Experimental study on chemico-osmotic membrane behaviors of reactive MgO-activated slag-bentonite backfill in vertical cutoff walls exposed to Pb-laden groundwater

LI Shuang-jie; WU Hao-liang; FU Xian-lei; JIANG Ning-jun; WAN Jian-lei; LI Jiang-shan; DU Yan-jun

doi:10.11779/CJGE202206012

Volume 44 Issue 6

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Chinese Journal of Geotechnical Engineering > 2022 > 44(6): 1078-1086. > DOI: 10.11779/CJGE202206012

LI Shuang-jie, WU Hao-liang, FU Xian-lei, JIANG Ning-jun, WAN Jian-lei, LI Jiang-shan, DU Yan-jun. Experimental study on chemico-osmotic membrane behaviors of reactive MgO-activated slag-bentonite backfill in vertical cutoff walls exposed to Pb-laden groundwater[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(6): 1078-1086. DOI: 10.11779/CJGE202206012

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Experimental study on chemico-osmotic membrane behaviors of reactive MgO-activated slag-bentonite backfill in vertical cutoff walls exposed to Pb-laden groundwater

1.
Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China
2.
Department of Civil & Environmental Engineering, Hong Kong University of Science & Technology, Hong Kong 999077, China
3.
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

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Received Date: July 18, 2021
Available Online: September 22, 2022

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Abstract

Abstract

The reactive magnesia (MgO) is used as an alkali activator to activate granulated blast furnace slag (GGBS) to prepare alkali activated slag-bentonite-soil vertical barrier (MSBS) material. The chemico-osmotic memberane behavior test using lead nitrate Pb(NO₃)₂ solutions with different concentrations as testing liquids is conducted on the MSBS specimen, and the effects of Pb(NO₃)₂ concentration on the Pb²⁺ containment performance including chemico-osmotic efficiency coefficient, effective diffusion coefficient and retardation factor are evaluated. Comparative assessment of performance is made between the MSBS material in this study and other engineered barrier materials including soil-bentonite (SB) vertical cutoff wall backfill and geosynthetic clay liner (GCL) reported in previously published studies. The results show that the MSBS backfill has noticeable chemical-osmotic membrane behavior, and the chemico-osmotic efficiency coefficient decreases rapidly with the increasing Pb²⁺ concentration. The effective diffusion coefficient of Pb²⁺in the MSBS increases slightly with the increasing Pb²⁺concentration, and its change magnitude is significantly lower than that for the SB backfill materials. The retardation factor for Pb²⁺ in the MSBS backfill remains practically constant with the increasing Pb²⁺concentration, whereas it decreases significantly with the increasing Pb²⁺ concentration for the SB backfill materials.
- MgO-GGBS,
- MSBS,
- chemico-osmotic efficiency,
- effective diffusion coefficient,
- retardation factor

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References

[1]	刘松玉, 詹良通, 胡黎明, 等. 环境岩土工程研究进展[J]. 土木工程学报, 2016, 49(3): 6–30. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201603003.htm LIU Song-yu, ZHAN Liang-tong, HU Li-ming, et al. Environmental geotechnics: state-of-the-art of theory, testing and application to practice[J]. China Civil Engineering Journal, 2016, 49(3): 6–30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201603003.htm
[2]	陈云敏, 谢海建, 张春华. 污染物击穿防污屏障与地下水土污染防控研究进展[J]. 水利水电科技进展, 2016, 36(1): 1–10. https://www.cnki.com.cn/Article/CJFDTOTAL-SLSD201601002.htm CHEN Yun-min, XIE Hai-jian, ZHANG Chun-hua. Review on penetration of barriers by contaminants and technologies for groundwater and soil contamination control[J]. Advances in Science and Technology of Water Resources, 2016, 36(1): 1–10. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLSD201601002.htm
[3]	钱学德, 朱伟, 王升位. 填埋场和污染场地防污屏障设计与施工-上册[M]. 北京: 科学出版社, 2017. QIAN Xue-de, ZHU Wei, WANG Sheng-wei. Design and Condtruction of Protective Barriers for Waste Containments and Contaminated Sites[M]. Beijing: Science Press, 2017. (in Chinese)
[4]	ROWE R, QUIGLEY R, BOOKER J. Barrier Systems for Waste Disposal Facilities[M]. London: CRC Press, 2014.
[5]	YEO S S, SHACKELFORD C D, EVANS J C. Consolidation and hydraulic conductivity of nine model soil-bentonite backfills[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005, 131(10): 1189–1198. doi: 10.1061/(ASCE)1090-0241(2005)131:10(1189)
[6]	WAN H W, SHUI Z H, LIN Z S. Analysis of geometric characteristics of GGBS particles and their influences on cement properties[J]. Cement and Concrete Research, 2004, 34(1): 133–137. doi: 10.1016/S0008-8846(03)00252-7
[7]	LIU S H, HAN W W, LI Q. Hydration properties of ground granulated blast-furnace slag (GGBS) under different hydration environments[J]. Materials Science, 2017, 23(1): 70–77.
[8]	HAHA M B, LOTHENBACH B, SAOUT G L, et al. Influence of slag chemistry on the hydration of alkali-activated blast-furnace slag—part Ⅰ: effect of MgO[J]. Cement and Concrete Research, 2011, 41(9): 955–963. doi: 10.1016/j.cemconres.2011.05.002
[9]	YI Y L, LISKA M, AL-TABBAA A. Initial investigation into the use of GGBS-MgO in soil stabilisation[C]//Proceedings of the Fourth International Conference on Grouting and Deep Mixing. 2012. New Orleans.
[10]	伍浩良, 杜延军, 王菲, 等. 碱激发矿渣膨润土系竖向隔离墙体材料施工和易性及强度特性[J]. 东南大学学报(自然科学版), 2016, 46(增刊1): 25-30. https://www.cnki.com.cn/Article/CJFDTOTAL-DNDX2016S1005.htm WU Hao-liang, DU Yan-jun, WANG Fei, et al. Workability and strength characteristics of alkali-activated slag-bentonite backfills for vertical slurry cutoff wall[J]. Journal of Southeast University (Natural Science Edition), 2016, 46(S1): 25–30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-DNDX2016S1005.htm
[11]	WU H L, JIN F, ZHOU A N, et al. The engineering properties and reaction mechanism of MgO-activated slag cement-clayey sand-bentonite (MSB) cutoff wall backfills[J]. Construction and Building Materials, 2021, 271: 121890. doi: 10.1016/j.conbuildmat.2020.121890
[12]	WU H L, JIN F, NI J, et al. Engineering properties of vertical cutoff walls consisting of reactive magnesia-activated slag and bentonite: workability, strength, and hydraulic conductivity[J]. Journal of Materials in Civil Engineering, 2019, 31(11): 04019263. doi: 10.1061/(ASCE)MT.1943-5533.0002908
[13]	WU H L, NI J, ZENG L, et al. Durability of alkali-activated slag-bentonite cutoff wall exposed to sodium sulfate and Pb-Zn solution[C]//The International Congress on Environmental Geotechnics, 2018, Hangzhou.
[14]	傅贤雷, 杜延军, 沈胜强, 等. PAC改性膨润土/砂竖向阻隔屏障回填料化学渗透膜效应及扩散特性研究[J]. 岩石力学与工程学报, 2020, 39(增刊2): 3669–3675. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2020S2044.htm FU Xian-lei, DU Yan-jun, SHEN Sheng-qiang, et al. Chemico-osmotic membrane behavior and diffusive properties of PAC amended bentonite/sand vertical cutoff wall backfills[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(S2): 3669–3675. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2020S2044.htm
[15]	傅贤雷, 张润, 万勇, 等. 改性土–膨润土阻隔屏障化学渗透膜效应研究[J]. 岩土工程学报, 2020, 42(增刊1): 172–176. doi: 10.11779/CJGE2020S1034 FU Xian-lei, ZHANG Run, WAN Yong, et al. Chemico-osmotic membrane behaviors of amended soil-bentonite vertical barrier[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(S1): 172–176. (in Chinese) doi: 10.11779/CJGE2020S1034
[16]	FU X L, ZHANG R, REDDY K R, et al. Membrane behavior and diffusion properties of sand/SHMP-amended bentonite vertical cutoff wall backfill exposed to lead contamination[J]. Engineering Geology, 2021, 284: 106037. doi: 10.1016/j.enggeo.2021.106037
[17]	SCALIA J IV, BOHNHOFF G L, SHACKELFORD C D, et al. Enhanced bentonites for containment of inorganic waste leachates by GCLs[J]. Geosynthetics International, 2018, 25(4): 392–411. doi: 10.1680/jgein.18.00024
[18]	MITCHELL J K, SOGA K. Fundamentals of Soil Behavior[M]. New York: John Wiley & Sons, 2005.
[19]	SHACKELFORD C D, LEE J M. The destructive role of diffusion on clay membrane behavior[J]. Clays and Clay Minerals, 2003, 51(2): 186–196. doi: 10.1346/CCMN.2003.0510209
[20]	肖承坤. 我国铅污染现状分析[C]//全国铅污染监测与控制治理技术交流研讨会, 2007, 上海. XIAO Cheng-kun. Analysis of present situation about lead pollution in China[C]//National Lead Pollution Monitoring and Control Technology Exchange Seminar, 2007, Shanghai. (in Chinese)
[21]	地下水环境质量标准: GB/T14848—2017[S]. 2017. Environmental Quality Standard for Groundwater: GB/T14848—2017[S]. 2017. (in Chinese)
[22]	Standard Test Method for Electrical Conductivity and Resistivity of Water: ASTM D1125—14[S]. 2014.
[23]	Method for pH of Aqueous Solutions with the Glass Electrode: ASTM E70-07[S]. 2015.
[24]	FRITZ S J. Ideality of clay membranes in osmotic processes: a review[J]. Clays and Clay Minerals, 1986, 34(2): 214–223. doi: 10.1346/CCMN.1986.0340212
[25]	MALUSIS M A, SHACKELFORD C D. Chemico-osmotic efficiency of a geosynthetic clay liner[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128(2): 97–106. doi: 10.1061/(ASCE)1090-0241(2002)128:2(97)
[26]	KANG J B, SHACKELFORD C D. Clay membrane testing using a flexible-wall cell under closed-system boundary conditions[J]. Applied Clay Science, 2009, 44(1/2): 43–58.
[27]	YE W M, SU W, CHEN Y G, et al. Membrane behavior of compacted GMZ bentonite and its granite mixture[J]. Environmental Earth Sciences, 2017, 76(20): 1–13.
[28]	MALUSIS M A, SHACKELFORD C D, OLSEN H W. A laboratory apparatus to measure chemico-osmotic efficiency coefficients for clay soils[J]. Geotechnical Testing Journal, 2001, 24(3): 229–242. doi: 10.1520/GTJ11343J
[29]	HENNING J T, EVANS J C, SHACKELFORD C D. Membrane behavior of two backfills from field-constructed soil-bentonite cutoff walls[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(10): 1243–1249. doi: 10.1061/(ASCE)1090-0241(2006)132:10(1243)
[30]	SHACKELFORD C D. Laboratory diffusion testing for waste disposal—A review[J]. Journal of Contaminant Hydrology, 1991, 7(3): 177–217. doi: 10.1016/0169-7722(91)90028-Y
[31]	陈左波. 砂-膨润土系竖向隔离墙阻滞重金属污染物运移特性的试验研究[D]. 南京: 东南大学, 2014. CHEN Zuo-bo. Research of Limiting Migration of Heavy Metal of Sand. Bentonite Vertical Cutoff Wall[D]. Nanjing: Southeast University, 2017. (in Chinese)
[32]	SHACKELFORD C D. Membrane behavior in geosynthetic clay liners[C]//Geo-Frontiers Congress, 2011, Dallas.
[33]	梅丹兵. 土–膨润土系竖向隔离工程屏障阻滞污染物运移的模型试验研究[D]. 南京: 东南大学, 2017. MEI Dan-bing. Model Test Study of Limiting Migration of HeavyMeal of Soil-Bentonite Vertical Cutoff Wall[D]. Nanjing: Southeast University, 2017. (in Chinese)
[34]	张润. 六偏磷酸钠改良膨润土系竖向工程屏障防渗吸附扩散性能研究[D]. 南京: 东南大学, 2018. ZHANG Run. Hydraulic and Containment Performance of Shmp-Amended Soil-Bentonite Vertical Cutoff Wall Backfills Against Heavy Metals[D]. Nanjing: Southeast University, 2018. (in Chinese)
[35]	TANG Q. Factors Affecting Waste Leachate Generation and Barrier Performance of Landfill Liners[D]. Tokyo: University of Tokyo. 2013.
[36]	SHACKELFORD C. Membrane behavior in engineered bentonite-based containment barriers[M]//Coupled Phenomena in Environmental Geotechnics. London: CRC Press, 2013.
[37]	CONSOLI N C, HEINECK K S, CARRARO J A H. Portland cement stabilization of soil–bentonite for vertical cutoff walls against diesel oil contaminant[J]. Geotechnical and Geological Engineering, 2010, 28(4): 361-371. doi: 10.1007/s10706-009-9297-5
[38]	OWAIDAT L M, ANDROMALOS K B, SISLEY J L, et al. Construction of a soil-cement-bentonite slurry wall for a levee strengthening program[C]//Proceedings of the 1999 Annual Conference of the Association of State Dam Safety Officials, 1999. St Louis.