Advent of Graphene Oxide and Carbon Nanotubes in Removal of Heavy Metals from Water: A Review

2020 ◽  
pp. 209-224
Author(s):  
Satyajit Chaudhuri ◽  
Spandan Ghosh
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Removal Of Heavy Metals

Removal of Heavy Metals from Wastewater Using Carbon Nanotubes

2013 ◽  
Vol 43 (4) ◽  
pp. 311-338 ◽  
Author(s):  
N. M. Mubarak ◽  
J. N. Sahu ◽  
E. C. Abdullah ◽  
N. S. Jayakumar
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotubes ◽  
Removal Of Heavy Metals

Recent trends in the synthesis of graphene and graphene oxide based nanomaterials for removal of heavy metals — A review

2018 ◽  
Vol 66 ◽  
pp. 29-44 ◽  
Author(s):  
Jihn Yih Lim ◽  
N.M. Mubarak ◽  
E.C. Abdullah ◽  
Sabzoi Nizamuddin ◽  
Mohammad Khalid ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Removal Of Heavy Metals ◽  
Recent Trends

Removal of heavy metals in aquatic environment by graphene oxide composites: a review

2019 ◽  
Vol 27 (1) ◽  
pp. 190-209 ◽  
Author(s):  
Quan Zhang ◽  
Qinxuan Hou ◽  
Guanxing Huang ◽  
Qi Fan
Keyword(s):  
Heavy Metals ◽  
Graphene Oxide ◽  
Aquatic Environment ◽  
Removal Of Heavy Metals ◽  
Oxide Composites

scholarly journals Comparing the Adsorption Performance of Multiwalled Carbon Nanotubes Oxidized by Varying Degrees for Removal of Low Levels of Copper, Nickel and Chromium(VI) from Aqueous Solutions

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 723 ◽  
Author(s):  
Marko Šolić ◽  
Snežana Maletić ◽  
Marijana Kragulj Isakovski ◽  
Jasmina Nikić ◽  
Malcolm Watson ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotubes ◽  
Aqueous Solutions ◽  
Multiwalled Carbon Nanotubes ◽  
Electrostatic Interactions ◽  
Positive Impact ◽  
Molar Ratio ◽  
Multiwalled Carbon ◽  
Removal Of Heavy Metals ◽  
Low Levels

Functionalized multiwalled carbon nanotubes (MWCNTs) have drawn wide attention in recent years as novel materials for the removal of heavy metals from the aquatic media. This paper investigates the effect that the functionalization (oxidation) process duration time (3 h or 6 h) has on the ability of MWCNTs to treat water contaminated with low levels of Cu(II), Ni(II) and Cr(VI) (initial concentrations 0.5–5 mg L−1) and elucidates the adsorption mechanisms involved. Adsorbent characterization showed that the molar ratio of C and O in these materials was slightly lower for the oxMWCNT6h, due to the higher degree of oxidation, but the specific surface areas and mesopore volumes of these materials were very similar, suggesting that prolonging the functionalization duration had an insignificant effect on the physical characteristics of oxidized multiwalled carbon nanotubes (oxMWCNTs). Increasing the Ph of the solutions from Ph 2 to Ph 8 had a large positive impact on the removal of Cu(II) and Ni(II) by oxMWCNT, but reduced the adsorption of Cr(VI). However, the ionic strength of the solutions had far less pronounced effects. Coupled with the results of fitting the kinetics data to the Elowich and Weber–Morris models, we conclude that adsorption of Cu(II) and Ni(II) is largely driven by electrostatic interactions and surface complexation at the interface of the adsorbate/adsorbent system, whereas the slower adsorption of Cr(VI) on the oxMWCNTs investigated is controlled by an additional chemisorption step where Cr(VI) is reduced to Cr(III). Both oxMWCNT3h and oxMWCNT6h have high adsorption affinities for the heavy metals investigated, with adsorption capacities (expressed by the Freundlich coefficient KF) ranging from 1.24 to 13.2 (mg g−1)/(mg l−1)n, highlighting the great potential such adsorbents have in the removal of heavy metals from aqueous solutions.

Application of Functionalized Nanomaterials as Effective Adsorbents for the Removal of Heavy Metals from Wastewater: A Review

2020 ◽  
Vol 17 (1) ◽  
pp. 4-22
Author(s):  
Saifeldin M. Siddeeg ◽  
Mohamed A. Tahoon ◽  
Norah S. Alsaiari ◽  
Muhamad Shabbir ◽  
Faouzi B. Rebah
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Graphene Oxide ◽  
Engineered Nanomaterials ◽  
Complete Analysis ◽  
Toxic Heavy Metals ◽  
Metals Removal ◽  
Functionalized Nanomaterials ◽  
Metal Selectivity ◽  
Removal Of Heavy Metals

Background: Nanomaterials offer promising remediation techniques for water containing toxic pollutants especially heavy metals. Method: A complete analysis of the application of nano-adsorbents for heavy metals removal from water has been reviewed. The effect of their functionalization on the adsorption capacity, the reusability, and the surface area has also been discussed. Result: In particular, the focus was on the applications of graphene oxide, carbon, silica, titanium dioxide, and iron oxide for water treatment. Additionally, the effect of functional groups on heavy metal selectivity has been discussed as well. Conclusion: This article will provide environmental engineers and academicians with information related to the latest engineered nanomaterials employed for the treatment of wastewater containing toxic heavy metals.

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