Abstract
Alfalfa leaf leftovers, a biomass waste from agriculture, were evaluated in this work as sorbent plant matter for oil elimination from seawater before desalination units. At 2 min and a 0.25 g biomass dosage, the exothermic (∆H: −51.55 kJ.mol−1) system’s maximal oil removal was 90%, and an adsorption capacity of 1.76 g/g was attained. The oil uptake was formfitting using the pseudo-first-order kinetic (R
2 = 0.9955) model and Langmuir (R
2 = 0.93292) with Hill (R
2 = 0.98216) isotherms, according to the results of kinetic and isotherm investigations conducted on the oil sorption outcomes. Also, the economic recycling of Alfalfa leaf leftovers decreased to less than 50% after two adsorption–desorption cycles. Leftover alfalfa leaves have good oil-adsorbing properties that make them suitable as adsorbent material for cleaning up oil spills and used in systems that purify water and oil.
