Highly efficient simultaneous adsorption of Cd(ii), Hg(ii) and As(iii) ions from aqueous solutions by modification of graphene oxide with 3-aminopyrazole: central composite design optimization

2017 ◽  
Vol 41 (17) ◽  
pp. 8905-8919 ◽  
Author(s):  
M. Alimohammady ◽  
M. Jahangiri ◽  
F. Kiani ◽  
H. Tahermansouri
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Central Composite Design ◽  
Heavy Metal Ions ◽  
Simultaneous Adsorption ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Central Composite

Efficient simultaneous adsorption of heavy metal ions from solutions by modified graphene oxide with 3-aminopyrazole using central composite design modeling.

Poly(amidoamine) modified graphene oxide as an efficient adsorbent for heavy metal ions

2013 ◽  
Vol 4 (6) ◽  
pp. 2164 ◽  
Author(s):  
Yang Yuan ◽  
Guanghui Zhang ◽  
Yang Li ◽  
Guoliang Zhang ◽  
Fengbao Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Efficient Adsorbent

scholarly journals Chitosan/Graphene Oxide Nanocomposite Membranes as Adsorbents with Applications in Water Purification

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1687 ◽  
Author(s):  
Alexa-Maria Croitoru ◽  
Anton Ficai ◽  
Denisa Ficai ◽  
Roxana Trusca ◽  
Georgiana Dolete ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Inductively Coupled Plasma ◽  
Heavy Metal Ions ◽  
Ethylenediaminetetraacetic Acid ◽  
Composite Membranes ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

The scope of this article is to develop composite membranes using chitosan (CS) and graphene oxide (GO) as adsorbents for the removal of inorganic pollutants such as heavy metal ions, particularly Pb2+, from aqueous solutions. GO was obtained by modified Hummers method and blended with CS solution. The introduction of ethylenediaminetetraacetic acid (EDTA) compound to CS/GO suspension lead to an increased adsorption capacity of CS/GO for the elimination of heavy metals by forming stable chelates with them. The synthesized membranes were examined by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the adsorption behaviour of Pb2+ from aqueous solutions using CS/EDTA/GO membranes was evaluated using inductively coupled plasma mass spectrometry (ICP-MS). The adsorption performance of Pb2+ ions was studied by monitoring the concentration of Pb2+ against the adsorption period at an initial content of the adsorbent. The maximum adsorption efficiency of Pb2+ metal ions reached 767 mg·g−1 for CS/EDTA/GO 0.1%, 889 mg·g−1 for CS/EDTA/GO 0.3%, 970 mg·g−1 for CS/EDTA, 853 mg·g−1 for CS and 1526 mg·g−1 for GO. These findings show promising potential for CS/EDTA/GO membranes as effective adsorbent materials for the removal of heavy metal ions in water.

scholarly journals Correction: Highly efficient simultaneous adsorption of Cd(ii), Hg(ii) and As(iii) ions from aqueous solutions by modification of graphene oxide with 3-aminopyrazole: central composite design optimization

2019 ◽  
Vol 43 (48) ◽  
pp. 19437-19437 ◽  
Author(s):  
M. Alimohammady ◽  
M. Jahangiri ◽  
F. Kiani ◽  
H. Tahermansouri
Keyword(s):  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Central Composite Design ◽  
Design Optimization ◽  
Simultaneous Adsorption ◽  
Highly Efficient ◽  
Central Composite

Correction for ‘Highly efficient simultaneous adsorption of Cd(ii), Hg(ii) and As(iii) ions from aqueous solutions by modification of graphene oxide with 3-aminopyrazole: central composite design optimization’ by M. Alimohammady et al., New J. Chem., 2017, 41, 8905–8919.

Preparation of graphene oxide–montmorillonite nanocomposite and its application in multiple-pollutants removal from aqueous solutions

2019 ◽  
Vol 79 (2) ◽  
pp. 323-333 ◽  
Author(s):  
Chengyu Zhang ◽  
Jingde Luan ◽  
Wei Chen ◽  
Xin Ke ◽  
Haijun Zhang
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Organic Contaminants ◽  
Contact Time ◽  
Heavy Metal Ions ◽  
Crosslinking Agent ◽  
Experimental Studies ◽  
Contact Temperature ◽  
Simultaneous Adsorption

Abstract It is of interest to develop a novel fabrication method of a mineral adsorbent for wastewater treatment to remove the combination of heavy metal ions and refractory organic contaminants. The crosslinking agent stearyl trimethyl ammonium chloride was added into a suspension of montmorillonite and graphene oxide to implement their recombination to fabricated graphene oxide–montmorillonite nanocomposite (GMN). The fabricated nanocomposite was characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis and zeta potential. Results indicated that GMN exhibited a honeycomb texture, providing the chemical reaction site for the simultaneous adsorption of Pb2+ and p-nitrophenol (PNP). Factors including pH value, contact time, contact temperature and GMN dosage in the adsorption process were crucial for both Pb2+ adsorption and PNP adsorption. The optimum adsorption capacities of Pb2+ and PNP onto GMN were 19.39 mg·g−1 and 14.90 mg·g−1 under the condition of pH = 6, contact temperature 55 °C, contact time 60 min and GMN dosage 0.10 g, respectively. Data from experimental studies on simultaneous adsorption was well described by the pseudo-second-order model. The implementation of this work shows that GMN is a promising material for application in the simultaneous removal of heavy metal ions and refractory organic contaminants.

Sign in / Sign up

Export Citation Format

Share Document