Immobilization of Lead Contaminated Low Plastic Clay
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 5
Abstract
We Indians are living in an age of industrialism where our soils may become contaminated by the accumulation of heavy metals through emissions from the rapidly expanding industrial areas, land application of fertilizers, wastewater irrigation, disposal of high metal wastes etc. Heavy metals constitute an ill-defined group of inorganic chemical hazards which generate leachate during leaching process causing the soil and ground water contamination during its interaction with the both. This is not only harmful for the subsurface water aquifers but also for structures existing on it. Any changes in engineering properties and behaviour of soil strata may lead to loss of bearing capacity, an increase in settlement of foundation system consequently leading to failure of structures thereby causing loss of property and life. The adequate protection and restoration of soil ecosystems contaminated by heavy metals require their characterization and remediation. In this study the soil contaminated is immobilized, which result in the redistribution of contaminants from solution phase to solid phase, thereby reducing their bioavailability and transportation in the environment. Thus leaching is restricted by isolating the waste within a solid cementitious matrix. In the present study low plastic clay was artificially contaminated using Lead Acetate at different concentration and an attempt is made to immobilize it using a mixture of class F fly ash and OPC. The effectiveness of the treatment was evaluated by means of compressibility, permeability, plasticity tests and toxicity characteristic leaching procedure (TCLP).
Authors and Affiliations
Athira Sindhu Manikantan, Rani V
Keywords
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