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The tremendous increase in the use of heavy metals over the past few decades has inevitably resulted in an increased flux of metallic substances in aquatic environment. The elimination of heavy metals from wastewater is of utmost importance to protect public health. Adsorption process is promising in this regard as it achieves higher level of removal over a wider range of solution concentrations and generally reduce the quantity of solid residual that need to be disposed of. The present work has been designed for using natural and modified clays as adsorbents with the objectives, namely (i)...

This work investigates the impacts of the effluents and other wastes of a Textile Mill on quality of soil and water in the surrounding areas. Some specific impacts on soil and water quality have been identified. For example, the soil was getting enriched with both ionic matter and hydrophobic organic matter, which had important consequences. The soil became enriched with the trace metals, As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn. The quality of the drinking water in and around the textile mill did reflect the changes in the physico-chemical quality of the soil. The water was characterized by...

This work has yielded a comprehensive study on the runoff characteristics as well as the sediments from nine different locations of Guwahati, India. The study tries to give a thorough understanding of the sediment-runoff interactions and shows which are the most mobile metals in the runoff sediments of the city. A detailed speciation study of the trace metals was carried out and it was found that the metals in the sediments were bound to different chemical fractions. Cd was the most predominant in the carbonate-bound fraction, while Co and Cu showed predominant presence in the fraction bound...