Some of these techniques though effective have serious cost
and health implications and others are inefficient especially when
the concentration of the heavy metal ion is low, of the order of
1–100 mg L−1.
The cost implications are more serious to the developing countries.
Therefore, cost effective and more environmentally friendly
materials for removing heavy metals from contaminated water
and soils are required. Various chemical and biological materials
regarded to be environmentally friendly and cheap have been and
continue to be investigated for the remediation of heavy metalcontaminated
environmental samples [12,13].
Recently, there has been an increasing trend to evaluate some
indigenous cheaper biological materials for wastewater treatment.
Moringa oleifera (MO) seeds biomass has been found to remove the
turbidity and other impurities in water [14–17]. As a tropical multipurpose
tree, MO is very interesting from the point of view of the
developing world as it can easily be cultivated and adaptable to
semi arid climates. Apart from being an environmentally friendly
resource, the use of MO has two further advantages in water treatment
and,thatis, it can be used a primary source of activated carbon
and has coagulant/flocculant agent in the seeds.
Some of these techniques though effective have serious costand health implications and others are inefficient especially whenthe concentration of the heavy metal ion is low, of the order of1–100 mg L−1.The cost implications are more serious to the developing countries.Therefore, cost effective and more environmentally friendlymaterials for removing heavy metals from contaminated waterand soils are required. Various chemical and biological materialsregarded to be environmentally friendly and cheap have been andcontinue to be investigated for the remediation of heavy metalcontaminatedenvironmental samples [12,13].Recently, there has been an increasing trend to evaluate someindigenous cheaper biological materials for wastewater treatment.Moringa oleifera (MO) seeds biomass has been found to remove theturbidity and other impurities in water [14–17]. As a tropical multipurposetree, MO is very interesting from the point of view of thedeveloping world as it can easily be cultivated and adaptable tosemi arid climates. Apart from being an environmentally friendlyresource, the use of MO has two further advantages in water treatmentand,thatis, it can be used a primary source of activated carbonand has coagulant/flocculant agent in the seeds.
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