Removal of Fe(II) from groundwater via aqueous portlandite carbonation and calcite-solution interactions

Hamdouni, Afef; Montes-Hernandez, German; Tlili, Mohamed; Findling, Nathaniel; Renard, François; Putnis, Christine V.

doi:10.1016/j.cej.2015.07.077

Cited by 21 publications

(9 citation statements)

References 40 publications

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“…An increase in the uptake capacity of CSG-NH2 adsorbents with increasing initial Fe(II) concentration may be due to both the higher collision probability between Fe(II) ions and the adsorbent particles and the fact that all initial active sites on the surface of CSG-NH2 were vacant. A similar trend was observed for the removal of Fe(II) from groundwater via aqueous portlandite carbonation and calcite-solution interactions (Hamdouni et al, 2016). The high value of the maximum adsorption capacity of CSG-NH2 and silica gel due to having of abundance functional groups (hydroxyl and amino) on its surface, providing anchor sites for iron ion complexation.…”

Section: The Optimum Conditions For Fe(ii) Removalsupporting

confidence: 51%

“…It is often present in groundwaters worldwide and may existin a soluble form as ferrous iron (Fe 2+ or Fe (OH) + ) or complexed forms as ferric iron (Fe 3+ ) forming colloidal minerals and/or associated with organic matter (Hamdouni et al, 2016). Although iron is an essential nutrient for humans and has beneficial effects on health, its presence in water may cause contaminations, particularly at high concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…It can influence the taste and esthetic quality of the water. Indeed, the oxygen from air induces its rapid oxidation to form ferric hydroxide or oxyhydroxide precipitates for pH>6, that can generate toxic derivatives and develop infections such as neoplasia, cardiomyopathy, and arthropathy (Hamdouni et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Nuengmatcha¹,

Saengsane²,

Teppaya³

et al. 2017

j.appsci

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The amino group (-NH2) is one of the most important functional groups of ligands. Particularly, 3-aminopropyl-trimethoxysilane (APTMS) has relatively high affinity to bind various to metal ions. The present study was aimed to modify commercial silica gel (CSG) with the APTMS via silanization process to acquire amino groups (CSG-NH2) as an adsorbent for the removal of iron from synthetic aqueous solution. For an optimal adsorption study, the effects of the initial concentration of Fe(II) (1-80 mg/L), pH of solution (pH 1-10), contact time (1-36 hours) and temperature (30-60˚C) were investigated. The results showed that the adsorption capacity of the obtained CSG-NH2 for the Fe(II) was 60.80 mg/g at pH 4, and complete adsorption equilibrium was reached within 24 hrs. The adsorption isotherm of the CSG-NH2 for Fe(II) was well fitted by the Langmuir isotherm. In addition, thermodynamic data demonstrated that the Fe(II) adsorption onto the CSG-NH2 surface was mainly an exothermic spontaneous reaction. This implies that CSG-NH2 can be used as a high potential adsorbent for the removal of ferrous ion from contaminated wastewater.

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Section: The Optimum Conditions For Fe(ii) Removalsupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Nuengmatcha¹,

Saengsane²,

Teppaya³

et al. 2017

j.appsci

View full text Add to dashboard Cite

show abstract

“…Groundwater is the vital source of drinking water. It quickly gets contaminated with dissolved ferrous ion (Fe(II)) that restricts its consumption as potable water because it forms colloidal red matter (mainly ferric oxyhydroxides) under oxic conditions at near neutral pH (>6) conditions (Hamdouni et al, 2016). Iron (Fe) in groundwater occurs the problems for applications such slag formation in boilers and hand pumps or tube fail to provide the required service due to clogging by Fe deposition (Maneechakr and Karnjanakom, 2017).…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Fe(II) Solution by Sugarcane Bagasse and Activated Carbon Prepared from Sugarcane Bagasse

Sawasdee¹,

Watcharabundit²

2019

CMUJNS

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Fe(II) contaminant in groundwater is one of the most important in the environmental pollutions as it affects the taste, esthetic quality of the water and turns the color of the water to red-brown. Moreover, when Fe(II) contaminate in large amounts, it is harmful to health. The objective of this study was to evaluate the performance of Fe(II) removal in aqueous solution by the low-cost adsorbents namely, sugarcane bagasse (SB) and activated carbon prepared from sugarcane bagasse (ACSB). The two adsorbents were characterized by BET, FTIR, SEM, and XRF. The adsorption behavior of SB and ACSB for Fe(II) in aqueous solution was investigated as the function of pH (1-5), contact time (5-360 min), initial Fe(II) concentration (50-250 mg/L), and temperature (20-40 o C). The adsorption data were analyzed by isotherm and kinetic models. The experimental equilibrium data were best fitted with the Langmuir isotherm model and the maximum monolayer adsorption capacity values were 39.52 and 131.57 mg/g for the SB and the ACSB respectively. The kinetic adsorption data were found to fit well with the pseudo-second-order kinetic and intraparticle diffusion models. Thermodynamic analysis results showed that the adsorption of Fe(II) was spontaneous and endothermic in nature, and was controlled by physical mechanism. In summary, the findings suggested that SB and ACSB were efficient adsorbents, and ACSB showed higher removal of Fe(II) from aqueous solution.

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“…The hydrated amorphous Fe oxyhydroxide giving the characteristic orange color to the tufa is thermodynamically stable for all conditions considering the observed pH and oxic conditions, yet it does seem to support a substantial precipitate layer. In the absence of a coprecipitating porous matrix, Fe oxyhydroxides are likely to occur as small particles with slow settling velocity that are mobilized by the bulk stream(Hamdouni et al, 2016). A preliminary analysis with SEM-EDS of the solid samples shows an association of Fe with nanoparticles (Figure 5).…”

mentioning

confidence: 99%

Rusty river: Effects of tufa precipitation on sediment entrainment in the Estero Morales in the central Chilean Andes

Ravazzolo

Mao

Escauriaza

et al. 2019

Science of The Total Environment

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Rivers and streams continuously shape and reform their channels through the transport of sediment. One of the most important parameter used to assess this transformation is the threshold for incipient grain motion. To date, limited studies have reported that several biotic and abiotic factors can affect this parameter. However, the effects of tufa precipitation on sediment entrainment and dynamics are still unexplored. The Estero Morales is an Andean stream in Central Chile affected by the phenomenon of tufa precipitation during the winter. Along the wetted channels, tufa precipitate creates a thin solid layer that covers the sediments. A series of field surveys and flume experiments were conducted to analyze the effect of tufa precipitation on the initiation of motion and sediment dynamics. Along the wetted areas of the river, a portable dynamometer was used to explore the force needed to dislocate the grains affected by tufa precipitation from the surrounding sediments. Flume experiments were conducted to compare the incipient motion of sediment covered by tufa precipitation with unaffected sediment. Geochemical analyses were conducted to study the precipitate chemistry, mineralogy and texture. The results demonstrate that greater force is needed to move sediment particles affected by tufa precipitation compared to unaffected ones. In addition, lower sediment transport rates were measured on sediment affected by tufa precipitation, especially for the largest sediment size. These results could have important implications for studies concerning sediment dynamics and contaminant fate

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Removal of Fe(II) from groundwater via aqueous portlandite carbonation and calcite-solution interactions

Cited by 21 publications

References 40 publications

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Iron removal from synthetic aqueous solution using amino functionalized commercial silica gel as adsorbent

Adsorption of Fe(II) Solution by Sugarcane Bagasse and Activated Carbon Prepared from Sugarcane Bagasse

Rusty river: Effects of tufa precipitation on sediment entrainment in the Estero Morales in the central Chilean Andes

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