Hans van der Sloot

Consultant – Hans van der Sloot Consultancy

Email: hans@vanderslootconsultancy.nl


B.S. Chemistry – Free University, Amsterdam, The Netherlands, 1968

M.S., Chemistry and Biochemistry – Free University, Amsterdam, The Netherlands, 1971

Ph.D., Chemistry and Biochemistry – Free University, Amsterdam, The Netherlands, 1976

Research Interests and Expertise

Leaching assessment and methods (including waste form performance), environmental performance of cementitious materials, (contaminated) soil, sludge and waste, nuclear and chemical waste, environmental remediation, management of residuals from energy production and waste to energy facilities, multi-element geochemical modeling of cementitious products, soil, sludge and waste systems. Relationship between laboratory, lysimeter and field scale testing in combination with geochemical modeling as basis for long term prediction of release.

Brief Biography

Dr. van der Sloot held different positions in the Netherlands Energy Research Foundation (ECN, Petten, The Netherlands) until December 2009. After retiring from ECN he started his private consultancy.

He has been involved in standardization of leaching tests for waste, soil and construction products at national and international level (CEN, ISO, US EPA). He is Associate editor for Waste Management. He is a board member of the International Waste Working Group (IWWG) and active in developing a decision support tool for environmental impact assessment (LeachXS) in cooperation with ECN (Petten, The Netherlands), Vanderbilt University (Nashville, USA) and DHI (Hørsholm, Denmark)

In cooperation with partners in the Cement Barriers Partnership under the sponsorship of the Consortium for Risk Evaluation with Stakeholder Participation (CRESP) and coordination by Vanderbilt University, he has been involved in nuclear waste studies with the emphasis on testing and modeling of the source term for contaminant release from disposal facilities to soil and groundwater.

His research and his standardization activities in collaboration with Vanderbilt University on leaching of contaminants from wastes and construction materials has been providing the foundation for environmental regulation of these materials by the Netherlands Ministry of Environment , at USEPA and the European Union’s Directorate General for the Environment.

CRESP Projects

  • Cementitious Barriers Partnership
  • Leaching Assessment for Alternative Waste Forms


K.G. Brown, D.S. Kosson, H.A. van der Sloot, P. Seignette, and J.C.L. Meeussen. Software Quality Assurance for LeachXS/ORCHESTRA as a Tool for Assessment of Waste Management Systems Performance. WM2017 Conference, March 5-9, 2017, Phoenix, Arizona, USA.

H.A. van der Sloot, D.S. Kosson, N. Impens, N. Vanhoudt, Talal Almahayni, H. Vandenhove, L. Sweeck, R. Wiegers, J.L. Provis, C. Gasco ´, W. Schroeyers  (2017)  Leaching assessment as a component of environmental safety and durability analyses for NORM containing building materials.  In: Naturally Occurring Radioactive Materials in Construction – Integrating Radiation Protection in Reuse (COST Action Tu1301 NORM4BUILDING) 2017.  Ed. Wouter Schroeyers. Woodhead Publishing Series in Civil and Structural Engineering. Duxford, UK. ISBN: 9780081020098

David S. Kosson , Andrew C. Garrabrants, Rossane DeLapp, Hans A. van der Sloot. pH-dependent leaching of constituents of potential concern from concrete materials containing coal combustion fly ash. Chemosphere 103 (2014) 140–147. doi: 10.1016/j.chemosphere.2013.11.049. Epub 2013 Dec 19.

Andrew C. Garrabrants, David S. Kosson, Rossane DeLapp, Hans A. van der Sloot. Effect of coal combustion fly ash use in concrete on the mass transport release of constituents of potential concern. Chemosphere 103 (2014) 131–139.  doi: 10.1016/j.chemosphere.2013.11.048. Epub 2013 Dec 19.

D.S. Kosson, H.A. van der Sloot, A.C. Garrabrants and P.F.A.B. Seignette (2014). Leaching Test Relationships, Laboratory-to-Field Comparisons and Recommendations for Leaching Evaluation using the Leaching Environmental Assessment Framework (LEAF) EPA-600/R-14/061.

Arnold, .J, Kosson, D.S., Brown, K.G., Meeussen, J.C.L. and van der Sloot, H.A. (2013). Characterization and modeling of major constituent equilibrium chemistry of a blended cement mortar. EPJ Web of Conferences, 56, 01004 (2013).

Brown, K.G., Arnold, J., Sarkar, S., Flach, G., van der Sloot, H.A., Meeussen, J.C.L. and Kosson, D.S. (2013). Modeling carbonation of high-level waste tank integrity and closure.  EPJ Web of Conferences, 56 (2013) 05003.

Van der Sloot, H. A. and Kosson, D.S. (2012) Use of characterisation leaching tests and associated modelling tools in assessing the hazardous nature of wastes. Journal of Hazardous Materials 207–208 (2012) 36–43. doi: 10.1016/j.jhazmat.2011.03.119. Epub 2011 Apr 8.

Sarkar, S., Kosson, D.S., Mahadevan, S., Meeussen, J.C.L, van der Sloot, H.A, Arnold, J.R. and Brown, KG. (2012). Bayesian calibration of thermodynamic parameters for geochemical speciation modeling of cementitious materials.  Cement and Concrete Research, 42:889-902. DOI: 10.1016/j.cemconres.2012.02.004

Sarkar, S., Mahadevan, S., Meeussen, J.C.L., van der Sloot, H.A. and Kosson, D.S. (2012).  Sensitivity analysis of damage in cement materials under sulfate attack and calcium leaching.
J. of Materials in Civil Engineering,
24(4):430-440. DOI: 10.1061/(ASCE)MT.1943-5533.0000407

Van der Sloot, H.A., van Zomeren. (2012) Characterisation Leaching Tests and Associated Geochemical Speciation Modelling to Assess Long Term Release Behaviour from Extractive Wastes. Mine Water and the Environment. Mine Water Environ 31:92–103. DOI: 10.1007/s10230-012-0182-8

Engelsen CJ, van der Sloot HA, Wibetoe G, Justnes H, Lund W, Stoltenberg-Hansson E. (2010) Leaching characterisation and geochemical modelling of minor and trace elements released from recycled concrete aggregates. Cement and Concrete Research; 40: 1639-1649. DOI: 10.1016/j.cemconres.2010.08.001

Van der Sloot, H. A., van Zomeren, A., Meeussen, J. C. L., Seignette, P., Bleijerveld, R., 2007. Interpretation of test method selection, validation against field data, and predictive modelling for impact evaluation of stabilised waste disposal. Journal of Hazardous Materials 141, 354-369. doi:10.1016/j.jhazmat.2006.05.106

Van der Sloot, H.A. (2000) Comparison of the characteristic leaching behaviour of cements using standard (EN 196-1) cement-mortar and an assessment of their long-term environmental behaviour in construction products during service life and recycling. Cement & Concrete Research 30, 1079 – 1096. DOI: 10.1016/S0008-8846(00)00287-8


ISCOWA Award 1997. Award issued at the 3rd WASCON conference “ Putting Theory into Practice” held in Houthem, The Netherlands,  June 4-6, 1997 for most significant contribution to the development in the field of environmental aspects of reuse of waste materials in construction.

Best paper in Applied Geochemistry for 2006 – pH dependence test applied to incinerator bottom ash

Best paper in Mine Water and the Environment for the year 2012

Selected Synergistic Activities

  1. CEN/TC351, convenor of Working Group 5 on content and analysis methods for construction products and member of Working Group 1 on leach test methods for construction products.
  2. Member of CEN/TC444 Environmental Characterization (Formerly CEN/TC292; from 1993) .
  3. Chairman of Dutch standardization committee on Leaching, NEN, Delft (since 1982)
  4. Chairman of the CEN/TC 292 (Waste Characterization) Working Group 6 Leaching (1993 – 2014)
  5. Chairman of ISO TC 190 (Soil) Working Group 6 on Leaching (1997 – 2011)
  6. Co-developer of LeachXS
  7. Associate editor for Waste Management (1998 – 2018)


Vanderbilt: D. S. Kosson, K. Brown, A. Garrabrants
Energy Research Center of The Netherlands: P. Seignette, A. van Zomeren, J.J. Dijkstra, J.C.L. Meeussen

University of Padua: R. Cossu

Other Universities and Research Centers:  Pinjing He (Tongji University), Jianguo Lui (Tsinghua University)

Graduate Student Advisees – Vanderbilt University

Graduate Students Advised (Ph.D. 6 completed, 1 in progress): Jing-Jing Bu (2018), Janelle Branch (2017), Josh Arnold (2014), Sohini Sarkar (2010), Sarynna Lopez Mesa (2006), Mojca Loncnar (2014), Christian Engelsen (2012)

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