A novel nanobiosorbent of functionalized graphene quantum dots from rice husk with barium hydroxide for microwave enhanced removal of lead (II) and lanthanum (III)

Mahmoud, Mohamed E.; Fekry, Nesma A.; Abdelfattah, Amir M.

doi:10.1016/j.biortech.2019.122514

Cited by 80 publications

(17 citation statements)

References 45 publications

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“…The carboxylated jute stick-derived activated carbon's maximum adsorption capacity for Pb 2+ was reported to be 2079 mg/g (Aziz et al 2019 ). Several studies used the rice husk-based adsorbents in removing Pb 2+ ions (Abdel-Ghani et al 2007 ; Amen et al 2020 ; Arabahmadi and Ghorbani 2017 ; Feng et al 2004 ; Fooladgar et al 2019 ; Gupta et al 2009 ; Janyasuthiwong et al 2015 ; Kamari et al 2019 ; Mahmoud et al 2020 ; Masoumi et al 2016 ; Masoumi et al 2016 ; Naiya et al 2009 ; Nnaji et al 2017 ; Shi et al 2019 ; Sun et al 2019 ; Wang et al 2018 ; Zulkali et al 2006 ), which showed the maximum adsorption capacity in the range of 5.7–1665.0 mg/g (Table 4 ). The rice husk ash showed an adsorption capacity of 91.7 mg/g, and the maximum removal efficiency was 99.3% (Naiya et al 2009 ).…”

Section: Technologies For Lead Removalmentioning

confidence: 99%

“…In addition, the adsorption capacity decreased only 10% after the 5 th cycle of regeneration (Kamari et al 2019 ). In another work, rice husk was used to synthesize graphene quantum dots (GQDOs) with 2D morphology and further chemically modified with Ba(OH) 2 to increase the number of surface hydroxyl groups (GQDOs-Ba) (Mahmoud et al 2020 ). The GQDOs were listed as low-cost and low-toxicity compounds.…”

Section: Technologies For Lead Removalmentioning

confidence: 99%

“…The GQDOs-Ba had high thermal stability (50 and 800 °C). The maximum adsorption capacity and removal efficiency of GQDOS-Ba was 748.5 mg/g and 99.8%, respectively (Mahmoud et al 2020 ). The equilibrium was reached within 15 s while the samples were microwaved under constant temperature (Mahmoud et al 2020 ).…”

Section: Technologies For Lead Removalmentioning

confidence: 99%

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Removal of lead ions (Pb2+) from water and wastewater: a review on the low-cost adsorbents

Chowdhury

Chowdhury²,

Mazumder³

et al. 2022

Appl Water Sci

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The presence of lead compounds in the environment is an issue. In particular, supply water consumption has been reported to be a significant source of human exposure to lead compounds, which can pose an elevated risk to humans. Due to its toxicity, the International Agency for Research on Cancer and the US Environmental Protection Agency (USEPA) have classified lead (Pb) and its compounds as probable human carcinogens. The European Community Directive and World Health Organization have set the maximum acceptable lead limits in tap water as 10 µg/L. The USEPA has a guideline value of 15 µg/L in drinking water. Removal of lead ions from water and wastewater is of great importance from regulatory and health perspectives. To date, several hundred publications have been reported on the removal of lead ions from an aqueous solution. This study reviewed the research findings on the low-cost removal of lead ions using different types of adsorbents. The research achievements to date and the limitations were investigated. Different types of adsorbents were compared with respect to adsorption capacity, removal performances, sorbent dose, optimum pH, temperature, initial concentration, and contact time. The best adsorbents and the scopes of improvements were identified. The adsorption capacity of natural materials, industrial byproducts, agricultural waste, forest waste, and biotechnology-based adsorbents were in the ranges of 0.8–333.3 mg/g, 2.5–524.0 mg/g, 0.7–2079 mg/g, 0.4–769.2 mg/g, and 7.6–526.0 mg/g, respectively. The removal efficiency for these adsorbents was in the range of 13.6–100%. Future research to improve these adsorbents might assist in developing low-cost adsorbents for mass-scale applications.

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Section: Technologies For Lead Removalmentioning

confidence: 99%

Section: Technologies For Lead Removalmentioning

confidence: 99%

See 1 more Smart Citation

Removal of lead ions (Pb2+) from water and wastewater: a review on the low-cost adsorbents

Chowdhury

Chowdhury²,

Mazumder³

et al. 2022

Appl Water Sci

View full text Add to dashboard Cite

show abstract

“…Mahmoud ME et al, 2020, [56] suggested synthesizing GQDs through rice husk carried out in two stages. Firstly, rice husk was turned into carbon ash by drying and treating under N 2 atmosphere at 700°C for 2 hrs.…”

Section: Rice Huskmentioning

confidence: 99%

Development of Graphene Quantum Dots by Valorizing the Bioresources – A Critical Review

et al. 2021

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Graphene Quantum Dots (GQDs) are carbon-based, nanoscale particles that display remarkable physical and organic properties. They are chemically and physically stable and eco-friendly due to their non-toxic and biologically inert nature. Various bioresources are used to synthesize GQDs to ensure biosafety and cost-effectiveness. In this work, a critical review has been done by focusing on top-down and bottom-up synthesis strategies. GQDs by valorizing various bioresources like bam-boo, neem leaves, mango leaves, paper fibers, rice husk, starch, honey, wood charcoal, coffee grounds, corn powder, and lime oil extract is highlighted in the present review. State-of-the-art and future outlooks on the development and advancement of GQDs applications are also being addressed. Based on the surveyed literature, GQDs provide extensive use in various areas like bioimaging, nanomedicine, photocatalysis, lightemitting diodes, solar cells, and sensors.

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“…The adsorption ability is dominant in the properties of adsorbents. For this perspective, extensive attention has been focused on developing novel adsorbents with high capacity, distinctive selectivity, and cost-effectiveness. − …”

Section: Introductionmentioning

confidence: 99%

Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution

et al. 2020

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A spherical cellulose-based adsorbent (2-AMP resin) functionalized by 2-aminomethyl-pyridine was prepared via the radiation grafting technology. The adsorption behavior of the 2-AMP resin for Ag(I) recovery was assessed by batch and column experiments. The adsorption isotherm was best represented by Langmuir isotherm, and the adsorption capacity of the 2-AMP resin was 110.5 mg/g. The adsorption kinetics was found to follow the pseudo-second-order kinetic model. Moreover, the adsorbent presented good selectivity for Ag(I) from the coexisting ions [Ca(II), Mg(II), Ni(II), and Zn(II)] both in the batch and column experiments. The adsorption efficiency was unchanged even when the NaNO3 concentration was about 3000 fold higher than Ag(I). The interactions between the 2-AMP resin and Ag(I) were interpreted through XPS analysis, and the adsorption mechanism was proved to be a chelation interaction between aminomethyl-pyridine groups and Ag(I). It is demonstrated that the 2-AMP resin would have a splendid potential for the recovery of Ag(I).

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A novel nanobiosorbent of functionalized graphene quantum dots from rice husk with barium hydroxide for microwave enhanced removal of lead (II) and lanthanum (III)

Cited by 80 publications

References 45 publications

Removal of lead ions (Pb2+) from water and wastewater: a review on the low-cost adsorbents

Removal of lead ions (Pb2+) from water and wastewater: a review on the low-cost adsorbents

Development of Graphene Quantum Dots by Valorizing the Bioresources – A Critical Review

Selective Recovery of Ag(I) Using a Cellulose-Based Adsorbent in High Saline Solution

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