Engineered tea-waste biochar for the removal of caffeine, a model compound in pharmaceuticals and personal care products (PPCPs), from aqueous media

Keerthanan, S.; Bhatnagar, Amit; Mahatantila, Kushani; Jayasinghe, Chamila; Ok, Yong Sik; Vithanage, Meththika

doi:10.1016/j.eti.2020.100847

Cited by 83 publications

(33 citation statements)

References 50 publications

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“…The voltammetric measurements of Co 2+ and Ni 2+ were performed using µAUTOLAB analyzer (Eco Chemie, The Netherlands) controlled by GPES 4.9 software in a 10 mL electrochemical cell with a lead film glassy carbon electrode (PbF/GCE) as a working electrode, Pt wire and Ag/AgCl, KCl (3 mol L −1 ) as auxiliary and reference electrodes, respectively [50] .…”

Section: Methodsmentioning

confidence: 99%

Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Shirvanimoghaddam

Czech

Tyszczuk‐Rotko

et al. 2021

Journal of Advanced Research

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Section: Methodsmentioning

confidence: 99%

Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Shirvanimoghaddam

Czech

Tyszczuk‐Rotko

et al. 2021

Journal of Advanced Research

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“…Pseudo-first order q exp (mg/g) q cal (mg/g) k 1 (min The Elovich model presented the highest R 2 values; therefore, it better describes all samples' CV and CR adsorption kinetics. The better data adjustment to the Elovich model suggests that the adsorption of CV and CR in the samples occurs by a dominant chemisorption mechanism with the adsorbents having heterogeneous surfaces [101,102].…”

Section: Sample Dye Modelmentioning

confidence: 99%

Adsorption Behavior of Crystal Violet and Congo Red Dyes on Heat-Treated Brazilian Palygorskite: Kinetic, Isothermal and Thermodynamic Studies

et al. 2021

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The effect of heat treatment on the adsorptive capacity of a Brazilian palygorskite to remove the dyes crystal violet (CV) and congo red (CR) was investigated. The natural palygorskite was calcined at different temperatures (300, 500 and 700 °C) for 4 h. Changes in the palygorskite structure were evaluated using X-ray diffraction, X-ray fluorescence, thermogravimetric and differential thermal analysis, N2 adsorption/desorption and Fourier transform infrared spectroscopy. The adsorption efficiency of CV and CR was investigated through the effect of initial concentration, contact time, temperature, pH and dosage of adsorbent. The calcination increased the adsorption capacity of palygorskite, and the greatest adsorption capacity of CV and CR dyes occurred in the sample calcined at 700 °C (Pal-700T). The natural and calcined samples at 300 and 500 °C followed the Freundlich isothermal model, while the Pal-700T followed the Langmuir isothermal model. Adsorption kinetics results were well described by the Elovich model. Pal-700T showed better adsorption performance at basic pH, with removal greater than 98%, for both dyes. Pal-700T proved to be a great candidate for removing cationic and anionic dyes present in water.

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“…is subgroup comprises adsorbents formed by the combination of materials of two or more types, such as organic and inorganic, to improve their morphological characteristics, specific surface area, and adsorption capacity [60,109]. ey fall in two categories: organic-organic composites (Table 11) and organic-inorganic composites (Table 12).…”

Section: Compositesmentioning

confidence: 99%

A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents

Quintero-Jaramillo

Carrero-Mantilla

Sanabria‐González

2021

The Scientific World Journal

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A systematic literature review of publications from 2000 to 2020 was carried out to identify research trends on adsorbent materials for the removal of caffeine from aqueous solutions. Publications were retrieved from three databases (Scopus, Web of Science, and Google Scholar). Words “adsorption AND caffeine” were examined into titles, abstracts, and keywords. A brief bibliometric analysis was performed with emphasis on the type of publication and of most cited articles. Materials for the removal of caffeine were classified according to the type of material into three main groups: organic, inorganic, and composites, each of them subdivided into different subgroups consistent with their origin or production. Tables resume for each subgroup of adsorbents the key information: specific surface area, dose, pH, maximum adsorption capacity, and isotherm models for the removal of caffeine. The highest adsorption capacities were achieved by organic adsorbents, specifically those with granular activated carbon (1961.3 mg/g) and grape stalk activated carbon (916.7 mg/g). Phenyl-phosphate-based porous organic polymer (301 mg/g), natural sandy loam sediment (221.2 mg/g), composites of MCM-48 encapsulated graphene oxide (153.8 mg/g), and organically modified clay (143.7 mg/g) showed adsorption capacities lower than those of activated carbons. In some activated carbons, a relation between the specific surface area (SSA) and the maximum adsorption capacity (Qmax) was found.

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Engineered tea-waste biochar for the removal of caffeine, a model compound in pharmaceuticals and personal care products (PPCPs), from aqueous media

Cited by 83 publications

References 50 publications

Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Adsorption Behavior of Crystal Violet and Congo Red Dyes on Heat-Treated Brazilian Palygorskite: Kinetic, Isothermal and Thermodynamic Studies

A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents

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