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Geomechanics and Engineering
  Volume 1, Number 4, December 2009, pages 291-306
DOI: http://dx.doi.org/10.12989/gae.2009.1.4.291
 


Interaction of industrial effluents and bentonite: a comparative study of their physico-chemical and geotechnical characteristics
V. Murugaiyan, R. Saravanane and T. Sundararajan

 
Abstract
    One-dimensional soil-column studies were carried out to understand the interaction of three industrial effluents namely amino acid (\'highly acidic\'), surfactant (\'highly organic\') and pharmaceutical (\'organic and toxic\') on the physicochemical behavior, index properties and shear strength of bentonite due to artificial contamination extending to nearly 300 days. Changes in inorganic and organic pollutants present in the effluents due to the interaction of the above effluents and soil were assessed to understand the physico-chemical behaviour. Batch and continuous modes of operation, 8 hrs and 16 hrs Hydraulic Retention Time [HRT] and 25%, 50% concentrations of effluents, were the parameters considered. Amino acid, surfactant and pharmaceutical effluents have shown a high variation in pH (7 to 8) after artificial contamination on bentonite that is their original characteristics of the above effluents have been completely reversed. Further, it is found that the shear strength of bentonite has reduced by about 20%, and with respect to liquid limit and plastic limit shows an increasing trend with time within the period of contamination.
 
Key Words
    industrial effluents; amino acid; surfactant; pharmaceutical; bentonite; physico-chemical behavior; index properties and strength strength of soils.
 
Address
V. Murugaiyan: Department of Civil Engineering, Pondicherry Engineering College, Puducherry-605014, India
R. Saravanane: Department of Civil Engineering, Pondicherry Engineering College, Puducherry-605014, India
T. Sundararajan: Department of Civil Engineering, Pondicherry Engineering College, Puducherry-605014, India
 

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