Treatment of concentrated arsenic(V) solutions by micellar enhanced ultrafiltration with high molecular weight cut-off membrane

Beolchini, Francesca; Pagnanelli, Francesca; Michelis, Ida De; Vegliò, Francesco

doi:10.1016/j.jhazmat.2007.02.031

Cited by 40 publications

(18 citation statements)

References 22 publications

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“…The effect of NMWL and pressure in retention of surfactant and heavy metals can be explained due to concentration polarisation. The gel formation due to concentration polarisation can contribute to a presieving effect increasing the retention of surfactant and heavy metals [11,28]. As explained in Section 3.1, in this study the concentration polarisation phenomenon was negligible.…”

Section: Empirical Models For Heavy Metal Retentionmentioning

confidence: 62%

Micellar-enhanced ultrafiltration for the removal of cadmium and zinc: Use of response surface methodology to improve understanding of process performance and optimisation

Landaburu-Aguirre

Pongrácz

Perämäki

et al. 2010

Journal of Hazardous Materials

121

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Section: Empirical Models For Heavy Metal Retentionmentioning

confidence: 62%

Micellar-enhanced ultrafiltration for the removal of cadmium and zinc: Use of response surface methodology to improve understanding of process performance and optimisation

Landaburu-Aguirre

Pongrácz

Perämäki

et al. 2010

Journal of Hazardous Materials

121

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“…As seen in Table 4, SDS removal percentage decreased with an increase in MWCO of UF membrane. This can be corroborated as larger pore-sized membranes caused earlier development of concentration polarization (CP) and reduced the release of surfactant in the permeate [19].…”

Section: -7 Removal Of Cadmium By Meuf Without Sdsmentioning

confidence: 85%

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Rafique¹,

Lee²

2014

Korean Chemical Engineering Research

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− Micellar enhanced ultrafiltration (MEUF) was used to remove cadmium from an aqueous solution using sodium dodecyl sulfate (SDS) as a surfactant. Operational parameters such as initial permeate flux, retentate pressure, initial cadmium concentration, pH solution, molecular weight cut-off (MWCO), and molar ratio of cadmium to SDS were investigated. Removal efficiency of cadmium from an aqueous solution increased with an increase of retentate pressure, pH solution and molar ratio of cadmium to SDS, and decreased with an increase of initial permeate flux. Higher removal efficiency of cadmium from the aqueous solution was achieved using lower MWCO (smaller membrane pore size). Under optimized experimental condition, cadmium removal efficiency reached 74.6 % within an hour. Using MEUF-ACF hybrid process the removal efficiency of both cadmium and SDS was found to be over 90%.

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“…Pal et al (2007b) have demonstrated that the physico-chemical treatment of contaminated water on a large scale could be a viable option particularly in far-flung arsenic-affected areas where alternate sources of water supply are limited. In recent years, several membrane-based purification studies (Beolchini et al 2007;Hsieh et al 2008;Lin et al 2008;Pagana et al 2008;Fogarassy et al 2009;Geucke et al 2009;Nguyen et al 2009;Qu et al 2009) have been reported.…”

Section: Available Purification Optionsmentioning

confidence: 99%

“…However, the technique is still short of target reduction down to 10 mg/l. Studies on hybrid processes combining microfiltration and ultrafiltration with chemical precipitation or adsorption have been reported (Beolchini et al 2007;Lin et al 2008;Pagana et al 2008). Pagana et al (2008) combined adsorption with ultrafiltration in removing arsenic as well as chromium from water and brought down arsenic concentration from 1 ppm to 10 mg/l using Fe 2 O 3 adsorbent nanoparticles.…”

Section: Membrane-based Processes For Purification Of Arsenic-contamimentioning

confidence: 99%

“…Amy (1998, 2001) studied ultrafiltration of river water after spiking the same with 15-30 mg/l arsenic (III) and arsenic (V) and achieved only a 47.2% rejection of arsenic against a 95% rejection by RO and NF membranes. Beolchini et al (2007) used a high molecular weight cut-off (MWCO 100 kDa) PES ultrafiltration membrane to reduce the volume of highly concentrated arsenic-bearing wastewater (6-10 mg/l) and they achieved 93-98% As(V) removal but As(III) removal was only 70-74%. Combination of a high MWCO ultrafiltration membrane and a low surfactant concentration was claimed to lead to low membrane surface requirement and better economies.…”

Section: Membrane-based Processes For Purification Of Arsenic-contamimentioning

confidence: 99%

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Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

Pal¹,

Sen²,

Manna³

et al. 2009

Journal of Integrative Environmental Sciences

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The contamination of groundwater by leached out arsenic has assumed an alarming proportion in several countries. Continued and prolonged ingestion even at a very low level can lead to serious arsenic-related diseases. Strong epidemiological evidence of arsenic carcinogenicity has forced the World Health Organization (WHO) to lower the maximum permissible contaminant limit (MCL) in drinking water to 10 ppb from earlier limit of 50 ppb. This has thrown a big challenge to the scientific community to devise efficient methods to purify contaminated water to such a high level. Though literature abounds in occurrence of groundwater contamination by arsenic and its removal from drinking water by laboratory techniques, millions of people continue to suffer, particularly in the developing countries like India (Bangladesh, West Bengal). Through a comprehensive review of the existing literature on the occurrence, causes, impacts and remedial measures, this article finds out what has gone wrong and what is to be done with special emphasis on membrane-based separation that seems to be highly promising in purifying arsenic-contaminated groundwater to a WHOprescribed level.

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Treatment of concentrated arsenic(V) solutions by micellar enhanced ultrafiltration with high molecular weight cut-off membrane

Cited by 40 publications

References 22 publications

Micellar-enhanced ultrafiltration for the removal of cadmium and zinc: Use of response surface methodology to improve understanding of process performance and optimisation

Micellar-enhanced ultrafiltration for the removal of cadmium and zinc: Use of response surface methodology to improve understanding of process performance and optimisation

Micellar Enhanced Ultrafiltration (MEUF) and Activated Carbon Fiber (ACF) Hybrid Processes for the Removal of Cadmium from an Aqueous Solution

Contamination of groundwater by arsenic: a review of occurrence, causes, impacts, remedies and membrane-based purification

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