Journal ArticleDOI
Preparation and characterization of activated carbons from waste tea by H3PO4 activation in different atmospheres for oxytetracycline removal
TLDR
In this article, the optimum atmosphere condition for preparing waste tea-based activated carbon by H 3 PO 4 activation, activated carbons were prepared under nitrogen (NAC), air (AAC) and steam (SAC) atmospheres, respectively.Abstract:
In order to study the optimum atmosphere condition for preparing waste tea-based activated carbon by H 3 PO 4 activation, activated carbons were prepared under nitrogen (NAC), air (AAC) and steam (SAC) atmospheres, respectively. The physicochemical properties of the three activated carbons were characterized by N 2 adsorption/desorption and Fourier transform infrared spectroscopy (FTIR). AAC exhibited highest values of the Brunauer–Emmett–Teller (BET) surface area (880 m 2 /g) and total pore volume (0.680 cm 3 /g) than that of NAC (824 cm 2 /g and 0.666 cm 3 /g) and SAC (785 cm 2 /g and 0.629 cm 3 /g). Nevertheless, the adsorption results for oxytetracycline (OTC) showed that SAC had the strongest adsorption capacity than NAC and AAC. The adsorption equilibrium data for OTC adsorption onto the three activated carbons agreed well with the Freundlich model, and the adsorption kinetics were well fitted in pseudo-second-order model. Results revealed that activated carbon prepared under air atmosphere showed the largest BET surface area and activated carbon prepared under steam atmosphere showed the best adsorption capacity.read more
Citations
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Recent advances in applications of activated carbon from biowaste for wastewater treatment: a short review.
TL;DR: In this article, the authors summarized recent development and findings on application of activated carbon synthesized from biowaste in wastewater treatment and tabulated the adsorption efficiencies of newly developed activated carbons in treatment of different pollutants (including dyes, metal ions, pharmaceutical and personal care products, organic pollutants).
Journal ArticleDOI
Synthesis and application of Granular activated carbon from biomass waste materials for water treatment: A review
TL;DR: A comprehensive review on recent advances in production of biomass waste-based granular activated carbon (GAC) for water treatment and highlights future research directions is provided in this paper, where the effect of preparation pathways on the adsorptive properties of biomass derived GAC is explored.
Journal ArticleDOI
Removal of acetaminophen by activated carbon synthesized from spent tea leaves: equilibrium, kinetics and thermodynamics studies
Syieluing Wong,Yuhan Lim,Norzita Ngadi,Ramli Mat,Onn Hassan,Ibrahim Mohammed Inuwa,Nurul Balqis Mohamed,Jiun Hor Low +7 more
TL;DR: In this paper, the authors reported conversion of spent tea leaves (STL) to activated carbon (AC) for removal of acetaminophen (paracetamol) from simulated wastewater.
Journal ArticleDOI
Preparation and characterisation of activated carbon from waste tea by physical activation using steam.
TL;DR: Overall, waste tea was found to be an attractive raw material for producing low-cost activated carbon and offers a potential solution to the problems of waste tea disposal and low- cost activated carbon production.
Journal ArticleDOI
Optimized removal of oxytetracycline and cadmium from contaminated waters using chemically-activated and pyrolyzed biochars from forest and wood-processing residues.
TL;DR: Under optimized operating conditions, and based on equilibrium modelling data, the biochars which showed the highest removal efficiencies of OTC and cadmium were "5M H3PO4 forest" and "1M NaOH forest", respectively, which are highly competitive.
References
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Journal ArticleDOI
Synthesis and exfoliation of isocyanate-treated graphene oxide nanoplatelets
TL;DR: In this article, a number of functionalized graphite oxides were prepared by treatment of graphite oxide (GO) with organic isocyanates, which can then be exfoliated into functionalized graphene oxide nanoplatelets that can form a stable dispersion in polar aprotic solvents.
Journal ArticleDOI
Surface oxides on carbon and their analysis: a critical assessment
TL;DR: The methods for the determination of various types of oxygen surface functions on carbon materials are briefly described, and their relative advantages and problems that may arise are discussed in this paper, where acidimetric titration techniques, IR spectroscopy, XPS, thermal desorption spectroscopic, and electrokinetic measurements are described.
Journal ArticleDOI
Tea waste as a low cost adsorbent for the removal of Cu and Pb from wastewater
TL;DR: In this article, the adsorption of copper and lead ions onto tea waste from aqueous solutions was studied to enable comparison with alternative commonly available absorbents, and the equilibrium data were satisfactorily fitted to Langmuir and Freundlich isotherms.
Journal ArticleDOI
Activated carbons from yellow poplar and white oak by H3PO4 activation
Marit Jagtoyen,Frank Derbyshire +1 more
TL;DR: In this article, a discussion is presented on the possible mechanisms of phosphoric acid activation, drawing upon extensive research on the use of phosphorous compounds as fire retardants for wood and cellulose, and it is considered that activation of amorphous polymers produces mostly micropores, while activation of crystalline cellulose produces a mixture of pore sizes.
Journal ArticleDOI
Isotherms, kinetics and thermodynamics of acid dye adsorption on activated palm ash
TL;DR: In this article, the removal of acid green 25 (AG25) dye onto activated palm ash from aqueous solutions was investigated using Langmuir and Freundlich models.