Heavy metal removal from aqueous solution by advanced carbon nanotubes: Critical review of adsorption applications

Activated Carbon, Carbon Nanotubes and Graphene: Materials and Composites for Advanced Water Purification

“…Available surface area and surface functional groups are the key determining factors that influence this improved adsorption and these parameters have been the focus of much research [121]. The use of CNTs to remove heavy metals from water is one of the most widely investigated applications in this field [122]. The filtration and removal of organic contaminants including dyes, DOM and pharmaceuticals by CNTs has also garnered increased interest in recent times [113,[123][124][125].…”

Synthesis and Potential Adsorption of Fe3O4@C Core-Shell Nanoparticles for to Removal of Pollutants in Aqueous Solutions: A Brief Review.

“…Fe 3 O 4 @C core-shell nanoparticles consist of a magnetic core and carbon coating (Figures 1-3), owing its importance to characteristics such as high adsorption, easy magnetic separation and regeneration capacity [12,[15][16][17][18][19][20][21][22][23][24].…”

“…Several works in the literature show the magnetic separation capacity of Fe 3 O 4 @C core-shell nanoparticles and their application in various effluent treatments [12,[17][18][19][20][21][22][23][24]. Wu et al [17] stated in their study that easy separation is the major priority of magnetic adsorbents.…”

Removal of Hg2+ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

“…Various kinds of methods have been used to remove heavy metals from aqueous solutions including ion exchange, chemical precipitation, biological treatment, membrane filtration and adsorption [9]. Recently carbon nanotubes (CNTs), as adsorbents in the field of environment, have attracted more and more attention, because of their unique structure and chemical properties [10][11][12].…”

“…Researches have shown that the surface functional groups such as amino [18,19], carboxyl [20,21], hydroxy [20,21] and thiol [19,[22][23][24] on carbon nanotubes can greatly improve their adsorption capacity for metal ions. Moreover, various aqueous environment relevant factors including pH, ionic strength and natural organic matter (NOM) can affect the adsorption of metal ions onto MWCNTs [12,13,20,[25][26][27]. To assess the efficiency of MWCNTs as absorbents to removal of Hg 2+ and MeHg in waters, it is of great importance to understand the effects of NOM and other environmental factors on the sorption of Hg 2+ and MeHg to functionalized MWCNTs.…”