The conventional methods used for heavy metals removal from wastewater are cost
inefficient and non-ecofriendly. Thus, biosorption using waste materials was proposed in this
study. The study was carried out to remove chromium (VI), Cr (VI) ions using raw eggshell
and hybrid eggshell-pandan biosorbent. The result obtained showed that the hybrid sorbent
had higher efficiency in removal of Cr (VI) ions. The experimental results had indicated that
in order to achieve the optimum Cr (VI) ions removal percentage of 17.78%, the optimum …

Currently, wastewater containing heavy metals treatment has been included as a significant
topic for research. This is due to the effluent that is concentrated with a toxic and hazardous
content which needs for a proper treatment as to reduce the environmental impacts before it
can be released as an effluent. Therefore, biosorption by waste material was proposed in
this study as a treatment method for this type of wastewater. The objective is focus on the
comparison of the characteristics and performance of raw eggshell waste biosorbent with …