Aqueous removal of diclofenac by plated elemental iron: Bimetallic systems

Ghauch, Antoine; Assi, Hala Abou; Bdeir, Sara

doi:10.1016/j.jhazmat.2010.05.139

Cited by 108 publications

(64 citation statements)

References 70 publications

(95 reference statements)

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“…5c). This result corroborates the view that metals are removed by "free" iron corrosion products [21,22,23,25] since both elements exhibit the lowest affinity for iron oxides ( [28,29] and references cited therein). It is very important to notice that the surface charge of the adsorbent alone is not sufficient for the discussion of the removal behaviour.…”

Section: Iron Releasesupporting

confidence: 86%

“…However, apart from Burghardt and Kassahun [24] who investigated the binary Materials selected for study were known to be effective for adsorbing metallic ions (Fe 0 , MnO 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 2 , sand), delaying the availability of iron corrosion products in Fe 0 /H 2 O systems (MnO 2 ) [20][21][22][23][24][25], or as admixing agent (sand).…”

mentioning

confidence: 99%

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Impact of MnO2 on the efficiency of metallic iron for the removal of dissolved CrVI, CuII, MoVI, SbV, UVI and ZnII

Noubactep¹,

Btatkeu

Tchatchueng

2011

Chemical Engineering Journal

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Section: Iron Releasesupporting

confidence: 86%

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confidence: 99%

Impact of MnO2 on the efficiency of metallic iron for the removal of dissolved CrVI, CuII, MoVI, SbV, UVI and ZnII

Noubactep¹,

Btatkeu

Tchatchueng

2011

Chemical Engineering Journal

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“…Therefore, a fourth mechanism for decontamination in packed Fe 0 beds is The concept that contaminants are fundamentally removed by adsorption and co-precipitation is consistent with many experimental observations which remained non-elucidated by the reductive transformation concept [11,12]. Although researchers are continuing to maintain the validity of the latter concept [24][25][26], the new concept was validated [27,28] and has been independently verified [29,30]. As a matter of course the concept of adsorption/co- …”

Section: Introductionmentioning

confidence: 53%

“…Although researchers are continuing to maintain the validity of the latter concept [24][25][26], the new concept was validated [27,28] and has been independently verified [29,30]. As a matter of course the concept of adsorption/co- …”

Section: Metallic Iron For Reactive Wallsmentioning

confidence: 99%

Dimensioning metallic iron beds for efficient contaminant removal

Noubactep¹,

Caré

2010

Chemical Engineering Journal

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Remediation of contaminated groundwater is an expensive and lengthy process. (ii) used Fe 0 amounts must represent 30 to 60 vol-% of the mixture, and (iii) Fe 0 beds are deep-bed filtration systems. The major output of this study is that thicker barriers are needed for long service life. Fe 0 filters for save drinking water production should use several filters in series to achieve the treatment goal. In all cases proper material selection is an essential issue. [5][6][7][8], and (ii) as reagents to assist biofiltration in household filters [3,9,10]. The fundamental process responsible for contaminant removal in both contexts is necessarily the oxidative dissolution of Fe 0 (iron corrosion) which may be coupled with contaminant reduction (reactive walls) or the subsequent precipitation of iron hydroxides which may be coupled with contaminant adsorption and co-precipitation (household filters).Adsorption, co-precipitation and chemical transformations (oxidation and/or reduction) are not mutually exclusive [11][12][13]. It is obvious that in household filters and reactive walls, a synergy between these three processes is responsible for expected and observed decontamination. Moreover, these processes proceed in the inter-granular porosity of the packed beds which are made up of Fe 0 (100 %) or a mixture of Fe 0 and an inert material (e.g. gravel, pumice, sand) [2,14]. Because of the volumetric expansive nature of the process of iron corrosion [15], the porosity of the filtrating systems certainly decreases with increasing service life, possibly yielding complete permeability loss system (filter clogging) [16,17]. The filling of the pore volume by corrosion products is necessarily coupled with improved size exclusion capacity. Therefore, a fourth mechanism for decontamination in packed Fe 0 beds is The concept that contaminants are fundamentally removed by adsorption and co-precipitation is consistent with many experimental observations which remained non-elucidated by the reductive transformation concept [11,12]. Although researchers are continuing to maintain the validity of the latter concept [24][25][26], the new concept was validated [27,28] and has been independently verified [29,30]. As a matter of course the concept of adsorption/co- Metallic iron for household filtersWhile using slow sand filtration for water treatment in rural Bangladesh, it was observed that the filter efficiency for arsenic removal depends on the iron content of natural waters. Arsenic was readily removed from Fe-rich natural waters. Accordingly, Fe 0 is used "to provide a constant input of iron (soluble or surface precipitate) for groundwater low in soluble iron"[32]. The very efficient resulting filter for As removal was the 3-Kolsi filter [10,33]. A typical 3-Kolsi filter contained a layer of about 3 kg Fe 0 (100 % Fe 0 ). However, the 3-Kolsi filter was not sustainable as it clogged after some 8 weeks of operation [3,34].The remarkable efficiency of 3-Kolsi filters has prompted researchers to further develop the system fo...

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“…More recently, Fe 0 was demonstrated as highly effective for the treatment of several other classes of substances, including aromatic nitro compounds, bacteria, heavy metals, herbicides, nitrates, pesticides, radionuclides and viruses [18,[60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79]. Fe 0 materials have also been used in Fenton oxidation reactions [71,72,[80][81][82]. It appears from the overview of treatable contaminants that Fe 0 might be regarded as a technology with the potential to manage all classes of contaminants (inorganic ions, organic poisons, and harmful germs).…”

Section: /H2o System For Contaminant Mitigationmentioning

confidence: 99%

Testing Metallic Iron Filtration Systems for Decentralized Water Treatment at Pilot Scale

Tepong-Tsindé

Crane

Noubactep

et al. 2015

Water

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There are many factors to consider for the design of appropriate water treatment systems including: cost, the concentration and type of biological and/or chemical contamination, concentration limits at which contaminant(s) are required to be removed, required flow rate, level of local expertise for on-going maintenance, and social acceptance. An ideal technology should be effective at producing clean, potable water; however it must also be low-cost, low-energy (ideally energy-free) and require low-maintenance. The use of packed beds containing metallic iron (Fe 0 filters) has the potential to become a cheap widespread technology for both safe drinking water provision and wastewater treatment. for decentralized water treatment particularly in the developing world. A design for safe drinking water to a community of 100 people is also discussed as starting module. It is suggested that Fe 0 filters have the potential for significant worldwide applicability, but particularly in the developing world. The appropriate design of Fe 0 filters, however, is site-specific and dependent upon the availability of local expertise/materials.

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Aqueous removal of diclofenac by plated elemental iron: Bimetallic systems

Cited by 108 publications

References 70 publications

Impact of MnO2 on the efficiency of metallic iron for the removal of dissolved CrVI, CuII, MoVI, SbV, UVI and ZnII

Impact of MnO2 on the efficiency of metallic iron for the removal of dissolved CrVI, CuII, MoVI, SbV, UVI and ZnII

Dimensioning metallic iron beds for efficient contaminant removal

Testing Metallic Iron Filtration Systems for Decentralized Water Treatment at Pilot Scale

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