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Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
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Faculty of Technology and Metallurgy, University of Belgrade, 4 Carnegie , 11 000 Belgrade , Serbia
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Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
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Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
,
Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
,
Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
Institute for Technology of Nuclear and Other Mineral Raw Materials, 86 Franchet d’Esperey St. , 11 000 Belgrade , Serbia
The release of industrial effluents and agricultural runoff containing heavy metals, like lead (Pb), poses serious environmental risks. 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 SEM and FTIR. Batch experiments evaluated the effects of contact time, initial Pb²⁺ 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 191.41 mg/g. These findings highlight the potential of KOH-modified oat straw as a sustainable solution for heavy metal removal from wastewater, effectively valorizing waste biomass.
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