Magnetic multi-porous bio-adsorbent modified with amino siloxane for fast removal of Pb(II) from aqueous solution.

With the increasing concern about the sustainable chemistry, a fern plant-cyclosorus interruptus that contains plentiful multi-porous structure and puckered morphology can be considered as an ideal carrier to load various nanoparticles for synthesis of impressive functional materials. Herein, magnetic biomaterial was fabricated via coating a layer of 3-aminopropyltriethoxysilane (AS) on the surface of activated cyclosorus interruptus after incorporated with Fe 3 O 4 nanoparticles, and exhibited highly effective separation and impressive adsorption ability for lead ion from aqueous solution. Their morphology and property were investigated. Furthermore, the adsorption equilibrium isotherms, kinetics and thermodynamics of lead ion onto the magnetic biomaterial were studied to evaluate the performance of their practical application. These results indicated that the magnetic property of the prepared adsorbent could be easily tailored by adjusting the feedstock ratio, and these adsorption processes were endothermic and spontaneous reaction. The maximum adsorption capacity of lead ion on the bio-based magnetic adsorbent was 133.3 mg/g. The results of five successive adsorption/desorption cycles exhibited that all the adsorption abilities maintain above 90% of the original adsorption ability. [ABSTRACT FROM AUTHOR]