Adsorption studies on the removal of hexavalent chromium and lead from contaminated wastewater using leaves of water hyacinth as an adsorbent [electronic resources].
دراسات أدمصاصية لإزالة الكروم سداسى التكافؤ والرصاص من المياه الصناعيه الملوثة باستخدام أوراق نبات ورد النيل كمادة إدمصاصيه.
- p.975-987.
Includes reference.
Present of heavy metals in the aquatic system has become a serious problem. As a result, there has a great deal of attention give to new technologies for removal of heavy metal ions from contaminated waters. Biosorption is one such emerging technology which utilized naturally occurring waste materials to sequester heavy metals from industrial wastewater. The wastewater containing hexavalent chromium and lead was treated with biomass prepared from water hyacinth leaves. It was found that a time of 2 hrs was sufficient for sorption to attain equilibrium. The equilibrium sorption capacity after 2 hrs was 18 mg/L and 15 mg/L for lead and chromium, respectively. The optimum pH was 5 for lead and 2 for chromium. Temperature has strong influence on biosorption process. The removal of lead decreased with increase in temperature. On the other hand, chromium removal increased with increasing in temperature up to 40°C and then started decreasing. lon exchange was the major removal mechanism along with physical sorption and precipitation.
Summary in Arabic.
Water--Pollution. Chromium. Lead abatement. Water hyacinth--Utilization.