Abstract
Heavy metals eradication from water is a complicated subject, therefore a viable, resilient, and green technology is imperative. Heavy metal removal can be accomplished through easy access, economical, and efficient sorbents derived from agricultural waste. In the current study, palm kernel shell (PKS) waste was converted into biochar (PKSC) via pyrolysis. Chemical modification was performed on PKSC via acid-base treatment to refine its adsorption properties. Batch experiments were conducted to study the efficiency of PKSC and acid-base treated PKSC (MPKSC) for removal of Cr(IV), Ni(II) and Cu(II). The surface area was increased from 112.934 m 2/g to 149.670 m 2/g by acid-based treatment. Batch adsorption study showed that the MPKSC afforded high removal efficiency for Cu (99.29%), Ni (96.77%) and Cr (42.97%). The Cr(IV) and Ni(II) adsorption by PKSC, as well as Cr(IV), Ni(II) and Cu(II) adsorption by MPKSC were best represented by Freundlich isotherm. However, Cu(II) adsorption by PKSC can explained by using Langmuir isotherm. All studied heavy metals fitted the pseudo-second-order kinetic.
Highlights
Agricultural, and industrial operations have resulted in the discharge of toxic disadvantageous heavy metals into the water bodies
Heavy metal removal can be accomplished through easy access, economical, and efficient sorbents
Palm Kernel Shell biochar exhibited 98.62%, 97.10%, and 48.98% Copper, Nickle, and Chromium ion removal respectively while modified Palm Kernel Shell biochar resulted in 99.29% Copper, 96.77% Nickle, and 42.97% Chromium ion elimination
Summary
Co-Organizers: Taiwan - Malaysia Innovation Center for Clean Water and Sustainable Energy (WISE Center) CHEMICALLY MODIFIED PALM KERNEL SHELL BIOCHAR FOR THE REMOVAL OF HEAVY METALS FROM AQUEOUS SOLUTION Muhammad Imran-Shaukat1, Rafeah Wahi1,*, Nur Rafikah Rosli1, Sharifah Mona Abd Aziz Abdullah2, and Zainab Ngaini1
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