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Removal of Heavy Metal Impurities from Dredged River Sediment by Mohammed K. Abd El- Rahman; A. Maes; Peter Cauwenberg is a Engineering article available to read on EtoBox.

What is Removal of Heavy Metal Impurities from Dredged River Sediment about?

This article shows the results of a study that aims to remove the sediment fraction containing heavy metals from river sediment by flotation. Different parameters such as pH, flotation time, different collectors, distilled water, tap water, and different salts were investigated to achieve a high separation efficiency. Explanations are suggested for the obtained results. Results of flotation revealed that 63% by weight of the input dredged sediment can be safely and successfully separated, thus, meeting the standard environmental requirement of current Flemish (Belgium) regulation abodemsaneringsdecreeta (February 1995). This dredged fraction could not be achieved before a flotation time of 15 min. Increasing flotation time would impart less metal content but with a lower yield. In the case of applying the settling technique, 55% by weight of the dredged sample meeting the same standard specification was obtained. Results are explained in the light of a model, which assumes that sediment contains organic matter together with heavy metals, clay, and sand. Upon aeration, air bubbles are adsorbed on hydrophobic particles, which carry them up to the froth layer with the hydrophilic part

Who reads Removal of Heavy Metal Impurities from Dredged River Sediment?

Author

Mohammed K. Abd El- Rahman; A. Maes; Peter Cauwenberg

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0930-7516)

Published

1999

Language

EN

Field

Engineering (Physical Sciences)