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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)Purpose: This study evaluates the potential of biomass ash as raw clinker material and the influence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods: A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO2 ratio and burnability) are established. A large dataset was collected and the...article 2021
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van Zomeren, A. (author), Koper, R. (author), Dijkstra, J.J. (author), Comans, R.N.J. (author)Analysis of dissolved organic carbon (DOC) is widely used to quantify the sum of organic carbon species in water. Analyzers based on wet chemical oxidation (WCO) usually have a relatively low detection limit (±1 μg of C/L) and are, therefore, well suited for analyses of DOC in environmental samples (e.g., surface water, groundwater, or seawater)...article 2021
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)This study evaluates the potential of biomass ash as raw clinker material and the infuence of biomass feedstock and thermal conversion technology on biomass ash properties. Methods: A set of criteria for biomass feedstock and ash properties (i.e. CaO/SiO2 ratio and burnability) are established. A large dataset was collected and the best...article 2021
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- Vink, J.P.M. (author), Comans, R.N.J. (author), Dijkstra, J.J. (author), Lamers, L.P.M. (author) article 2020
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Damgaard, A. (author), Comans, R.N.J. (author)In this study, we performed a life cycle assessment of the reuse of biomass fly ash as secondary cementitious material in cement mortars as alternative to a reference landfill scenario of the ash. Since biomass ash does contain enhanced levels of elements that are of potential concern for the environment or human exposure, the performed Life...article 2019
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Dijkstra, J.J. (author), Comans, R.N.J. (author)The pH-dependent availability and leaching of major and trace elements was investigated for a wide range of biomass ash from different fuels and conversion technologies. A technical and environmental assessment of selected biomass ash for application in soil or cement mortars was performed, using both the total content and leaching of elements....article 2019
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Dijkstra, J.J. (author), Comans, R.N.J. (author), Schokker, J. (author), van der Meulen, M.J. (author)Industrial wastes and by-products are increasingly (re-)used as filling material in constructions. To enhance awareness among the geological community of the growing and widespread occurrence of deposits that contain these “novel anthropogenic materials”, this paper reviews three volumetrically important materials: (1) ash remaining from the...article 2019
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Tosti, L. (author), van Zomeren, A. (author), Pels, J.R. (author), Comans, R.N.J. (author)This study evaluated the mechanical and environmental properties of cement mortars containing fly ash from biomass combustion as a secondary cementitious material. Cement mortars with 20 and 40% wt. replacement of Portland cement with fly ash from two types of installations were tested for their compressive strength and leaching behaviour....article 2018
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van Zomeren, A. (author), Comans, R.N.J. (author), Buurman, P. (author), Kalbitz, K. (author), Vidal-Torrado, P. (author), | Schellekens, J. (author), Cerli, C. (author)"Insight in the molecular structure of humic acid(HA) and fulvic acid (FA) can contribute to identify relationships between their molecular properties, and further our quantitative abilities to model important organic matter functions such as metal complexation and association with mineral surfaces. Pyrolysis gas chromatography/mass spectrometry...article 2017
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van Zomeren, A. (author), Groenenberg, J.E. (author), Romkens, P.F.A.M. (author), Comans, R.N.J. (author), Rodrigues, S.M. (author)Recently a dilute nitric acid extraction (0.43 M) was adopted by ISO (ISO17586:2016)as standard for extraction of geochemically reactive elements in soil and soil like materials. Here we evaluate the performance of this extraction for a wide range of elements by mechanistic geochemical modeling. Model predictions indicate that the extraction...article 2017
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van Zomeren, A. (author), Dijkstra, J.J. (author), Vink, J.P.M. (author), | Comans, R.N.J. (author)"Simulating the storage of aerobic soils under water, the chemical speciation of heavy metals and arsenic was studied over a long-term reduction period. Time-dynamic and redox-discrete measurements in reactors were used to study geochemical changes. Large kinetic differences in the net-complexation quantities of heavy metals with sul?des was...article 2017
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Dijkstra, J.J. (author), Brand, E. (author), de Nijs, T. (author), | Comans, R.N.J. (author)As part of a more circular economy, current attention on waste is shifting from land?lling towards the prevention, re-use and recycling of waste materials. Although the need for land?lls is decreasing, there are many land?lls around the world that are still operational or at the point of starting the aftercare period. With traditional aftercare...article 2016
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Dijkstra, J.J. (author), Spijker, J. (author), Groenenberg, B.J. (author), Comans, R.N.J. (author), Energieonderzoek Centrum Nederland (author)"Since the industrial revolution, Dutch soils have gradually been diffusely contaminated by human activities like industry, agriculture and road traffic. Nevertheless, most soils comply with the threshold levels of the Dutch Soil Quality Decree. However, in the long term (several hundreds of years) underneath (diffusely) contaminated soils the...report 2015
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van Zomeren, A. (author), Dijkstra, J.J. (author), Meeussen, J.C.L. (author), Comans, R.N.J. (author)ECN Project for IWM – contents and goal “Impact assessment”: from test result to release criteria using geochemical models Example for Construction products in the Dutch Soil Quality Decree (SQD) Currently also involved in emission criteria for sustainable landfills, dredged sediments, contaminated soils in deep lakes. How can we use these...public lecture 2015
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van Zomeren, A. (author), Dijkstra, J.J. (author), comans, R.N.J. (author), Brand, E. (author), Scharff, H. (author), Energieonderzoek Centrum Nederland (author)Landfill regulations with respect to ending aftercare often mention that no threat to human health and the environment should remain. This statement needs to be translated into emission criteria for which compliance can be demonstrated before competent authorities can decide on ending aftercare. Various approaches are proposed or under...conference paper 2015
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van Zomeren, A. (author), Dijkstra, J.J. (author), Comans, R.N.J. (author), Groenenberg, B.-J. (author), Energieonderzoek Centrum Nederland (author)Geochemical modelling is increasingly being used in the characterization and environmental risk assessment of contaminated materials that are produced and/or applied in urban areas. While geochemical models are mostly developed and tested for specific types of materials, their performance is strongly determined by the specific modelling approach...conference paper 2015
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van Zomeren, A. (author), Scharff, H. (author), Dijkstra, J.J. (author), Meeussen, J.C.L. (author), van der Sloot, H.A. (author), comans, R.N.J. (author)In this chapter, geochemical speciation modelling is used to determine important chemical processes that determine the release of contaminants from waste materials in short and long term. Moreover, model calculations are performed to show the sensitivity of the waste mixture to changes in the contaminant availability and binding capacity by...bookPart 2014
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van Zomeren, A. (author), Dijkstra, J.J. (author), Koper, R. (author), Comans, R.N.J. (author)Environmental limit values for emissions to soil and groundwater ?Dutch Soil Quality Decree (2007) Validate assumptions on HA/FA concentrations in modelling Rapid batch method available: consistent with IHSS methods, suitable for both solid and aqueous samples Change DOC analyses from “combustion method” to “chemical oxidation method”public lecture 2014
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van Zomeren, A. (author), Dijkstra, J.J. (author), comans, R.N.J. (author), Energieonderzoek Centrum Nederland (author)Geochemical modelling is increasingly being used in both scientific research and environmental risk assessment of contaminated materials. In this presentation an overview will be given of the development of a generic multi-surface geochemical modelling approach, to describe the speciation and solid/liquid partitioning (leaching) of major and...conference paper 2014
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van Zomeren, A. (author), Dijkstra, J.J. (author), comans, R.N.J. (author), Energieonderzoek Centrum Nederland (author)Geochemical modelling is increasingly being used in both scientific research and risk assessment regarding the environmental properties of contaminated materials. The performance and reliability of model predictions are strongly determined by the specific modelling approach, as well as by the applied methodologies to estimate the necessary model...conference paper 2014