The presence of heavy metals in wastewater will contaminate
the water environment. Furthermore, the wastewater which has
not been handled properly will pose an admitted hazard to human
health and the environment. Hence, heavy metals must be
removed from wastewater to bring their concentrations down to
below the prescribed legal limit.
Pumice is a porous material with large surface area, which can
provide more reaction sites for heavy metals thus leading to the
removal of heavy metals from wastewater [1]. Pumice can be used
as an efficient low-cost adsorbent for heavy metals [2]. Furthermore,
pumice particles were effective as a support media in
filtration and heterogeneous catalytic reactions [3,4]. Iron-coated
pumice performed well both in maintaining the long-term hydraulic
conductivity and eliminating contaminants [5].