Heavy metals removal and hydraulic performance in zero-valent iron/pumice permeable reactive barriers

Moraci, Nicola; Calabrò, Paolo S.

doi:10.1016/j.jenvman.2010.06.019

Cited by 148 publications

(66 citation statements)

References 16 publications

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“…Conventionally, the Fe 0 reactive layer is made up of sand and Fe 0 , wherein the volumetric proportion of sand should exceed 50% [80,81]. In practice, sand can be partly or totally replaced by other available and affordable natural minerals like anthracite, MnO 2 , or pumice [104][105][106][107][108]. These inert (e.g., anthracite, pumice) or reactive, but non-expansive (MnO 2 ) materials primarily serve as a storage surface for in situ generated corrosion products (in situ coating) [109], and thus as an adsorptive surface for inflowing contaminants.…”

Section: The Affordability Of Fe 0 -Amended Sand Filtersmentioning

confidence: 99%

“…This is the fundamental mechanism of contaminant removal in Fe 0 /H 2 O systems [33]. The role of MnO 2 in sustaining the efficiency of Fe 0 filters was explained as follows [105][106][107][108][109][110]: MnO 2 uses Fe 2+ from Fe 0 oxidative dissolution by water (Equation (1)) for its reductive dissolution (Equation (2)):…”

Section: The Affordability Of Fe 0 -Amended Sand Filtersmentioning

confidence: 99%

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Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

et al. 2017

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Metallic iron (Fe 0 )-based filtration systems have the potential to significantly contribute to the achievement of the United Nations (UN) Sustainable Development Goals (SDGs) of substantially improving the human condition by 2030 through the provision of clean water. Recent knowledge on Fe 0 -based safe drinking water filters is addressed herein. They are categorized into two types: Household and community filters. Design criteria are recalled and operational details are given. Scientists are invited to co-develop knowledge enabling the exploitation of the great potential of Fe 0 filters for sustainable safe drinking water provision (and sanitation).

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Section: The Affordability Of Fe 0 -Amended Sand Filtersmentioning

confidence: 99%

Section: The Affordability Of Fe 0 -Amended Sand Filtersmentioning

confidence: 99%

Making Fe0-Based Filters a Universal Solution for Safe Drinking Water Provision

et al. 2017

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“…Due to its micro porous structure, pumice has a high specifi c surface area and low apparent density (0.35-0.65 g/cm 3 ) in aggregate form. Recently, many researchers used pumice for removal of cadmium (Panuccio et al 2009), heavy metals (Moraci and Calabrò 2010), sulfur dioxide (Ozturk and Yildirim 2008) and disinfection by-products (Bekaroglu et al 2010). However, based on our knowledge, it is seldom reported that the pumice stone is used in removal of NH 4 + ion.…”

Section: Introductionmentioning

confidence: 99%

Response surface methodology (RSM) and its application for optimization of ammonium ions removal from aqueous solutions by pumice as a natural and low cost adsorbent

Moradi¹,

Fazlzadeh²,

Pirsaheb³

et al. 2016

Archives of Environmental Protection

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This research was conducted to study the adsorption of ammonium ions onto pumice as a natural and low-cost adsorbent. The physico-chemical properties of the pumice granular were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Modeling and optimization of a NH 4 + sorption process was accomplished by varying four independent parameters (pumice dosage, initial ammonium ion concentration, mixing rate and contact time) using a central composite design (CCD) under response surface methodology (RSM). The optimum conditions for maximum removal of NH 4 + (70.3%) were found to be 100 g, 20 mg/l, 300 rpm and 180 min, for pumice dosage, initial NH 4 + ion concentration, mixing rate and contact time. It was found that the NH 4 + adsorption on the pumice granular was dependent on adsorbent dosage and initial ammonium ion concentration. NH 4 + was increased due to decrease the initial concentration of NH 4 and increase the contact time, mixing rate and amount of adsorbent.

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“…Fe 0 is also a very efficient material for above-ground wastewater treatment and safe dinking water provision [7][8][9]. New Moreover, despite 20 years of intensive research, the question as to whether iron should be used alone or mixed to a cost efficient material is yet to be properly addressed [14][15][16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%