Simultaneous removal of perchlorate and arsenate by ion-exchange media modified with nanostructured iron (hydr)oxide

Hristovski, Kiril; Westerhoff, Paul; Möller, Teresia; Sylvester, Paul J.; Condit, Wendy; Mash, Heath

doi:10.1016/j.jhazmat.2007.07.016

Cited by 70 publications

(29 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The relationship between adsorbed ion concentration and its concentration in the solution at equilibrium is described by isotherm models, and the Langmuir, Fraundlich, and LangmuirFreundlich (Sips) are the most widely referred models [8,22,[29][30][31]. The calculated constants for these three models are reported in Table 4.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis, performance, and modeling of immobilized nano-sized magnetite layer for phosphate removal

Zach-Maor¹,

Semiat²,

Shemer³

2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Adsorption Isothermsmentioning

confidence: 99%

Synthesis, performance, and modeling of immobilized nano-sized magnetite layer for phosphate removal

Zach-Maor¹,

Semiat²,

Shemer³

2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…The analysis of arsenic concentration was conducted using Varian Spectra 50B-GTA 110 Graphite Furnace Atomic Absorption Spectrometer. Parameters in Table 2 describe the water chemistry of NSF 53 Challenge water [35]. The Rapid Small-Scale Column Tests (RSSCT) were employed to mimic a scaled up packed bed reactor [33].…”

Section: Assessment Of Arsenic Leaching Potential Of Spent Adsorbent mentioning

confidence: 99%

Iron oxide-modified nanoporous geopolymers for arsenic removal from ground water

Medpelli

Sandoval

Sherrill

et al. 2015

Resource-Efficient Technologies

Self Cite

View full text Add to dashboard Cite

Composite materials of hierarchically porous geopolymer and amorphous hydrous ferric oxide were produced and characterized as a new potentially cost-effective arsenic adsorbent. The arsenic removal capabilities of the iron (hydr)oxide (HFO) media were carried out using batch reactor experiments and laboratory scale continuous flow experiments. The Rapid Small-Scale Column Tests (RSSCT) were employed to mimic a scaled up packed bed reactor and the toxicity characteristic leaching procedure (TCLP) test of arsenic adsorbed solid material was carried out to investigate the mechanical robustness of the adsorbent. The best performing media which contained~20 wt% Fe could remove over 95 µg of arsenic per gram of dry media from arsenic only water matric. The role of the high porosity in arsenic adsorption characteristics was further quantified in conjunction with accessibility of the adsorption sites. The new hierarchically porous geopolymer-based composites were shown to be a good candidate for cost-effective removal of arsenic from contaminated water under realistic conditions owing to their favorable adsorption capacity and very low leachability.

show abstract

“…So the world faces major threat to community health from the water supplies with contamination, which has been a clear common view, and stimulated many studies to develop new technologies for water purification. These new developed technologies for treating aqueous arsenic include coagulation, ion exchange, oxidation, membrane separation, and adsorption [16][17][18][19][20]. Among these technologies, adsorption has been widely studied because it is easy to operate and cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Removal of As(III) and As(V) from Water Using Magnetic Core-Shell Nanomaterial Fe3O4@Polyaniline

Zhou¹

2018

Int. J. Green Technol.

View full text Add to dashboard Cite

Arsenic pollution is an important hot topic in environmental field, and it is of great value to develop new methods for removal of arsenic pollution. Present study reported a magnetic core-shell material, polyaniline coated Fe3O4 (Fe3O4@PANI) synthesized using a simple two-step polymerization method, which was characterized by transmission electron microscopy(TEM), scanning electron microscope(SEM), FT-IR, X-ray diffraction(XRD), and a vibrating sample magnetometer(VSM) to confirm microstructure and morphology of the hybrid materials. As(III) and As(V) were used as the model analytes and the various parameters such as pH, adsorbent dosage, contact time, coexisting ions and humic acid were investigated. Under optimal conditions, the adsorption of arsenic followed pseudosecond-order kinetics, and the adsorption isotherms conformed to Freundlich adsorption isotherm model. The adsorption capacity (qmax) of Fe3O4@PANI for arsenite and arsenate in terms of monolayer adsorption were 1.066 and 1.385 mg/g, respectively. The adsorption was spontaneous and exothermic process. These results indicated that present study provided a rapid, easy to separate, and low cost method for the removal of As(III) and As(V), and would have great prospect in the removal and remediation of pollutants.

show abstract

Simultaneous removal of perchlorate and arsenate by ion-exchange media modified with nanostructured iron (hydr)oxide

Cited by 70 publications

References 36 publications

Synthesis, performance, and modeling of immobilized nano-sized magnetite layer for phosphate removal

Synthesis, performance, and modeling of immobilized nano-sized magnetite layer for phosphate removal

Iron oxide-modified nanoporous geopolymers for arsenic removal from ground water

Removal of As(III) and As(V) from Water Using Magnetic Core-Shell Nanomaterial Fe3O4@Polyaniline

Contact Info

Product

Resources

About