Journal ArticleDOI
Efficient As(V) removal by α-FeOOH and α-FeOOH/α-MnO2 embedded PEG-6-arm functionalized multiwall carbon nanotubes
Dragoslav Budimirovic,Zlate Veličković,Veljko Djokić,Milutin M. Milosavljević,Jasmina Markovski,Steva Lević,Aleksandar D. Marinković +6 more
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TLDR
In this article, a novel 6-arm amino polyethylene glycol functionalized multiwall carbon nanotubes (PEG/MWCNT) loaded with α-FeOOH (Fe/PEG, MWCNT), and hybrid α-Mn/Peg/MW CNT nano-deposit was used for As(V) removal in a batch test, the influence of pH, contact time, initial ion concentration and temperature on adsorption efficiency was studied.Abstract:
A novel adsorbents, 6-arm amino polyethylene glycol functionalized multiwall carbon nanotubes (PEG/MWCNT) loaded with α-FeOOH (Fe/PEG/MWCNT), and hybrid α-FeOOH/α-MnO2 nano-deposit (Fe-Mn/PEG/MWCNT) were used for As(V) removal. In a batch test, the influence of pH, contact time, initial ion concentration and temperature on adsorption efficiency was studied. Time-dependent adsorption was best described by pseudo-second-order kinetic model and Weber–Morris model which predicted intra-particle diffusion as a rate-controlling step of overall process. Competitive kinetic study in the presence of interfering ions shows low detrimental effect on both capacity and kinetic of As(V) removal. Thermodynamic parameters showed that the adsorption was spontaneous and endothermic processes. Influences of the pH, iron oxide loading and interfering ions were modeled by using Visual MINTEQ software. High adsorption capacities: 49.39 and 59.78 mg g−1 were obtained for Fe/- and Fe–Mn/PEG/MWCNT, respectively, and multi-cycle reusability indicated high applicability of obtained material. Two step removal process, in a batch study, was successfully performed by using PEG/MWCNT for cations removal in the first step, and Fe or Fe–Mn/PEG/MWCNT for As(V) removal in the second.read more
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Consolidated vs new advanced treatment methods for the removal of contaminants of emerging concern from urban wastewater.
Luigi Rizzo,Sixto Malato,Demet Antakyali,Vasiliki G. Beretsou,Maja Đolić,Wolfgang Gernjak,Ester Heath,Ivana Ivančev-Tumbas,Popi Karaolia,Ana R. Ribeiro,Giuseppe Mascolo,Christa S. McArdell,Heidemarie Schaar,Adrián M.T. Silva,Despo Fatta-Kassinos +14 more
TL;DR: This work critically reviews the papers available in scientific literature on consolidated (ozonation, AC and membranes) and new advanced treatment methods (mainly AOPs) to analyse their efficiency in the removal of CECs from wastewater.
Journal ArticleDOI
Treatment technologies for emerging contaminants in wastewater treatment plants: A review
TL;DR: The treatment technologies currently engaged for ECs removal in WWTPs are reviewed for further possible upgrades of the existing designs and results indicate that the fate and distribution of ECs can be approximately estimated based on physicochemical properties like octanol-water partitioning coefficient and solid-water distribution coefficient.
Journal ArticleDOI
Iron oxide and its modified forms as an adsorbent for arsenic removal: A comprehensive recent advancement
TL;DR: Arsenic removal using various types of iron oxides has been surveyed and their sorption efficiencies have been compared in this paper, and the effect of presence of other competitive ions in water has also been discussed.
Journal ArticleDOI
MnO2 -Based Materials for Environmental Applications.
TL;DR: In this paper, the authors summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping.
Journal ArticleDOI
Removal of chromium (VI) from water by porous carbon derived from corn straw: Influencing factors, regeneration and mechanism
TL;DR: The adsorbent exhibited excellent removal performance of Cr(VI) in the co-existing ions wastewater and electroplating wastewater, and could remain high removal performance for four adsorption-desorption cycles.
References
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