Micellar-enhanced ultrafiltration of zinc in synthetic wastewater using spiral-wound membrane

Rahmanian, Bashir; Pakizeh, Majid; Maskooki, Abdolmajid

doi:10.1016/j.jhazmat.2010.08.031

Cited by 45 publications

(19 citation statements)

References 21 publications

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“…It contains several kinds of enzymes, such as cellulase, amylase, lipase and hydrolase with the bulk density of 0.6-0.8 g/cm 3 .…”

Section: Micro-organism and Its Culture Conditionsmentioning

confidence: 99%

“…Heavy metals, such as lead and zinc, are difficult to biodegrade and can travel through the food chain by bioaccumulation, which will result in serious environmental pollution if it is discharged without effective treatment. In the last decades, various physicochemical methods, such as filtration [1][2][3], chemical precipitation [4], solvent extraction [5], ion exchange [6] and adsorption [7], have been investigated for removing heavy metals from wastewaters. However, these methods have the disadvantages of low efficiencies and high cost [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Biosorption of Pb(II) and Zn(II) from aqueous solutions by living B350 biomass

Qu¹,

Meng

Zhao

et al. 2014

Desalination and Water Treatment

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A B S T R A C TBeneficiation production wastewater is a kind of wastewater generated from exploiting minerals, where the main pollutants are heavy metals and organic agents. In this study, living B350 biomass (a mixture of various micro-organisms) was used to remove Pb(II) and Zn(II) from aqueous solutions. The effects of pH, biomass dosage and contact time on removal ratios of Pb(II) and Zn(II) were studied. Two kinetic models, pseudo-first-order and pseudo-secondorder, were used to fit the experimental results. The chemical changes of B350 biomass before and after adsorption were monitored by Energy Dispersion X-ray (EDX) spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy. In addition, the feasibility of B350 to remove heavy metals and m-cresol simultaneously was investigated. The results showed that the removal ratios of heavy metals increased with increasing dosage of biosorbent. When B350 dosage was 1.0 g/L, 84.88% of Pb(II) and 38.06% of Zn(II) can be removed after 2 h of adsorption at 25˚C. The adsorption of Pb(II) and Zn(II) on B350 was coincident with Langmuir and Freundlich isotherms, respectively. Pseudo-second-order model can best describe the adsorption process. EDX and FTIR results indicated that ion exchange and complexation might exist during the adsorption of Pb(II) and Zn(II). The living B350 biomass can not only adsorb heavy metal ions, but also biodegrade organic pollutants through metabolizing itself.

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“…It contains several kinds of enzymes, such as cellulase, amylase, lipase and hydrolase with the bulk density of 0.6-0.8 g/cm 3 .…”

Section: Micro-organism and Its Culture Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biosorption of Pb(II) and Zn(II) from aqueous solutions by living B350 biomass

Qu¹,

Meng

Zhao

et al. 2014

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…Theoretically, there are no micelles formed at surfactant concentrations below the CMC and therefore, there is not any metal ion rejection, but according to our results, the Pb 2+ rejection was observed when the SDS concentrations are below the CMC. This behavior can be demonstrated due to the concentration polarization effect which hinders the ions permeation through the membrane pores [17].…”

Section: Effect Of Process Variables On Rejection Rate and Permeationmentioning

confidence: 99%

“…Permeability of these membranes is low and thus, to get the desired throughput, a high operating pressure is required [14]. Recently, a modified ultrafiltration membrane separation process 'micellar-enhanced ultrafiltration (MEUF)' has been used for the removal of various organic and/or inorganic pollutants from aqueous phase [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Fuzzy modeling and simulation for lead removal using micellar-enhanced ultrafiltration (MEUF)

Rahmanian

Pakizeh

Esfandyari

et al. 2011

Journal of Hazardous Materials

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“…Moderate concentration polarization was observed with a relative flux of 0.8, when using the smallest pore size membrane. Rahmanian (Rahmanian et al 2010) removed zinc from synthetic solutions, using spiral-wound ultrafiltration membrane. The effects of different operating conditions on membrane separation performance were investigated.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

Tortora

Innocenzi

Prisciandaro

et al. 2016

Water Air Soil Pollut

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Wastewaters from civil and industrial use, which contain high concentration of heavy metals, pose the problem for their correct disposal. They cannot be directly discharged in sewage systems, as metal ions represent a serious problem not only for human health but also for the environment. In this paper, the removal of nickel, cobalt, chromium, and zinc ions from synthetic liquid wastes was carried out, by using a micellarenhanced ultrafiltration (MEUF) process; an ultrafiltration (UF) membrane (a monotubular ceramic of molecular weight cutoff 210 kDa) together with sodium dodecyl sulfate (SDS) as an anionic surfactant was used, in a lab-scale experimental device. The synthetic liquid contained 10-mg/L metal ions (Cr, Zn, Co, Ni), while SDS concentration varied from values above and below critical micellar concentration (CMC). The experiments were carried out at room temperature (25°C). Results achieved showed that SDS was able to bind metal ions, resulting in a strong increase of rejection coefficient, which reached highest values in case of SDS concentration below CMC, unexpectedly.

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Micellar-enhanced ultrafiltration of zinc in synthetic wastewater using spiral-wound membrane

Cited by 45 publications

References 21 publications

Biosorption of Pb(II) and Zn(II) from aqueous solutions by living B350 biomass

Biosorption of Pb(II) and Zn(II) from aqueous solutions by living B350 biomass

Fuzzy modeling and simulation for lead removal using micellar-enhanced ultrafiltration (MEUF)

Heavy Metal Removal from Liquid Wastes by Using Micellar-Enhanced Ultrafiltration

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