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Synthesis of microwave assisted mangoes peel based activated carbon for methylene blue dye removal equilibrium, kinetic and mechanism studies

Synthesis of microwave assisted mangoes peel based activated carbon for methylene blue dye removal equilibrium, kinetic and mechanism studies / Nurul Abiha Mohd Alwi
Terdapat banyak industri menggunakan pewarna dalam mewarnakan produk. Walaubagaimanapun bahan tersebut dikenal pasti sebagai bahan yang bertoksik dan berkasinorgenik, serta boleh menjadi sebagai salah satu bahan pencemar kepada sumber air. Pada masa kini, kajian tentang penghasilan bahan penjerap pewarna seperti karbon teraktif (KT) daripada sisa pertanian sedang giat dijalankan. Dalam kajian ini, kulit mangga (KM) telah dijadikan prekursor untuk menyingkirkan pewarna metilena biru (MB) menggunakan kaedah pengaktifan fizikal yang melibatkan penggasan karbon dioksida (CO2) dan radiasi gelombang mikro. Keadaan penyediaan KTKM optimum diperolehi pada 400 W kuasa dalam jangka masa 2.17 minit masa pengaktifan, telah menghasilkan 84.72% penyingkiran pewarna MB. Luas permukaan Bruneaur-Emmet-Teller (BET), liang meso dan kandungan karbon tetap KTKM adalah masing-masing pada 282.44 m2/g, 175.60 m2/g dan 70.68%. Liang diameter bagi KTKM adalah didapati mengikut jenis liang meso pada 2.54 nm. Keseimbangan penjerapan MB oleh KTKM adalah mengikut garis sesuhu Langmuir dengan kapasiti penjerapan selapis 196.08 mg/g. Pseudo tertib kedua didapati sepadan untuk data kinetik. Langkah mengehadkan kadar untuk penjerapan KTKM adalah penyebaran antara zarah. _______________________________________________________________________________________________________ There many industries that uses dye to be one their substance in generating their desired product. Those substances identified as toxic and carcinogenic making it one of the pollutants to water bodies. The aim of this research is to study the performance of mangoes peel based activated carbon (MPAC) to remove methylene blue (MB) dye using physical activation, CO2 under microwave heating. Optimum preparation conditions of MPAC were observed at 440 W for 2.17 minutes of activation time, resulted in 84.72% removal of MB dyes. The Bruneaur-Emmet-Teller (BET) surface area, mesopore surface area and fixed carbon content of MPAC are 282.44 m2/g, 175.60 m2/g and 70.68% respectively. The pore diameter of MPAC was discovered to be mesopore at 2.54nm. Adsorption equilibrium of MB on MPAC followed Langmuir isotherm with monolayer adsorption capacity of 196.08 mg/g. Pseudo-second order was found fit for adsorption kinetic data. The rate limiting step for MPAC adsorption is intraparticle diffusion.
Contributor(s):
Nurul Abiha Mohd Alwi - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008120
Language:
English
Subject Keywords:
dye; pollutants; water
First presented to the public:
5/1/2019
Original Publication Date:
6/27/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 59
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-06-27 16:32:53.632
Submitter:
Mohd Jasnizam Mohd Salleh

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