Use of cerium oxide (CeO2) nanoparticles for the adsorption of dissolved cadmium (II), lead (II) and chromium (VI) at two different pHs in single and multi-component systems

doi:10.30955/gnj.001687

Cited by 32 publications

(4 citation statements)

References 13 publications

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“…Previous studies also demonstrated the uptake and accumulation of elemental Ce in plant tissues through direct uptake of both CeO 2 NPs and their dissolved ions. ,, Ebbs and colleagues investigated that dietary exposure of Ce from CeO 2 NPs or Ce ion exposed carrots and found that dietary intake of element Ce would not exceed the mean oral reference dose of this element in most realistic cases . However, an emerging topic concerning the CeO 2 NPs plant interactions is to understand the impact of CeO 2 NPs on the fate and transport of coexisting environmental pollutants. − …”

Section: Introductionmentioning

confidence: 99%

Investigation on the Modification of Physicochemical Properties of Cerium Oxide Nanoparticles through Adsorption of Cd and As(III)/As(V)

Sharifan

Wang

Guo

et al. 2018

ACS Sustainable Chem. Eng.

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Previous studies have demonstrated that engineered nanoparticles (ENPs) and metal(loid)s mutually affect their accumulation in plant tissues. Adsorption of metal(loid)s on ENPs is deemed as an important mechanism for their interactions. However, quantitative information on the extent of adsorption in environmentally relevant conditions is lacking. Information is also lacking on how the adsorption of metal(loid)s on ENPs may change the physicochemical properties of ENPs such as their size and zeta potential and consequently their plant uptake. This study measured the adsorption isotherms of Cd and As(III)/As(V) onto 100 mg L–1 cerium oxide nanoparticles (CeO2NPs) in both the presence and absence of synthetic root exudates (SRE) in batch reactors. The adsorption study was allowed to proceed for 48 h to ensure equilibrium. Addition of SRE lowered the pH of the mixture from around 5.9 to 2.3. Both As and Cd displayed strong adsorption on CeO2NPs at pH 5.9. The adsorption was drastically reduced at pH 2.3 without SRE. The presence of SRE mitigated the pH effect, but the adsorption of As and Cd was invariably lower at pH 2.3 than at pH 5.9, irrespective of the SRE. The interactions of metal(loid)s with CeO2NPs significantly increased the hydrodynamic size of some CeO2NPs to micrometer and significantly changed the zeta potential of these nanoparticles to the range of −10 to +10 mV. Different effects on CeO2NPs properties were noticed for Cd and As at different oxidation states. The results shed new lights on the reciprocal effect of CeO2NPs and these two metal(loid)s on their plant uptake and accumulation and demonstrated for the first time that coexisting heavy metal(loid)s may significantly alter the fate and accumulation of ENPs in plants.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Modification of Physicochemical Properties of Cerium Oxide Nanoparticles through Adsorption of Cd and As(III)/As(V)

Sharifan

Wang

Guo

et al. 2018

ACS Sustainable Chem. Eng.

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“…Cerium-based nanomaterials can also be affected by pH ranges. Contreras et al [31] reported that when cerium-based nanoparticles were used in an aqueous solution then its adsorption capacity was affected for the treatment of chromium and cadmium whereas unaffected in the case of lead treatment.…”

Section: Cerium Based Nanomaterialsmentioning

confidence: 99%

Nano-bioremediation of heavy metals from environment using a green synthesis approach

Aslam

Mazhar

2023

IJAAS

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<p><span>The quality of human life is compromised due to the increased concentration of toxic heavy metals in air, water, and soil which is directly interacted with living life. Exceed levels of Cr, Cd, Cu, As, Zn, Pb, and Hg influence the living chain and not only causes human damage but also greatly effects animals, plants, and microorganisms. The consistent increase in drawbacks of traditional methods makes them a poor choice for the remediation of heavy metals. In comparison to that, the use of advanced technology at nano levels gives promising results. Many nanomaterials such as carbon nanotubes, nanofibers, nanoflowers, and nanoadsorbents of different metals such as copper, titanium, zinc, gold, silver, iron, cerium, and manganese use along with different biological materials increase the nano-bioremediation rate in the field of science and pose industrial and environmental applications. Being a cost-effective, eco-friendly, controllable nature of nano-bioremediation technology, they lack background knowledge, and handling at the commercial level. This review highlights different types of nanomaterials, how they are implemented in different application, their green synthesis approach, and the boon and bane of using nano-bioremediation technology in real-time.</span></p>

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“…Another class of material that has been widely studied as adsorbents is inorganic nanoparticles (iNPs), which exhibit high activity and specificity toward heavy-metal ions. , For example, cerium oxide (CeO 2 ) NPs have exhibited excellent adsorption capacities for the following metal ions in water: Pb(II) (128 mg/g), Cr(VI) (122 mg/g), Cd(II) (93 mg/g), and As(V) (17 mg/g). − Importantly, some iNPs can be easily magnetically retrieved from solution, thus obviating impractical alternatives such as filtering. However, a drawback of iNPs is their tendency to aggregate, which significantly compromises their adsorption efficiency.…”

Section: Introductionmentioning

confidence: 99%

MOF-Beads Containing Inorganic Nanoparticles for the Simultaneous Removal of Multiple Heavy Metals from Water

Boix

Troyano

Garzón‐Tovar

et al. 2020

ACS Appl. Mater. Interfaces

110

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Pollution of water with heavy metals is a global environmental problem whose impact is especially severe in developing countries. Among water-purification methods, adsorption of heavy metals has proven to be simple, versatile and cost-effective. However, there is still a need to develop adsorbents with a capacity to remove multiple metal pollutants from the same water sample. Herein we report the complementary adsorption capacities of metal-organic frameworks (MOFs; here, UiO-66 and UiO-66(SH)2) and inorganic nanoparticles (iNPs; here, cerium-oxide NPs) into composite materials. These adsorbents, which are spherical microbeads generated in one step by continuous-flow spray-drying, efficiently and simultaneously remove multiple heavy metals from water, including As(III and V), Cd(II), Cr(III and VI), Cu(II), Pb(II) and Hg(II). We further show that these microbeads can be used as packing material in a prototype of a continuous-flow water treatment system, in which they retain their metal-removal capacities upon regeneration with a gentle acidic treatment. As proof-of-concept, we evaluated these adsorbents for purification of laboratory water samples prepared to independently recapitulate each of two strongly-polluted rivers: the Bone (Indonesia) and Buringanga (Bangladesh) rivers. In both cases, our microbeads reduced the levels of all the metal contaminants to below the corresponding permissible limits established by the World Health Organization (WHO). Moreover, we demonstrated the capacity of these microbeads to lower levels of Cr(VI) in a water sample collected from the Sarno River (Italy). Finally, to create adsorbents that could be magnetically recovered following their use in water purification, we extended our spraydrying technique to simultaneously incorporate two types of iNPs (CeO2 and Fe3O4) into UiO-66(SH)2, obtaining CeO2/Fe3O4@UiO-66-(SH)2 microbeads that adsorb heavy metals and are magnetically responsive.water by a magnet. Given their ready formation and tunability, we are confident that such iNP@MOF-Beads will prove utile in future water-purification applications.

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Use of cerium oxide (CeO2) nanoparticles for the adsorption of dissolved cadmium (II), lead (II) and chromium (VI) at two different pHs in single and multi-component systems

Cited by 32 publications

References 13 publications

Investigation on the Modification of Physicochemical Properties of Cerium Oxide Nanoparticles through Adsorption of Cd and As(III)/As(V)

Investigation on the Modification of Physicochemical Properties of Cerium Oxide Nanoparticles through Adsorption of Cd and As(III)/As(V)

Nano-bioremediation of heavy metals from environment using a green synthesis approach

MOF-Beads Containing Inorganic Nanoparticles for the Simultaneous Removal of Multiple Heavy Metals from Water

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