Competitive adsorption of Cd2+, Pb2+ and Ni2+ onto Fe3+-modified argillaceous limestone: Influence of pH, ionic strength and natural organic matters

Removal of Cd(II) and Cu(II) from Aqueous Solution by Na+-Modified Pisha Sandstone

“…e effect of pH on adsorption was attributed to facilitation or hinderance of electrostatic interactions on the ability of the electric charge density of the surface in aqueous solution. Furthermore, negatively charged active sites can promote Cd(II) and Cu(II) adsorption through the electrostatic attraction between PSs and heavy metal ions [14,40]. e current results revealed efficient adsorption of heavy metals at pH 5.0-6.0.…”

“…For example, Pádrová et al [12] found that the industrial synthetic adsorbents (e.g., Nanofer 25 and Nanofer 25S) are toxic to the soil microorganisms. erefore, natural adsorbents, naturally formed or derived from natural materials with insignificant risks to the environment, have attracted the attention of researchers again due to their noninvasive properties and low cost [13,14]. e mineral materials (montmorillonite, kaolinite, goethite, etc.)…”

Cd(ii) removal by Fe(ii) surface chemically modified layered double hydroxide–graphene oxide: performance and mechanism

“…21 This absence of additional peaks was due to the amorphous nature of the Fe-phases formed at LDH/GO surface sites, which was in line with the previous literatures. 20,29 The wide scan XPS spectrum of H-LDH-GO and LDH-GO@Fe(II) 10 composites are shown in Fig. 1(a).…”

“…[17][18][19] Iron-modied materials showed high affinity for metals due to their large surface area, microporous structure and internal surface. 20 Doula 21 synthesized clin-Fe by adding natural clinoptilolite in an iron nitrate solution under strongly basic condition, and the clin-Fe was proven for its ability to adsorb high concentration Cu(II). Yang et al 22 reported corn stalk-derived biochar impregnate with iron nanoparticles to serve as an adsorbent, which showed rapid removal and high performance in single and mixed metal solutions.…”

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte IX: Plomo(II))/H+/Amberlite IR-120

“…Thus, the removal of lead from liquid effluents has an interest of the uttermost importance, and this task had been recently investigated using primarily, ion exchange or adsorption of the metal by various materials (Alexander et al, 2018;Chanthapon et al, 2018;Chen et al, 2018;Chu et al, 2018;Cunha et al, 2018;El-Bahy, 2018;Elsherbiny, et al, 2018;Fang et al,. 2018;Feng et al, 2018;Georgescu et al, 2018;Gupta et al, 2018;Hayeeye et al, 2018;He et al, 2018;Huang and Wang, 2018;Kragović et al, 2018;Kinnarinen et al, 2018;Kulkarni et al, 2018;Li et al, 2018;Liu et al, 2018a;Liu et al, 2018b;Magrì et al, 2018;Quyen et al, 2018;Rajamohan et al, 2018;Rehman, et al, 2018;Rwiza et al, 2018;Sahmoune, 2018;Song et al, 2018;Tran et al, 2018;Wang et al, 2018a;Wang et al, 2018b;Yang et al, 2018;Ivanenko et al, 2018;Zhou et al, 2018;Zhu et al, 2018) liquid membranes (Ershad et al, 2018;Mesli and Belkhouche, 2018), and electrochemically (Oke et al, 2017).…”