CoFe2O4@methylcellulose synthesized as a new magnetic nanocomposite to tetracycline adsorption: modeling, analysis, and optimization by response surface methodology

Tetracycline Adsorption from Aqueous Media by Magnetically Separable Fe3O4@Methylcellulose/APTMS: Isotherm, Kinetic and Thermodynamic Studies

“…The adsorption capacity at equilibrium (q e ) and amount of soption at time t (q t ) were calculated using Equations. 2 and 3, respectively [20].…”

“…Then, ltered using a 0.22 µm syringe lter (Jet Bio l), and the residual concentration of TC was measured at the maximum wavelength of 358 nm by UV/Vis spectrophotometer (Shimadzu 1800). We investigated the effective parameters on the adsorption process, including solution pH (3, 5, 6, 9, and 11) that adjusted with 0.1 M HCl or NaOH with a pH meter (HANNA 211), adsorbent dosage (60, 80, 100, 120, and 150 mg L −1 ), initial antibiotic concentration (5,10,15,20, and 30 mg L −1 ), contact time (20,40,60,90, and 120 min), and temperature of the solution (298, 303, 308, 313, and 318 K). The removal ef ciency of TC was calculated using Equation 1 [52].…”

“…Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R) isotherm models were employed to study isotherms of TC adsorption by Fe 3 O 4 @MC/APTMS at initial antibiotic concentrations of 5, 10, 15, 20, and 30 mg L −1 at 25 ºC. pseudorst order, pseudo-second order, Intraparticle, and Elovich were used to study the kinetics of TC adsorption by Fe 3 O 4 @MC/ APTMS at several contact times (5,10,15,20,40,60 and 90 min). To study the thermodynamic parameters of TC removal by Fe 3 O 4 @MC/APTMS at ve different temperatures (298, 303, 308, 318, and 328 K), Equations 4 and 5 were used.…”

“…It was reported that TC concentration in the wastewater released from aquaculture farms up to 20 mg L −1 [8]. Multiple methods have been reported to remove antibiotics including biological treatment [9], chlorination [10], advanced oxidation processes (AOPs) [11][12][13], electrochemical treatment [14], adsorption [3,[15][16][17][18][19][20], membrane processes [21], and ultrasonic cavitation effect method [22,23]. AOPs may cause the formation of recalcitrant and ecotoxic oxidation by-products, which hinder their usage in wastewater treatment plants [24].…”

Single and competitive adsorption of Cu2+ and Pb2+ by tea pulp from aqueous solutions

“…Among adsorbents, adsorption by activated carbon is an effective and safe method; activated carbon has some advantages such as high surface area, fine porous structure, uniform distribution of pore size, high porosity, high surface reactivity, high mechanical strength and strong adsorption capacity (12)(13)(14), but the high cost of using activated carbon method has forced researchers to study cheaper methods to replace this method. One of the alternative methods is the use of produced wastes in agriculture and plant wastes.…”