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Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri

In this study, the waste coffee grounds-derived activated carbon (CSG-AC) used was prepared via zinc chloride (ZnCl2) activation. CSG-AC is used as an adsorbent to remove methylene blue (MB) from the aqueous solutions. The effects of adsorbent dosage, initial concentration, contact time, solution pH...

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Main Author: Mohd Yusri, Muhammad Adam Danial
Format: Student Project
Language:English
Published: 2024
Subjects:
Flocculation, precipitation, adsorption, etc. Coagulation
Online Access:https://ir.uitm.edu.my/id/eprint/111210/1/111210.pdf
https://ir.uitm.edu.my/id/eprint/111210/
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spelling my.uitm.ir.1112102025-03-07T08:42:42Z https://ir.uitm.edu.my/id/eprint/111210/ Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri Mohd Yusri, Muhammad Adam Danial Flocculation, precipitation, adsorption, etc. Coagulation In this study, the waste coffee grounds-derived activated carbon (CSG-AC) used was prepared via zinc chloride (ZnCl2) activation. CSG-AC is used as an adsorbent to remove methylene blue (MB) from the aqueous solutions. The effects of adsorbent dosage, initial concentration, contact time, solution pH, and temperature were studied in batch experiments. The experimental data were analysed by the Langmuir, Freundlich, and Temkin adsorption isotherm models. Based on correlation coefficient results (0.9998), the Langmuir isotherm model provided the best fit for the adsorption of MB onto CSG-AC. The maximum monolayer adsorption of MB onto CSG-AC was calculated to be 176 mg/g. Kinetic parameters were evaluated based on pseudo-first-order (PFO), pseudo-second-order (PSO) and Weber-Morris intraparticle diffusion (IPD) kinetic models. The regression results showed that a PSO model is more accurately representing the adsorption kinetics. The plot of qt versus t1/2 for the IPD model represented multi-linearity and proved that the adsorption processes occurred in more than one step. Thermodynamic parameters were determined between temperatures of 25 to 34 °C. The ΔG° values were negative while the ΔH° values were positive and the overall adsorption process was determined as spontaneous and endothermic. While the positive value of ΔS° proposed good affinity of the MB molecules toward the CSG-AC. The results from this study suggested that CSG-AC could be a viable adsorbent in managing higher concentrations of dyes from water and wastewater. 2024-08 Student Project NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/111210/1/111210.pdf Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri. (2024) [Student Project] (Submitted)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Flocculation, precipitation, adsorption, etc. Coagulation
spellingShingle Flocculation, precipitation, adsorption, etc. Coagulation
Mohd Yusri, Muhammad Adam Danial
Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
description In this study, the waste coffee grounds-derived activated carbon (CSG-AC) used was prepared via zinc chloride (ZnCl2) activation. CSG-AC is used as an adsorbent to remove methylene blue (MB) from the aqueous solutions. The effects of adsorbent dosage, initial concentration, contact time, solution pH, and temperature were studied in batch experiments. The experimental data were analysed by the Langmuir, Freundlich, and Temkin adsorption isotherm models. Based on correlation coefficient results (0.9998), the Langmuir isotherm model provided the best fit for the adsorption of MB onto CSG-AC. The maximum monolayer adsorption of MB onto CSG-AC was calculated to be 176 mg/g. Kinetic parameters were evaluated based on pseudo-first-order (PFO), pseudo-second-order (PSO) and Weber-Morris intraparticle diffusion (IPD) kinetic models. The regression results showed that a PSO model is more accurately representing the adsorption kinetics. The plot of qt versus t1/2 for the IPD model represented multi-linearity and proved that the adsorption processes occurred in more than one step. Thermodynamic parameters were determined between temperatures of 25 to 34 °C. The ΔG° values were negative while the ΔH° values were positive and the overall adsorption process was determined as spontaneous and endothermic. While the positive value of ΔS° proposed good affinity of the MB molecules toward the CSG-AC. The results from this study suggested that CSG-AC could be a viable adsorbent in managing higher concentrations of dyes from water and wastewater.
format Student Project
author Mohd Yusri, Muhammad Adam Danial
author_facet Mohd Yusri, Muhammad Adam Danial
author_sort Mohd Yusri, Muhammad Adam Danial
title Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
title_short Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
title_full Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
title_fullStr Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
title_full_unstemmed Adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / Muhammad Adam Danial Mohd Yusri
title_sort adsorptive removal of methylene blue by using activated carbon derived from waste coffee grounds / muhammad adam danial mohd yusri
publishDate 2024
url https://ir.uitm.edu.my/id/eprint/111210/1/111210.pdf
https://ir.uitm.edu.my/id/eprint/111210/
_version_ 1826074705385226240
score 13.244413

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