Phosphate removal from aqueous solutions using zero valent iron (ZVI): Influence of solution composition and ZVI aging

Sleiman, Nathalie; Deluchat, Véronique; Wazne, Mahmoud; Mallet, Martine; Courtin-Nomade, Alexandra; Kazpard, Véronique; Baudu, Michel

doi:10.1016/j.colsurfa.2016.11.014

Cited by 78 publications

(25 citation statements)

References 31 publications

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“…The secondary electron image of the oxide in Figure 5(b) exhibited a plate-like or flakelike structure, generally related to the presence of lepidocrocite hydroxide [93,94]. The fine spherical oxides (less than 200 nm) shown in Figure 5(c) are consistent with the morphology of magnetite [95,96]. The oxide morphology shown in Figure 5 The formation of these oxides and hydroxides on the surface of the ZVI plays a critical role in removing contaminants, either by adsorption, precipitation, co-precipitation [99] or by favouring the formation of a passive layer on the metal [94], which limits the mass transport of ferrous ions from ZVI to the aqueous solution [36,100].…”

Section: Characterization Of Zvi Nail and Its Corrosion Productssupporting

confidence: 53%

Fenton pre-oxidation of natural organic matter in drinking water treatment through the application of iron nails

Santos

Teixeira

Zhou

et al. 2021

Environmental Technology

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This study investigated for the first time the efficiency of an advanced oxidation process (AOP) zero valent iron/hydrogen peroxide (ZVI/H 2 O 2 ) employing iron nails for the removal of Natural Organic Matter (NOM) from natural water of Regent's Park lake, London, UK. The low cost of nails and their easy separation from the water after the treatment make this AOP attractive for water utilities in low-and middle-income countries. The process was investigated as a pre-oxidation step for drinking water treatment. Results showed that UV254 removal in the natural water was lower than that of simulated water containing commercial humic acid (HA), indicating a matrix effect. Statistical analysis confirmed the maximum removal of dissolved organic carbon (DOC) in natural water depends on the initial pH (best at 4.5) and H 2 O 2 dosage (best at 100% excess of stoichiometric dosage). DOC and UV254 removals under this operational condition were 51% and 89%, respectively. Molecular weight (MW) and specific UV absorbance (SUVA254) were significantly reduced to 74% and 78%, respectively. Formation of Chloroform THM in natural water sample after the ZVI/H 2 O 2 process (initial pH 4.5) was below the limit for drinking water, and 48% less than the THM formation in the same water not subjected to pre-oxidation. Characterization of oxidation products on the iron-nail-ZVI surface after the ZVI/H 2 O 2 treatment by SEM, XRD, and XPS identified the formation of magnetite and lepidocrocite. Results suggest that the investigated ZVI/H 2 O 2 process is a promising technology for removing NOM and reducing THM formation during drinking water treatment.

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Section: Characterization Of Zvi Nail and Its Corrosion Productssupporting

confidence: 53%

Fenton pre-oxidation of natural organic matter in drinking water treatment through the application of iron nails

Santos

Teixeira

Zhou

et al. 2021

Environmental Technology

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“…Therefore, PR was maximized (99.5%) at Fe(II)/P ¼ 2, whereas the amount of iron sludge that was poorly crystallized increased with the ratio of ferrous to phosphate ions (from Fe(II)/P ¼ 1 to 2.4) and the amount of mineral vivianite decreased. 42 In contrast, the weak background noise in the XRD pattern of the FBC product suggests that the ferrous phosphate pellets exhibited greater crystallinity than when the ferrous phosphate in the sludge. The signal from quartz was obtained as a result of the addition of seed material.…”

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confidence: 84%

Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

2017

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Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC) † Ricky Priambodo, a Yu-Jen Shih * b and Yao-Hui Huang * acIn this investigation, fluidized bed crystallization (FBC) is utilized to treat phosphorus wastewater that is produced by the manufacture of thin film transistor-liquid crystal displays (TFT-LCD). TFT-LCD wastewater contains 500 AE 10 ppm phosphorus. The pH and molar ratio of Fe/P for removing phosphorus was initially examined by performing a jar-test. The parameters of the FBC -effluent pH e , Fe/P ratio and the upflow velocity (m h À1 ) -were tested to recover phosphorus from wastewater as ferrous phosphate pellets, characterized using an X-ray diffractometer (XRD) and scanning electron microscopy (SEM), and silica sand was used as the seed material. The experimental results revealed that the control of effluent pH e was an essential parameter in maximizing the phosphorous removal (PR%) and crystallization ratio (CR%). At pH e 5-6, the supersaturation of phosphate precipitation by conditioning the molar ratio of Fe/P to 1.5 and the upflow rate was adjusted within the range of 30.56-68.76 m h À1 in the metastable zone at a cross-section loading of 0.72 kg per P per h per m 2 , leading to a phosphorus removal (PR) of 95% and a crystallization ratio (CR) of 63%. Under optimal hydraulic conditions, the treatment of real wastewater in a FBC process was viable by converting the pollutant into crystals with a high-purity phase of vivianite (Fe 3 (PO 4 ) 2 $8H 2 O).

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“…NZVI particles can treat contaminants effectively because of their high specific surface area-to-volume ratio, rapid kinetics, and high reactivity [5,26,55]. Researchers have used NZVI to treat different contaminants [38] including chlorinated compounds [10,29], dichromate [66], pesticides [8,11,14], arsenic [9,27], heavy metals [21,30,31,34,64], nitrate and ammonia [12,56,67], and phosphate [1,49,50,62,63]. Additionally, NZVI has been explored for possible use in algal (energy) production [2].…”

Section: Introductionmentioning

confidence: 99%

Modified tapioca starch for iron nanoparticle dispersion in aqueous media: potential uses for environmental remediation

et al. 2019

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Synthesis of cost-effective surface-modified nanoscale zero-valent iron (NZVI) for use in environmental remediation is a challenge. Herein, we report the synthesis of modified tapioca starch-coated NZVI (CNZVI) particles and their application for effective aqueous nitrate remediation. We used 2-octen-1-ylsuccinic anhydride (OSA) to modify the native starch and, thus introduced carboxyl and ester groups for effective binding of the starch to the NZVI surface. Coating NZVI (3 g L −1) with 35% OSA-modified tapioca starch (10 g L −1) significantly improved colloidal stability of CNZVI in deionized (DI) water compared to bare (unmodified) NZVI (p = 0.000). Approximately 66% of CNZVI remained suspended till 2 h as compared to 4% of bare NZVI. Nitrate removal studies (20, 40, and 60 mg NO − 3-N L −1 and 1 g L −1 of nanoparticles) showed CNZVI removed nitrate effectively (54-71% removal). The nitrate removal by CNZVI followed second-order reactions with surface normalized reaction rate constants ranging from 0.003 to 0.007 L m −2 h −1. Shelf life of the coated nanoparticles was found to be 3 months. High biochemical oxygen demand was expressed during respirometric biodegradation studies indicating ease of biodegradation of the CNZVI particles. Coating NZVI particles with OSA-modified tapioca starch is expected to have widespread scientific and industrial application potentials for ex situ as well as in situ contaminant remediation. The authors opine that the use of tapioca starch as the raw material for coated nanoparticle synthesis will be a value addition for the crop, and thus, nanotechnology will contribute to agricultural economy.

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Phosphate removal from aqueous solutions using zero valent iron (ZVI): Influence of solution composition and ZVI aging

Cited by 78 publications

References 31 publications

Fenton pre-oxidation of natural organic matter in drinking water treatment through the application of iron nails

Fenton pre-oxidation of natural organic matter in drinking water treatment through the application of iron nails

Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

Modified tapioca starch for iron nanoparticle dispersion in aqueous media: potential uses for environmental remediation

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