UTILIZATION OF AGRICULTURE WASTE FOR REMOVAL OF HEAVY
METAL IONS THROUGH BIOSORPTION
Ahmad Ashfaq and Aatika Saadia
Abstract
The contamination of water due to toxic heavy metal ions is accountable for causing several damages to the
environment and adverse effects on health of the people; as these are non-biodegradable and get accumulated
in living tissues, thus becoming concentrated throughout the food chain. Utilization of one waste
material to control pollution caused by another is of high significance in the remediation of environmental
problems. Rice husk, an abundantly available agricultural waste, can be used as a low cost adsorbent for
the removal of dyes and heavy metals from effluent streams. Conventional technologies for the removal/
remediation of toxic metal ions from wastewaters are proving expensive due to non-regenerable materials
used and high costs. Biosorption is emerging as a technique offering the use of economical alternate biological
materials for the purpose. This paper presents the use of rice husk to exhibit different affinities
toward different metals and hence its importance to be employed as an effective biosorbent material.
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