Adsorption of Fluoride from Aqueous Solution using Eggshell Pretreated with Plasma Technology

Fluoride is a toxic substance that can cause adverse effects on human health such as dental and skeletal fluorosis. Therefore, the objective of this study was to investigate adsorption potential fluoride from aqueous solution using eggshell pretreated with plasma technology compare untreated eggshell. The batch experiments were carried out their performances removal efficiency, capacity isotherm. factors contact time (5 - 360 min), adsorbent dosage (10 35 g/L) particle size (mesh sieve no.12 20 or 0.85 1.70 mm opening) studied. results showed initial concentration 10 mg/L, optimum condition for obtained at 180 min, 25 g/L Sieve no.16 (≤1.18 in diameter). With condition, maximum efficiency increased 59.88 % 90.34 %, which due an increase sites after surface modification process Moreover, clearly isotherm fitted by Langmuir model, indicate monolayered adsorption. 0.341 mg/g eggshell, while 0.202 This has application future needs further investigation continuous column. HIGHLIGHTS Eggshell (EPPT) applied Effects time, examined method Maximum (F) EPPT F GRAPHICAL ABSTRACT