Turning Agricultural Waste into a Powerful Solution: Enhanced Lead Removal via Chemically Modified Oat Straw
Authors:
Jelena Dimitrijević
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
,
Sanja Jevtić
(Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia)
,
Marija Simić
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
,
Marija Koprivica
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
,
Aleksandar Jovanović
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
,
Milica Mišić
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
,
Jelena Petrović
(Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia)
Abstract
The release of industrial effluents and agricultural runoff containing heavy metals, like lead (Pb), poses serious environmental risks and significant impact on human health. This study explores the adsorption capacity of potassium hydroxide (KOH)-modified oat straw (KOS) as an effective, low-cost biosorbent for lead removal from contaminated water. The modification process increased the surface area and improved the availability of functional groups, enhancing adsorption performance compared to unmodified oat straw. Structural analysis was conducted using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared spectroscopy (FTIR). Batch experiments evaluated the effects of contact time, initialPb²⁺ concentration, and pH on lead removal efficiency. The adsorption process followed pseudo-second-order kinetics, with chemisorption as the main mechanism. Isotherm studies indicated that the Langmuir and Redlich-Peterson models offered the best fit, showing a maximum adsorption capacity of 191.41mg/g. These findings highlight the potential of KOH-modified oat straw as a sustainable solution for heavy metal removal from wastewater, effectively valorizing agricultural waste biomass.
Keywords: Avena sativa L, biomass, heavy metals, wastewater treatment, adsorption, ecofriendly process
How to Cite:
Dimitrijević, J., Jevtić, S., Simić, M., Koprivica, M., Jovanović, A., Mišić, M. & Petrović, J., (2024) “Turning Agricultural Waste into a Powerful Solution: Enhanced Lead Removal via Chemically Modified Oat Straw”, Lekovite Sirovine 44(1), 1-7. doi: https://doi.org/10.61652/leksir2444011d
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