Fe–Mn Concretions and Nodules to Sequester Heavy Metals in Soils

Gasparatos, Dionisios

doi:10.1007/978-94-007-2439-6_11

Cited by 38 publications

(21 citation statements)

References 109 publications

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“…Nevertheless, as the objective of this study was to determine if a NMO was capable of in situ Pb sorption they were deemed fit for purpose as a model. It should be noted that other sources of NMO such as mine tailing by-products only have trace levels of metals in their composition (Gasparatos, 2012).…”

Section: Characterisation Of the Model Nmo Wastementioning

confidence: 99%

“…Sorption of Pb to MnO x has been shown to be irreversible via the formation of strong inner and outer sphere complexes on octahedral vacancy sites in the malleable crystal structure of MnO x minerals (McKenzie, 1980;Villalobos et al, 2005;Manceau et al, 1992;Matocha et al, 2001). Owing to the small particles size and high specific surface areas MnO x possess they exhibit high surface reactivity, this coupled to their low point of zero charge, which generally falls between a pH of 2 and 5 makes them potent scavengers of Pb (Gasparatos, 2012). Additionally, the ability of MnO x to effectively immobilize Pb resulting in no risk from human ingestion has been described (Beak et al, 2007).…”

Section: Introductionmentioning

confidence: 97%

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Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste

et al. 2015

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A natural Mn oxide (NMO) waste was assessed as an in situ remediation amendment for Pb contaminated sites. The viability of this was investigated using a 10 month lysimeter trial, wherein a historically Pb contaminated soil was amended with a 10% by weight model NMO. The model NMO was found to have a large Pb adsorption capacity (qmax 346±14 mg g(-1)). However, due to the heterogeneous nature of the Pb contamination in the soils (3650.54-9299.79 mg kg(-1)), no treatment related difference in Pb via geochemistry could be detected. To overcome difficulties in traditional geochemical techniques due to pollutant heterogeneity we present a new method for unequivocally proving metal sorption to in situ remediation amendments. The method combines two spectroscopic techniques; namely electron probe microanalysis (EPMA) and X-ray photoelectron spectroscopy (XPS). Using this we showed Pb immobilisation on NMO, which were Pb free prior to their addition to the soils. Amendment of the soil with exogenous Mn oxide had no effect on microbial functioning, nor did it perturb the composition of the dominant phyla. We conclude that NMOs show excellent potential as remediation amendments.

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Section: Characterisation Of the Model Nmo Wastementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste

et al. 2015

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“…These features are typically more resistant to erosion than the surrounding host rock and therefore appear in high relief, or as lag deposits, such as the Meridiani Planum -blueberries‖ (e.g., Chan et al, 2004;McLennan et al, 2005). Concretions form through precipitation of mineral-saturated pore-fluids, and can be triggered by changes in the temperature, fluid pressure, volatile content, or redox state of pore-fluids (e.g., Allison and Pye, 1994;Gasparatos, 2012). Concretions can form at any…”

Section: Introductionmentioning

confidence: 99%

Late-stage diagenetic concretions in the Murray formation, Gale crater, Mars

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Kah

et al. 2019

Icarus

102

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Concretions are prevalent features in the generally lacustrine deposits of the Murray formation in Gale crater. In this work, we document the morphologic, textural, and chemical properties of these concretions throughout 300 meters of Murray formation stratigraphy from Mars Science Laboratory observations between Sols 750-1900. We interpret these observations to constrain the timing and composition of post-depositional fluid events at Gale crater. We determine that the overall diversity of concretion morphology, size, texture, and chemistry throughout the Murray formation indicates that concretions formed in multiple, likely late diagenetic, episodes with varying fluid chemistries. Four major concretion assemblages are observed at distinct stratigraphic intervals and approximately correlate with major distinct chemical enrichments in Mg-S-Ni-Cl, Mn-P, and Ca-S, among other local enrichments. Different concretion size populations and complex relationships between concretions and veins also suggest multiple precipitation events at Gale crater. Many concretions likely formed during late diagenesis after sediment compaction and lithification, based on observations of concretions preserving primary host rock laminations without differential compaction. An upsection decrease in overall concretion size corresponds to an inferred upsection decrease in porosity and permeability, thus constraining concretion formation as postdating fluid events that produced initial cementation and porosity loss. The combined observations of late diagenetic concretions and distinct chemical enrichments related to concretions allow constraints to be placed on the chemistry of late stage fluids at Gale crater. Collectively, concretion observations from this work and previous studies of other diagenetic features (veins, alteration halos) suggest at least six post-depositional events that occurred at Gale crater after the deposition of the Murray formation.

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“…Addition of EDTA and OMW and their combination, single or double dose, had no significant result in increasing the most available fractions of As, i.e., non-specifically (W1) and specifically sorbed (W2). The BCR partitioning scheme demonstrated the affinity of Pb and Zn for Fe oxides, exhibiting an average percent value of 64.9% and 41.5%, respectively, in the reducible fraction (B2) [2]. …”

Section: Distribution Of Arsenic and Metals In Soil Fractionsmentioning

confidence: 99%

“…Various physical, chemical, and biological techniques have been used in order to remediate metal-polluted soils [2,3]. Because of the increased cost and the danger of irreversible changes in soil properties and biodiversity, conventional remediation methods (e.g., vitrification, landfilling, soil washing, electrokinetic systems, etc.)…”

Section: Introductionmentioning

confidence: 99%

Efficacy of EDTA and Olive Mill Wastewater to Enhance As, Pb, and Zn Phytoextraction by Pteris vittata L. from a Soil Heavily Polluted by Mining Activities

et al. 2018

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A pot experiment was conducted to evaluate the effect of Na 2 -EDTA 0.01 M (E) and olive mill wastewater 15% (OMW) on As, Pb, and Zn uptake by Pteris vittata L. grown in a soil highly contaminated by mining activities. A two-factor experimental design was followed; 3 treatments (E, OMW, and E + OMW) × 2 batches (single or double dose). Six weeks after the P. vittata transplanting, all pots received the selected dose of each treatment (Batch I). At 8 weeks, in half of the pots, a second dose of the same treatments was added (Batch II). Plants were harvested after 10 weeks and As, Pb, and Zn concentrations were determined in fronds and roots. Depending on the element, both treatment and batch effects were significant. In Batch II, EDTA application resulted in a 55% increase of As and 9-and 4-fold of Pb and Zn concentrations in the fronds, while OMW treatment substantially reinforced plant uptake when combined with EDTA. Roots to fronds translocation of the metal(loid)s highly increased in Batch II. After harvest, composite soil samples of all treatment-batch combinations were subjected to sequential extraction, but no significant differentiations of As, Pb, and Zn partitioning in soil phases were detected.

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Fe–Mn Concretions and Nodules to Sequester Heavy Metals in Soils

Cited by 38 publications

References 109 publications

Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste

Remediation of a historically Pb contaminated soil using a model natural Mn oxide waste

Late-stage diagenetic concretions in the Murray formation, Gale crater, Mars

Efficacy of EDTA and Olive Mill Wastewater to Enhance As, Pb, and Zn Phytoextraction by Pteris vittata L. from a Soil Heavily Polluted by Mining Activities

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