Application and prospects of carbon nanostructured materials in water treatment: A review

Munirasu, Selvaraj; Hai, Abdul; Banat, Fawzi; Haija, Mohammad Abu

doi:10.1016/j.jwpe.2019.100996

Cited by 97 publications

(34 citation statements)

References 169 publications

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“…Due to its unique properties [3,4], carbon nanotubes and nanofibers are one of the most promising classes of NMs, which currently are in the growth phase of large-scale bulk production [5]. Carbon nanotubes were successfully used in electronics [6], catalysis [7,8], environmental purification [9,10], biomedicine [11,12], and other fields. Carbon nanofibers have an application in energy storage [13,14], electronics [15], catalysis [16,17], biosensing [18], etc.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Level and Mechanisms of Toxicity of Carbon Nanotubes, Carbon Nanofibers, and Silicon Nanotubes in Bioassay with Four Marine Microalgae

et al. 2020

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Nanoparticles (NPs) have various applications in medicine, cosmetics, optics, catalysis, environmental purification, and other areas nowadays. With an increasing annual production of NPs, the risks of their harmful influence to the environment and human health is rising. Currently, our knowledge about the mechanisms of interaction between NPs and living organisms is limited. Additionally, poor understanding of how physical and chemical characteristic and different conditions influence the toxicity of NPs restrict our attempts to develop the standards and regulations which might allow us to maintain safe living conditions. The marine species and their habitat environment are under continuous stress due to anthropogenic activities which result in the appearance of NPs in the aquatic environment. Our study aimed to evaluate and compare biochemical effects caused by the influence of different types of carbon nanotubes, carbon nanofibers, and silica nanotubes on four marine microalgae species. We evaluated the changes in growth-rate, esterase activity, membrane polarization, and size changes of microalgae cells using flow cytometry method. Our results demonstrated that toxic effects caused by the carbon nanotubes strongly correlated with the content of heavy metal impurities in the NPs. More hydrophobic carbon NPs with less ordered structure had a higher impact on the red microalgae P. purpureum because of higher adherence between the particles and mucous covering of the algae. Silica NPs caused significant inhibition of microalgae growth-rate predominantly produced by mechanical influence.

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Section: Introductionmentioning

confidence: 99%

Comparison of the Level and Mechanisms of Toxicity of Carbon Nanotubes, Carbon Nanofibers, and Silicon Nanotubes in Bioassay with Four Marine Microalgae

et al. 2020

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“…Graphene oxide (GO) has been considered especially preferable as nano-adsorbent for heavy metals. Along with its large surface area, the abundant presence of oxygen-containing functional groups, such as ketones, epoxides, carboxyl, and hydroxyl groups, have been pointed out as the main reasons for its high efficiency adsorbing metal ions [ 24 , 25 ]. Thus, pristine GO has been shown to adsorb several metal cations such as sodium (Na), magnesium (Mg), cobalt (Co), cadmium (Cd), copper (Cu), iron (Fe), nickel (Ni), lead (Pb), strontium (Sr), and zinc (Zn) [ 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide–ZnO Nanocomposites for Removal of Aluminum and Copper Ions from Acid Mine Drainage Wastewater

Rodríguez

Tapia

Leiva-Aravena

et al. 2020

IJERPH

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Adsorption technologies are a focus of interest for the removal of pollutants in water treatment systems. These removal methods offer several design, operation and efficiency advantages over other wastewater remediation technologies. Particularly, graphene oxide (GO) has attracted great attention due to its high surface area and its effectiveness in removing heavy metals. In this work, we study the functionalization of GO with zinc oxide nanoparticles (ZnO) to improve the removal capacity of aluminum (Al) and copper (Cu) in acidic waters. Experiments were performed at different pH conditions (with and without pH adjustment). In both cases, decorated GO (GO/ZnO) nanocomposites showed an improvement in the removal capacity compared with non-functionalized GO, even when the pH of zero charge (pHPZC) was higher for GO/ZnO (5.57) than for GO (3.98). In adsorption experiments without pH adjustment, the maximum removal capacities for Al and Cu were 29.1 mg/g and 45.5 mg/g, respectively. The maximum removal percentages of the studied cations (Al and Cu) were higher than 88%. Further, under more acidic conditions (pH 4), the maximum sorption capacities using GO/ZnO as adsorbent were 19.9 mg/g and 33.5 mg/g for Al and Cu, respectively. Moreover, the removal percentages reach 95.6% for Al and 92.9% for Cu. This shows that decoration with ZnO nanoparticles is a good option for improving the sorption capacity of GO for Cu removal and to a lesser extent for Al, even when the pH was not favorable in terms of electrostatic affinity for cations. These findings contribute to a better understanding of the potential and effectiveness of GO functionalization with ZnO nanoparticles to treat acidic waters contaminated with heavy metals and its applicability for wastewater remediation.

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“…About 22 different organic pollutants including phenols, substituted benzenes, and PAHs, have been considered and the findings confirmed positive correlations between the adsorption capacities of the CNTs based on their mesoporous surfaces to the properties of the pollutants [163]. A review on the prospects and applications of carbon nanostructured materials in water treatment was presented by Selvaraj et al (2020) [164]. Apur et al (2015) discussed the adsorption of organic pollutants including PAHs and phenols onto the CNTs [165].…”

Section: Graphene Graphene Oxides and Reduced Graphene Oxidesmentioning

confidence: 84%

An Overview and Evaluation of Highly Porous Adsorbent Materials for Polycyclic Aromatic Hydrocarbons and Phenols Removal from Wastewater

Zango

Sambudi

Jumbri

et al. 2020

Water

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Application and prospects of carbon nanostructured materials in water treatment: A review

Cited by 97 publications

References 169 publications

Comparison of the Level and Mechanisms of Toxicity of Carbon Nanotubes, Carbon Nanofibers, and Silicon Nanotubes in Bioassay with Four Marine Microalgae

Comparison of the Level and Mechanisms of Toxicity of Carbon Nanotubes, Carbon Nanofibers, and Silicon Nanotubes in Bioassay with Four Marine Microalgae

Graphene Oxide–ZnO Nanocomposites for Removal of Aluminum and Copper Ions from Acid Mine Drainage Wastewater

An Overview and Evaluation of Highly Porous Adsorbent Materials for Polycyclic Aromatic Hydrocarbons and Phenols Removal from Wastewater

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