial wood-based activated carbon (WAC). The supernatant obtained from the sedimentation was diluted with tap water until the COD concentration was reached 5 000 mg/L and it was continuously fed through the column by up-flow mode at a constant flow rate of 6 mL/min. The WAC performance at different bed height of 19, 38 and 57 cm was studied. The results showed that the sedimentation process removed about 20%, 24% and 24% of COD, TOC and BOD, respectively and the WAC column was effective in removing COD from the water phase. The treated wastewater volume and service time increased with the bed height increase. The column could treat 19 L of wastewater with the service time of 63.3 h and 30% breakthrough point. The experimental data fitted well with the bed depth-service time (BDTS) model. The increase of wastewater load on solid phase from 20%, 30%, 40% and 50% showed an increase of sorption capacity (N o ) and decrease of the rate constant (k).

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Section: Effect Of Bed Height On Breakthrough Curvessupporting

confidence: 84%

Section: Figure 3 Breakthrough Curves Of Cod Sorption In Wood-based Amentioning

confidence: 68%

Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

Hogland¹,

Marques²,

Laohaprapanon³

et al. 2017

Eco-Tech

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“…It has also been reported that many dyes and pigments have toxic as well as carcinogenic, mutagenic, and tetratogenic effects on aquatic life as well as humans [2,3]. The removal of dyes and organics in an economic fashion remains an important problem, although a number of successive systems have been developed with the adsorption technique [4]. Adsorption has been found to be superior to most other wastewater treatment techniques in terms of initial cost, simplicity of design, ease of operation, and insensitivity to toxic substances [5].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Ogunmodede

Adebayo²,

Ojo

2014

ILCPA

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Natural clay has been considered as a potential absorbent for removing pollutants from water and waste water. Nonetheless, the effective application of clay for water treatment is limited due to small surface area and presence of net negative surface charge, leading to it low adsorption capacity. The absorption capacity was boosted via intercalation of CaO derived from snail shell (SS). The methylene blue sorption potential, PZC, and the surface area of unmodified clay sample were substantially enhanced by the intercalation process. The process of sorption of MB from solution was analyzed using five different isotherm models (Langmuir, Freundlich, Temkin, Harkins-Jura, and Halsey isotherm equations). The value of the Langmuir monolayer sorption capacity qm (mg/g) increased from 50.12 to 88.71, PZC values increased from 4.50 to 7.40, and the surface area (m 2 /g) value increased from 27 m 2 /g to 123 m 2 /g after the intercalation process. The experimental data were fitted into two kinetic models: Lagergren pseudo-first order and the chemisorptions pseudo-second order. It was observed that chemisorptions pseudo-second order kinetic model described the sorption process with high coefficients of determination (r2) better than pseudo first other kinetic models. The modification caused no change in the clay surficial microstructure but increased the lattice spacing of the clay framework.

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“…The effect of pH on the green malachite adsorption by LSN was investigated in the pH of 4, 6, and 8. Figure 2 shows the malachite green adsorption percentage as a function of pH and contact q and in the liquid phase, C at constant temperature [22,[29][30][31]. Adsorption isotherms are described in many mathematical forms.…”

Section: Effect Of Phmentioning

confidence: 99%

Loess Soil Nanoparticles as A Novel Adsorbent for Adsorption of Green Malachite Dye

Mr¹,

Aslani²,

F³

2017

J Chromatogr Sep Tech

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Adsorption of basic dyes in a fixed bed column

Cited by 57 publications

References 15 publications

Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

Removal of Organic Pollutants from Industrial Cleaning Wastewaters Using a Combined Sedimentation and Packed-bed Column Treatment

Enhancing Adsorption Capacity of Clay and Application in Dye Removal from Waste Water

Loess Soil Nanoparticles as A Novel Adsorbent for Adsorption of Green Malachite Dye

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