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Environmental Earth Sciences

, 77:636 | Cite as

An experimental study on microstructure of leachate-polluted stabilized clay

  • Juan Hou
  • Hao Li
  • Lei Liu
Original Article

Abstract

Clay-solidified grouting curtain (CSGC) is a new kind of vertical barrier for remediating unregulated waste disposal sites in China that combines vertical-barrier and cement-based solidification-stabilization treatment techniques. The cement, stabilizing agents and landfill leachate clearly influence penetration. Although CSGC is becoming widely used because it is effective and economical, little is known about how it works. There is no clear consensus on the penetration mechanism, especially under actual continuous leachate percolation. The present work, therefore, studies the microstructure of CSGC under actual continuous leachate percolation. The cement and self-development stabilizing agents (CERSM-B) and their combined effect on the cumulative intrusion and pore size distribution were investigated using mercury intrusion porosimetry and scanning electron microscope images. The experimental results demonstrated that the unhydrated cement particles first create a large pore space. With increasing cement content, cementation products fill the large pores, thus decreasing the total pore volume. Fine-needle hydration ettringite crystal and calcium silicate hydrate gels are found when the cement content is below 15%. Stabilizing agents (CERSM-B) play an important role in the microstructure of CSGC. A close structure of flaky crystals with small, infrequent pores can be observed in samples treated with stabilizing agents (CERSM-B). However, adding too many stabilizing agents (CERSM-B) may increase the continuity of macropores. The peak pore size distribution and corresponding pore size increase with increasing dosage of stabilizing agents (CERSM-B). In engineering applications, the recommended range of cement and stabilizing agents (CERSM-B) is 15–20% percent clay and 7.5–10% cement.

Keywords

Landfill leachate Stabilized clay Microstructure Cement Stabilizing agents 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51778353 and 41202215) and the Youth Innovation Promotion Association CAS (2017376), which is gratefully acknowledged.

Supplementary material

12665_2018_7822_MOESM1_ESM.docx (60 kb)
Supplementary material 1 (DOCX 59 KB)
12665_2018_7822_MOESM2_ESM.docx (14 kb)
Supplementary material 2 (DOCX 14 KB)
12665_2018_7822_MOESM3_ESM.docx (14 kb)
Supplementary material 3 (DOCX 14 KB)

References

  1. Aly A (2015) Compressive strength and microstructure of soft clay soil stabilized with recycled basanite. Appl Clay Sci 104:27–35CrossRefGoogle Scholar
  2. Ata AA, Salem TN, Elkhawas NM (2015) Properties of soil-bentonite-cement bypass mixture for cutoff walls. Constr Build Mater 93:950–956CrossRefGoogle Scholar
  3. Chen YG, Zhang KN, Huang CB (2005) Analysis on contaminants transport process through clay-solidified grouting curtain in MSW landfills. J CentralSouth Univ Technol 12:168–172CrossRefGoogle Scholar
  4. Chen YG, Zou YS, Zhang KN (2007) Research and application of clay-solidified grouting in anti-seepage of wastwater reservoir. Mining Res Dev 27:79–81 (in Chinese) Google Scholar
  5. Chen YG, Ye WM, Zhang KN (2011) Factors affecting phenol adsorption on clay-solidified grouting curtain. J CentralSouth Univ Technol 18(3):854–858CrossRefGoogle Scholar
  6. Chen YM, Shi JY, Zhu W, Zhan LT (2012) A review of geoenvironmental engineering. Chin Civil Eng J 45(4):165–182 (in Chinese) Google Scholar
  7. Coz A, Andrés A, Soriano S, Irabien Á (2004) Environmental behaviour of stabilised foundry sludge. J Hazard Mater B109:95–104CrossRefGoogle Scholar
  8. Delage P, Pellerin FM (1984) Influence de la lyophilisationsur la structure d’uneargile sensible du Québec. Clay Miner 19:151–160CrossRefGoogle Scholar
  9. Dietrich K (2002) Bentonites as a basic material for technical base liners and site encapsulation cut-off walls. Appl Clay Sci 21(1–2):1–11Google Scholar
  10. Falciglia PP, Cannata S, Romano S, Vagliasindi FGA (2014) Stabilisation/solidification of radionuclide polluted soils—part I: assessment of setting time, mechanical resistance, γ-radiation shielding and leachate γ-radiation. J Geochem Explor 142:104–111CrossRefGoogle Scholar
  11. Ghavami M, Zhao Q, Javadi S, Jangam JSD, Jasinski JB, Saraei N (2017) Change of organobentonite interlayer microstructure induced by sorption of aromatic and petroleum hydrocarbons—a combined study of laboratory characterization and molecular dynamics simulations. Colloids Surf A Physicochem Eng Aspects 520:324–334CrossRefGoogle Scholar
  12. Hou J, Li JZ, Chen Y (2017) Coupling effect of landfill leachate and temperature on the microstructure of stabilized clay. Bull Eng Geol Environ 5:1–12Google Scholar
  13. Hu L, Zeng GM, Chen GQ, Dong HR, Liu YT, Wan J, Chen AW, Guo Z, Yan M, Wu HP, Yu ZG (2016a) Treatment of landfill leachate using immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticle. J Hazard Mater 301:106–118CrossRefGoogle Scholar
  14. Hu L, Zhang C, Zeng GM, Chen GQ, Wan J, Guo Z, Wu HP, Yu ZG, Zhou YY, Liu JF (2016b) Metal-based quantum dots: synthesis, surface modification, transport and fate in aquatic environments and toxicity to microorganisms. RSC Adv 6(82):78595–78610CrossRefGoogle Scholar
  15. Hu L, Wan J, Zeng GM, Chen AW, Chen GQ, Huang ZZ, He K, Cheng M, Zhou CY, Xiong WP, Lai C, Xu P (2017) Comprehensive evaluation of the cytotoxicity of CdSe/ZnS quantum dots in Phanerochaete chrysosporium by cellular uptake and oxidative stress. Environ Sci Nano 4:2018–2029CrossRefGoogle Scholar
  16. Huang C, Zeng GM, Huang DL, Lai C, Xu P, Zhang C, Cheng M, Wan J, Hu L, Zhang Y (2017) Effect of Phanerochaete chrysosporium inoculation on bacterial community and metal stabilization in lead-contaminated agricultural waste composting. Bioresour Technol 243:294–303CrossRefGoogle Scholar
  17. Katsioti M, Katsiotis N, Rouni G, Bakirtzis D, Loizidou M (2008) The effect of bentonite/cement mortar for the stabilization/solidification of sewage sludge containing heavy metals. Cem Conc Compos 30(10):1013–1019CrossRefGoogle Scholar
  18. Kavak A, Baykal G (2012) Long-term behavior of lime-stabilized kaolinite clay. Environ Earth Sci 66:1943–1955CrossRefGoogle Scholar
  19. Latifi N, Eisazadeh A, Marto A (2014) Strength behavior and microstructural characteristics of tropical laterite soil treated with sodium silicate-based liquid stabilizer. Environ Earth Sci 72:91–98CrossRefGoogle Scholar
  20. Latifi N, Marto A, Eisazadeh A (2015) Analysis of strength development in non-traditional liquid additive-stabilized laterite soil from macro- and micro-structural considerations. Environ Earth Sci 73:1133–1141CrossRefGoogle Scholar
  21. Liao ZD (2011) Application of anti-seepage grouting technique of special clay curing grout in danger removal and reinforcement of Yangmei reservoir. Henan Water Resour South-to-North Water Divers 2011(24):39–40 (in Chinese) Google Scholar
  22. Lin BT, Cerato AB (2015) Shear strength of shale weathered expansive soils along swell-shrink paths: analysis based on microscopic properties. Environ Earth Sci 74:6887–6899CrossRefGoogle Scholar
  23. Liu SY, Zhan LT, Hu LM, Du YJ (2016) Environmental geotechnics: state-of-the-art of theory, testing and application to practice. China Civil Eng J 49(3):6–30 (in Chinese) Google Scholar
  24. Lu YF, Cheng ZL, Xie WL, Lu ZZ (2009) Application of geotechnics to sanitation landfill of refuse. Rock Soil Mech 30(1):91–98 (in Chinese) Google Scholar
  25. Lu HJ, Li JX, Wang WW, Wang CH (2015) Cracking and water seepage of Xiashu loess used as landfill cover under wetting—drying cycles. Environ Earth Sci 74:7441–7450CrossRefGoogle Scholar
  26. Paria S, Yuet PK (2006) Solidification-stabilization of organic and inorganic contaminants using Portland cement: a literature review. Environ Rev 14:217–255CrossRefGoogle Scholar
  27. Philip LK (2001) An investigation into contaminant transport processes through single-phase cement-bentonite slurry walls. Eng Geol 60(1–4):209–221CrossRefGoogle Scholar
  28. Regadío M, Ruiz AI, Rodríguez-Rastrero M, Cuevas J (2015) Containment and attenuating layers: an affordable strategy that preserves soil and water from landfill pollution. Waste Manage 46(1):408–419CrossRefGoogle Scholar
  29. Ren XY, Zeng GM, Tang L, Wang JJ, Wan J, Liu YN, Yu JF, Yi H, Ye SJ, Deng R (2018) Sorption, transport and biodegradation—an insight into bioavailability of persistent organic pollutants in soil. Sci Total Environ 610–611:1154–1163CrossRefGoogle Scholar
  30. Romero E, Simms HS (2008) Microstructure investigation in unsaturated soils: a review with special attention to contribution of mercury intrusion porosimetry and environmental scanning electron microscopy. Geot Geol Eng 26(6):705–727CrossRefGoogle Scholar
  31. Shear DL, Olsen HW, Nelson KR (1992) Effects of desiccation on the hydraulic conductivity versus void ratio relationship for natural clay. Adv Geotech Eng Transp Res Rec 1369:130–135Google Scholar
  32. Tran TD, Cui YJ, Tang AM, Audiguier M, Cojean R (2014) Effects of lime treatment on the microstructure and hydraulic conductivity of Héricourt clay. J Rock Mech Geot Eng 6(5):399–404CrossRefGoogle Scholar
  33. Wan MD, Tang MY, Xiao KY, Wu PJ (2015) Application of anti-seepage core wall of special clay curing slurry in danger removal and reinforcement of small reservoirs. Water Conserv Sci Technol Econ 21(12):107–109 (in Chinese) Google Scholar
  34. Wan J, Zhang C, Zeng GM, Huang DL, Hu L, Huang C, Wu HP, Wang LL (2016) Synthesis and evaluation of a new class of stabilizednano-chlorapatite for Pb immobilization in sediment. J Hazard Mater 320:278–288CrossRefGoogle Scholar
  35. Wan J, Zeng GM, Huang DL, Hu L, Xu P, Huang C, Deng R, Xue WJ, Lai C, Zhou CY, Zheng KX, Ren XY, Gong XM (2018) Rhamnolipid stabilized nano-chlorapatite: synthesis andenhancement effect on Pb-and Cd-immobilization in polluted sediment. J Hazard Mater 343:332–339CrossRefGoogle Scholar
  36. Wang B, Liu GB, Xue S, Zhu BB (2011) Changes in soil physico-chemical and microbiological properties during natural succession on abandoned farmland in the Loess Plateau. Environ Earth Sci 62:915–925CrossRefGoogle Scholar
  37. Wang DY, Tang CS, Shi B, Li J (2016) Studying the effect of drying on soil hydro-mechanical properties using micro-penetration method. Environ Earth Sci 75:1009CrossRefGoogle Scholar
  38. Washburn EW (1921) Note on a method of determining the distribution of pore sizes in a porous material. Proc Nati Acad Sci USA 7(4):115–116CrossRefGoogle Scholar
  39. Xiao YZ, Pan D, Chen JK, Zhou ZJ (2014) Application of clay curing agent in impervious project of earth dam of Xiashantang reservoir. China Rural Water Hydropower 2014(10):133–136 (in Chinese) Google Scholar
  40. Xue Q, Zhang Q (2014) Effects of leachate concentration on the integrity of solidified clay liners. Waste Manage Res 32(3):198–206CrossRefGoogle Scholar
  41. Xue Q, Li JS, Liu L (2013) Experimental study on anti-seepage grout made of leachate contaminated clay in landfill. Appl Clay Sci 80–81(4):438–442CrossRefGoogle Scholar
  42. Yang YY, Wang JQ, Dou HJ (2014) Mechanical properties of anti-seepage grouting materials for heavy metal contaminated soil. Trans Nonferrous Met Soc China 24(10):3316–3323 (in Chinese) CrossRefGoogle Scholar
  43. Yao ZT, Xia MS, Sarker PK, Chen T (2014) A review of the alumina recovery from coal fly ash, with a focus in China. Fuel 120(3):74–85CrossRefGoogle Scholar
  44. Yao ZT, Wu DD, Liu J, Wu WH, Zhao HT, Tang JH (2016) Recycling of typical difficult-to-treat e-waste: synthesize zeolites from waste cathode-ray-tube funnel glass. J Hazard Mater 324(Pt B):673–680Google Scholar
  45. Yao ZT, Ling TC, Sarker PK, Su W, Liu J, Wu WH, Tang GH (2018) Recycling difficult-to-treat e-waste cathode-ray-tube glass as construction and building materials: a critical review. Renew Sust Energ Rev 81:595–604CrossRefGoogle Scholar
  46. Yi LH (2016) Application of clay solidified grouting technology in landfill site seepage prevention. China High-Tech Enterp 2016(24):87–88 (in Chinese) Google Scholar
  47. Zeng GM, Wan J, Huang DL, Hu L, Huang C, Cheng M, Xue WJ, Gong XM, Wang RZ, Jiang DN (2017) Precipitation, adsorption and rhizosphere effect: the mechanisms for phosphate-induced Pb immobilization in soils—a review. J Hazard Mater 339:354–367CrossRefGoogle Scholar
  48. Zhang WJ, Chen YM, Zhan LT (2008) Transport of leachate through vertical curtain grouting in landfills. Acta Sci Circum 28(5):925–929 (in Chinese) Google Scholar
  49. Zhang TW, Yue XB, Deng YF, Zhang DW, Liu SY (2014) Mechanical behaviour and micro-structure of cement-stabilised marineclay with a metakaolin agent. Constr Build Mater 73:51–57CrossRefGoogle Scholar
  50. Zhang XD, Chen YG, Ye WM, Cui YJ, Deng YF, Chen B (2017) Effect of salt concentration on desiccation cracking behavior of GMZ bentonite. Environ Earth Sci 76(15):531CrossRefGoogle Scholar
  51. Zhou LX (2006) Application of solidify serosity of clay and cement in slip casting engineering of imperious of a municipal refuse landfill. Geol Chem Miner 28(4):251–254 (in Chinese) Google Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil EngineeringShanghai UniversityShanghaiChina
  2. 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of SciencesWuhanChina

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