Valerie Cappuyns | KU Leuven (original) (raw)

Uploads

Papers by Valerie Cappuyns

Research paper thumbnail of Leachability of arsenic and heavy metals from blasted copper slag and contamination of marine sediment and soil in Ninh Hoa district, south central of Vietnam

Applied Geochemistry, 2014

We investigated the characteristics of blasted copper slag (BCS), sediment/soil.Local background ... more We investigated the characteristics of blasted copper slag (BCS), sediment/soil.Local background values of heavy metal (HM) were derived from deeper sediment/soil.Using local background can correct the degree of As or HM contamination.Leached concentration of As and HMs from BCS were low, except Cu.Significant release of Cu from BCS was observed in cascade and pHstat leaching.In recent years, shipping activities developed in Ninh Hoa district (south-central Vietnam), have raised an urgent environmental concern related to the use of copper slag as abrasive material for removing rust from the surface of the ships. This study was conducted to investigate the characteristics of the blasted copper slag (BCS). Enrichment Factors (EF) were used to assess the contamination status of sediments and soils in the surroundings of the BCS dump site. The potential release of As and heavy metals (HMs) from BCS was examined through pHstat and cascade leaching tests in combination with XRD analysis. From the results, As, Cr, Ni, Pb and Zn were characterized as moderate severely enriched to severely enriched while Cu showed extremely severe enrichment in the sediments. Regarding the soil collected at the dump site, it was strongly contaminated with As, Cu and Zn (extremely severe enrichment) whereas Cr, Ni and Pb were ranked as severely enriched. This study also demonstrates that it is important to use local background values of As and HMs in soils and sediments for a correct estimation of the degree of As or HM contamination. The cascade leaching test results from the BCS showed that the concentrations of the regulated HMs leached were lower than the EU limit for non-hazardous waste; except for Cu. Results from pHstat leaching tests at pH 4 with BCS indicated that upon acidification, HM release from the <1 mm fraction is higher compared to the bulk sample. A significant release of Cu from BCS was also observed for both fractions (<1 mm fraction and bulk sample) in pHstat leaching tests. In view of the elevated Cu concentrations found in the slag, the potential recovery of Cu from BCS should be investigated.

Research paper thumbnail of Heavy metals and arsenic in alluvial sediments of the Grote Beek river: Contribution of natural and antropogenic sources

Research paper thumbnail of Invloed van hoofdelementen en substraatkarakteristieken op de samenstelling van riviersedimenten in Vlaanderen

Research paper thumbnail of 2015 Barrie et al

Research paper thumbnail of Influence of major elements on heavy metal composItIon of rIver sedIments

Geologica Belgica

In the present study, the relationship between heavy metals (As, Cd, Cr, Cu, Hg, Pb, Ni, Sn and Z... more In the present study, the relationship between heavy metals (As, Cd, Cr, Cu, Hg, Pb, Ni, Sn and Zn) and major elements and the location and/geological substrate of 105 river sediments in Flanders was investigated. Factor Analysis was used to divide the dataset into four components: a first component including clay, organic matter, Na, Ca, K and Mg, a relationship between Fe, As and Cd, an anthropogenic factor (including Cu, Hg, Pb, Sn and Zn) and finally the pH and insoluble residue. Regression equations were constructed, using major elements such as Fe and Ca as independent variables, besides more classical explaining variables such as clay content (< 2µm fraction), organic matter content and pH. Most heavy metal concentrations could be predicted very well by the independent variables, except Zn, Se and Sn. The results from this study, performed on a dataset of 105 riverbed sediments, indicate that, besides organic matter and clay content, other variables such as the total Fe an...

Research paper thumbnail of Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

CLEAN - Soil, Air, Water, 2015

Research paper thumbnail of Economic and Environmental Performance Indicators in Belgian GRI Reports

Environmental Management and Sustainable Development, 2014

Research paper thumbnail of Potential of inorganic polymers (geopolymers) made of halloysite and volcanic glass for the immobilisation of tailings from gold extraction in Ecuador

Applied Clay Science, 2015

Research paper thumbnail of Waste Derived Sorbents and Their Potential Roles in Heavy Metal Remediation Applications

E3S Web of Conferences, 2013

ABSTRACT Inorganic waste materials that have the suitable inherent characteristics could be used ... more ABSTRACT Inorganic waste materials that have the suitable inherent characteristics could be used as precursors for the synthesis of micro-and mesoporous materials, which present great potential to be re-utilized as sorbent materials for heavy metal remediation. Three inorganic waste materials were studied in the present work: water treatment residuals (WTRs) from an integrated drinking water/wastewater treatment plant, and fly ash and bottom ash samples from a municipal solid waste incinerator (MSWI). These wastes were converted into three sorbent materials: ferrihydrite-like materials derived from drying of WTRs, hydroxyapatite-like material derived from ultrasound assisted synthesis of MSWI fly ash with phosphoric acid solution, and a zeolitic material derived from alkaline hydrothermal conversion of MSWI bottom ash. The performance of these materials, as well as their equivalent commercially available counterparts, was assessed for the adsorption of multiple heavy metals (As, Cd, Co, Ni, Pb, Zn) from synthetic solutions, contaminated sediments and surface waters; and satisfactory results were obtained. In addition, it was observed that the combination of sorbents into sorbent mixtures enhanced the performance levels and, where applicable, stabilized inherently mobile contaminants from the waste derived sorbents.

Research paper thumbnail of Dredged sediments as a resource for brick production: Possibilities and barriers from a consumers’ perspective

Waste Management, 2015

A possible solution for the oversupply of dredged sediments is their use as a raw material in bri... more A possible solution for the oversupply of dredged sediments is their use as a raw material in brick production. Despite the fact that several examples (e.g., Agostini et al., 2007; Hamer and Karius, 2002; Xu et al., 2014) show that this application is feasible, some economic, technical and social limitations interfere with the development of a market of dredged materials in brick production in Flanders. While we describe the main characteristics of the supply side, we focus on the limitations and barriers from the demand side in the present study. Based on a consumers survey we analyze consumers&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; risk perceptions and attitudes towards bricks produced from dredged sediments. Consumers in Flanders are rather suspicious with respect to bricks produced from dredged sediments and their risk perception is mainly determined by the possibility of a bad bargain (brick of inferior quality) and the connotation with chemical contamination. The willingness to pay for bricks made from dredged sediments is mainly influenced by the age of the respondents, as well environmental awareness, and the respondents&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; belief in their ability to influence environmental problems. Sensitization and information of customers seems to be of primary importance to make dredged-sediment-derived bricks a successful product.

Research paper thumbnail of Heavy Metal Behaviour in Overbank Sediments and Associated Soils

Acta hydrochimica et hydrobiologica, 2005

Research paper thumbnail of COMBINATION OF LEACHING TESTS AND MINERALOGICAL CHARACTERISATION TO ASSESS INORGANIC CONTAMINANT MOBILITY IN BLASTED COPPER SLAG

Research paper thumbnail of Ph. D. FLASH PRESENTATIONS SESSIONS

Research paper thumbnail of E (co) nergy

Research paper thumbnail of Paper: SEDIMENT CHARACTERIZATION DURING OXIDATION AND RIPENING AND EVALUATION OF ITS POTENTIAL REUSE

Research paper thumbnail of JOURNAL OF MANAGEMENT & ORGANIZATION

Research paper thumbnail of The speciation of heavy metals and arsenic in contaminated soils: some case studies

Research paper thumbnail of Heavy metal speciation in alluvial sediments of the Grote Beek river: A multidisciplinary approach

Research paper thumbnail of Risk assessment of heavy metal pollution in alluvial soils and sediments of the Grote Beek river (Belgium)

Research paper thumbnail of Assessment of heavy metal and As behaviour in contaminated soils by pHstat leaching

Research paper thumbnail of Leachability of arsenic and heavy metals from blasted copper slag and contamination of marine sediment and soil in Ninh Hoa district, south central of Vietnam

Applied Geochemistry, 2014

We investigated the characteristics of blasted copper slag (BCS), sediment/soil.Local background ... more We investigated the characteristics of blasted copper slag (BCS), sediment/soil.Local background values of heavy metal (HM) were derived from deeper sediment/soil.Using local background can correct the degree of As or HM contamination.Leached concentration of As and HMs from BCS were low, except Cu.Significant release of Cu from BCS was observed in cascade and pHstat leaching.In recent years, shipping activities developed in Ninh Hoa district (south-central Vietnam), have raised an urgent environmental concern related to the use of copper slag as abrasive material for removing rust from the surface of the ships. This study was conducted to investigate the characteristics of the blasted copper slag (BCS). Enrichment Factors (EF) were used to assess the contamination status of sediments and soils in the surroundings of the BCS dump site. The potential release of As and heavy metals (HMs) from BCS was examined through pHstat and cascade leaching tests in combination with XRD analysis. From the results, As, Cr, Ni, Pb and Zn were characterized as moderate severely enriched to severely enriched while Cu showed extremely severe enrichment in the sediments. Regarding the soil collected at the dump site, it was strongly contaminated with As, Cu and Zn (extremely severe enrichment) whereas Cr, Ni and Pb were ranked as severely enriched. This study also demonstrates that it is important to use local background values of As and HMs in soils and sediments for a correct estimation of the degree of As or HM contamination. The cascade leaching test results from the BCS showed that the concentrations of the regulated HMs leached were lower than the EU limit for non-hazardous waste; except for Cu. Results from pHstat leaching tests at pH 4 with BCS indicated that upon acidification, HM release from the <1 mm fraction is higher compared to the bulk sample. A significant release of Cu from BCS was also observed for both fractions (<1 mm fraction and bulk sample) in pHstat leaching tests. In view of the elevated Cu concentrations found in the slag, the potential recovery of Cu from BCS should be investigated.

Research paper thumbnail of Heavy metals and arsenic in alluvial sediments of the Grote Beek river: Contribution of natural and antropogenic sources

Research paper thumbnail of Invloed van hoofdelementen en substraatkarakteristieken op de samenstelling van riviersedimenten in Vlaanderen

Research paper thumbnail of 2015 Barrie et al

Research paper thumbnail of Influence of major elements on heavy metal composItIon of rIver sedIments

Geologica Belgica

In the present study, the relationship between heavy metals (As, Cd, Cr, Cu, Hg, Pb, Ni, Sn and Z... more In the present study, the relationship between heavy metals (As, Cd, Cr, Cu, Hg, Pb, Ni, Sn and Zn) and major elements and the location and/geological substrate of 105 river sediments in Flanders was investigated. Factor Analysis was used to divide the dataset into four components: a first component including clay, organic matter, Na, Ca, K and Mg, a relationship between Fe, As and Cd, an anthropogenic factor (including Cu, Hg, Pb, Sn and Zn) and finally the pH and insoluble residue. Regression equations were constructed, using major elements such as Fe and Ca as independent variables, besides more classical explaining variables such as clay content (< 2µm fraction), organic matter content and pH. Most heavy metal concentrations could be predicted very well by the independent variables, except Zn, Se and Sn. The results from this study, performed on a dataset of 105 riverbed sediments, indicate that, besides organic matter and clay content, other variables such as the total Fe an...

Research paper thumbnail of Release of Potentially Toxic Elements From Industrial Sludge: Implications for Land Disposal

CLEAN - Soil, Air, Water, 2015

Research paper thumbnail of Economic and Environmental Performance Indicators in Belgian GRI Reports

Environmental Management and Sustainable Development, 2014

Research paper thumbnail of Potential of inorganic polymers (geopolymers) made of halloysite and volcanic glass for the immobilisation of tailings from gold extraction in Ecuador

Applied Clay Science, 2015

Research paper thumbnail of Waste Derived Sorbents and Their Potential Roles in Heavy Metal Remediation Applications

E3S Web of Conferences, 2013

ABSTRACT Inorganic waste materials that have the suitable inherent characteristics could be used ... more ABSTRACT Inorganic waste materials that have the suitable inherent characteristics could be used as precursors for the synthesis of micro-and mesoporous materials, which present great potential to be re-utilized as sorbent materials for heavy metal remediation. Three inorganic waste materials were studied in the present work: water treatment residuals (WTRs) from an integrated drinking water/wastewater treatment plant, and fly ash and bottom ash samples from a municipal solid waste incinerator (MSWI). These wastes were converted into three sorbent materials: ferrihydrite-like materials derived from drying of WTRs, hydroxyapatite-like material derived from ultrasound assisted synthesis of MSWI fly ash with phosphoric acid solution, and a zeolitic material derived from alkaline hydrothermal conversion of MSWI bottom ash. The performance of these materials, as well as their equivalent commercially available counterparts, was assessed for the adsorption of multiple heavy metals (As, Cd, Co, Ni, Pb, Zn) from synthetic solutions, contaminated sediments and surface waters; and satisfactory results were obtained. In addition, it was observed that the combination of sorbents into sorbent mixtures enhanced the performance levels and, where applicable, stabilized inherently mobile contaminants from the waste derived sorbents.

Research paper thumbnail of Dredged sediments as a resource for brick production: Possibilities and barriers from a consumers’ perspective

Waste Management, 2015

A possible solution for the oversupply of dredged sediments is their use as a raw material in bri... more A possible solution for the oversupply of dredged sediments is their use as a raw material in brick production. Despite the fact that several examples (e.g., Agostini et al., 2007; Hamer and Karius, 2002; Xu et al., 2014) show that this application is feasible, some economic, technical and social limitations interfere with the development of a market of dredged materials in brick production in Flanders. While we describe the main characteristics of the supply side, we focus on the limitations and barriers from the demand side in the present study. Based on a consumers survey we analyze consumers&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; risk perceptions and attitudes towards bricks produced from dredged sediments. Consumers in Flanders are rather suspicious with respect to bricks produced from dredged sediments and their risk perception is mainly determined by the possibility of a bad bargain (brick of inferior quality) and the connotation with chemical contamination. The willingness to pay for bricks made from dredged sediments is mainly influenced by the age of the respondents, as well environmental awareness, and the respondents&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; belief in their ability to influence environmental problems. Sensitization and information of customers seems to be of primary importance to make dredged-sediment-derived bricks a successful product.

Research paper thumbnail of Heavy Metal Behaviour in Overbank Sediments and Associated Soils

Acta hydrochimica et hydrobiologica, 2005

Research paper thumbnail of COMBINATION OF LEACHING TESTS AND MINERALOGICAL CHARACTERISATION TO ASSESS INORGANIC CONTAMINANT MOBILITY IN BLASTED COPPER SLAG

Research paper thumbnail of Ph. D. FLASH PRESENTATIONS SESSIONS

Research paper thumbnail of E (co) nergy

Research paper thumbnail of Paper: SEDIMENT CHARACTERIZATION DURING OXIDATION AND RIPENING AND EVALUATION OF ITS POTENTIAL REUSE

Research paper thumbnail of JOURNAL OF MANAGEMENT & ORGANIZATION

Research paper thumbnail of The speciation of heavy metals and arsenic in contaminated soils: some case studies

Research paper thumbnail of Heavy metal speciation in alluvial sediments of the Grote Beek river: A multidisciplinary approach

Research paper thumbnail of Risk assessment of heavy metal pollution in alluvial soils and sediments of the Grote Beek river (Belgium)

Research paper thumbnail of Assessment of heavy metal and As behaviour in contaminated soils by pHstat leaching