Chromium Removal from Industrial Water Through Functionallized Nanoparticles

Abstract

Cr ion-polluted industrial water was treated with commercial activated carbon and with either mercaptane- and amine-functionallized silica nanoparticles, revealing that the use of relatively low surface area materials can advantageously compete with high surface area materials, traditionally utilized for removing hazardous metal ions, provided a proper surface functionalization of the nanoparticles is in place. FTIR and SEM characterization of the different materials and stages of the experiments are provided, as well.

Magnesium dititanate (MgTi2O5) with pseudobrookite structure: a review

“…Studies on MgTi 2 O 5 mainly focused on basic properties such as cation order-disorder [10] and anisotropic thermal expansion [11] as well as applications as thermistor [12], white pigment [13], catalyst [14], photocatalyst [15], and so on. MgTi 2 O 5 is used as a 'pseudobrookite-phase stabilizer' for Al 2 TiO 5 .…”

Citrate-Coated Gold Nanoparticles As Smart Scavengers for Mercury(II) Removal from Polluted Waters

“…The high adsorption capacity of nanomaterials for certain pollutants has been demonstrated in many cases. For example, heavy metals have been effectively removed from contaminated water, as in the cases of Cr(VI) employing maghemite NPs, Cr(III) with silica NPs, or Hg(II) with alumina NPs . In addition, the magnetic properties of iron oxide NPs have been employed for the elimination of As(III) and As(V) from drinking water supplies, which involves the formation of weak arsenic–iron oxide complexes at the NP surface. , Alternatively, specific functionalization can also be used on semiconductor systems to trap organic molecules and then promote their complete degradation making use of the photocatalytic properties .…”

Common Strategies and Technologies for the Ecosafety Assessment and Design of Nanomaterials Entering the Marine Environment

“…In this context, the high adsorption capacity of ENMs for certain pollutants has been demonstrated in many cases. There are a variety of examples in the literature that exploit the use of NPs for the removal of heavy metals from aqueous solutions, such as using β-FeO(OH) nanocrystals to remove As(V), SiO 2 NPs for removal of Cr(III), as well as Al 2 O 3 NPs and supported Au NPs on alumina and as colloids, for removal of Hg(II). Although the ability of inorganic NPs to trap pollutants is best known for cations of elements such as the previous and Ni(II) and Cd(II), they can also be functionalized to trap organic molecules specifically and/or to act as photocatalysts to promote the complete degradation of toxic organic matter.…”