Removal of Zinc from Aqueous Solutions by Magnetite Silica Core-Shell Nanoparticles

Table 2

Important parameters of several adsorption systems for removal of Zn(II) from aqueous solutions.

Adsorbent	Maximum adsorption capacity (mg g^-1)	Equilibrium time (min)	Reusability	Reference
Alternanthera philoxeroides biomass	18.57	60	Not reported	[39]
Native Lentinus edodes pellets	37.7
Inactive Lentinus edodes pellets	63.3	120	Not reported	[45]
Lewatit MonoPlus M 600	80.64
Lewatit MonoPlus MP 500	18.01
Lewatit MonoPlus MP 64	24.44	20	Retained about 95% of its initial efficiency after 10 cycles	[9]
Amberlite IRA 402	31.94
Hybrid precursor of silicon and carbon	28.76	30	Not reported	[46]
Sulfuric acid-treated rice husk (dry sorbent)	18.94
Sulfuric acid-treated rice husk (wet sorbent)	19.38	120	Not reported	[47]
Lemon peel	27.86
Lemon peel cellulose (LPC)	112.36	600	Not reported	[48]
Surface-modified LPC (LPCACS)	222.22
Amidoximated polyacrylonitrile/organobentonite composite	65.40	90–180	Retained about 85% of its initial efficiency after 4 cycles	[49]
Magnetic hydroxyapatite nanoparticles	140.6	576	Desorption efficiency in first cycle 67%	[50]
Magnetic nanoparticles coated with silica	119	20	Retained about 93% of its initial efficiency after 7 cycles	This work