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Heimovaara, T.J. (author), Gebert, J. (author), Kanen, A.C. (author), Meza Ramos, P.N. (author)In-situ stabilization of waste bodies can be achieved by the infiltration of water or recirculation of leachate into the landfill, which is thought to enhance the microbial degradation of waste organics by (re-)moisturizing dry zones and flushing out metabolic products of organic matter decay. The success of in-situ stabilization should reflect...conference paper 2023
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Andrade Corona, C.F. (author), Dieudonné, A.A.M. (author), Gebert, J. (author), Heimovaara, T.J. (author)Nitrogen undergoes multiple biogeochemical transformations during waste degradation, which depend on speciation, prevailing geochemical boundary conditions, and waste surface properties. This study developed a waste biodegradation model with high flexibility in accommodating reaction pathways to assess different process dynamics. The model was...conference paper 2023
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Kortleve, Anniek J. (author), Mogollón, José M. (author), Heimovaara, T.J. (author), Gebert, J. (author)Urbanization influences soil carbon (C) stocks and flows, which, in turn, affect soil-derived ecosystem services. This paper explores soil C storage in urban greenspaces in the Dutch city of The Hague along a transect from the suburban seaside towards the city centre, reflecting a toposequence from dune to peaty inland soils. C storage and C...journal article 2022
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Meza Ramos, P.N. (author), Lammen, Hans (author), Cruz, Carmen (author), Heimovaara, T.J. (author), Gebert, J. (author)In-situ aeration of landfills accelerates biodegradation of waste organic matter and hence advances waste stabilization. The spatial outreach of aeration greatly affects stabilization efficiency. This study analyzed the spatial variability of gas composition and flow in 230 wells spread over four compartments of a Dutch landfill which is...journal article 2022
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Zander, F. (author), Groengroeft, A. (author), Eschenbach, A. (author), Heimovaara, T.J. (author), Gebert, J. (author)Anaerobic sediment organic matter decay generates methane, delays sediment consolidation, reduces sediment density, viscosity and shear strength, all impacting the sediment rheological parameters and the navigable depth. This study quantifies the share of anaerobically and aerobically degradable sediment organic matter (SOM) in a depth...journal article 2022
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Zhou, Jianchao (author), Laumann, S.J. (author), Heimovaara, T.J. (author)This study presents a novel geotechnical engineering approach that utilizes naturally occurring processes to reduce soil permeability in-situ. This approach is inspired by a soil stratification process (Podzolization), where a low permeability layer is formed by metal-organic matter precipitates. In a field experiment, a direct aluminum...journal article 2022
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Wijdeveld, Arjan J. (author), Schipper, Cor A. (author), Heimovaara, T.J. (author)Abstract: The use of sediments as soils is an area of interest for Beneficial Use of dredged sediments. In this study the impact of the transition from sediments to soils is researched by looking at the seasonal and long year (10 year) change in pore water metal chemistry of sediments which are considered clean (class A) according to the...journal article 2022
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Chavez Olalla, J.F. (author), Winkels, T. G. (author), Ngan-Tillard, D.J.M. (author), Heimovaara, T.J. (author)The geometric variability of soil layers is a large source of uncertainty in the reliability assessment of dikes. Because direct samples of the subsurface soils are often insufficient to capture the complexity of the subsurface, geophysical methods provide a powerful source of complementary information. A combined approach to estimate the...journal article 2021
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Zander, F. (author), Heimovaara, T.J. (author), Gebert, J. (author)Purpose: The microbial turnover of sediment organic matter (OM) in ports and waterways impacts water quality, sonic depth finding and presumably also rheological properties as well as greenhouse gas emissions, especially if organic carbon is released as methane. As a consequence, sediment management practices as a whole are affected. This...journal article 2020
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van Turnhout, A.G. (author), Oonk, Hans (author), Scharff, Heijo (author), Heimovaara, T.J. (author)In order to reduce the environmental and financial burden for future generations, approaches are needed to shorten aftercare of landfills. Aeration of the waste-body is a promising approach, however, the poor understanding of transport of gas and water through a waste-body makes it difficult to design an effective aeration strategy. The aim of...journal article 2020
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Zhou, Jianchao (author), Laumann, S.J. (author), Heimovaara, T.J. (author)Using naturally occurring processes to modify the engineering properties of the subsurface has received increasing attention from industry and research communities as they aid in the development of cost-effective, robust and sustainable engineering technologies. In line with this trend, we propose to use precipitates of aluminum (Al) and organic...journal article 2019
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Thouement, H.A.A. (author), Kuder, Tomasz (author), Heimovaara, T.J. (author), van Breukelen, B.M. (author)Back-diffusion of chlorinated ethenes (CEs) from low-permeability layers (LPLs) causes contaminant persistence long after the primary spill zones have disappeared. Naturally occurring degradation in LPLs lowers remediation time frames, but its assessment through sediment sampling is prohibitive in conventional remediation projects. Scenario...journal article 2019
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Pham, P.V. (author), van Paassen, L.A. (author), van der Star, Wouter R.L. (author), Heimovaara, T.J. (author)Microbially induced carbonate precipitation (MICP) through denitrification can potentially be applied as a bio-based ground improvement technique. Two strategies involving multiple batch treatments in a modified triaxial test setup were used to study the process efficiency. Both strategies aim to achieve 1 weight percentage (% by weight) of...journal article 2018
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Wijdeveld, A.J. (author), Schipper, C. A. (author), Heimovaara, T.J. (author)In this study the spatial distribution of dissolved metals in surface water is studied at nine locations in Lake Ketelmeer (the Netherlands). The measured dissolved metal concentrations are combined with the local water quality parameters for salinity, pH, alkalinity and DOC to calculate a FIAM Free Ion Activity Model (FIAM) and the Biotic...journal article 2018
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van Turnhout, A.G. (author), Brandstätter, Christian (author), Kleerebezem, R. (author), Fellner, Johann (author), Heimovaara, T.J. (author)Long-term emissions of Municipal Solid Waste (MSW) landfills are a burden for future generations because of the required long-term aftercare. To shorten aftercare, treatment methods have to be developed that reduce long-term emissions. A treatment method that reduces emissions at a lysimeter scale is re-circulation of leachate. However, its...journal article 2018
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Konstantaki, L.A. (author), Ghose, R. (author), Draganov, D.S. (author), Heimovaara, T.J. (author)The knowledge of the distribution of leachate and gas in a municipal landfill is of vital importance to the landfill operators performing improved landfill treatments and for environmental protection and efficient biogas extraction. We have explored the potential of using the velocity fields of seismic S- and P-waves to delineate the wet and...journal article 2016
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van Turnhout, A.G. (author), Kleerebezem, R. (author), Heimovaara, T.J. (author)Reliable prediction of the long-term behavior of environmental systems such as Municipal Solid Waste (MSW) landfills is challenging. While many driving forces influence this behavior, characterization of them is limited by measurement techniques. Therefore, a model structure for reliable prediction needs to optimally combine all measured...journal article 2016
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Laumann, S.J. (author), Zhou, Jianchao (author), Heimovaara, T.J. (author)The utilization of natural processes for engineering purposes has been widely discussed in recent years since they might enable the development of cost-effective, robust and environmentally compatible engineering technologies. Biomineralization is one of the many possible biogeochemical processes that is currently investigated in detail. We...abstract 2016
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Pham, P.V. (author), Nakano, A. (author), van der Star, WRL (author), Heimovaara, T.J. (author), van Paassen, L.A. (author)The process of microbially induced carbonate precipitation (MICP) by denitrification was investigated in relation to its potential use as a ground improvement method. Liquid batch experiments indicated that the substrate solution had an optimum carbon–nitrogen ratio of 1·6 and confirmed that combining nitrate reduction and calcium carbonate...journal article 2016
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- Afanasyev, M. (author), Huisman, H. (author), Van Paassen, L.A. (author), Heimovaara, T.J. (author) conference paper 2015