A software tool for simulating contaminant transport and remedial effectiveness in sediment environments

Shen, Xiaolong; Lampert, David J.; Ogle, Stephen M.; Reible, Danny D.

doi:10.1016/j.envsoft.2018.08.014

Cited by 18 publications

(18 citation statements)

References 49 publications

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“…Knowledge of sediments dynamics process is still poor [5]. In recent years, some models of sediment transport have developed [6,7] and researchers' attention to this problem has increased [8,9]. Dynamics of sediments transport helps to understand the land degradation processes [10][11][12] as well as nutrient redistribution [13].…”

Section: Introductionmentioning

confidence: 99%

Element Content in Volcano Ash, Soil and River Sediments of the Watershed in the Volcanic Area of South Iceland and Assessment of Their Mobility Potential

Đorđević

Sakan

Trifunović

et al. 2021

Water

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In this work, we present the results of element content in river sediments and soil of the Rangárvellir river in southern Iceland as well as in the volcano ash from the Eyjafjallajökull eruption in 2010. Severe natural catastrophes have devastating impact on the environment. We selected the Rangárvellir area located in the vicinity of Mt Hekla, Iceland’s most active volcano, for our study. This study site is ideal to investigate wind and water erosion and sediment transport processes of two main glaciers rivers: the Eystri-Rangá and the Ytri-Rangá and the Hroarslækur River. Sediments of these rivers consist of volcano materials, ash and lava. In order to assess the sediment dynamics, we collected sediment, soil and volcanic ash. The fractioning of the elements was carried out using sequential extractions. The distribution of Si indicates that the sediments originate from the same geochemical basis. Li and partly B exist in the first phase of volcanic ash and river sediments but not in the mobile phases of soils. In the mobile phase of volcanic ash, P was found but it did not exist in the first phase of soil and sediments. These results suggest the different chemical fingerprints in the water sediments and surrounding soil.

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Section: Introductionmentioning

confidence: 99%

Element Content in Volcano Ash, Soil and River Sediments of the Watershed in the Volcanic Area of South Iceland and Assessment of Their Mobility Potential

Đorđević

Sakan

Trifunović

et al. 2021

Water

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“…Mathematical models can provide a critical insight into treatment remediation and can work as guide of corrective and preventive actions [46]. Furthermore, these modelling tools may help to improve the electrochemical designs [41] and to assess the best operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Management of solar energy to power electrochemical wastewater treatments

Millán

Fernández-Marchante

Lobato

et al. 2021

Journal of Water Process Engineering

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“…The majority of these models were focused on describing the physical processes involved, such as advection, consolidation, dispersion and bioturbation, by simplifying the geochemical and solid-liquid interaction processes, and often relying on the assumption of local equilibrium and sorption phenomena simply described via a retardation factor, rather than considering time-varying kinetic properties of the different layer materials to represent contaminant partitioning and fate. As mentioned by Shen et al, (2018), sorption/desorption of some organic compounds could be slow and the local equilibrium assumption may be not sufficient to describe the rate of the sorption/desorption process, and mass transfer coefficients are required to represent the sorption kinetics. In addition, Minick and Anderson (2017) showed how the PAH dissolved concentration gradient and compound-specific distribution coefficient can determine the flux occurring across the sediment/water interface, while Yan et al (2019) highlighted the necessity to consider the effect of the mass transfer coefficient on contaminant transport through the contaminated sediment and the capping layer.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations and numerical modelling of in-situ reactive caps for PAH contaminated marine sediments

Bortone

Labianca

Todaro

et al. 2020

Journal of Hazardous Materials

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The present study compared numerical modelling and experimental investigations to evaluate the effectiveness of in-situ reactive capping for marine sediments contaminated by polycyclic aromatic hydrocarbons (PAHs). As a case study, sediment samples from Mar Piccolo (Italy) were analyzed and experiments were undertaken using batch columns. Two types of capping amendments were tested: AquaGate® + 5% of powdered activated carbon (AG PAC) and Organoclay Reactive Core Mat (OC RCM). The column tests were carried out for 20 days, obtaining a short-term PAH distribution for three cases analysed, which compared the application of the two caps with no intervention. In parallel, in order to evaluate the intervention long term efficacy, an ad-hoc multilayered model predicting PAH concentrations into the sediments and the overlying water column was developed and validated with the experimental results. Both capping systems considerably reduced PAH concentrations in the overlying water, with the highest performance seen in AG PAC for benzo[a]pyrene (99%) and anthracene (72%); results also confirmed in the model predictions. In addition, the numerical simulations indicated a good efficiency of both caps over time, obtaining PAH values below the threshold limit in the long term. Although further experiments need to be developed accounting for multiple contamination competitiveness.

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A software tool for simulating contaminant transport and remedial effectiveness in sediment environments

Cited by 18 publications

References 49 publications

Element Content in Volcano Ash, Soil and River Sediments of the Watershed in the Volcanic Area of South Iceland and Assessment of Their Mobility Potential

Element Content in Volcano Ash, Soil and River Sediments of the Watershed in the Volcanic Area of South Iceland and Assessment of Their Mobility Potential

Management of solar energy to power electrochemical wastewater treatments

Experimental investigations and numerical modelling of in-situ reactive caps for PAH contaminated marine sediments

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