A selection of publications


Appelo, C.A.J., 2017. Solute transport solved with the Nernst-Planck equation for concrete pores with 'free' water and a double layer. Cem. Concr. Res. 101, 102-113. (Ask Tony Appelo for a reprint)


Appelo, C.A.J., 2015. Principles, caveats and improvements in databases for calculating hydrogeochemical reactions in saline waters from 0 to 200 °C and 1 to 1000 atm. Appl. Geochem. 55, 62-71. (Ask Tony Appelo for a reprint) (reprint contains the appendix)


Appelo, C.A.J., Parkhurst, D.L. and Post, V.E.A., 2014. Equations for calculating hydrogeochemical reactions of minerals and gases such as CO2 at high pressures and temperatures. Geochim. Cosmochim. Acta 125, 49-67. (Ask Tony Appelo for a reprint)


Beekman, H.E., Eggenkamp, H.G.M. and Appelo, C.A.J., 2011. An integrated modelling approach to reconstruct complex solute transport mechanisms - Cl and δ37Cl in pore water of sediments from a former brackish lagoon in The Netherlands. Applied Geochemistry 26, 257-268. (Ask Hans Beekman for a reprint)

Tournassat, C. and Appelo, C.A.J., 2011. Modelling approaches for anion-exclusion in compacted Na-bentonite. Geochimica et Cosmochimica Acta 75, 3698-3710. (Ask Christophe Tournassat for a reprint)


Appelo, C.A.J. and Rolle, M., 2010. [Review] PHT3D: A reactive multicomponent transport model for saturated porous media, Ground Water 48, p. 627-632. (717 kb pdf)

Appelo, C.A.J., Van Loon, L.R. and Wersin, P., 2010. Multicomponent diffusion of a suite of tracers (HTO, Cl, Br, I, Na, Sr, Cs) in a single sample of Opalinus Clay. Geochim. Cosmochim. Acta 74, 1201-1219. (Ask Tony Appelo for a reprint)


Appelo, C.A.J., Vinsot, A., Mettler, S. and Wechner, S., 2008. Obtaining the porewater composition of a clay rock by modeling the in- and out-diffusion of anions and cations from an in-situ experiment. J. Contam. Hydrol. 101, 67-76. (Ask Tony Appelo for a reprint)

Vinsot, A., Appelo, C.A.J., Cailteau, C., Wechner, S., Pironon, J., De Donato, P., De Cannière P., Mettler, S., Wersin, P. and Gäbler, H.-E., 2008. CO2 data on gas and pore water sampled in situ in the Opalinus Clay at the Mont Terri rock laboratory. Phys. Chem. Earth 33, 554-560. (Ask Agnes Vinsot for a reprint)

Appelo, C.A.J., 2008. Geochemical experimentation and modeling are tools for understanding the origin of As in groundwater in Bangladesh and elsewhere. In: Arsenic in groundwater - A world problem, NNC-IAH Pub. 5, 33-50.


Appelo, C.A.J. and Wersin, P., 2007. Multicomponent diffusion modeling in clay systems with application to the diffusion of Tritium, Iodide, and Sodium in Opalinus Clay. Environ. Sci. Technol. 41, 5002-5007. DOI: 10.1021/es0629256 (Ask Tony Appelo for a reprint)

Charlet, L., Chakraborty, S., Appelo, C.A.J., Roman-Ross, G., Nath, B., Ansari, A.A., Lanson, M., Chatterjee, D., Mallik, S.B., 2007. Chemodynamics of an Arsenic “hotspot” in a West Bengal aquifer: A field and reactive transport modeling study, Applied Geochemistry, DOI: 10.1016/j.apgeochem.2006.12.022 (Ask Laurent Charlet for a reprint)

Appelo, C.A.J., 2007. Multicomponent diffusion in clays. In: Water pollution in natural porous media; Candela, L., Vadillo, I., Aagaard, P., et al., Eds.; Instituto Geológico de España: Madrid, p. 3-13. (470 kb pdf)


Nowack, B., Mayer, K.U., Oswald, S.E., Van Beinum, W., Appelo, C.A.J., Jacques, D., Seuntjens, P., Gerard, F., Jaillard, B., Schnepf, A. and Roose, T., 2006. Verification and intercomparison of reactive transport codes to describe root-uptake. Plant Soil 285, 305-321. (Ask Bernd Nowack for a reprint)


Wersin, P., Curti, E. and Appelo, C.A.J., 2004. Modelling bentonite-water interactions at high solid/liquid ratios: swelling and diffuse double layer effects. Appl. Clay Sci. 26, 249-257. (Ask Paul Wersin for a reprint)

Appelo, C.A.J. and Dimier, A., 2004. Geochemistry, groundwater and pollution: Learning by modeling. US Fed. Agency Workshop, Albuquerque, NM, p. 1-4. (87 kb pdf)


Appelo, C.A.J., 2003. Calculating the fractionation of isotopes in hydrochemical (transport) processes with PHREEQC-2. in H.D. Schulz and A. Hadeler (eds) GEOPROC 2002, 383-398, Wiley-VCH, Weinheim. (98 kb pdf)

Appelo, C.A.J. and De Vet, W.W.J.M., 2003. Modeling in situ iron removal from groundwater with trace elements such as As. in: A.H. Welch and K.G. Stollenwerk (eds). Arsenic in groundwater. Kluwer Academ., 381-401. (202 kb pdf)


Eckert, P. and Appelo, C.A.J., 2002. Hydrogeochemical modeling of enhanced BTEX-remediation with nitrate. Water Resour. Res. 38, DOI 10.1029/2001WR000692. (Ask Paul Eckert for a reprint)

Appelo, C.A.J., Van der Weiden, M.J.J., Tournassat, C. and Charlet, L., 2002. Surface complexation of ferrous iron and carbonate on ferrihydrite, and the mobilisation of arsenic. Environ. Sci. Technol. 36, 3096-3103. (98 kb pdf)

Appelo, C.A.J. and Parkhurst, D.L., 2002. Calculating cation exchange with PHREEQC (version 2) (42 kb pdf)


Van der Kemp, W., Appelo, C.A.J., Walraevens, K., 2000. Inverse chemical modeling and radiocarbon dating of palaeogroundwaters: the Tertiary Ledo-Paniselian aquifer in Flanders, Belgium. Water Resour. Res., 36, 1277-1287. (530 kb pdf)

Postma, D. and Appelo, C.A.J., 2000. Reduction of Mn-oxides by ferrous iron in a flow system: column experiments and reactive transport modeling. Geochim. Cosmochim. Acta, 64, 1237-1247. (Ask Dieke Postma for a reprint)


Appelo, C.A.J. and Postma, D., 1999. A consistent model for surface complexation on birnessite (δ-MnO2) and its application to a column experiment. Geochim. Cosmochim. Acta 63, 3039-3048. (330 kb pdf)

Appelo, C.A.J. and Postma, D., 1999. Variable dispersivity in a column experiment containing MnO2 and FeOOH coated sand. J. Contam. Hydrol. 40, 95-106. (209 kb pdf)

Parkhurst, D.L. and Appelo, C.A.J., 1999. User's guide to PHREEQC (version 2) - a computer program for speciation, reaction-path, 1D-transport, and inverse geochemical calculations. US Geol. Surv. Water Resour. Inv. Rep. 99-4259, 312p. (Download from David Parkhurst's website)

Appelo, C.A.J., Drijver, B., Hekkenberg, R. and De Jonge, M., 1999. Modeling of in situ iron removal from groundwater. Ground Water 37, 811-817. (237 kb pdf)


Van Breukelen, B.M., Appelo, C.A.J. and Olsthoorn, T.N., 1998. Hydrogeochemical transport modelling of 24 years of Rhine water infiltration in the dunes of the Amsterdam water supply. J. Hydrol. 209, 281-296. (Ask Boris van Breukelen for a reprint)

Van Veldhuizen, M., Hendriks, J.A. and Appelo, C.A.J., 1998. Numerical computation in heterovalent chromatography. Appl. Numer. Mathem. 28, 69-89. (Ask Rien van Veldhuizen for a reprint)
or download the program MIE -- Multicomponent Ion Exchange. (zipped executable with program and paper, 1.2 MB)

Stigter, T.Y., Van Ooijen, S.P.J., Post, V.E.A., Appelo, C.A.J. and Carvalho Dill, A.M.M., 1998. A hydrological and hydrochemical explanation of the groundwater composition under irrigated land in a Mediterranean environment, Algarve, Portugal. J. Hydrol. 208, 262-279. (Ask Tibor Stigter for a reprint)

Appelo, C.A.J. and Parkhurst, D.L., 1998. Enhancements to the geochemical model PHREEQC -1D transport and reaction kinetics. in Water Rock Interaction 9, 873-876, Balkema, Rotterdam.

Appelo, C.A.J., Verweij, E. and Schäfer, H., 1998. A hydrogeochemical transport model for an oxidation experiment with pyrite/calcite/exchangers/organic matter containing sand. Appl. Geochem. 13, 257-268. (1.1 Mb pdf)


Appelo, C.A.J., 1996. Multicomponent ion exchange and chromatography in natural systems. in: P.C. Lichtner, C.I. Steefel and E.H. Oelkers (eds), Reviews in Mineralogy 34, 193-227. (0.91 Mb pdf)


Van Veldhuizen, M., Appelo, C.A.J. and Griffioen, J., 1995. The (least squares) quotient algorithm as a rapid tool for obtaining sorption isotherms from column elution curves. Water Resour. Res., 31, 849-857. (Ask Rien van Veldhuizen for a reprint)


Appelo, C.A.J., 1994. Some calculations on multicomponent transport with cation exchange in aquifers. Ground Water, 32, 968-975. (382 kb pdf)

Appelo, C.A.J., 1994. Cation and proton exchange, pH variations, and carbonate reactions in a freshening aquifer. Water Resour. Res., 30, 2793-2805. (0.76 Mb pdf)


Appelo, C.A.J., Hendriks, J.A. and Van Veldhuizen, M., 1993. Flushing factors and a sharp front solution for solute transport with multicomponent ion exchange. J. Hydrol. 140, 89-113. ( 0.5 Mb pdf)

Griffioen, J. and Appelo, C.A.J., 1993. Adsorption of calcium and its complexes by two sediments in calcium-hydrogen-chlorine-carbon dioxide systems. Soil Sci. Soc. Am. J. 57, 716-722. (Ask Jasper Griffioen for a reprint)

Griffioen, J. and Appelo, C.A.J., 1993. Nature and extent of carbonate precipitation during aquifer thermal energy storage. Applied Geochem. 8, 161-176. (Ask Jasper Griffioen for a reprint)


Griffioen, J., Appelo, C.A.J. and Van Veldhuizen, M., 1992. Practice of chromatography: deriving isotherms from elution curves. Soil Sci. Soc. Am. J. 56, 1429-1436. (Ask Jasper Griffioen for a reprint)

Beekman, H.E., Appelo, C.A.J., Eggenkamp, H.G.M. and Kreulen, R., 1992. 37Cl-35Cl transport modeling in accumulating sediments of a former brackish lagoonal environment. in: Y.K. Kharaka and A.S. Maest (eds) Water-Rock Interaction, Proc. 7th Int. Symp., Park City, Utah, 209-212. (117 kb pdf)

Appelo, C.A.J. and Beekman, H.E., 1992. Hydrochemical modeling of a seawater diffusion profile, Lake Yssel, The Netherlands. in: Y.K. Kharaka and A.S. Maest (eds) Water-Rock Interaction, Proc. 7th Int. Symp., Park City, Utah, 205-208. (118 kb pdf)


Brons, H.E., Griffioen, J., Appelo, C.A.J. and Zehnder, A.J.B., 1991. (Bio)geochemical reactions in aquifer material from a thermal energy storage site. Water Res. 25, 729-736. (Ask Hans Brons for a reprint)


Beekman, H.E. and Appelo, C.A.J., 1990. Ion chromatography of fresh- and salt-water displace­ment: laboratory experiments and multicomponent transport modelling. J. Contam. Hydrol. 7, 21-37. (Ask Hans Beekman for a reprint)

Appelo, C.A.J., Willemsen, A., Beekman, H.E. and Griffioen, J., 1990. Geochemical calcul­ations and observations on salt water intrusions. II Validation of a geochemical model with laboratory experiments. J. Hydrol. 120, 225-250. (0.65 Mb pdf)

Appelo, C.A.J., 1990. Ground water in the Nile delta. Nature 346, 417-418.


Appelo, C.A.J. and Willemsen, A., 1987. Geochemical calculations and observations on salt water intrusions, I. A combined geochemical/mixing cell model. J. Hydrol. 94, 313-330. ( 0.45 Mb pdf )


Herweyer, J.C., Van Luyn, G.A. and Appelo, C.A.J., 1985. Calibra­tion of a mass transport model with environme­ntal tritium. J. Hydrol. 78, 1-17. ( 0.42 Mb pdf)


Appelo, C.A.J., Beekman, H.E. and Oosterbaan, A.W.A., 1984. Hydrochemistry of springs from dolomite reefs in the southern Alps of Northern Italy. in: E. Eriksson (ed.) Hydrochemical Balances of Freshwater Systems, IAHS Publ. 150, p. 125-138. ( 0.34 Mb pdf)


Appelo, C.A.J., R. Becht, A.A. van de Griend and T.C.M. Spierings, 1983. Buildup of discharge along the course of a mountain stream deduced from water quality routings (EC routings). J. Hydrol. 66, 305-318. ( 0.4 Mb pdf )


Appelo, C.A.J., 1977. Chemistry of water expelled from compacting clay layers: a model based on Donnan equilibrium. Chem. Geol. 19, 91-98. ( 0.15 Mb pdf)