Challenges in Groundwater Remediation with Iron Nanoparticles: Enabling Colloidal Stability

Krajangpan, Sita; Chisholm, Bret J.; Kalita, Harjyoti; Bezbaruah, Achintya N.

doi:10.1061/9780784410301.ch08

Cited by 7 publications

(7 citation statements)

References 81 publications

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“…Nitrates are almost completely converted to ammonium according to the fol lowing reactions [47]: This agrees with the data obtained earlier for the abiotic reduction of [10,13,24,26,28,31,40]. Magnetite was the major corrosion product of metallic iron, and no iron hydroxides were found.…”

Section: Nosupporting

confidence: 90%

“…A large volume of contaminated water satu rated soil material should be purified sometimes. Then, the introduction of mobile Fe 0 nanoparticles into the contaminated soil is advisable, because the particles spread far from the injection holes [31,38]. The technologies with the use of Fe 0 nanoparticles are drawing increasing interest [38].…”

Section: Role Of Fe 0 In the Purification Of Groundwater From Nitratesmentioning

confidence: 99%

“…The traditional remediation of polluted water is based on the pumping out of contaminated water or the excavation of contaminated material followed by its purification [31]. This is a very expensive proce dure [14,50].…”

Section: Introductionmentioning

confidence: 99%

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Degradation of nitrates with the participation of Fe(II) and Fe(0) in groundwater: A review

Vodyanitskiĭ

Mineev

2015

Eurasian Soil Sc.

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Nitrates from soil and nitrogen fertilizers unused by plants become hazardous pollutants and con taminate surface and ground waters. In the water saturated layers, into which nitrates are leached, the con tent of organic matter (i.e., electron donors necessary for nitrification) can be insufficient. The deficiency of electrons in the groundwater can be eliminated by Fe(II) minerals that remained in the heavy rocks and are available to microorganisms due to dispersion. However, when the groundwater table is shallow (less than at 10 m), the natural denitrification develops poorly; therefore, remediation is needed to enrich the contami nated water with electron donors. Zerovalent iron is most frequently used for this purpose. The efficiency of the Fe 0 barriers for the purification of groundwater from nitrates increases due to the activation of anaerobic denitrifying bacteria. In addition, the geochemical conditions and the composition of the bacterial commu nity change in the Fe 0 barrier zone, which favors the development of a wide range of anaerobic hydro genotrophic bacteria (primarily Fe(III) reductants).

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Section: Nosupporting

confidence: 90%

Section: Role Of Fe 0 In the Purification Of Groundwater From Nitratesmentioning

confidence: 99%

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Degradation of nitrates with the participation of Fe(II) and Fe(0) in groundwater: A review

Vodyanitskiĭ

Mineev

2015

Eurasian Soil Sc.

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“…NZVI coated alginate bead was used by Bezbaruah et al (2011) to reduce NZVI agglomeration but it was not very effective. Krajangpan et al, (2009) …”

Section: Introductionmentioning

confidence: 97%

“…NZVI is more reactive due to its unique properties like smaller size (< 100 nm) and high surface area (25-54 m 2 /g) (Krajangpan, 2009). Although the high reactivity of NZVI is a positive factor for environmental remediation applications, they have some difficulties in their effective application, particularly because of their lack of colloidal stability in aqueous environment.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Delivery Vehicles for Groundwater Remediation : Sustainability Evaluation through Biodegradation Studies

Archana

Kalita

Chisholm

et al. 2012

World Environmental and Water Resources Congress 2012

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The use of biodegradable polymer coated iron nanoparticles for groundwater remediation is an emerging area of research. A polymer coating increases colloidal stability of the nanoparticles.The lack of biodegradation of the conventional polymers used to coat nanoparticles is a major concern, and limits the application of nanotechnology for groundwater remediation. The authors have synthesized a soybean oil based biodegradable amphiphilic copolymer that improves the colloidal stability of the nanoparticles in aqueous environment. A mixed culture of bacteria is used in biodegradation studies, and biochemical oxygen demand, total organic carbon, and reduction in molecular weight of the copolymer have been monitored over time. Microbial growth studies indicate that the microorganisms responsible for the degradation can survive on the copolymer as the only carbon source.

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Adsorption and degradation processes of tributyltin and trimethyltin in landfill leachates treated with iron nanoparticles

Peeters

Lespès

Milačić

et al. 2015

Environmental Research

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Challenges in Groundwater Remediation with Iron Nanoparticles: Enabling Colloidal Stability

Cited by 7 publications

References 81 publications

Degradation of nitrates with the participation of Fe(II) and Fe(0) in groundwater: A review

Degradation of nitrates with the participation of Fe(II) and Fe(0) in groundwater: A review

Nanoparticle Delivery Vehicles for Groundwater Remediation : Sustainability Evaluation through Biodegradation Studies

Adsorption and degradation processes of tributyltin and trimethyltin in landfill leachates treated with iron nanoparticles

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