Treatment of Aqueous Solution of Lead Content by using Natural Mixture of Kaolinite-Albite-Montmorillonite-Illite Clay

Physicochemical characterization of three natural clays used as adsorbent for the humic acid removal from aqueous solution

“…Specific surface area values for clays studied are lower than those of Bikougou (170 m 2 /g, Eba et al., 2011) and higher than those of Mengono (10.9–21.2 m 2 /g, (Boulingui et al, 2015), or than commercials clays, Kaolinite (1.96 m 2 /g), Smectite (19.09 m 2 /g) (Zhang et al., 2012); Kaolinite KGa-2 (19.3 m 2 /g), Montmorillonite (23.3 m 2 /g) (Chen et al., 2017).…”

“…The SiO 2 /Al 2 O 3 ratios, ranging from 1.34 to 2.00, are lower than those of Bikougou (2.21, Eba et al., 2011), or for bentonite (2.74, Vojkan et al., 2017) or also for K1 and K2 (3.37 and 2.73 respectively, Kpangni et al., 2008).…”

Development and characterization of a novel l-asparaginase/MWCNT nanobioconjugate

“…The Freundlich isotherm is characterized by an exponential distribution of heterogeneous active sites leading to a multilayer adsorption. 53 The lowest correlation coefficient observed in the Freundlich isotherm tting shows that the formation of ASNase multilayers on the MWCNTs probably does not occur. On the other hand, according to the Langmuir isotherm, where a monolayer adsorption on the support surface is predicted, the MWCNTs maximum adsorption capacity (q max ) for ASNase is 148.0 U g À1 and the adsorption equilibrium constant (K), which denes the interactions strength between the enzyme and the surface of MWCNTs is 7.3 mL g À1 .…”

Performance of composite mineral adsorbents for removing Cu, Cd, and Pb ions from polluted water

“…2). Feldspar is reported to have a heavy metal adsorption capacity 39–41 . Clinoptilolite, with the chemical formula of (Na,K) 64 Al 6 Si 30 O 72 ·nH 2 O, one of most abundant natural zeolites, is found in sedimentary rocks of volcanic origin and occurs with silicate minerals such as feldspar, quartz, other zeolites (members of the tectosilicates subclass), clays (members of the phyllosilicates subclass), and volcanic glass 42 .…”