Effective removal of Cu (II) ions from aqueous solution by amino-functionalized magnetic nanoparticles

Poly(dimethylsiloxane) and Poly[vinyltrimethoxysilane-co-2-(dimethylamino) ethyl methacrylate] Based Cross-Linked Organic-Inorganic Hybrid Adsorbent for Copper(II) Removal from Aqueous Solutions

“…Other similar studies [62][63][64] have also reported effective desorption of adsorbed metals in acidic conditions. Furthermore, adsorption-desorption cycles can be repeated to examine the reusability and metal recovery efficiency of the adsorbent.…”

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

“…Table 4 To determine whether the Pb(II) adsorption on magnetites was favorable or not for the Langmuir type adsorption process, the isotherm shape can be classified by a term ''R L '', a dimensionless constant separation factor, which is defined in Eq. (4) [34]:…”

“…Magnetite has been applied in the adsorption of various heavy metals, e.g., Cr(VI) [27], Hg(II) [28], As(V) [25], Sb(V) [29], Se(IV) [30] and U(VI) [31]. The adsorption mechanism includes surface site binding [32], electrostatic interaction [33], modified ligand combination [34] and oxidation-reduction interaction [35,36]. Some substitutions have made obvious variations on the physicochemical properties of magnetite surface [26,37].…”

Preparation and Adsorption Properties of Mesoporous Silica for Removal of Nonylphenolethoxylates Surfactant from Aqueous Solution

“…In another 250 ml beaker 7.5 g of sodium silicate was dissolve in 150 ml of distilled water and was added to the cocamidopropyl betaine in around bottom flask with stirring for 1 hour. Finally 35 ml of (1M) HNO 3 was added from burette to the mixture drop wise for 3 hours until the pH reach to (7). The white precipitate formed spontaneously and then it was recovered by filtration, washed, after aging for one day at 35˚C .The surfactant was removed by calcination at 600˚C for 4 hours.…”

“…Therefore, the mesoporous silica have received much attention for their practical applications such as: Drug delivery systems [3], Catalysis [4], Diagnostics [5], Chromatography [6], and Adsorbents [7].…”