Synthesis of activated carbon from spent tea leaves for aspirin removal

Wong, Syieluing; Lee, Yowjeng; Inuwa, Ibrahim Mohammed; Mohamed, Nurul Balqis

doi:10.1016/j.cjche.2017.11.004

Cited by 72 publications

(17 citation statements)

References 53 publications

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“…The pH PZC of RBC and CTBC samples was found at 7.38 and 7.04 respectively ( figure 5), which is similar to other clays, such as Na-smectite (pH PZC =6.39) and Ca-smectite (pH PZC =6.24) [31]. When pH of solution > pH PZC , the clay react as negative surface and as a positive surface when solution pH<pH PZC [38]. In this study, the sorption experiments were performed at pH=5.0 implying that the surface of CTBC was positively charged and the ion exchange mechanism can occurred [20].…”

Section: Resultssupporting

confidence: 51%

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Ouakouak

Rihani

Youcef

et al. 2020

Mater. Res. Express

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Calcium treated bentonite clay (CTBC) was prepared by CaCl 2 impregnation of Algerian bentonite clay. The prepared adsorbent was characterized and successfully used to remove Cu (II) ions from aqueous solutions at different conditions (pH, stirring time and initial copper concentration). Results showed that the raw bentonite was changed completely into Ca-bentonite, which exhibits a high adsorption capacity (qt=19.98 mg g −1 ) at pH=5.0. It appeared that the sorption mechanisms are simultaneous and strongly depend on pH value. In the pH range from 3-10, the removal of copper occurs mainly by ion exchange, surface metal complexation and precipitation of Cu (OH) 2 . It was also found that the experimental data of kinetic adsorption are well fitted by the pseudo-first order model. Equilibrium data obeyed the Langmuir isotherm with maximum adsorption capacity of 55.48 mg g −1 .The mean adsorption energy predicted by Dubinin-Radushkevich model (E=1.55 Kj/mol) shows the physical nature of the adsorption interactions. Results of this study suggest the potential of the prepared CTBC which can be used easily for fast decontamination of wastewater containing toxic metal ions.

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Section: Resultssupporting

confidence: 51%

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Ouakouak

Rihani

Youcef

et al. 2020

Mater. Res. Express

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“…The low capacity adsorption of MB onto the BEBD sorbent is due to the inexistent electrostatic forces between MB dye and BEBD surface at pH < pHPCZ. In fact, at this pH, both MB dye and sorbent surface are positively charged [25]. However, EBT is an anionic dye, so it has a negative charge [26].…”

Section: ) Effect Of Ph Solution and Phpzc On Ebt And Mb Removalmentioning

confidence: 94%

Biochar from Empty Date Fruit Bunch as an Adsorbent to Remove Eriochrome Black T and Methylene Blue from Aqueous Solution

Bella

Bendaikha

2022

App. Envi. Res.

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Date fruit has a significant role in Sahara countries' economies. In this study, a bunch of empty dates waste was used to produce biochar, which will be used to adsorb Eriochrome black T (EBT) and methylene blue (MB) dyes from aqueous solution. The dates bunch was washed, dried, and ground into small particles. Then it was heated in a muffle furnace at 850 °C. The biochar from empty date bunches (BEDB) characteristics before and after adsorption was determined by using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The experiment has used different parameters notably initial concentration (25 – 100 mg L-1), contact time (0 – 90 min), BEDB amount (0.01 – 0.05 g), and different solutions pH (2 – 10) in batch adsorption. This investigation has shown that Langmuir and pseudo-second-order isotherm models were well-fitted than Freundlich and pseudo-first-order. The maximum capacity of adsorption was 58.47 and 80.64 mg g-1 for EBT and MB removal, respectively at 25°C. The results obtained show that BEDB sorbent has an important adsorption capacity of dyes removal and has a performance to eliminate EBT and MB dyes from aqueous solution.

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“…The Freundlich isotherms are expressed based on Equation :

Log q_{e} = Log K_{F} + \frac{1}{n} Log C_{e}

where, q e is the adsorbent concentration at equilibrium (mg g −1 ), K F (mg g −1 ) (L mg −1 ) 1/ n and n are the Freundlich constants, and C e is the equilibrium concentration of adsorbent (mg L −1 ). [ 3 ]…”

Section: Resultsmentioning

confidence: 99%

“…Recently, water pollution has been a warning environmental problem due to pharmaceuticals [ 1 ] and personal care product residuals, [ 1,2 ] which are produced by homemade and hospital sewage, usage of over‐the‐counter drugs, and agricultural and industrial wastes, [ 3 ] These products are not biodegradable and are not easily degraded in the treatment process. [ 4 ] Among various pharmaceuticals pollutants, acetylsalicylic acid, also known as aspirin, is one of the non‐steroidal and anti‐inflammatory drugs widely used by humans and animals.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of chitosan and amine functionalized MCM‐41 nanocomposite for the removal of acetylsalicylic acid from water using central composite design

Moradpour

Sedaghat

Azar

et al. 2021

Applied Organom Chemis

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In this study, the synthesis of the mesoporous mobile composite material No. 41 (MCM-41) modified with 3-aminopropyltriethoxysilane (APS) and chitosan (Cs) was carried out successfully to form novel Cs/MCM-41-APS nanocomposite (NC). It was also reported that its application as an adsorbent has removed aspirin from water. The structure and morphology of NC was Recently, water pollution has been a warning environmental problem due to pharmaceuticals [1] and personal care product residuals, [1,2] which are produced by homemade and hospital sewage, usage of over-the-counter drugs, and agricultural and industrial wastes, [3] These products are not biodegradable and are not easily degraded in the treatment process. [4] Among various pharmaceuticals pollutants, acetylsalicylic acid, also known as aspirin, is one of the non-steroidal and antiinflammatory drugs widely used by humans and

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Synthesis of activated carbon from spent tea leaves for aspirin removal

Cited by 72 publications

References 53 publications

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Biochar from Empty Date Fruit Bunch as an Adsorbent to Remove Eriochrome Black T and Methylene Blue from Aqueous Solution

Synthesis of chitosan and amine functionalized MCM‐41 nanocomposite for the removal of acetylsalicylic acid from water using central composite design

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Synthesis of activated carbon from spent tea leaves for aspirin removal

Cited by 72 publications

References 53 publications

Adsorption characteristics of Cu (II) onto CaCl2 pretreated algerian bentonite

Adsorption characteristics of Cu (II) onto CaCl2 pretreated algerian bentonite

Biochar from Empty Date Fruit Bunch as an Adsorbent to Remove Eriochrome Black T and Methylene Blue from Aqueous Solution

Synthesis of chitosan and amine functionalized MCM‐41 nanocomposite for the removal of acetylsalicylic acid from water using central composite design

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Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite

Adsorption characteristics of Cu (II) onto CaCl₂ pretreated algerian bentonite