The implication of iron oxide nanoparticles on the removal of trichloroethylene by adsorption

Salih, Hafiz; Patterson, Craig; Sorial, George A.; Sinha, Rajib; Krishnan, Rajesh

doi:10.1016/j.cej.2012.03.040

Cited by 17 publications

(11 citation statements)

References 44 publications

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“…The same study reported that the change in carbon particle size due to grinding did not result in any substantial change in internal pore size distribution, and therefore the dependency of the NOM adsorption capacity was not related to the internal pore structure. A similar observation was also obtained by Hu et al (2015) and Salih et al (2012) confirming that the structural features of the carbon internal pores are unlikely to be altered by grinding. The hydrodynamic size of the hydrophobic nC60 used in this experiment was measured as 146 nm , which makes it improbable that adsorption in the internal pore structure (micro and meso pores) of the AC occurred.…”

Section: Column Studysupporting

confidence: 84%

“…However, only a small change (4%) in the BET surface area was observed. The AC was found to have a neutral surface with a negligible charge of +0.16 mV (Salih et al, 2012) around pH 8 (pH of the surface water used in this study), which indicates negligible electrostatic interactions between F400 and nC60. Conversely the charge of the AC surface increases to +20 mV (Salih et al, 2011) in the pH range of ultrapure water (pH 5.5) promoting nC60 adsorption by electrostatic attraction.…”

Section: Powdered and Granular Activated Carbonmentioning

confidence: 77%

“…This can also explain why a steady state is not reached within the 6 weeks of the experiment duration. Moreover at the surface water pH 8 the AC surface charge is almost neutral (+0.16 mV (Salih et al, 2012)) decreasing substantially electrostatic interactions between the AC and the negatively charged nC60 and decreasing the attachment possibilities. Therefore, we attributed the observed removal of nC60 to its decreased stability due to the surface water composition.…”

Section: Removal Efficiency Of Gac In Surface Watermentioning

confidence: 97%

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Removal of engineered nanoparticles in drinking water treatment processes

Floris

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We passed through earth lightly as water, said Antonio Setzu, as water flowing, springs, from the dip full of the fountain, slides and winds among moss and ferns, down to the roots of the cork oak and almond trees or slips down on the stones, through the mountains and the hills up to the plan, from the streams to the river, slows down towards the swamps and the sea, called by the sun to become vapour and wind dominated cloud and blessed rain. Apart from the madness of killing each other for irrelevant reasons, we were happy. The plants and swamps were fertile, mountains rich of pasture and springs. The food was not lacking even in the years of famine. We did a blood-colored wine, sweet on the palate, and a bearer of happy dreams. On the seventh day of the folding oaks wind month we used met all the nations around the sacred spring, and for seven days and seven nights we ate, drank, we sang and danced in honor of Is. Singing, playing, dancing, grow, harvest, milking, carving, melting, kill, die, singing, playing, dancing was our life. We were happy, apart from the madness of killing each other for insignificant reasons. Passavamo sulla terra leggeri come acqua, disse Antonio Setzu, come acqua che scorre, salta, giù dalla conca piena della fonte, scivola e serpeggia fra muschi e felci, fino alle radici delle sughere e dei mandorli o scende scivolando sulle pietre, per i monti e i colli fino al piano, dai torrenti al fiume, a farsi lenta verso le paludi e il mare, chiamata in vapore dal sole a diventare nube dominata dai venti e pioggia benedetta. A parte la follia di ucciderci l'un l'altro per motivi irrilevanti, eravamo felici. Le piante e le paludi erano fertili, i monti ricchi di pascolo e fonti. Il cibo non mancava neppure negli anni di carestia. Facevamo un vino colore del sangue, dolce al palato e portatore di sogni allegri. Nel settimo giorno del mese del vento che piega le querce incontravamo tutte le genti attorno alla fonte sacra e per sette giorni e sette notti mangiavamo, bevevamo, cantavamo e danzavamo in onore di Is. Cantare, suonare, danzare, coltivare, raccogliere, mungere, intagliare, fondere, uccidere, morire, cantare, suonare, danzare era la nostra vita. Eravamo felici, a parte la follia di ucciderci l'un l'altro per motivi irrilevanti. Passavamo sulla terra leggeri Sergio Atzeni 2.4.6 Discussion overall filtration behaviour under typical full-scale conditions 78 2.5 Conclusion ________________________________________________________________________ 79 Acknowledgement _________________________________________________________________________ 80 References _________________________________________________________________________________ 81 3 Effect of multicomponent fouling during microfiltration of natural surface waters containing nC60 fullerene nanoparticles _________________________________________________ 85 3.1

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Section: Column Studysupporting

confidence: 84%

Section: Powdered and Granular Activated Carbonmentioning

confidence: 77%

Section: Removal Efficiency Of Gac In Surface Watermentioning

confidence: 97%

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Removal of engineered nanoparticles in drinking water treatment processes

Floris

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“…The surface charge of the adsorbents governs the interactions between the adsorbents and the sorbate [26]. The Zeta potential of Ti-CHI with and without F − sorption as the pH varies from 4 to 10 is shown in Fig.…”

Section: Surface Charge Measured Using the Zeta Potentialmentioning

confidence: 99%

Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution

Liu

et al. 2014

Applied Surface Science

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a b s t r a c tA cost effective bio-adsorbent, titanium(IV) hydrate based on chitosan template (Ti-CHI), was synthesized using Ti(SO 4 ) 2 and chitosan for defluoridation from aqueous solutions. The Ti-CHI material was characterized using FTIR, SEM with EDX, XRD, XPS and Zeta potential. The adsorption kinetics of fluoride onto Ti-CHI followed pseudo-second-order and intra-particle diffusion models. The Ti-CHI was effective for defluoridating systems with low fluoride concentrations (4.52 mg/L), exhibiting a 87.50% removal rate and permitting a residual fluoride concentration (0.55 mg/L). The most stable pH range for fluoride removal was from 4 to 9. After combining the results of pH effects, FTIR and Zeta potential, the NH groups and Ti OH groups were revealed as the fluoride adsorption sites on Ti-CHI. In addition, the carbonate ions present in the aqueous solutions adversely impact the fluoride adsorption. The Langmuir, Freundlich, and Langmuir-Freundlich models were used to illustrate the isotherms of the adsorption process. The adsorption of fluoride onto Ti-CHI fits the Langmuir and Langmuir-Freundlich isotherm models well. The maximum adsorption capacity for fluoride on the Ti-CHI was 16.12 mg/g. Thermodynamic studies revealed that the adsorption process was spontaneous.

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“…In particular, iron oxide nanoparticles are a promising adsorbent because it has high reactivity, and elemental iron is non-toxic itself and ubiquitous on the earth (accounting for 6% wt. of the Earth's crust) [22,23]. In water treatment, iron oxide nanoparticles have been demonstrated to effectively remove inorganic anions such as arsenate [24], perchlorate [18] and bromate [25].…”

Section: Introductionmentioning

confidence: 99%