Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation

Georgiou, Yiannis; Dimos, Konstantinos; Beltsios, K.; Karakassides, Michael A.; Deligiannakis, Yiannis

doi:10.1016/j.cej.2015.06.118

Cited by 26 publications

(8 citation statements)

References 48 publications

(86 reference statements)

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“…For the measurements we used aliquots of 8.3 mL shifting at pH < 0.5 by 1.5 mL from 6.66 M of HCl and final 2 M concentration in the electrochemical cell [25], then 8 ppm of Cu 2+ were added. In the following, As III was determined by SW-CSV with accumulation potential E = −400 mV and accumulation time 60 s. As III was quantified by its signal at E 1/2 = −670 mV [19,20]. For the kinetic measurements, As III uptake from aqueous solutions was studied in batch experiments.…”

Section: Analytical Determination Of As IIImentioning

confidence: 99%

“…To test the recyclability of the gC 3 N 4 -rFe material we have used the methodology described earlier in reference [20] for Fe-particles supported on polysulfone membranes. Reusing the gC 3 N 4 -rFe requires to desorb the adsorbed As III .…”

Section: Reusability Of Gc 3 N 4 -Rfementioning

confidence: 99%

“…The maximal As III -uptake is usually determined by: [i] the concentration of the surface-available As III binding sites, and [ii] the binding-constant of the As III atoms on the surface-sites. A particular property of As III atoms' binding on chargeable surfaces is that its binding constant is optimal for neutral metal-oxide surface sites [16,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Surface decoration of amine-rich carbon nitride with iron nanoparticles for arsenite (AsIII) uptake: The evolution of the Fe-phases under ambient conditions

Georgiou

Mouzourakis

Bourlinos

et al. 2016

Journal of Hazardous Materials

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Section: Analytical Determination Of As IIImentioning

confidence: 99%

Section: Reusability Of Gc 3 N 4 -Rfementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface decoration of amine-rich carbon nitride with iron nanoparticles for arsenite (AsIII) uptake: The evolution of the Fe-phases under ambient conditions

Georgiou

Mouzourakis

Bourlinos

et al. 2016

Journal of Hazardous Materials

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“…Finally, we have evaluated the possibility of reusing the ZrMOF and ZrMOF@SF d materials after regeneration. Thus, we have applied the regeneration protocol 24,70 , which involved high ionic-strength treatment. More particularly, the protocol involves incubation for 24 hours under stirring at a pure aqueous solution containing 1 M of KNO 3 .…”

Section: ( ) [Ii]mentioning

confidence: 99%

A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Georgiou

Rapti

Mavrogiorgou

et al. 2020

Sci Rep

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Exposure of humans to Arsenic from groundwater drinking sources is an acute global public health problem, entailing the urgent need for highly efficient/low-cost Arsenite (As iii) up-taking materials. Herein we present an innovative hybrid-material, ZrMOF@SF d operating like an "As iii-sponge" with unprecedented efficiency of 1800 mg As iii gr −1. ZrMof@SF d consists of a neutral Zirconium Metal-Organic Framework [ZrMOF] covalently grafted on a natural silk-fiber (SF d). ZrMOF itself exhibits As iii adsorption of 2200 mg gr −1 , which supersedes any-so far-known As ΙΙΙ-sorbent. Using XPS, FTIR, BETporosimetry data, together with theoretical Surface-Complexation-Modeling (SCM), we show that the high-As ΙΙΙ-uptake is due to a sequence of two phenomena:[i] at low As iii-concentrations, surfacecomplexation of H 3 Aso 3 results in As iii-coated voids of ZrMOF, [ii] at increased As iii-concentrations, the As iii-coated voids of ZrMOF are filled-up by H 3 Aso 3 via a partitioning-like mechanism. in a more general context, the present research exemplifies a mind-changing concept, i.e. that a "partitioning-like" mechanism can be operating for adsorption of metalloids, such as H 3 Aso 3, by metal oxide materials. So far, such a mechanism has been conceptualized only for the uptake of non-polar organics by natural organic matter or synthetic polymers. Arsenic exposure through drinking water sourced from groundwater, is a global public health problem that is particularly devastating in certain highly populated countries 1,2. According to a 2000 to 2010 case study, 35 to 77 million people in areas of Bangladesh or India have been chronically exposed to arsenic in their drinking water in what described as the most significant mass poisoning in history 3. Arsenic is a naturally occurring metalloid, also released to the environment via anthropogenic activities. Arsenic strongly binds to proteins, so traces of this element can cause severe health problems to all life forms 4. The predominant forms of arsenic in the aquatic environment are As III (arsenite) and As V (arsenate). As III is more hazardous than As V , as it is more mobile/bioavailable, thus more toxic 5. This toxicity is due to its dominant H 3 AsO 3 form, i.e. the predominating species in a wide range of pH < 9 6 , typically encountered in natural waters. So far, traditional ion-exchange materials and sorbents, e.g. zeolites, clays, layered double hydroxides, resins have been used as arsenic adsorbends, however, with limited efficiency vs. As III 7,8. Given that As V , which exists as anion at pH > 2, is easier to adsorb on cationic surfaces, to overcome the low efficiency of As III uptake, an extra step of oxidation of As III to As V can be chosen before the application of various remediation technologies. Such oxidative pretreatment, however, suffers from the presence of multiple substances that interfere with As III oxidation 9,10. Therefore, it will be desirable to develop sorbents that could directly capture As III in natural pH conditions, without the need for ...

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“…In fact, there are reported studies on the use of ferric oxide on PSf membranes. A recent study by Georgiou et.al (2015) showed that a nanocomposite membrane of PSf/zero valent iron (ZVI) illustrated a significant enhancement of mechanical robustness whereas a study by Greenlee (2015) successfully demonstrated that the PSf/ZVI may also function as a hybrid adsorbent for the remediation of arsenic (III) (Georgiou et al, 2015;Greenlee, 2015). In addition, a study by Chen et.al.…”

Section: Introductionmentioning

confidence: 99%

Characterizations of Polysulfone/Ferrihydrite Mixed Matrix Membranes for Water/Wastewater Treatment

Abdullah

Yusof²,

Gohari

et al. 2018

Water Environment Research

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This study aimed to investigate the effects of ferrihydrite (Fh) nanoparticle loading on the physicochemical properties of polysulfone (PSf) membranes fabricated via the phase inversion method. The morphologies and physicochemical properties of prepared Fh and PSf/Fh mixed matrix membranes (MMMs) were characterized using transmission electron microscopy (TEM), X-ray diffraction analysis (XRD), Fourier transmission infra-red (FTIR), scanning electron microscopy (SEM), atomic force microscopy (AFM), pure water flux analysis, contact angle measurement, and membrane porosity analysis. FTIR study indicated that a new O-H band was formed when Fh was added into the membrane matrix. SEM analysis showed the formation of typical asymmetric membrane structures with elongated fingerlike and looser porous layers. Increasing the loading of Fh significantly enhanced membrane pure water flux from 230.2 L/m2•h (M-Fh 0%) to 726.6 L/m2•h (M-Fh 15.3%), attributed to the improved membranes structures, membranes wettability, surface roughness, and overall porosity. The findings suggest incorporation of Fh into PSf membranes improves physicochemical properties of the membranes which are applicable for water/wastewater treatment.

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Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation

Cited by 26 publications

References 48 publications

Surface decoration of amine-rich carbon nitride with iron nanoparticles for arsenite (AsIII) uptake: The evolution of the Fe-phases under ambient conditions

Surface decoration of amine-rich carbon nitride with iron nanoparticles for arsenite (AsIII) uptake: The evolution of the Fe-phases under ambient conditions

A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Characterizations of Polysulfone/Ferrihydrite Mixed Matrix Membranes for Water/Wastewater Treatment

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