Iron reductive dissolution in vadose zone soils: Implication for groundwater pollution in landfill impacted sites

Oppong-Anane, Akua Bonsu; Quiñones, Katherine Y. Deliz; Harris, Willie G.; Townsend, Timothy G.

doi:10.1016/j.apgeochem.2018.05.001

Cited by 17 publications

(8 citation statements)

References 79 publications

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“…Cui et al (2017) showed the leaching of Cu and Zn from e-waste recycling sites due to rainfall and irrigation water in the surface soil contributed by Cu(OH) 2 , CuCO 3 , Zn 5 (CO 3 ) 2 (OH) 6 , and amorphous Fe/Mn oxides. In addition, Fe contamination in the groundwater and aquifer at various landfill sites indicates reductive dissolution of iron (hydr-)oxides (Oppong-Anane et al, 2018).…”

Section: A Conceptual Model On Old-landfill Leachate Photodegradationmentioning

confidence: 99%

Characterization and photodegradation pathway of the leachate of Matuail sanitary landfill site, Dhaka South City Corporation, Bangladesh

Akter

Shammi

Jolly

et al. 2021

Heliyon

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This study was carried out to characterize the biogeochemical and physicochemical properties of landfill leachate from Matuail Sanitary landfill site, Dhaka, Bangladesh. In addition, the study also aimed to identify the photodegradation of landfill leachate under natural sunlight. The leachate pH was slightly alkaline (7.87–8.07) with a minimum level of dissolved oxygen, and low BOD 5 /COD ratio that are indicators of the matured methanogenic phase. Ca, Fe, Br, Rb, Cu was present in a considerable amount. A trace amount of Sr, Co, As, Pb, Cr was found in the leachate sample. Fourier Transform - infrared (FTIR) spectra of all three samples had five major peak regions notably at 3440–3450 cm −1 (O–H groups of water), 1638 cm −1 (C=O Amide I, carboxylates C=C, aromatic ring modes, or alkenes), 1385–1390 cm −1 (deformation of the C–H bond in CH 2 and CH 3 , or the asymmetric stretching of COO¯), 1115 cm −1 (stretching of the C–O bond in phenol ethers and phenols) and 605 cm −1 (S–O bends of sulfates). In addition to the appearance of new peak, peak shifting on the 2 nd -day and 5 th -day phototreatment are in compliance with the 34% TOC reduction. From analyzing three-dimensional excitation/emission (3D-EEM) spectra of the raw sample pyrene-like or humic-like peak A (Ex 255/Em 465), soil fulvic-like peak M p (Ex 315/Em 450), and humic-like peak C (Ex 370/Em 455) was found indicating more humified characteristics of the mature landfill site. From 1-hour to 6-hours phototreatment, all three substances slightly lost fluorescence intensity. From the 2 nd day to the 5 th day of photo-treatment, two unknown photo-product was identified within Ex 210/Em 457 and Ex 205/Em 408 at peak A region. Fluorescence intensity lost was 65% for peak A and 44% for peak C. Soil fulvic-like peak M p was absent on the 5 th day of photo-treatment.

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Section: A Conceptual Model On Old-landfill Leachate Photodegradationmentioning

confidence: 99%

Characterization and photodegradation pathway of the leachate of Matuail sanitary landfill site, Dhaka South City Corporation, Bangladesh

Akter

Shammi

Jolly

et al. 2021

Heliyon

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“…Nevertheless, dissolution of soil Fe is not controlled by a single parameter. In addition to pH, parameters such as degree of crystallinity and type of mineral phases can play important roles . Similar to iron, manganese is moderately correlated with pH w and pH Ca .…”

Section: Results and Discussionmentioning

confidence: 99%

Relationships between Heavy Metals and Their Connection to Amorphous and Total Iron in a Frequently Subsampled Clay Pit Core Sample

Jurković

Murtić

Bašić

et al. 2021

ACS Earth Space Chem.

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Naturally occurring heavy metals are commonly adsorbed onto substances with a large active surface, such as clays and iron oxyhydroxides. Different heavy metals could show different adsorbing preference to clays or iron oxyhydroxides, whereas a deep clay pit sediment sample with frequent subsampling gives the results that are more reliable. This study aimed to reveal differences in behavior of heavy metals and their relationships to total and amorphous iron in the deep clay pit core sample. In this research, 110 samples of the 33.0 m deep clay pit core sample were studied. Nine heavy metals from the clay open pit mine were investigated: total Fe (Fe t ) and amorphous (e.g., limonite) or poorly crystalline (e.g., ferrihydrite) (Fe am ), Mn, Co, Cr, Cu, Ni, Pb, V, and Zn. Total amounts of metals (M t ) were extracted by means of concentrated HNO 3 and HF. Amorphous amounts of iron (Fe am ) were extracted using the ammonium oxalate method. Concentrations of heavy metals were measured with an ICP-OES instrument. For statistical evaluation purposes, the following descriptive statistics tools were used: maximum, minimum, average, and median value. Behavior of heavy metals was investigated through standard deviation (SD), coefficient of variance (CV), skewness (SK), Z score (Z), PCA analysis, correlations, and correlations after Al normalization. The results of the SD and CV indicate that the clay pit sample is very heterogeneous. Heavy metals are mostly highly correlated with total and amorphous Fe. High correlation was found between the pH-related parameters, Fe t −Fe am , Fe−Mn, Fe−Ni, Fe−Co, Co−Ni, Co−Mn, and Pb−Cr (negative). Multivariate statistical analysis distinguished three subgroups: (1) Fe t , Fe am , Ni, Co, and Mn; (2) Pb, Zn, and Cr; and (3) Cu and V, suggesting a possible common source and similar behavior. Although clays are much more present in the samples, heavy metals are mostly connected to iron oxyhydroxides.

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“…In Brazil, the National Environmental Council provides for the conditions and standards for the release of effluents, with the maximum concentration of total ammonia nitrogen being 20 mg/L, while the maximum concentration of dissolved iron allowed is 15 mg/L (Oppong-Anane et al, 2018). Thus, it is evident that the treatment of leachate from environments such as, for example, landfills and stabilization ponds need attention with adequate treatment to remove not only ammonia and iron, but also many other species of contaminating materials.…”

Section: Introductionmentioning

confidence: 99%

Melamine-formaldehyde-silica and melamine-silica-cellulose composites in removing Iron and N-ammonia from landfill leachate

Santos

Junior

Silva

et al. 2021

RSD

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Melamine-formaldehyde based composites are versatile and can be applied in the treatment of contaminated effluents such as landfill leachate that have a high pollutant load, as they are rich in nitrogen atoms, the sites allow interaction with molecules, atoms or ions of interest. Aiming compares the efficiency of two materials based on the same precursors, evaluating the efficiency of two composites, melamine-silica (PMF-Si) and melamine-silica-cellulose (Cel-M-Si) in removing iron and ammonia nitrogen in landfill leachate. Adsorption kinetics showed that PMF-Si and Cel-M-Si composites adsorb iron from 30 min, with an average removal of ~ 93.4%. Application of Cel-M-Si to removed leachate ca. 75.7% iron and 76.6% ammonia nitrogen. In contrast, it was observed that PMF-Si had a removal efficiency of 70.9% for iron and 55.0% for ammonia nitrogen. The comparative tests allowed to conclude that the composites PMF-Si and Cel-M-Si have potential for the treatment of landfill leachate, being low cost materials and easy synthesis.

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Iron reductive dissolution in vadose zone soils: Implication for groundwater pollution in landfill impacted sites

Cited by 17 publications

References 79 publications

Characterization and photodegradation pathway of the leachate of Matuail sanitary landfill site, Dhaka South City Corporation, Bangladesh

Characterization and photodegradation pathway of the leachate of Matuail sanitary landfill site, Dhaka South City Corporation, Bangladesh

Relationships between Heavy Metals and Their Connection to Amorphous and Total Iron in a Frequently Subsampled Clay Pit Core Sample

Melamine-formaldehyde-silica and melamine-silica-cellulose composites in removing Iron and N-ammonia from landfill leachate

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