Adsorption capacity comparison between graphene oxide and graphene nanoplatelets for the removal of coloured textile dyes from wastewater

Assis, L.K.C.S.; Damasceno, Barbara Souza; Carvalho, Mário de Faria; Oliveira, Eveline Haiana Costa de; Ghislandi, Marcos Gomes

doi:10.1080/09593330.2019.1567603

Cited by 34 publications

(9 citation statements)

References 31 publications

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“…118 In the composite structure, the higher surface area of constituting GO with an amphiphilic nature is also able to remove colored dyes from the industrial effluents by strong interactions of its structural carboxylic and hydroxyl functional groups and the active functional groups of the molecules. 119 The presented research reports and the case study have clearly indicated that these nanocomposites possess high photocatalytic activity as compared to bare transition metal oxides in the dark as well as under both UV and visible light. Further they also demonstrate availability of active sites in the form of functional groups useful for anchoring transition metal oxides, charged dye molecules, and ions.…”

Section: Et Al Have Reported Mb Adsorption Capacities Of Barementioning

confidence: 65%

Water Challenges in South Asian Countries: A Focused Review on Emerging Nanomaterials and Technological Processes in Wastewater Treatment

2023

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South Asia, the world's most populated region, is facing many environmental and healthcare challenges due to poor freshwater management/wastewater treatment. Most South Asian (SA) countries, such as India, Pakistan, Sri Lanka, and Bangladesh, are suffering from water pollution issues generated due to domestic and industrial effluents containing heavy/toxic ions, textile dyes, pharmaceuticals, bacteria/viruses inorganic/organic pollutants, etc. To overcome these challenges, extensive research is being carried out with an emphasis on technological development to maintain water sustainability. The present review discusses water pollution as well as various challenges in SA countries along with solutions through scientific research carried out by developing nanomaterials and technological wastewater treatment processes, i.e., photocatalytic/adsorptive removal, disinfection, tracing/sensing, etc. Particularly, syntheses of TiO 2 nanoparticles and graphene oxide (GO)-based nanomaterials which were found to be most extensively investigated in the SA region have been discussed with emphasis on their multifunctional applications using various water treatment processes, mechanisms, and synergetic effects. Eventually, various challenging issues and solution opportunities are discussed for future development to maintain water sustainability in SA countries.

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Section: Et Al Have Reported Mb Adsorption Capacities Of Barementioning

confidence: 65%

Water Challenges in South Asian Countries: A Focused Review on Emerging Nanomaterials and Technological Processes in Wastewater Treatment

2023

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“…For oxidation treatment, the graphite nanoplatelets (XG Sciences) were refluxed with HNO 3 65% Fluka, for three hours. As-grown xGnP was added and mixed for one hour at 80 • C, then refluxed for three hours at 140 • C. These were washed after with ultrapure water to remove the free oxidants, dried at 80 • C and stored at 4 • C between experiments [50]. After the oxidation treatment with 65% HNO 3 , the acidic functionalities located at the edges modified the Van der Waals interactions between the sheets of graphite oxide, facilitating the determination of exfoliation.…”

Section: Oxidation Of Xgnpmentioning

confidence: 99%

Modified Exfoliated Carbon Nanoplatelets as Sorbents for Ammonium from Natural Mineral Waters

et al. 2021

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In this manuscript an improved sorbent based on modified exfoliated carbon nanoplatelets, applied in the removal of ammonium from aqueous samples, is presented. This sorbent showed better efficiency in comparison with the previous one obtained in our group for ammonium removal, the values of the maximum sorption capacity being improved from 10 to 12.04 mg/g. In terms of kinetics and sorption characteristic parameters, their values were also improved. Based on these results, a sorption mechanism was proposed, taking into account ion-exchange and chemisorption processes at the surface of the oxidized exfoliated carbon nanoplatelets. Future applications for simultaneous removal of other positive charged contaminants from natural waters might be possible.

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“…Otherwise, an anionic group (CH 3 COO − , SCN − , SO 4 2− , NO 3 − ) was able to attach to the hydrophobic graphene oxide. A previous study claimed that the higher surface area assisted the graphene oxide's ability to interact with direct blue Indosol dyes (a subcategory of anionic dyes) at pH < 4, due to several factors, such as the presence of hydroxyl, carboxylic, and oxygen groups, as well as the active sites on the dye particles, which may have resulted in stronger chemical bonds between the graphene oxide and the dyes [114]. Instead, Direct Red 81 was added to solutions with higher pH values (>7.5), resulting in nearly 100% removal.…”

Section: Locust Bean Gummentioning

confidence: 99%

The Application of Modified Natural Polymers in Toxicant Dye Compounds Wastewater: A Review

Ishak

Murshed

Akil

et al. 2020

Water

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The utilization of various types of natural and modified polymers for removing toxicant dyes in wastewater generated by the dye industry is reviewed in this article. Dye wastewater contains large amounts of metals, surfactants, and organic matter, which have adverse effects on human health, potentially causing skin diseases and respiratory problems. The removal of dyes from wastewaters through chemical and physical processes has been addressed by many researchers. Currently, the use of natural and modified polymers for the removal of dyes from wastewater is becoming more common. Although modified polymers are preferred for the removal of dyes, due to their biodegradability and non-toxic nature, large amounts of polymers are required, resulting in higher costs. Surface-modified polymers are more effective for the removal of dyes from the wastewater. A survey of 80 recently published papers demonstrates that modified polymers have outstanding dye removal capabilities, and thus have a high applicability in industrial wastewater treatment.

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Adsorption capacity comparison between graphene oxide and graphene nanoplatelets for the removal of coloured textile dyes from wastewater

Cited by 34 publications

References 31 publications

Water Challenges in South Asian Countries: A Focused Review on Emerging Nanomaterials and Technological Processes in Wastewater Treatment

Water Challenges in South Asian Countries: A Focused Review on Emerging Nanomaterials and Technological Processes in Wastewater Treatment

Modified Exfoliated Carbon Nanoplatelets as Sorbents for Ammonium from Natural Mineral Waters

The Application of Modified Natural Polymers in Toxicant Dye Compounds Wastewater: A Review

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