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Research Of The Migration Law Of Carbon Nanotubes In Geosynthetic Clay Liner

Posted on:2017-10-23Degree:MasterType:Thesis
Country:ChinaCandidate:C X LiFull Text:PDF
GTID:2322330488987068Subject:Civil engineering
Abstract/Summary:PDF Full Text Request
Nanotechnology now has a comprehensive application in every realm,and the toxicity hazard of nanoparticles to the environment and biological systems is increasingly a cause for attention.Existing design of anti-pollution barrier system of municipal solid waste landfill does not take into account the interception of nanoparticles,which may lead to in future nanoparticles enter the environment through anti-pollution barrier system and do potential harm to the environment.The paper intend on researching to transport of carbon nanotubes in anti-pollution barrier system,establishing mathematics models to reflect and descript migration law of nanoparticles in antipollution barrier system,seeking its analysis solutions which is compared with the result of limited element software.Meanwhile geosynthetic clay liner material used in anti-pollution barrier system will be tested by penetration test and so on,through which the block ability of these models and materials to nanoparticles will be evaluated,and the parameter of calculations of mathematical models and numerical calculation will be provided.Research will provide reliable result in improving the design of existing anti-pollution barrier system,enhancing the ability of its intercept of nano-particles,which is of great significance to avoid nano-particles may cause potential damage to the environment and biological systems in future.The main research results are as follows:(1)Through constant head permeability test for carbon nanotubes in a single layer geosynthetic clay liner in migration show: its permeability coefficient decreases over time,and at an identical time,permeability coefficient reduces with the incremental pressure,a significant linear correlativity between penetration quotient and logarithm of pressure.(2)The author makes a quantitative analysis for the concentration of carbon nanotube filtrate by Drying weighing method,the study finds the average interception rate of geosynthetic clay liner for carbon nanotubes reaches 95%;(3)By proposing boundary conditions of piecewise linear function and introducing pressure influence,the author establishes mathematics models to descript migration law of carbon nanotubes in geosynthetic clay liner,and obtains its analytical solution;(4)The paper uses finite element analysis software SEEP/W and CTRAN/W to simulate and analyse the transport process of carbon nanoparticles in geosynthetic clay liner,and the simulation results with the experimental and theoretical results are consistent.
Keywords/Search Tags:Carbon Nanotubes, GCL, Solute Transport, Permeability Coefficient, CTRAN/W
PDF Full Text Request
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