Adsorption and Desorption of Heavy Metals from Water using Aminoethyl Reduced Graphene Oxide

2018 ◽  
Vol 35 (9) ◽  
pp. 978-987 ◽  
Author(s):  
Chao-Zhi Zhang ◽  
Yang Yuan ◽  
Ting Li
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Adsorption And Desorption ◽  
Reduced Graphene

scholarly journals Fe3O4/Reduced Graphene Oxide Nanocomposite: Synthesis and Its Application for Toxic Metal Ion Removal

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Nguyen Thi Vuong Hoan ◽  
Nguyen Thi Anh Thu ◽  
Hoang Van Duc ◽  
Nguyen Duc Cuong ◽  
Dinh Quang Khieu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Metal Ion ◽  
Magnetic Measurement ◽  
High Surface ◽  
X Ray ◽  
Reduced Graphene ◽  
Initial Graphite

The synthesis of reduced graphene oxide modified by magnetic iron oxide (Fe3O4/rGO) and its application for heavy metals removal were demonstrated. The obtained samples were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption isotherms, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), and magnetic measurement. The results showed that the obtained graphene oxide (GO) contains a small part of initial graphite as well as reduced oxide graphene. GO exhibits very high surface area in comparison with initial graphite. The morphology of Fe3O4/rGO consists of very fine spherical iron nanooxide particles in nanoscale. The formal kinetics and adsorption isotherms of As(V), Ni(II), and Pb(II) over obtained Fe3O4/rGO have been investigated. Fe3O4/rGO exhibits excellent heavy metal ions adsorption indicating that it is a potential adsorbent for water sources contaminated by heavy metals.

scholarly journals Evaluation of a Reduced Graphene Oxide-Sb Nanoparticles Electrochemical Sensor for the Detection of Cadmium and Lead in Chamomile Tea

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 53
Author(s):  
Erik W. Nunes ◽  
Martin K. L. Silva ◽  
Ivana Cesarino
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Reduced Graphene Oxide ◽  
Electrochemical Detection ◽  
Cadmium Ions ◽  
Reduced Graphene ◽  
The Individual ◽  
Cadmium And Lead

The development of electroanalytical sensors for heavy metals detection in complex matrices holds great interest. Herein, a sensor based on a reduced graphene oxide (rGO) modified with antimony nanoparticles (Sb) was developed for the electrochemical detection of divalent cadmium ions (Cd2+) and lead ions (Pb2+). The simultaneous determination of both metals covered a range of 0.1 to 3.0 µmol L−1, with limits of detection (LOD) of 70.03 and 45.50 nmol L−1 for Cd2+ and Pb2+, respectively. For the individual detection, LOD of 20.50 nmol L−1 (Cd2+) and 2.01 nmol L−1 (Pb2+) were found. The analytical performance of this new sensor in detecting both metals in chamomile tea samples was satisfactorily evaluated.

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