Removal of cobalt (II) ions from aqueous solutions utilizing the pre-treated 2-Hypnea Valentiae algae: Equilibrium, thermodynamic, and dynamic studies

Vafajoo, Leila; Cheraghi, Reza; Dabbagh, Reza; McKay, Gordon

doi:10.1016/j.cej.2017.08.019

Cited by 91 publications

(43 citation statements)

References 37 publications

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“…Moreover, it is clear that the adsorption capacity decreases at pH values higher than 5.5; this phenomenon can be explained by the formation of stable Ni(II) and Co(II) complexes. Similar findings were also reported by other researchers [41,42].…”

Section: Effect Of Initial Solution Phsupporting

confidence: 93%

Polyvinyl Alcohol/Alginate/Zeolite Nanohybrid for Removal of Metals

et al. 2020

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A novel polyvinyl alcohol/alginate/zeolite nanohybrid adsorbent for the adsorption of Ni(II) and Co(II) metal ions was prepared by the casting method. The prepared adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy as well as Barrett-Joyner-Halenda and Brunauer-Emmett-Teller analyses. The optimum adsorption conditions in terms of content of zeolite nanoparticles, adsorbent dosage, and initial pH were determined. The kinetic data for both ions were well described by the double-exponential kinetic model. The obtained Langmuir maximum adsorption capacities of Ni(II) and Co(II) metal ions were 81.51 and 79.58 mg g -1 , respectively. The adsorption/ desorption experiments showed a good performance after 5 cycles of adsorption.

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Section: Effect Of Initial Solution Phsupporting

confidence: 93%

Polyvinyl Alcohol/Alginate/Zeolite Nanohybrid for Removal of Metals

et al. 2020

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“…The potential for the regeneration of the lead loaded adsorbents has also attracted much attention and several studies have investigated the reusability of the sorbents after regeneration. These include: CoFe 2 O 4 -G, NiFe 2 O 4 -G, Fe 3 O 4 -GS, EDTA-mGO, EDTA-MCS/GO, DTPA/MGO, GOMCS-IL, and IT-PRGO, Mg−Al LDH / pRGO [67][68][69][70][71][72][73][74][75]. Most of these nanocomposites were reusable with Fe 3 O 4 -GS and EDTA-mGO maintained more than 80% of their original adsorption capacity [76,77].…”

Section: Lead Removalmentioning

confidence: 99%

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

2020

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The presence of traces of heavy metals in wastewater causes adverse health effects on humans and the ecosystem. Adsorption is a low cost and eco-friendly method for the removal of low concentrations of heavy metals from wastewater streams. Over the past several years, graphene-based materials have been researched as exceptional adsorbents. In this review, the applications of graphene oxide (GO), reduce graphene oxide (rGO), and graphene-based nanocomposites (GNCs) for the removal of various metals are analyzed. Firstly, the common synthesis routes for GO, rGO, and GNCs are discussed. Secondly, the available literature on the adsorption of heavy metals including arsenic, lead, cadmium, nickel, mercury, chromium and copper using graphene-based materials are reviewed and analyzed. The adsorption isotherms, kinetics, capacity, and removal efficiency for each metal on different graphene materials, as well as the effects of the synthesis method and the adsorption process conditions on the recyclability of the graphene materials, are discussed. Finally, future perspectives and trends in the field are also highlighted.

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“…Macroalga biomass can potentially stabilise heavy metals due to their small uniform particle size and presence of different metal binding sites on their cell walls [26][27][28][29][30]. Red macroalgae (Gracilaria changii) are abundant in the coastal areas of Oceania, Africa, and Asia [31].…”

Section: Element Industriesmentioning

confidence: 99%

“…The criteria for selection of the ideal biosorbent should include its availability, non-toxicity, cost, metal-binding capacity, and regeneration [24]. Biosorbents that require minimal processing or are abundant in nature are considered low-cost materials [25].Macroalga biomass can potentially stabilise heavy metals due to their small uniform particle size and presence of different metal binding sites on their cell walls [26][27][28][29][30]. Red macroalgae (Gracilaria changii) are abundant in the coastal areas of Oceania, Africa, and Asia [31].…”

mentioning

confidence: 99%

Optimisation and Modelling of Pb(II) and Cu(II) Biosorption onto Red Algae (Gracilaria changii) by Using Response Surface Methodology

Isam

Baloo

Kutty

et al. 2019

Water

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The removal of Pb (II) and Cu (II) ions by using marine red macroalgae (Gracilaria changii) as a biosorbent material was evaluated through the batch equilibrium technique. The effect of solution pH on the removal of metal ions was investigated within the range of 2–7. The response surface methodology (RSM) technique involving central composite design (CCD) was utilised to optimise the three main sorption parameters, namely initial metal ion concentration, contact time, and biosorbent dosage, to achieve maximum ion removal. The models’ adequacy of response was verified by ANOVA. The optimum conditions for removal of Pb (II) and Cu (II) were as follows: pH values of 4.5 and 5, initial concentrations of 40 mg/L, contact times of 115 and 45 min, and biosorbent dosage of 1 g/L, at which the maximum removal percentages were 96.3% and 44.77%, respectively. The results of the adsorption isotherm study showed that the data fitted well with the Langmuir’s model for Pb (II) and Cu (II). The results of the adsorption kinetic study showed that the data fitted well with the pseudo-second order model for Pb (II) and Cu (II). In conclusion, red alga biomass exhibits great potential as an efficient low-cost sorbent for removal of metal ions.

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Removal of cobalt (II) ions from aqueous solutions utilizing the pre-treated 2-Hypnea Valentiae algae: Equilibrium, thermodynamic, and dynamic studies

Cited by 91 publications

References 37 publications

Polyvinyl Alcohol/Alginate/Zeolite Nanohybrid for Removal of Metals

Polyvinyl Alcohol/Alginate/Zeolite Nanohybrid for Removal of Metals

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

Optimisation and Modelling of Pb(II) and Cu(II) Biosorption onto Red Algae (Gracilaria changii) by Using Response Surface Methodology

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