Abstract
Clay-solidified grouting curtains are commonly used for remediation by containment or pollution prevention, in addition to their use as a barrier to water flow in municipal solid waste(MSW) landfills. A hydrological model of water flow and a hydrodynamic model of contaminant are presented to simulate the migration of leachate through clay-solidified grouting curtain in MSW landfills, with particular attention paid to the role of diffusive and adsorptive fluxes in contaminant transport. The models were applied to simulate the sensitivity of the curtain’s behavior to changes in parameters, such as thickness, depth, permeability coefficient, diffusion coefficient, resistance coefficient and concentration, and also to demonstrate the contaminant distribution on the evolution of travel time and offset distance of clay-solidified grouting curtain in landfills. It is found that a part of leachate components stays or is retarded in clay-solidified grouting curtain by precipitate or exchange, the retention rate is closely related to composition of clay-solidified grouting curtain, more than 80%, and the maximum occurs at the cementclay ratio of 2 : 4 under experimental conditions. Contamination distribution is variable on travel time and offset distance, the highest concentration takes place where the contamination intensity is nearest to the pollution resource or takes place at early middle period of transport, and the pollutant attenuates gradually. The results indicate that claysolidified grouting curtain with a proper thickness, a low permeability coefficient and a high resistance coefficient might serve as a sufficiently effective vertical barrier against leachate seepage and contamination migration in MSW landfills.
Similar content being viewed by others
References
Erses A S, Fazal M A, Onaya T T, et al. Determination of solid waste sorption capacity for selected heavy metals in landfills [J]. Journal of Hazardous Materials, 2005, 121(1–3): 223–232.
Abollino O, Aceto M, Malandrino M, et al. Adsorption of heavy metals on Na-montmorillonite: Effect of pH and organic substances [J]. Water Research, 2003, 37(7): 1619–1627.
Colebrand International Limited. Sanitary landfill [EB/OL]. http://www.colebrand.com/wastsl.htm, 2005.
KANG Yu, LU An-huai, ZHOU Ping, et al. Adsorption results and discussion of organic pollutant with natural clay in Peking Liulitun Waste Landfill [J]. China Non-metallic Mining Industry Herald, 2003, 32(2): 42–44. (in Chinese)
CHEN Yong-gui, ZHANG Ke-neng, WEI Zhong-chao, et al. Application of swing jet-grouting and clay-solidified grouting on the treatment of seepage[J]. Construction Technique, 2003, 32(1): 41–43. (in Chinese)
CHEN Yong-gui. ZHANG Ke-neng. WEI Zhong-chao, et al. Several problems with the rest of the jet grouted vertical sealing diaphragm-wall enclosure [J]. Exploration Engineering Rock & Soil Drilling and Tunneling, 2003, 29(1): 12–14. (in Chinese)
ZHANG Ke-neng, ZOU Yin-sheng, WANG Yi-sun. Experiment and application of clay-cement slurry in grouting curtain of rubbish-buried site [J]. Journal of Hunan University (Natural Science), 1999, 26(5): 76–80. (in Chinese)
DENG Fei-yue, ZHANG Ke-neng, YANG Ming. Effects of clay-solidified grouting curtain on retard function to pollutants in solid-waste landfill [J]. Journal of Central South University (Natural Science), 2000, 31(6): 524–527. (in Chinese)
Fernandes L, Warith M A, La F F. Modelling of contaminant transport within a marshland environment[J]. Waste Management, 1996, 16(7): 649–661.
ZHANG Ke-neng, TIAN Qin-yu, DENG Fei-yue, et al. Retardation capability of clay-solidified grouting curtain by column test [J]. Journal of Central South University (Natural Science), 2004, 35(3): 73–77. (in Chinese)
KONG De-fang. Conspectus of waste sanitary landfills and its geoenvironmental effects [J]. Geology calamity and environment protect, 1999, 10(S): 1–11. (in Chinese)
Foged N, Baumann J. Clay membrane made of natural high plasticity clay: leachate migration due to advection and diffusion [J]. Engineering Geology, 1999, 54(1–2): 129–137.
WU Guang-xi, LI L Y. Modeling of heavy metal migration in sandrbentonite and the leachate pH effect [J]. Journal of Contaminant Hydrology, 1998, 33(3–4): 313–336.
Howard K W F, Livingstone S. Transport of urban contaminants into Lake Ontario via sub-surface flow [J]. Urban Water, 2000, 2(3): 183–195.
Philip L K. An investigation into contaminant transport processes through single-phase cement-bentonite slurry walls [J]. Engineering Geology, 2001, 60(1–4): 209–221.
Kool J B, Huyakorn P S, Sudicky E A, et al. A composite modeling approach for subsurface transport of degrading contaminants from land-disposal sites [J]. Journal of Contaminant Hydrology, 1994, 17(1): 69–90.
Erses S A, Onay T T. In situ heavy metal attenuation in landfills under methanogenic conditions [J]. Journal of Hazardous Materials, 2003, 99(2): 159–175.
Schlege M L, Charlet L, Manceau A. Sorption of metal ions on clay minerals—II. Mechanism of Co sorption on hectorite at high and low ionic strength and impact on the sorbent stability [J]. Journal of Colloid and Interface Science, 1999, 220(2): 392–405.
Roehl K E, Czurda K. Diffusion and solid speciation of Cd and Pb in clay liners [J]. Applied Clay Science, 1998, 12(5): 387–402.
Yong R N, Yaacob W Z W, Bentley S P, et al. Partitioning of heavy metals on soil samples from leaching column tests [J]. Engineering Geology, 1999, 60(1–4): 307–322.
Author information
Authors and Affiliations
Corresponding author
Additional information
Foundation item: Project(2000-65) supported by the Foundation for University Key Teacher by the Ministry of Education of China
Rights and permissions
About this article
Cite this article
Chen, Yg., Zhang, Kn. & Huang, Cb. Analysis on contaminants transport process through clay-solidified grouting curtain in MSW landfills. J Cent. South Univ. Technol. 12 (Suppl 1), 168–172 (2005). https://doi.org/10.1007/s11771-005-0393-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-005-0393-2