Industrial wastewater remediation using Hematite@Chitosan nanocomposite

Abstract

The emission of heavy metals into the environment may be natural or anthropogenic (Taghipour and Mosaferi, 2013). Anthropogenic impacts including industrial discharge, domestic sewage, non-point source runoff and atmospheric precipitation are the main sources of toxic heavy metals that enter aquatic systems ﴾Langston et al., 1999﴿. Heavy metals are bio-accumulated in living organisms when taken up and stored more than softened (metabolized) or excreted (Gupta, 2013). Heavy metals toxicity has been reportable to be caused by completely different means; e.g., from contamination of drinking-water (Pb pipes), high air concentrations close to emission sources (thus enter into soil) or from food chain. The heavy metals are poisonous as the result of the bio-accumulation (Lenntech, 2012; Gupta, 2013 & Chibuike and Obiora, 2014). The Nile in Egypt facing major environmental problems associated with the dispersal or disposal of agricultural, industrial and urban wastes generated by human activities (Abdel-Mohsien and Mahmoud, 2015).

MnSb2O6‐chitosan nanocomposite: An efficient catalyst for the synthesis of coumarins via Pechmann reaction

“…The characteristic peak near 895 cm −1 , indicating the presence of metal‐C vibration bond. The above information confirmed the formation of MnSb 2 O 6 ‐chitosan nanocomposites …”

“…Figure B showed XRD patterns of MnSb 2 O 6 ‐chitosan nanocomposites. The nanocomposite has amorphous nature, and the strong characteristic diffraction peaks at 2θ = 27.69°, 35.21°, and 54.03° revealed that the MnSb 2 O 6 nanoparticles were successfully coated by amorphous chitosan “with peaks between 2θ of 10° and 15° with an amorphous structure of chitosan” …”

Retracted: Adsorption of Pb(II) and Cd(II) by magnetic chitosan‐salicylaldehyde Schiff base: Synthesis, characterization, thermal study and antibacterial activity

“…The as‐synthesized Fe 2 O 3 nanoparticles showed the average particle size of 33.5 nm. Surface morphology is an important parameter for adsorption capacity of heavy metal ions such as Pb(II), Cd(II) and Cu(II). [ 31,40,42–44 ] Figure 3 shows the SEM images of Fe 2 O 3 and ChS@Fe 2 O 3 . As seen in Figure 3a, the morphology of Fe 2 O 3 is irregular with well narrow size distribution.…”

“…[ 44 ] As seen in Figure 10, after 5 adsorption–desorption cycles, the maximum of removal Pb(II) and Cd(II) ions remained 88 and 72%, respectively, indicating that the ChS@Fe 2 O 3 is well adsorbent for Pb(II) and could be used repeatedly. [ 43,44,46,49 ]…”

Preparation, Characterization, and Application of Polyacrylamide‐Polystyrene/Bentonite Nanocomposite as an Effective Immobilizing Adsorbent for Remediation of Soil

“…Thus, an alternative solution is using a layered structure such as clay, which is highly available, and a high‐potential adsorbent . Note that mesoporous silica structures or layered structures alone do not possess the necessary productivity for absorbing heavy metals …”