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Adsorptive Removal of Heavy Metals from Groundwater by Iron Oxide Based Adsorbents (Paperback)
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Adsorptive Removal of Heavy Metals from Groundwater by Iron Oxide Based Adsorbents (Paperback)
Series: IHE Delft PhD Thesis Series
Expected to ship within 12 - 17 working days
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In general, groundwater is a preferred source of drinking water
because of its convenient availability and its constant and good
quality. However this source is vulnerable to contamination by
several substances. Acceptable quality limits relative to
micropollutant contents in drinking water are becoming increasingly
lower and efficient elimination treatment processes are being
implemented in order to meet these requirements. Metals
contaminants at low concentration are difficult to remove from
water. Chemical precipitation and other methods become inefficient
when contaminants are present in trace concentrations and the
process of adsorption is one of the few alternatives available for
such situations. This book describes the adsorption method in the
removal of selected heavy metals present as cations (Cd2+, Cu2+ and
Pb2+) or oxyanions (Cr(VI) and As(V)) using iron oxide coated sand
(IOCS) and granular ferric hydroxide (GFH). The effects of pH,
natural organic matter (fulvic acid (FA)) and interfering ions
(PO43-, Ca2+) on the adsorption efficiency were also assessed. The
sorption reactions that take place at the surface of the adsorbent
were also described through the surface complexation modelling for
Cd2+, Cu2+ and Pb2+ adsorption. Batch adsorption tests and rapid
small scale column tests (RSST) were used as laboratory methods.
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