Adsorption of Cu(II), Cd(II), and Pb(II) from aqueous single metal solutions by mercerized cellulose and mercerized sugarcane bagasse chemically modified with EDTA dianhydride (EDTAD)

Abstract

a b s t r a c tThis work describes the preparation of new chelating materials derived from cellulose and sugarcane bagasse for adsorption of Cu 2+ , Cd 2+ , and Pb 2+ ions from aqueous solutions. The first part involved the mercerization treatment of cellulose and sugarcane bagasse with NaOH 5 mol/L. Non-and mercerized cellulose and sugarcane bagasse were then reacted with ethylenediaminetetraacetic dianhydride (EDTAD) in order to prepare different chelating materials. These materials were characterized by mass percent gain, X-ray diffraction, FTIR, and elemental analysis. The second part consisted of evaluating the adsorption capacity of these modified materials for Cu 2+ , Cd 2+ , and Pb 2+ ions from aqueous single metal solutions, whose concentration was determined by atomic absorption spectroscopy. These materials showed maximum adsorption capacities for Cu 2+ , Cd 2+ , and Pb 2+ ions ranging from 38.8 to 92.6 mg/g, 87.7 to 149.0 mg/g, and 192.0 to 333.0 mg/g, respectively. The modified mercerized materials showed larger maximum adsorption capacities than modified non-mercerized materials.

Adsorption of Brilliant Green onto Luffa Cylindrical Sponge: Equilibrium, Kinetics, and Thermodynamic Studies

“…Below pH 5.0, the carboxyl group on the surface of LFC gets protonated (H + ) making the number of positive charge sites increase and the number of negative charge decrease resulting in electrostatic repulsion, hence decrease in BGD uptake by LFC. With an increase in pH of the solution, these functional groups became deprotonated (COO − ), which resulted in an increase in the negative charge density on the LFC surface and facilitated the binding of BGD dyes [38]. Hence, the BGD ions binding to the adsorbent could be assumed to involve electrostatic interaction between cationic dyes and negatively charged COO − groups.…”

Functionalized SBA-15 mesoporous silica by melamine-based dendrimer amines for adsorptive characteristics of Pb(II), Cu(II) and Cd(II) heavy metal ions in batch and fixed bed column

“…Toxic heavy metals such as Pb(II), Cu(II) and Cd(II) in liquid effluents are considered persistent, non-biodegradable, bioaccumulative, thus they seriously threaten natural ecosystems and the health of human populations [1][2][3][4]. Many industries such as mining, textiles, painting, electroplating, refining and pesticides discharge their wastewater with various heavy metals content into aquatic ecosystems.…”

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

“…At the same time, some of them such as silver, copper and lead are precious and can be recycled and reused in varied applications (Anbia and Ghassemian 2011). Toxic heavy metals such as Pb(II) and Cu(II) in liquid effluents are considered as persistent, non-biodegradable, bioaccumulative and therefore seriously threaten natural ecosystems and the human health (Amini et al 2009;Gercel and Gerc 2007;Júnior et al 2009;Mureseanu et al 2008). Industries, such as mining and electroplating, discharge aqueous effluents containing high levels of heavy metals like uranium, mercury, cadmium, lead and copper (Reddad et al 2002;Gavrilescu 2004).…”