Lead (Pb 2+ ) and copper (Cu 2+ ) remediation from water using superparamagnetic maghemite (γ-Fe 2 O 3 ) nanoparticles synthesized by Flame Spray Pyrolysis (FSP)

Rajput, Shalini; Singh, Latika; Pittman, Charles U.; Mohan, Dinesh

doi:10.1016/j.jcis.2016.11.095

Cited by 138 publications

(34 citation statements)

References 80 publications

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“…The peak positions are well in agreement with the standard maghemite structure. 28 However, one of the most powerful techniques for providing a clear assignment of the phase of the iron oxide or oxyhydroxide is Raman spectroscopy where all the different iron oxide phases reveal strong and distinct characteristic Raman active features. 29 Raman spectroscopy can also detect crystalline NPs smaller than 4 nm and amorphous phases, which cannot be detected by XRD.…”

Section: Resultsmentioning

confidence: 99%

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Davodi

Mühlhausen

Tavakkoli

et al. 2018

ACS Appl. Mater. Interfaces

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Earth-abundant element-based inorganic–organic hybrid materials are attractive alternatives for electrocatalyzing energy conversion reactions. Such material structures do not only increase the surface area and stability of metal nanoparticles (NPs) but also modify the electrocatalytic performance. Here, we introduce, for the first time, multiwall carbon nanotubes (MWNTs) functionalized with nitrogen-rich emeraldine salt (ES) (denoted as ES-MWNT) as a promising catalyst support to boost the electrocatalytic activity of magnetic maghemite (γ-Fe2O3) NPs. The latter component has been synthesized by a simple and upscalable one-step pulsed laser ablation method on Ni core forming the core–shell Ni@γ-Fe2O3 NPs. The catalyst (Ni@γ-Fe2O3/ES-MWNT) is formed via self-assembly as strong interaction between ES-MWNT and Ni@γ-Fe2O3 results in NPs’ encapsulation in a thin C–N shell. We further show that Ni does not directly function as an active site in the electrocatalyst but it has a crucial role in synthesizing the maghemite shell. The strong interaction between the NPs and the support improves notably the NPs’ catalytic activity toward oxygen evolution reaction (OER) in terms of both onset potential and current density, ranking it among the most active catalysts reported so far. Furthermore, this material shows a superior durability to most of the current excellent OER electrocatalysts as the activity, and the structure, remains almost intact after 5000 OER stability cycles. On further characterization, the same trend has been observed for hydrogen evolution reaction, the other half-reaction of water splitting.

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Section: Resultsmentioning

confidence: 99%

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Davodi

Mühlhausen

Tavakkoli

et al. 2018

ACS Appl. Mater. Interfaces

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“…S1, Supporting material, the adsorption capacity for Pb 2+ increased with the initial concentration from 0.1 to 30 mmol L −1 , and then remained stable as concentration was increased further. Thus, the maximum adsorption capacity of Alg‐Chi for Pb 2+ was calculated as 468.5 mg g −1 , which is higher than that of most reported sorbents for Pb 2+ (Table ) …”

Section: Resultsmentioning

confidence: 66%

“…Thus, the maximum adsorption capacity of Alg-Chi for Pb 2+ was calculated as 468.5 mg g −1 , which is higher than that of most reported sorbents for Pb 2+ (Table 4). [4][5][6][7][8][9][10][11][12][13]15,[20][21][22][23][24][25][26][27] In order to determine the Alg-Chi adsorption capacity for Pb 2+ at its drinking water maximum contaminant limit (MCL: 20 μg L −1 ), we further recorded the adsorption data of Pb 2+ residual concentration between 0 and 220 μg L −1 . Meanwhile, Langmuir [Q e = Q m K L C e /(1 + K L C e )] and Freundlich [Q e = K F C e 1/n ] models wileyonlinelibrary.com/jctb were fitted to these experimental data as shown in Fig.…”

Section: Maximum Adsorption Capacity For Pb 2+mentioning

confidence: 99%

“…[5][6][7] Sodium alginate, produced by brown algae that are abundant in nature, is widely used as a thickener in the food industry and as an antidote for heavy metal poisoning in the field of medicine. Recent studies have shown that immobilizing alginate onto silica, 8 polyaniline nanofibers, 9 SBA-15, 10 and maghemite 11 can efficiently remove Pb 2+ and Cu 2+ in wastewater. Chitosan, a deacetylated product of chitin, is usually used as a food additive and fruit juice clarifier.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient removal of toxic Pb²⁺ from wastewater by an alginate–chitosan hybrid adsorbent

Wang

Jin

Wang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND In this study, a low‐cost and environment‐friendly alginate–chitosan hybrid adsorbent (depicted as Alg‐Chi) was developed for the removal of Pb2+ from water. RESULTS Experimental results showed that the Alg‐Chi exhibits high selectivity and affinity for Pb2+. The selectivity coefficients of the Alg‐Chi for Pb2+/Cr3+, Pb2+/Co2+ Pb2+/Cd2+, Pb2+/Zn2+, and Pb2+/Cu2+ are all >5. It can uptake 96.8% of Pb2+ from Pb2+‐containing solutions (1.5 mmol L−1), and the maximum adsorption capacity for Pb2+ reaches 468.5 mg g−1, which is higher than that of most reported adsorbents for Pb2+. Moreover, the Alg‐Chi can also be regenerated via simple acid elution and used repeatedly without loss in adsorption ability. CONCLUSIONS Analysis of the adsorption mechanism indicated that the Alg‐Chi adsorbed Pb2+ mainly through ion exchange and chemical coordination. Green and low‐cost raw materials, simple preparation process, efficient removal efficiency and recyclable, these characteristics give the synthetic Alg‐Chi broad application prospects in the field of Pb2+‐containing wastewater treatment. © 2018 Society of Chemical Industry

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“…Lead, which has been in use since the ancient times, is the second among the priority list of hazardous substances ( Ashraf et al, 2017 ). This toxic metal is being continually introduced into the environment through discharge from various manufacturing industries like storage batteries, printing, painting, pigments, dying and leaded glass ( Kaplan Ince et al, 2017 ; Shalini et al, 2017 ). Unlike organic pollutants, it is not at all degradable and contaminates the soils, the water body and agricultural products.…”

Section: Introductionmentioning

confidence: 99%

Quantification of lead in cooking utensils and vegetables using square wave anodic stripping voltammetry

Tesfaw

Mehretie

Admassie

2018

Heliyon

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A simple and sensitive voltammetric method using in-situ bismuth film modified glassy carbon electrode (BiFGE) and Nafion-coated bismuth film modified glassy carbon electrode (NC-BiFGE) were used to determine the amount of lead(II) present in locally produced (at Kombolcha, 376 km North of Addis Ababa, Ethiopia) and imported cooking utensils and vegetable samples before and after cooking with the utensils. The voltammetric method was validated using standard spectroscopic method and recovery tests. The amount of lead(II) found in the locally produced utensil (6.48 mg L−1) was very high compared to the imported utensil (0.007 mg L−1). Moreover, a 3–5 fold increase in the amount of lead(II) was found when different vegetables were cooked with the local utensil as a result of the leaching out of the lead(II) from the cooking utensil.

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Lead (Pb 2+ ) and copper (Cu 2+ ) remediation from water using superparamagnetic maghemite (γ-Fe 2 O 3 ) nanoparticles synthesized by Flame Spray Pyrolysis (FSP)

Cited by 138 publications

References 80 publications

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Highly efficient removal of toxic Pb²⁺ from wastewater by an alginate–chitosan hybrid adsorbent

Quantification of lead in cooking utensils and vegetables using square wave anodic stripping voltammetry

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Lead (Pb 2+ ) and copper (Cu 2+ ) remediation from water using superparamagnetic maghemite (γ-Fe 2 O 3 ) nanoparticles synthesized by Flame Spray Pyrolysis (FSP)

Cited by 138 publications

References 80 publications

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: toward Design of Advanced Electrocatalyst for Full Water Splitting

Highly efficient removal of toxic Pb2+ from wastewater by an alginate–chitosan hybrid adsorbent

Quantification of lead in cooking utensils and vegetables using square wave anodic stripping voltammetry

Contact Info

Product

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Highly efficient removal of toxic Pb²⁺ from wastewater by an alginate–chitosan hybrid adsorbent