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The Relationship Between Plasticity Ratio And Hydraulic Conductivity For Bentonite Clay During Exposure To Synthetic Landfill Leachate
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Book Synopsis The Relationship Between Plasticity Ratio and Hydraulic Conductivity for Bentonite Clay During Exposure to Synthetic Landfill Leachate by : Whitney M. Allen
Download or read book The Relationship Between Plasticity Ratio and Hydraulic Conductivity for Bentonite Clay During Exposure to Synthetic Landfill Leachate written by Whitney M. Allen and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to determine if a correlation exists between the experimentally determined liquid limit and plastic limit of a specific clay and its hydraulic conductivity when exposed to a synthetic leachate. It was determined that a trend exists that will allow for less expensive and time-consuming determination for hydraulic conductivity of a clay liner when exposed to a specific chemical solution. However, more experimental data need to be collected before a definite trend is verified. The proposed procedure requires that a hydraulic conductivity test of the clay be run using deionized water as the permeant, and plasticity index tests be performed using the leachate.
Book Synopsis Evaluation of the Long Term Effect of Inorganic Leachate on Geosynthetic Clay Liners by : Darwish El-Hajji
Download or read book Evaluation of the Long Term Effect of Inorganic Leachate on Geosynthetic Clay Liners written by Darwish El-Hajji and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Because of its low permeability and high swelling characteristics, bentonite is used in various hydraulic barrier systems and in the manufacturing of Geosynthetic Clay Liners (GCLs). Exposure to inorganic solutions containing elevated concentrations of electrolyte can significantly increase their permeability. To enhance the bentonite's chemical resistance to inorganic solutions, the manufacturers of GCL materials introduced propriety soluble polymeric compounds as an additive to bentonite. The resulting materials are referred to as polymer-treated, chemically-enhanced, or contaminant-resistant clays, and are arguably resistant to a host of inorganic chemicals. In this study, the response of both regular and polymer treated bentonite clays to ordinary tap water and inorganic landfill leachate is evaluated using permeability tests, index tests and x-ray diffraction. The results indicate the high dependence of performance on sample preparation techniques, pre-hydration conditions, and first wetting liquid and, to a lesser extent, polymer treatment. The x-ray diffraction results indicate that the samples reached chemical equilibrium during the permeation process, as demonstrated by a full shift in d-spacing from Na-bentonite to Ca-bentonite. Further, the results show that the cation exchange capacity, the clay plasticity ratio, and the swell index appear to be reliable indicators of the hydraulic compatibility of bentonite permeated with inorganic chemicals.
Book Synopsis Effects of Leachate from Bioreactor and Recirculation Landfills on the Hydraulic Conductivity of Geosynthetic Clay Liners by : Tammy L. Rauen
Download or read book Effects of Leachate from Bioreactor and Recirculation Landfills on the Hydraulic Conductivity of Geosynthetic Clay Liners written by Tammy L. Rauen and published by . This book was released on 2007 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of the Performance of Engineered Waste Containment Barriers by : National Research Council
Download or read book Assessment of the Performance of Engineered Waste Containment Barriers written by National Research Council and published by National Academies Press. This book was released on 2007-09-22 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: President Carter's 1980 declaration of a state of emergency at Love Canal, New York, recognized that residents' health had been affected by nearby chemical waste sites. The Resource Conservation and Recovery Act, enacted in 1976, ushered in a new era of waste management disposal designed to protect the public from harm. It required that modern waste containment systems use "engineered" barriers designed to isolate hazardous and toxic wastes and prevent them from seeping into the environment. These containment systems are now employed at thousands of waste sites around the United States, and their effectiveness must be continually monitored. Assessment of the Performance of Engineered Waste Containment Barriers assesses the performance of waste containment barriers to date. Existing data suggest that waste containment systems with liners and covers, when constructed and maintained in accordance with current regulations, are performing well thus far. However, they have not been in existence long enough to assess long-term (postclosure) performance, which may extend for hundreds of years. The book makes recommendations on how to improve future assessments and increase confidence in predictions of barrier system performance which will be of interest to policy makers, environmental interest groups, industrial waste producers, and industrial waste management industry.
Book Synopsis Hydraulic Conductivity of Geosynthetic Clay Liners Permeated at Elevated Temperatures by : Nimisha H. Patel
Download or read book Hydraulic Conductivity of Geosynthetic Clay Liners Permeated at Elevated Temperatures written by Nimisha H. Patel and published by . This book was released on 2005 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relationship of Laboratory- and Field-determined Hydraulic Conductivity in Compacted Clay Layer by : A. S. Rogowski
Download or read book Relationship of Laboratory- and Field-determined Hydraulic Conductivity in Compacted Clay Layer written by A. S. Rogowski and published by . This book was released on 1990 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Cation Exchange During Subgrade Hydration and Leachate Permeation on the Hydraulic Conductivity of Geosynthetic Clay Liners by : Sabrina L. Bradshaw
Download or read book Effect of Cation Exchange During Subgrade Hydration and Leachate Permeation on the Hydraulic Conductivity of Geosynthetic Clay Liners written by Sabrina L. Bradshaw and published by . This book was released on 2008 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Initial Hydration Conditions on GCL Leachate Permeability by : L. Comeaga
Download or read book Influence of Initial Hydration Conditions on GCL Leachate Permeability written by L. Comeaga and published by . This book was released on 1997 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern landfill liners typically contain several geosynthetics and natural omponents integrated into a system whose primary function is the containment of waste and leachate. One of these hydraulic barrier components is represented by Geosynthetic Clay Liners (GCL). The GCLs are factory manufactured hydraulic barriers consisting of bentonite clay supported by geotextiles or geomembranes. Since the waterproofing function is assured by the bentonite clay it is therefore advisable to verify its chemical compatibility with the leachate and its effect upon the hydraulic conductivity value. According to the climatic situations occurring between the GCLs and waste installation, the leachate exposure moment can correspond to various GCLs hydration degrees. In this context, this paper aims at analyzing the total or partially hydrated GCL's behavior after a long time exposure to leachate. The permeability tests carried out for two needle-punched GCLs in three situations (saturated with water, water partially hydrated and saturated with leachate) show an important variation of the permeability with the hydration degree.
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Compatibility of Geosynthetic Clay Liners with Leachate from CCP Management Facilities by :
Download or read book Compatibility of Geosynthetic Clay Liners with Leachate from CCP Management Facilities written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were conducted to evaluate whether coal combustion product (CCP) leachates adversely affect the hydraulic conductivity (K) of geosynthetic clay liners (GCLs) as an alternative material in lieu of a compacted clay liner (CCL). Chemical properties of CCP leachates were compiled based on a nationwide survey of CCP disposal facilities. Five synthetic leachates were developed to represent a range of conditions encountered in CCP disposal facilities: typical CCP leachate, strongly divalent cation fly ash leachate, flue gas desulfurization (FGD) residual leachate, high ionic strength ash leachate, and trona ash leachate. Nine GCLs were tested: two Na-bentonite (NaB) GCLs, six bentonite-polymer (P-B) GCLs, and one bentonite polymer composite (BPC). Hydraulic conductivity tests on GCLs were conducted on prehydrated (60-d on subgrade soil or DI water) and non-prehydrated GCL specimens. Tests were run to hydraulic and chemical equilibrium at effective stresses of 20 kPa, and then higher effective stresses were applied up to 450 kPa. At 20 kPa, the GCLs with NaB had high hydraulic conductivity to CCP leachates (10-10 to 10-6 m/s). Hydraulic conductivity was directly proportional to the ionic strength of the leachate and inversely proportional to the swell index of the bentonite when hydrated in leachates. The hydraulic conductivity of B-P GCLs with low polymer loading (d"1.2%) behaved similarly to NaB GCLs. However, the hydraulic conductivity of GCLs with polymer loading e"1.9 % is controlled by the clogging behavior of polymer hydrogel. Polymer elution was observed during the hydraulic conductivity tests, and increasing hydraulic conductivity was associated with cumulative polymer elution. Increasing the effective stress from 20 to 450 kPa caused the hydraulic conductivity to decrease by up to three orders of magnitude. At 450 kPa effective stress, the hydraulic conductivities of all tests were lower than 10-9 m/s except for one test with Trona leachate. This observation indicates that high effective stress can minimize the effect of CCP chemistry on the hydraulic behavior of GCLs. Subgrade hydration had no beneficial effect on hydraulic conductivity; however, prehydration with DI water can effectively protect the GCLs due to a large amount of immobile water retained in the bentonite
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 1424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Waste Leachates on the Hydraulic Conductivity of Natural Clays [microform] by : Federico Fernández
Download or read book The Effects of Waste Leachates on the Hydraulic Conductivity of Natural Clays [microform] written by Federico Fernández and published by National Library of Canada. This book was released on 1989 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sarnia clays appeared to be compatible with domestic waste leachate, showing slight reductions in k. Extensive retardation of potassium from the leachate required long testing periods (up to twelve pore volumes) before the soils were deemed to be in chemical equilibrium.
Book Synopsis Organic Leachate Effects to Hydraulic Conductivity in Fine-grained Soils by : Y. B. Acar
Download or read book Organic Leachate Effects to Hydraulic Conductivity in Fine-grained Soils written by Y. B. Acar and published by . This book was released on 1982 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Ash-landfill Leachate and Some Salt Solutions on the Hydraulic Conductivity of Maine Marine Clay by : Kim Lisa Kreiton
Download or read book The Effect of Ash-landfill Leachate and Some Salt Solutions on the Hydraulic Conductivity of Maine Marine Clay written by Kim Lisa Kreiton and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Relationship Between the Dry Density, the Atterberg Limits, and the Hydraulic Conductivity of a Clay Liner by : Kazeem Samson Abudu
Download or read book The Relationship Between the Dry Density, the Atterberg Limits, and the Hydraulic Conductivity of a Clay Liner written by Kazeem Samson Abudu and published by . This book was released on 1998 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The objective of the study is to find the relationship between the plasticity index, percent finer than No.200, dry density, and the hydraulic conductivity of clay liners. In hydraulic conductivity testing of a clay liner, it is required that the sample should be saturated before the experiment. The saturation process takes two or more days depending on soil type. This prolongs the time required to perform the experiment. This work provides a means of estimating the hydraulic conductivity based on the soil's physical characteristics and does not require a saturated sample. The three types of soils used in this study are; (i) high plasticity silt (MH), high plasticity clay, and (iii) low plasticity clay. Samples of these soils were obtained from various borrow pits and four different types of experiments were performed; the Atterberg limit test, the percent finer than No.200, the Standard Proctor test, and the hydraulic conductivity test. The results were analyzed and used to develop a chart that can in turn be used to estimate the hydraulic conductivity given certain other parameters. Also Geographic Information System (GIS) was used to develop a soil map for Mecklenburg County. This map shows different types of soil and their location that can be used as clay liner. These sites can also be used to build a future sanitary landfill.
Book Synopsis Design, Construction, and Evaluation of Clay Liners for Waste Management Facilities by : L. J. Goldman
Download or read book Design, Construction, and Evaluation of Clay Liners for Waste Management Facilities written by L. J. Goldman and published by . This book was released on 1988 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydraulic and Chemical Properties of Geosynthetic Clay Liners Overlain by Geomembrane in Landfill Final Covers by : Joseph Scalia
Download or read book Hydraulic and Chemical Properties of Geosynthetic Clay Liners Overlain by Geomembrane in Landfill Final Covers written by Joseph Scalia and published by . This book was released on 2009 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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