Adsorption of Cd(II), Cu(II), Ni(II) and Pb(II) onto natural bentonite: study in mono- and multi-metal systems

Lala clam (Orbicularia orbiculata) shell as an eco-friendly adsorbent for Cd(II), Cu(II) and Pb(II) ions

“…It can be seen that Pb(II) was the best adsorbed ion by lala clam shell. A similar trend was reported by Anna et al (2015) for the adsorption of Cd(II), Cu(II) and Pb(II) ions onto natural bentonite. Agbozu and Emoruwa (2014) reported that the amounts of Cd(II), Cu(II), Cr(VI), Fe(III) and Pb(II) ions removed increased with the decrease of the adsorption capacity when the amount of coconut husk used was increased.…”

“…This trend can be related to high concentration of H þ ions in acidic medium. At low pH values, the excessive H þ ions will likely to compete with metal ions for adsorption sites of adsorbent (Anna, Kleopas, Constantine, Anestis, & Maria, 2015;He, Chen, Tang, & Hu, 2016). On the other hand, when the solution pH was increased further, H þ ions were no longer dominant (less available).…”

“…Effect of adsorbent dosage. The adsorbent dosage significantly affect the capacity of the adsorbent for a given concentration of metal ion solution (Anna et al, 2015;Aziz et al, 2018). It is of fundamental importance to determine the adsorption capacity of the adsorbents prior to design and improve the adsorption system in real applications (Bakka et al, 2018).…”

Adsorption of silver from aqueous solution onto pre-treated bentonite clay: complete batch system evaluation

“…Among these alternative adsorbents, various groups of clays have been investigated, such as clinoptilolites (Çoruh et al, 2010), montmorillonites (Akar et al, 2009), smectites (Galindo et al, 2013), kaolinites (Wang et al, 2014), vermiculites (Tran et al, 2015), bentonites (Anna et al, 2015) and sepiolites (Padilla-Ortega et al, 2013). This material presents a high potential to adsorb heavy metals due to a number of characteristics e.g.…”

Basic Dye Adsorption onto Clay/MnFe2O4 Composite: A Mechanistic Study

“…More recently, the application of composites has gained the attention of the scientific community in view of various advantages (Duta and Visa, 2015;Liu et al, 2016). A composite is a combination of two or more components such as a reinforcing agent and a compatible matrix that offer excellent adsorption properties (Rangabhashiyam and Selvaraju, 2015) and to date clinoptilolites (Çoruh et al, 2010), montimorillonites (Akar et al, 2009), esmectites (Galindo et al, 2013), kaolinites (Wang et al, 2014) and bentonites (Anna et al, 2015) have been successfully employed as adsorption. Authors have correlated the enhanced adsorption of composites with physicochemical stability, high superficial area and cation exchange capacity of composites (Cantuaria et al, 2015).…”