Rapid and highly efficient removal of Eu(III) from aqueous solutions using graphene oxide

Hu, Baowei; Hu, Qingyuan; Li, Xue; Pan, Hui; Tang, Xiaoping; Chen, Chengguang; Huang, Chengcai

doi:10.1016/j.molliq.2016.12.030

Cited by 70 publications

(24 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the formal cation charge influences the adsorption-pH dependency, U(VI) adsorption decreased for pH > 7, presumably due to U(VI) carbonate complexation (Murphy et al, 1999). The removal of Eu(III) increases significantly from approximately 20% to > 90% in going from pH 2 to 8, and remains high above thereafter (Hu et al, 2017). During the Eu(III) adsorption process, the solution pH decreased slightly, indicating that hydrogen ions were released (Shao et al, 2009).…”

Section: Effects Of Water Qualitymentioning

confidence: 99%

“…Since numerous oxygen-containing functional groups (e.g., hydroxyl (-OH) and epoxy (C-O-C) groups on the basal plane, and carboxyl (-COOH) and carbonyl (-C=O) groups at the sheet edges) exist in the graphitic backbone of GOs (Kim et al, 2010), they may be described as a highly oxidized form of graphene. As such, they are attractive candidates for adsorption applications, and are well-suited to the adsorption of both inorganic/heavy metal (Dong et al, 2016;Dong et al, 2014;Hu et al, 2017;Li et al, 2012a; and organic contaminants Ersan et al, 2016;Jiao et al, 2017;Konicki et al, 2017b), due to their high oxygen-containing surface functionalities, large theoretical surface areas, and relatively high hydrophilicities (Zhou et al, 2012). rGOs, formed from the thermal, chemical, or electrochemical reduction of GOs to graphene-like sheets, are more defective and consequently less conductive than virgin graphenes (Dreyer et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aqueous removal of inorganic and organic contaminants by graphene-based nanoadsorbents: A review

et al. 2018

View full text Add to dashboard Cite

Various graphene-based nanoadsorbents, including graphenes, graphene oxides, reduced graphene oxides, and their nanocomposites, have been widely studied as potential adsorbents due to their unique physicochemical properties, such as structural variability, chemical strength, low density, and the possibility of large scale fabrication. Adsorption mechanisms are governed largely by the physicochemical properties of contaminants, the characteristics of nanoadsorbents, and background water quality conditions. This review summarizes recent comprehensive studies on the removal of various inorganic (mainly heavy metals) and organic contaminants by graphene-based nanoadsorbents, and also discusses valuable information for applications of these nanoadsorbents in water and wastewater treatment. In particular, the aqueous removal of various contaminants was reviewed to (i) summarize the general adsorption capacities of various graphene-based nanoadsorbents for the removal of different inorganic and organic contaminants, (ii) evaluate the effects of key water quality parameters such as pH, temperature, background major ions/ionic strength, and natural organic matter on adsorption, (iii) provide a comprehensive discussion of the mechanisms that influence adsorption on these nanoadsorbents, and (iv) discuss the potential regeneration and reusability of nanoadsorbents. In addition, current challenges and future research needs for the removal of contaminants by graphene-based nanoadsorbents in water treatment processes are discussed briefly.

show abstract

Section: Effects Of Water Qualitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aqueous removal of inorganic and organic contaminants by graphene-based nanoadsorbents: A review

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In recent years, persistent organic contaminants such as phenols, chlorophenols, chlorobenzenes, and pharmaceutical drugs [ 2 ], as well as heavy metals like As, Cd, Cu, Cr, Pb, Hg, and so forth, or radionuclides like Ra and actinides, are becoming more common in hydric resources. These have caught the interest of the scientific community due to their high toxicity, easy dispersion, bioaccumulation, and persistency in the environment [ 5 – 9 ], particularly for actinides, whose long half-life and high radiotoxicity pose a health risk since they can lead to various diseases such as poisoning, nervous system damage, and cancer [ 10 ]. The toxicity and behavior of persistent organic compounds depend on their concentration, molecular structure, and type of functional groups.…”

Section: Introductionmentioning

confidence: 99%

Titanium Pyrophosphate for Removal of Trivalent Heavy Metals and Actinides Simulated by Retention of Europium

Ortiz-Oliveros

Flores-Espinosa

Ordóñez-Regil

et al. 2017

The Scientific World Journal

View full text Add to dashboard Cite

This work addresses the synthesis of titanium pyrophosphate, as well as the characterization and evaluation of the sorption process of europium, for removal of trivalent heavy metals and actinides simulate. The evaluation of the surface properties of titanium pyrophosphate was carried out determining the surface roughness and surface acidity constants. The values obtained from the determination of the surface roughness of the synthesized solid indicate that the surface of the material presents itself as slightly smooth. The FITEQL program was used to fit the experimental titration curves to obtain the surface acidity constants: log⁡K+ = 3.59 ± 0.06 and log⁡K− = −3.90 ± 0.05. The results of sorption kinetics evidenced that the pseudo-order model explains the retention process of europium, in which the initial sorption velocity was 8.3 × 10−4 mg g−1 min−1 and kinetic constant was 1.8 × 10−3 g mg min−1. The maximum sorption capacity was 0.6 mg g−1. The results obtained from sorption edge showed the existence of two bidentate complexes on the surface.

show abstract

“…Both inner and outer surface complexation have been reported with HM removal on MoS 2 NCs and can be indicated by how strongly the sorption is influenced by pH and ionic strength. When the sorption is strongly affected by pH but not by the ionic strength, the sorption mechanism is predominantly inner-sphere surface complexation; conversely, outer-sphere surface complexation or ion exchange preponderates with the opposite case [132,133].…”

Section: Molybdenum Sulfidesmentioning

confidence: 99%

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Kromah

Zhang

2021

Water

View full text Add to dashboard Cite

Heavy metals pollution of aqueous solutions generates considerable concerns as they adversely impact the environment and health of humans. Among the remediation technologies, adsorption with metal sulfide nanomaterials has proven to be a promising strategy due to their cost-effective, environmentally friendly, surface modulational, and amenable properties. Their excellent adsorption characteristics are attributed to the inherently exposed sulfur atoms that interact with heavy metals through various processes. This work presents a comprehensive overview of the sequestration of heavy metals from water using metal sulfide nanomaterials. The common methods of synthesis, the structures, and the supports for metal sulfide nano-adsorbents are accentuated. The adsorption mechanisms and governing conditions and parameters are stressed. Practical heavy metal remediation application in aqueous media using metal sulfide nanomaterials is highlighted, and the existing research gaps are underscored.

show abstract

Rapid and highly efficient removal of Eu(III) from aqueous solutions using graphene oxide

Cited by 70 publications

References 74 publications

Aqueous removal of inorganic and organic contaminants by graphene-based nanoadsorbents: A review

Aqueous removal of inorganic and organic contaminants by graphene-based nanoadsorbents: A review

Titanium Pyrophosphate for Removal of Trivalent Heavy Metals and Actinides Simulated by Retention of Europium

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Contact Info

Product

Resources

About