الفهرس 
Literature surveyOnly 14 pages are availabe for public view
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Abstract
This study consists of three sessions
The first session is a literature survey about the recent researches
and techniques to remove the heavy metal ions from the wastewater
mainly those dealing with natural materials and wastes
The second session is the experimental part, which is divided to two
parts The first part explains the pretreatment of the adsorbent materials
as for Eichhorina crassipes, the plant was collected and cut and washed
with tape water followed by deionized water and dried and grinded For
activated carbon, it is prepared from Cotton stem by the chemical
activation using H3P04 85% concentration For Hebba clay, it was
collected and washed with tape water followed by deionized water and
dried and grinded Also the first part explains the laboratory analyses,
which were the pH, electrical conductance, total dissolved solids, chemical
oxygen demand and heavy metal ions content The second part explains
the batch adsorption experiments, which included the effect of weight of
adsorbent material, contact time, pH of the solution and the concentration
of adsorbate It also includes the description of all instruments used in
such experiments