MECHANISMS CONTROLLING HYDRAULIC CONDUCTIVITY OF BENTONITE CLAY LINERS WITH BAUXITE LIQUOR

LI Qin; LIAO Cai-neng; LIAO Ming-xu; PENG Dao-ping; HUANG Tao

doi:10.13205/j.hjgc.202101023

Volume 39 Issue 1

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(1): 148-153

LI Qin, LIAO Cai-neng, LIAO Ming-xu, PENG Dao-ping, HUANG Tao. MECHANISMS CONTROLLING HYDRAULIC CONDUCTIVITY OF BENTONITE CLAY LINERS WITH BAUXITE LIQUOR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 148-153. doi: 10.13205/j.hjgc.202101023

Citation:

LI Qin, LIAO Cai-neng, LIAO Ming-xu, PENG Dao-ping, HUANG Tao. MECHANISMS CONTROLLING HYDRAULIC CONDUCTIVITY OF BENTONITE CLAY LINERS WITH BAUXITE LIQUOR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 148-153. doi: 10.13205/j.hjgc.202101023

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MECHANISMS CONTROLLING HYDRAULIC CONDUCTIVITY OF BENTONITE CLAY LINERS WITH BAUXITE LIQUOR

doi: 10.13205/j.hjgc.202101023

Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China

Received Date: 2019-12-12
Available Online: 2021-04-23

Abstract

Abstract

The high ionic strength of bauxite liquor could suppress swelling of montmorillonite, which results in sodium bentonite clay liner (GCL) that was too permeable to be used as an impermeable liner in red mud treatment facilities. The mechanism controlling of strongly alkaline bauxite liquor and sodium bentonite clay liner was investigated through the infiltration process of sodium bentonite clay liner and two types of bauxite liquor. The results showed that hydraulic conductivity of natural sodium bentonite (Na-GCL) and artificial sodium bentonite (Ar-GCL) was closely related to ionic strength of bauxite liquor. As ionic strength increased, hydraulic conductivity systematically increased. Hydraulic conductivity of Shandong bauxite liquor with high ionic strength was the largest, 7.8×10^-7 and 3.2×10^-7 m/s, respectively. Hydraulic conductivity was positively related to swelling index. Through the analysis of the microstructure diagram of SEM scanning, swelling mechanism of bentonite controlled its hydraulic conductivity. High ionic strength caused permeable expansion of bentonite mineral layer, and absorbed a large amount of water, which reduced the porosity and changed the flow path of the fluid, resulting in an increase of hydraulic conductivity.
- bentonite clay liner,
- bauxite liquor,
- hydraulic conductivity,
- swell index,
- Mechanisms Controlling

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References(26)

References

陈喜峰. 中国铝土矿资源勘查开发现状及可持续发展建议[J]. 资源与产业, 2016, 18(3):16-22.

中华人民共和国工业和信息化部. 赤泥综合利用指导意见[G/OL]. www.miit.gov.cn, 2010.

POWER G, GRÄFE M, KLAUBER C. Bauxite residue issues:I. Current management, disposal and storage practices[J].Hydrometallurgy, 2011, 108(1):33-45.

XUE S G, KONG X F, ZHU F, et al. Proposal for management and alkalinity transformation of bauxite residue in China[J]. Environmental Science and Pollution Res Intearch, 2016, 23(13):12822-12834.

南相莉, 张廷安, 刘燕, 等. 我国主要赤泥种类及其对环境的影响[J]. 过程工程学报, 2009, 9(1):459-464.

CHEN J N, SUN C W, PENG D P, et al. The toxic elements and health impact of leachate from red mud management facilities[J]. Basic & Clinical Pharmacology & Toxicology, 2019, 124(3):30-31.

杨海朋, 白冰, 聂庆科. 赤泥渗沥液对黏性土和固化赤泥影响的试验研究[J]. 岩土力学,2017,38(增刊1):299-304.

张宏伟, 林伟岸, 詹良通, 等. 土工膜/GCL界面剪切强度特性的试验研究[J]. 岩土工程学报, 2013, 46(2):123-130.

MESRI G, OLSON R. Mechanisms controlling the permeability of clays[J]. Clays and Clay Minerals, 1971,19:151-158.

NORRISH K, QUIRK J. Crystalline swelling of montmorillonite, Use of electrolytes to control swelling[J]. Nature, 1954,173:255-257.

CHEN J N, BRADSHAW S, LIKOS, W, et al. Hydraulic conductivity of geosynthetic clay liners to synthetic coal combustion product leachates[A]. Geo-Characterization and Modeling for Sustainability, Geotechnical Special Publication No. 234, ASCE, Reston, VA, 2014, 334-342.

BRADSHAW S L, BENSON C H. Effect of municipal solid waste leachate on hydraulic conductivity and exchange complex of geosynthetic clay liners[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2014, 140(4):04013038.

介玉新, 彭涛, 傅志斌, 等. 土工合成材料黏土衬垫的渗透性研究[J]. 土木工程学报, 2009, 42(2):92-97.

ASTM. Standard test methods for measurement of hydraulic conductivity of saturated porous materials using a flexible wall permeameter[S]. ASTM D5084, West Conshohocken, PA,2016.

ASTM. Standard test method for measuring the exchange complex and cation exchange capacity of inorganic fine-grained soils[S]. ASTM D7503, West Conshohocken, PA,2010.

ASTM. Standard test method for evaluation of hydraulic properties of geosynthetic clay liners permeated with potentially incompatible aqueous solutions[S]. ASTM D6766, West Conshohocken, PA,2012.

ASTM. Standard test method for swell index of clay mineral component of geosynthetic clay liners[S]. ASTM D5890, West Conshohocken, PA,2011.

TIAN K, BENSON C, LIKOS W. Hydraulic conductivity of geosynthetic clay liners to low-level radioactive waste leachate[J]. Journal of Geotechnical Geoenvironmental Engineering, 2016, 142(8):04016037.

JO H, BENSON C, LEE J, et al. Long-term hydraulic conductivity of a non-prehydrated geosynthetic clay liner permeated with inorganic salt solutions[J]. J Geotech Geoenviron Eng, 2005, 10.1061/(ASCE)1090-0241(2005)131:4(405):405-417.

BENSON C, OREN A, GATES W. Hydraulic conductivity of two geosynthetic clay liners permeated with a hyperalkaline solution[J]. Geotext Geomembr, 2010, 28(2):206-218.

SCALIA J, BENSON C H, BOHNHOFF G L, et al. Long-term hydraulic conductivity of a bentonite-polymer composite permeated with aggressive inorganic solutions[J]. Journal of Geotechnical Geoenvironmental Engineering, 2014, 140(3):04013025.

CHEN J N, BENSON C, EDIL T. Hydraulic conductivity of geosynthetic clay liners with sodium bentonite to coal combustion product leachates[J]. Journal of Geotechnical Geoenvironmental Engineering, 2018, 144(3).

JO H, KATSUMI T, BENSON C, et al. Hydraulic conductivity and swelling of non-prehydrated GCLs permeated with single species salt solutions[J]. Journal of Geotechnical Geoenvironmental Engineering, 2001, 127(7):557-567.

KOLSTAD D, BENSON C, EDIL T, et al. Hydraulic conductivity of a dense prehydrated GCL permeated with aggressive inorganic solutions[J]. Geosynthetics International, 2004b, 11(3):233-241.

TIAN K, BENSON C H. Containing bauxite liquor Using Bentonite-Polymer Composite Geosynthetic Clay Liners[C]//Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2, Springer Singapore, Singapore, 2019:672-678.

CHEN J, BRADSHAW S, BENSON C, et al. pH-Dependent Leaching of Trace Elements from Recycled Concrete Aggregate, State of the Art and Practice in Geotechnical Engineering[M]. ASCE, Reston VA, 2012:3729-3738.

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