Submerged microfiltration membrane coupled with alum coagulation/powdered activated carbon adsorption for complete decolorization of reactive dyes

Lee, Jae‐Wook; Choi, Seung-Phil; Thiruvenkatachari, Ramesh; Shim, Wang Geun; Moon, Hee

doi:10.1016/j.watres.2005.11.034

Cited by 202 publications

(98 citation statements)

References 13 publications

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“…Alternatively, some authors have recognized the potential benefits of a combined coagulation and PAC adsorption process before membrane filtration [33]; however, in these cases the membrane operation process lasted for only 30 min [12], or less than 5 h [17]. Matsui et al [34] found that both physically reversible and irreversible membrane fouling were reduced by a combination of PAC and polyaluminum chloride (PACl) pretreatment, because of a high NOM removal and the formation of larger and more porous flocs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of pre-coagulation and powder activate carbon adsorption on ultrafiltration membrane fouling

et al. 2014

Journal of Membrane Science

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a b s t r a c tPre-coagulation by alum before ultrafiltration without (CUF) and with (CAUF) powdered activated carbon (PAC) addition was investigated to explore the influence of PAC on membrane fouling. It was found that the continuous addition of a low dosage of PAC reduced membrane fouling for operational run periods o20 days, both for reversible and for irreversible components of fouling. The presence of PAC increased the removal of dissolved organic matter (DOM), particularly proteinaceous substances, and some fractions of humic-type substances. For a longer operation time (420 days) an increase in mainly reversible fouling was evident and was attributed to microorganism growth in the cake layer, as indicated by the enhanced concentrations of extracellular polymeric substances, such as polysaccharides and proteins. A process of crystallization of the coagulant floc in the cake layer with increasing operation time was believed to cause desorption of DOM from primary coagulation particles and a decrease in their size, and consequently a higher density of cake layer. PAC absorption of desorbed DOM within the cake layer, and residual DOM after coagulation, reduced DOM reaching the membrane surface and the extent of subsequent internal membrane fouling.Crown

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Section: Introductionmentioning

confidence: 99%

Investigation of pre-coagulation and powder activate carbon adsorption on ultrafiltration membrane fouling

et al. 2014

Journal of Membrane Science

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“…Therefore, dye removal techniques are being intensely investigated. The various techniques for dye removal that have been reported in the literature include biological treatments, coagulation/flocculation, ozone treatments, chemical oxidation, membrane filtration, ion exchange, photocatalysis, and adsorption [3][4][5][6][7][8][9][10]. Among them, the adsorption technique for dye removal has recently attracted widespread attention [11] and it is one of the most effective methods of dye removal [12].…”

Section: Introductionmentioning

confidence: 99%

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Ogata

Tominaga

Kangawa

et al. 2011

e-J. Surf. Sci. Nanotechnol.

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In this study, methylene blue (MB), orange II (ORII), and indigo carmine (IC) were used as adsorbates. Untreated (CT) and treated cotton (CT400, CT600, CT800, and CT1000) were prepared from waste cotton, and their respective physical (i.e., specific surface area, pore volume, and mean pore diameter) and chemical properties (i.e., yield percentage, base consumption, and amount of pH solution added to the adsorbent) were investigated. Scanning electron microscope images of CT, the adsorption rate, and the adsorption isotherm were also analyzed. The specific surface area, pore volume, and mean pore diameter of CT1000 was greater than that of other CT varieties, indicating that the pores on the CT surface were generated by carbonization. Additionally, yield percentage and base consumption decreased because of carbonization. Equilibrium adsorption (i.e., MB, ORII, and IC) was reached within 12 h. The experimental data were fitted to a pseudo-second-order model, suggesting that the adsorption might be a chemisorption process, for which the correlation coefficient, R, equals 1.000. The amount of dye adsorbed onto CT1000 was as follows: IC (290 mg/g) < MB (446 mg/g) ∼ ORII (452 mg/g). These experimental data were fitted to the Freundlich equation. The present study implies that the adsorbent for dye removal can be produced from waste cotton and that it is useful for the purification of dye solution systems.

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“…Dye removal by coagulation is not based on the partial decomposition of dye compounds, thus no potentially harmful and toxic intermediates are produced. Furthermore, this process can be used in large-scale operation with relatively high operability and cost effectiveness [2,11,12]. A limitation of this technique is that some high-soluble, low molecular and cationic dyes might not be effectively removed.…”

Section: Introductionmentioning

confidence: 99%

“…PACl contains polymeric Al species formed by partially neutralization. The preformed Al species in PACl are relatively stable after dosing, and thus their effectiveness can be less influenced by the specific water quality conditions [13][14][15][16][17] 12 ] 7+ ) is considered as the most important species in PACl and has long been research interest.…”

Section: Introductionmentioning

confidence: 99%

Removal of direct dyes by coagulation: The performance of preformed polymeric aluminum species

Shi

Wang

et al. 2007

Journal of Hazardous Materials

503

172

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Removal of three direct dyes (Direct Black 19, Direct Red 28, and Direct Blue 86) by coagulation with three different Al based coagulants was investigated. The main purpose of this paper is to examine the coagulation features of polymeric aluminum coagulants in treatment of dye-polluted waters and the emphasis was placed on the roles of preformed Al species, particularly Al 13 . The performance of Al 13 in coagulation of dyes was observed through jar tests by comparing traditional Al salt, polyaluminum chloride (PACl), and purified Al 13 . The results showed that under most cases Al 13 had significantly higher efficiency in removal of direct dyes than traditional Al salt and commercial PACl with the exception of Direct Red 28 removal under high pH range. The coagulation of direct dyes could be greatly affected by pH. Reducing pH was favorable for preformed Al species in a broad pH range. For traditional Al coagulant, efficient dye removal only occurred in a relatively narrow pH range of near 6.0. The outstanding coagulation behavior of Al 13 could be ascribed to its high charge neutralization ability, relative stability and potential self-assembly tendency.

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Submerged microfiltration membrane coupled with alum coagulation/powdered activated carbon adsorption for complete decolorization of reactive dyes

Cited by 202 publications

References 13 publications

Investigation of pre-coagulation and powder activate carbon adsorption on ultrafiltration membrane fouling

Investigation of pre-coagulation and powder activate carbon adsorption on ultrafiltration membrane fouling

Properties of Carbonaceous Material Produced from Cotton and Its Dye Adsorption Capabilities

Removal of direct dyes by coagulation: The performance of preformed polymeric aluminum species

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