Searched for: subject:"Leaching"
(1 - 20 of 24)

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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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Keulen, A. (author), van Zomeren, A. (author), Dijkstra, J.J. (author)
This study explores the leaching of oxyanionic metalloid species (As, Mo, Se, V and Cr) from alkali activated slag-fly ash materials (AAM), dependent on various mixture parameters i.e., activator molarity, slag-fly ash precursor/binder compositions, liquid to binder ratio, curing time and strength. The analyses focusses on the leaching of...
article 2018
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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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Fraters, D. (author), Boom, G.J.F.L. (author), Boumans, L.J.M. (author), de Weerd, H. (author), Wolters, M. (author)
The solute concentration in the subsoil beneath the root zone is an important parameter for leaching assessment. Drainage centrifugation is considered a simple and straightforward method of determining soil solution chemistry. Although several studies have been carried out to determine whether this method is robust, hardly any results are...
article 2017
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Burello, E. (author), Worth, A.P. (author)
article 2015
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van Soestbergen, M. (author), Baukh, V. (author), Erich, S.J.F. (author), Huinink, H.P. (author), Adan, O.C.G. (author)
Carcinogenic chromates are phased out as corrosion inhibitors in organic coatings, and are replaced by benign alternatives. Cerium-based compounds are excellent corrosion inhibitors in an aqueous environment. However, whether they are effective as corrosion inhibitor in an organic coating also depends on their interaction with the coating matrix...
article 2014
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Goodes, L.R. (author), Dennington, S.P. (author), Schuppe, H. (author), Wharton, J.A. (author), Bakker, M. (author), Klijnstra, J.W. (author), Stokes, K.R. (author)
A test matrix of antifouling (AF) coatings including pMMA, an erodible binder and a novel trityl copolymer incorporating Cu 2O and a furan derivative (FD) natural product, were subjected to pontoon immersion and accelerated rotor tests. Fluorescence and optical microscopy techniques were applied to these coatings for quantification of organic...
article 2012
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van Geer, F. (author), Rozemeijer, J. (author), van der Velde, Y. (author), Broers, H.P. (author), de Rooij, G. (author)
As part of two PhD projects, we installed ion-selective electrodes and passive samplers for monitoring nitrate concentrations in a 7 km 2 catchment and compared the results to grab samples. We also monitored nitrate concentrations at the catchment outlet. We tested the effectiveness of these monitoring approaches to estimate the long-term...
conference paper 2011
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Steudel, A. (author), Batenburg, L.F. (author), Fischer, H.R. (author), Weidler, P.G. (author), Emmerich, K. (author), TNO Industrie en Techniek (author)
The bulk material of six dioctahedral and two trioctahedral swellable clay minerals was leached in H2SO4 and HCl at concentrations of 1.0, 5.0 and 10.0 M at 80 °C for several hours. Alteration of the clay mineral structures was dependent on the individual character of each mineral (chemical composition and initial particle size). Acid attack...
article 2009
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Slaghek, T.M. (author), Timmermans, J. (author), Jetten, J.M. (author), TNO Kwaliteit van Leven (author)
TNO has created a 'release on demand' technology in which matrix particles are formed from biopolymers crosslinked into a three-dimensional network. The particles release compounds only when triggered by stimuli such as temperature, pH, humidity or certain bacterial metabolites. This gives efficient use of active ingredients and prevents...
article 2008
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van der Grift, B. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
Historic emissions from ore smelters typically cause regional soil contamination. We developed a modelling approach to assess the impact of such contamination on groundwater and surface water load, coupling unsaturated zone leaching modelling with 3D groundwater transport modelling. Both historic and predictive modelling were performed, using a...
article 2008
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Huisman, D.J. (author), Pols, S. (author), Joosten, I. (author), van Os, B.J.H. (author), Smit, A. (author), TNO Bouw en Ondergrond (author)
A group of Roman glass objects from the Bocholtz burial in the SW of Limburg (The Netherlands) was found to have been subject to varying degrees of degradation. Many of the 25 colourless glass objects were fragmented to pieces <0.1 cm ("sugared"), whereas the three transparent blue-green glass objects were in near-pristine state. Analyses using...
article 2008
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Brink, C.v.d. (author), Zaadnoordijk, W.J. (author), Burgers, S. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
Groundwater quality management relies more and more on models in recent years. These models are used to predict the risk of groundwater contamination for various land uses. This paper presents an assessment of uncertainties and sensitivities to input parameters for a regional model. The model had been set up to improve and facilitate the...
article 2008
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van Gijlswijk, R.N. (author), Korenromp, R.H.J. (author), TNO Milieu, Energie en Procesinnovatie (author)
report 2003
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Erisman, J.W. (author), Vermeulen, A.T. (author), Draaijers, G.P.J. (author), Bleeker, A. (author), de Vries, W. (author), van der Salm, C. (author), Reinds, G.J. (author), Lakkenborg Kristensen, H. (author), Gundersen, P. (author), Energieonderzoek Centrum Nederland (author)
This report describes the work done within the project
report 2002
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Hoede, D. (author), van der Sloot, H.A. (author), Rietra, R.P.J.J. (author), Stenger, R. (author), Lang, Th. (author), Schneider, M. (author), Spanka, G. (author), Stoltenberg-Hansson, A. (author), Lerat, A. (author), Energieonderzoek Centrum Nederland (author)
Regulations such as the European Construction Products Directive (CPD)or national Drinking Water Standards contain provisions to exclude or minimise adverse effects on environment or public hygiene through the use of construction materials. The assessment of the
report 2001
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Hoede, D. (author), van der Sloot, H.A. (author), Rietra, R.P.J.J. (author), Energieonderzoek Centrum Nederland (author)
In the framework of EU project
report 2001
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Hoede, D. (author), van der Sloot, H.A. (author), Rietra, R.P.J.J. (author), Dijkstra, J.J. (author), Energieonderzoek Centrum Nederland (author)
Upon the request of the Israeli National Coal Board the Cr speciation in Israeli coal fly ashes was evaluted. Six fly ashes - fresh ash, fly ash used in road application and fly ash collected from an embankment were tested. For this purpose, the ash leaching behaviour has been characterized as a function of the pH in a so-called pH dependence...
report 2001
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van der Sloot, H.A. (author), Cnubben, P.A.J.P. (author), Energieonderzoek Centrum Nederland (author)
report 2000
Searched for: subject:"Leaching"
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