Stable isotope insights into the weathering processes of a phosphogypsum disposal area

Papaslioti, Evgenia-Maria; Pérez‐López, Rafael; Parviainen, Annika; Macías, Francisco; Huertas, António Delgado; Garrido, Carlos J.; Marchesi, Claudio; Nieto, José Miguel

doi:10.1016/j.watres.2018.04.060

Cited by 18 publications

(4 citation statements)

References 22 publications

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“…Also, the higher pH of the water could trigger the precipitation of some metals (Rodgers et al, 2019). The higher concentration of phosphor in H1S versus H2S may be due to the input of phosphogypsum-rich wastewater from a nearby fertilizer plant (Sainz et al, 2004), which recently was shown to contaminate the estuary with heavy metals through a weathering process (Papaslioti et al, 2018). The presence of other contaminants in the estuary was not the aim of this study; however, it is advisable, based on the discharge of effluents from the Huelva WWTP into the estuary, which can provide contamination by antibiotics and other pharmaceuticals as has been detected in the effluents from urban WWTPs around the world.…”

Section: Discussion Environmental Conditions Of the Sampling Zonesmentioning

confidence: 99%

“…The WWTP of Huelva, a city with about 145,000 inhabitants, processes urban wastewaters about 240.000 population equivalents 2 ; and emits its effluents into the estuary. Also, effluents from a number of industries around the estuary, including oil refineries, metallurgic industries, fertilizers plants, etc., (Figure 1) arrive in the estuary to create a multicontaminated environment (Davis et al, 2000;Sainz et al, 2004;Pérez-López et al, 2011;Amils, 2016;Papaslioti et al, 2018). Moreover, some studies have reported the presence of radioactivity in the estuary that is related to the fertilizer production that uses uranium-containing phosphogypsum, which accumulates in sediments (Martínez-Aguirre and García-León, 1997;Elbaz-Poulichet et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Bacteria From the Multi-Contaminated Tinto River Estuary (SW, Spain) Show High Multi-Resistance to Antibiotics and Point to Paenibacillus spp. as Antibiotic-Resistance-Dissemination Players

2020

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Bacterial resistance to antibiotics is an ever-increasing phenomenon that, besides clinical settings, is generally assumed to be prevalent in environmental soils and waters. The analysis of bacteria resistant to each one of 11 antibiotics in waters and sediments of the Huelva's estuary, a multi-contaminated environment, showed high levels of bacteria resistant mainly to Tm, among others. To further gain knowledge on the fate of multi-drug resistance (MDR) in environmental bacteria, 579 ampicillinresistant bacteria were isolated tested for resistance to 10 antibiotics. 92.7% of the isolates were resistant to four or more antibiotic classes, indicating a high level of multi-resistance. 143 resistance profiles were found. The isolates with different MDR profiles and/or colony morphologies were phylogenetically ascribed based on 16S rDNA to phyla Proteobacteria, Firmicutes, Actinobacteria, and Bacteroidetes, including 48 genera. Putative intrinsic resistance was detected in different phylogenetic groups including genera Altererythrobacter, Bacillus, Brevundimonas, Erythrobacter, Mesonia, Ochrobactrum, and Ponticaulis. Correlation of the presence of pairs of the non-intrinsicresistances in phylogenetic groups based on the kappa index (κ) highlighted the co-habitation of some of the tested pairs at different phylogenetic levels. Maximum correlation (κ = 1.

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Section: Discussion Environmental Conditions Of the Sampling Zonesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bacteria From the Multi-Contaminated Tinto River Estuary (SW, Spain) Show High Multi-Resistance to Antibiotics and Point to Paenibacillus spp. as Antibiotic-Resistance-Dissemination Players

2020

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“…The stacks are located within the tidal prism of the Huelva Estuary, which has a great influence on the weathering of phosphogypsum waste by means of estuarine tidal waters (Papaslioti et al, 2018). The highly-contaminated groundwater contained in the phosphogypsum piles migrates towards the edge of the stack forming acidic leakages, known as edge outflows, that have polluted the estuary until nowadays (Pérez-López et al, 2016;Papaslioti et al, 2018). Another source of contamination is the process water present on the surface of the piles, used to slurry the phosphogypsum and transport it from the industry.…”

Section: Environmental Setting and Objectivesmentioning

confidence: 99%

“…Thus, the Huelva phosphogypsum is additionally affected by redox processes because of the complex soil cover applied to rehabilitate the industrial site. However, previous studies (Pérez-López et al, 2016;Papaslioti et al, 2018) have shown that the rehabilitation measures are ineffective and the edge outflows still leak to the estuary, highlighting the importance in improving the current remediation techniques. The full awareness of the redox processes occurring in a redox-dynamic phosphogypsum stack is the aim of the current study.…”

Section: Environmental Setting and Objectivesmentioning

confidence: 99%

Effects of redox oscillations on the phosphogypsum waste in an estuarine salt-marsh system

et al. 2020

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Salt marshes are natural deposits of heavy metals in estuarine systems, where sulphide precipitation associated with redox changes often results in a natural attenuation of contamination. In the present study, we focus on the effects of variable redox conditions imposed to a highly-polluted phosphogypsum stack that is directly piled over the salt marsh soil in the Tinto River estuary (Huelva, Spain). The behaviour of contaminants is evaluated in the phosphogypsum waste and in the marsh basement, separately, in controlled, experimentally-induced oscillating redox conditions. The results revealed that Fe, and to a lesser extent S, control most precipitation/dissolution processes. Ferric iron precipitates in the form of phosphates and oxyhydroxides, while metal sulphide precipitation is insignificant and appears to be prevented by the abundant formation of Fe phosphates. An antagonistic evolution with changing redox conditions was observed for the remaining contaminants such as Zn, As, Cd and U, which remained mobile in solution during most of experimental run. Therefore, these findings revealed that high concentrations of phosphates inhibit the typical processes of immobilization of pollutants in salt-marshes which highlights the elevated contaminant potential of phosphogypsum wastes on coastal environments.

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InSAR-based mapping of ground deformation caused by industrial waste disposals: the case study of the Huelva phosphogypsum stack, SW Spain

González

2022

Bull Eng Geol Environ

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Close to the city of Huelva, SW Spain, and near the Atlantic Ocean, there is a phosphogypsum (PG) stack that accumulates 100 Mt of wastes and extends over 1000 ha. The stack lies directly over estuarine unconsolidated sediments with no protective layer in between. Here, we evaluate for the first time the structural stability of the PG stack, monitoring the deformation suffered by the salt-marsh basement. Through the web-based Geohazard Exploitation Platform (GEP) of the European Space Agency (ESA), a specific differential SAR interferometry (DInSAR) algorithm known as Parallel Small Baseline Subset (P-SBAS) has been used to process 279 ESA Sentinel-1 images acquired between October 2016 and June 2021. Resulting displacement maps and time-series curves reveal vertical displacements of up to 16 cm/year. This vertical motion has been associated to subsidence. In parallel with subsidence, horizontal movements > 2.5 cm/year have been also accounted and linked to talus destabilization. The analysis also demonstrates that the Huelva PG stack is vulnerable to adverse weather condition. The present study demonstrates that the InSAR-based methods are effective tools for monitoring the stability and ground motion of large waste stockpiles.

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Stable isotope insights into the weathering processes of a phosphogypsum disposal area

Cited by 18 publications

References 22 publications

Bacteria From the Multi-Contaminated Tinto River Estuary (SW, Spain) Show High Multi-Resistance to Antibiotics and Point to Paenibacillus spp. as Antibiotic-Resistance-Dissemination Players

Bacteria From the Multi-Contaminated Tinto River Estuary (SW, Spain) Show High Multi-Resistance to Antibiotics and Point to Paenibacillus spp. as Antibiotic-Resistance-Dissemination Players

Effects of redox oscillations on the phosphogypsum waste in an estuarine salt-marsh system

InSAR-based mapping of ground deformation caused by industrial waste disposals: the case study of the Huelva phosphogypsum stack, SW Spain

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