Retention and distribution of three heavy metals in a carbonated soil: comparison between batch and unsaturated column studies

Plassard, Frédéric; Winiarski, Thierry; Petit‐Ramel, M.

doi:10.1016/s0169-7722(99)00101-1

Cited by 123 publications

(69 citation statements)

References 23 publications

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“…These differences were observed because of the reaction kinetics and the experimental setup. For a calcareous soil, a comparison of the retention of heavy metals in batch and column experiments showed similar results [46]. A comparison of the batch (q e,2.5 or q e,5.0 ) and column capacities (q 10% and q 50% ) using the same stock solution concentrations showed that larger amounts are sorbed on the column materials because of the higher solid-to-solution-ratios [36].…”

Section: Comparison Of Batch and Column Experiments Capacitiesmentioning

confidence: 65%

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Huber

Badenberg

Wulff

et al. 2016

Water

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For the development of decentralized treatment systems for road runoff, the determination of pollutant removal capacities is essential. The aim of this study was to evaluate the impact of boundary conditions on the simultaneous removal of copper, nickel, and zinc by six sorbents used for urban stormwater treatment (i.e., granular activated alumina, anthracite, granular reactivated carbon, granular ferric hydroxide, calcium carbonate, and granular activated lignite). For batch experiments, capacities were determined at initial concentrations within the range of 2.5-180 mg/L with a rotary shaker. Further influences were investigated: the use of a horizontal shaker for concentrations of up to 1080 mg/L, a variation of the initial pH value (5 and 7), and the presence of a buffer. Furthermore, the influences of the filtration process on the capacities were studied. Kinetic experiments were conducted for contact times between 5 min and 120 min. Lab-scale column experiments with inflow concentrations of 2.5 mg/L (copper and nickel) and 5.0 mg/L (zinc) at an initial pH of 5 and a contact time of 11 min were performed for comparison. Selected experiments were subsequently carried out with changes in initial concentrations and contact time. One result is that it is essential to conduct batch experiments with the metals of interest. The capacities determined by column experiments deviated from batch experiments. Batch experiments under well-defined conditions can be used to evaluate different production batches. Column experiments give a more faithful capacity by considering realistic boundary conditions and should be preferred to determine efficiencies and service lives.

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Section: Comparison Of Batch and Column Experiments Capacitiesmentioning

confidence: 65%

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Huber

Badenberg

Wulff

et al. 2016

Water

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“…When the pH of the soil decreases, carbonate dissolution increases and ionic exchange is the principal retention mechanism of heavy metals (Plassard et al, 2000;Elzahabi and Yong, 2001). …”

Section: Resultsmentioning

confidence: 99%

Adsorption of nickel by Indian soils

Ramachandran

D’Souza

2013

J. Soil Sci. Plant Nutr.

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Abstract:Adsorption of metals from liquid into solid phase is one of the most important chemical processes which affect the behaviour and bioavailability of metals in soils, thereby exerts a major influence on their uptake by plant roots. Indian soils, representing the various soil types of tropics, were subjected to Ni treatment of different concentrations and equilibrated at room temperature. The Ni adsorbed by each soil was calculated as the difference between the amount of Ni present in the solution initially and that remaining after equilibration. Results indicated that all the soils under study follow Freundlich and linear adsorption isotherms with highly significant positive correlation. In general, adsorption capacity of the soils for Ni increased with an increase in pH of the soil, whereas, the reverse was found to be true for the rate of adsorption. Significant positive correlations (p = 0.1 -0.001) were obtained between Freundlich's K (adsorption capacity) and pH, CEC and CaCO 3 content of the soils. Also, eight soils of Maharashtra, India, were found to fit in all the three adsorption isotherms, namely, Freundlich, Langmuir and linear. The distribution coefficient (K d ) values of these soils, in general, increased with an increase in pH and CEC of the soils. Adsorption of Ni in soils followed the order: vertisol > entisol > alfisol/ultisol.

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“…The highest values are observed for samples D26 and D71, located at 400 m of the mine. Together with basic pH values, the presence of carbonates in the soil lead to an increase in the retention of heavy metals, mainly as carbonate salts as a consequence of precipitation, the principal retention mechanism of heavy metals [36].…”

Section: Resultsmentioning

confidence: 99%

Heavy Metal Contamination and Mobility at the Mine Area of Draa Lasfar (Morocco)

Àvila¹

2012

TOEPTJ

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Abstract:The present study represents a first insight into the Draa Lasfar mine (Marrakech) to assess the possible diffusion of heavy metals and to predict the risk of their mobility in the surroundings of the mine area. The edaphologic parameters pH, electrical conductivity (EC), loss on ignition (LOI) and CaCO 3 were measured according to standard methods, whilst heavy metals concentration was determined by FP-XRF. Concentration enrichment ratios (CER) were calculated in order to estimate the anthropogenic contribution of target pollutants determining As, Cu, Pb and Zn as the main pollutants, whereas Ba, Ca, Fe, K, Mn, Rb, Sr, Ti and Zr were considered lithogenic components. GIS contour maps of pollutants using CER data, showed the most polluted areas at the vicinity of the mine, especially at the northwest area, probably linked to weathering effects and topography of the area. Particle size studies revealed that As, Pb and Zn are part of the mineral ore while Cu behavior corresponded to an anthropogenic origin. Additionally, mobility assays employing single leaching tests indicated a greater mobility of As and Zn rather than that of Pb and Cu due to their lower adsorption process in the soil, independently of their respective concentration.

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Retention and distribution of three heavy metals in a carbonated soil: comparison between batch and unsaturated column studies

Cited by 123 publications

References 23 publications

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Evaluation of Factors Influencing Lab-Scale Studies to Determine Heavy Metal Removal by Six Sorbents for Stormwater Treatment

Adsorption of nickel by Indian soils

Heavy Metal Contamination and Mobility at the Mine Area of Draa Lasfar (Morocco)

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