Removal of arsenic from groundwater by micellar-enhanced ultrafiltration (MEUF)

Iqbal, Javed; Kim, Hojeong; Yang, Jung‐Seok; Baek, Kitae; Yang, Ji‐Won

doi:10.1016/j.chemosphere.2006.06.005

Cited by 132 publications

(45 citation statements)

References 22 publications

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“…The particle size and zeta potential of 0.02% BAC were not detectable, as 0.02% BAC was much lower than the required 5 mM (approximately 0.2%) critical micelle concentration (CMC). 38 On the other hand, measurement of 1% HCO-40 found there was a 25.7-nm mean particle size that had a slightly negative surface charge. Furthermore, the addition of 0.02% BAC, which had a cationic charge, induced a reduction of the particle size and modified the surface charge from is strong hydrophobic and ionic bonding that reduces the particle size.…”

Section: Discussionmentioning

confidence: 99%

Polyoxyethylene Hydrogenated Castor Oil Modulates Benzalkonium Chloride Toxicity: Comparison of Acute Corneal Barrier Dysfunction Induced by Travoprost Z and Travoprost

Uematsu

Kumagami

Shimoda

et al. 2011

Journal of Ocular Pharmacology and Therapeutics

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Methods: Corneal transepithelial electrical resistance (TER) was measured in live white Japanese rabbits by two Ag/AgCl electrodes placed in the anterior aqueous chamber and on the cornea. We evaluated corneal TER changes after a 60-s exposure to travoprost Z, travoprost, and 0.015% BAC.Similarly, TER changes were evaluated after corneas were exposed for 60 s to the travoprost additives EDTA, boric acid, mannitol, trometamol, and polyoxyethylene hydrogenated castor oil 40 (HCO-40) with or without BAC. Corneal damage was examined after exposure to BAC with or without travoprost additives using scanning electron microscopy (SEM) and a cytotoxicity assay.Results: Although no decreases of TER were noted after exposure to travoprost Z with sofZia and travoprost with 0.015% BAC, a significant decrease of corneal TER was observed after 0.015% BAC exposure. With the exception of for BAC, no corneal TER decreases were observed for any travoprost additives. After corneal exposure to travoprost additives with BAC, HCO-40 was able to prevent the BAC-induced TER decrease. SEM observations and the cytotoxicity assay confirmed that there was a remarkable improvement of BAC-induced corneal epithelial toxicity after addition of HCO-40 to the BAC.

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Section: Discussionmentioning

confidence: 99%

Polyoxyethylene Hydrogenated Castor Oil Modulates Benzalkonium Chloride Toxicity: Comparison of Acute Corneal Barrier Dysfunction Induced by Travoprost Z and Travoprost

Uematsu

Kumagami

Shimoda

et al. 2011

Journal of Ocular Pharmacology and Therapeutics

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“…Potable water suppliers have an increased need for arsenic removal processes suitable for treating water sources with low ambient arsenic concentrations (10-50 mg/L). Arsenic in water can be effectively removed by using a variety of conventional treatment processes, including reverse osmosis [4], coagulation/ chemical precipitation [5,6], solvent extraction [7], ultrafiltration [8,9], ion-exchange [10] and adsorption [11]. Adsorption method is a conventional technique that can be used effectively for the removal of heavy metals by using different adsorbents [12].…”

mentioning

confidence: 99%

Synthesised magnetic nanoparticles coated zeolite (MNCZ) for the removal of arsenic (As) from aqueous solution

Salem

Yin

2012

Journal of Experimental Nanoscience

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A novel adsorbent, magnetic nanoparticle (-Fe 2 O 3 )-coated zeolite (MNCZ), was prepared for the removal of arsenic (As) ions from aqueous solution. The influence of different sorption parameters, that is, contact time, acidic reaction (pH) and initial arsenic concentration were studied using batch equilibrium techniques. The results obtained showed that the MNCZ was effective for the removal of As from aqueous solution, and the percentage removal of As could reach over 95.6% at a pH value of 2.5 within 15 min. Moreover, the removal of As depended on the initial concentration of As. For the regeneration of MNCZ material, 0.1 M NaOH was suitable for the desorption of As (70% after 15 min), and the regenerated material showed an adsorption capacity of 93.95% within five cycles. We concluded that MNCZ presents a reusable adsorbent for a fast, convenient and highly efficient removal of As from aqueous solution.

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“…Since the beginning of the 1980s, micellarenhanced ultrafiltration (MEUF) has become very attractive for separation of diluted aqueous solutions (Fang et al 2008;Bielska and Szymanowski 2006;Krivorot et al 2006;Akita et al 1997;Juang et al 2003;Witek et al 2006;Iqbal et al 2007;Reiller et al 1996). However, the industrial application of this approach is still far away from positive finalization.…”

Section: Introductionmentioning

confidence: 99%

Colloid-enhanced ultrafiltration in removal of traces amounts of borates from water

Bryjak

Duraj

Poźniak

2010

Environ Geochem Health

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The use of colloid-enhanced ultrafiltration for boron removal from water is investigated. Biodegradable surfactant, 1,4-sorbitol oleate, was applied to obtain micelles and high molecular weight chitosan to reinforce their stability. Two kind of membranes were compared: neat porous polysulfone membrane and charged porous sulfonated polysylfone membrane; both with similar average pore diameter of 5 nm. The studies revealed that two key factors affect the boron rejection: presence of surfactant in the colloidal mixture and a repulsion effect of sulfone groups on the membrane surface. Both have a positive effect on boron removal.

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Removal of arsenic from groundwater by micellar-enhanced ultrafiltration (MEUF)

Cited by 132 publications

References 22 publications

Polyoxyethylene Hydrogenated Castor Oil Modulates Benzalkonium Chloride Toxicity: Comparison of Acute Corneal Barrier Dysfunction Induced by Travoprost Z and Travoprost

Polyoxyethylene Hydrogenated Castor Oil Modulates Benzalkonium Chloride Toxicity: Comparison of Acute Corneal Barrier Dysfunction Induced by Travoprost Z and Travoprost

Synthesised magnetic nanoparticles coated zeolite (MNCZ) for the removal of arsenic (As) from aqueous solution

Colloid-enhanced ultrafiltration in removal of traces amounts of borates from water

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