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Activated carbon from tamarind seed and jackfruit seed prepared via microwave irradiated for dye removal

Activated carbon from tamarind seed and jackfruit seed prepared via microwave irradiated for dye removal / Mohamad Nasran Nasehir Khan
Sumber air seperti sungai, tasik, air bumi dan laut yang berhampiran dengan kawasan industri tekstil lebih mudah mengalami pencemaran air akibat buangan terus air sisa tekstil ke persekitaran. Bahan penjerap seperti karbon teraktif berasaskan sisa pertanian didapati berpotensi untuk digunakan bagi tujuan rawatan air sisa ini. Dalam kajian ini, karbon teraktif daripada biji asam jawa (KTBAJ) serta biji nangka (KTBN) disediakan melalui pengaktifan fizikima secara pemanasan gelombang mikro. Kaedah ini merangkumi impregnasi kalium hidroksida, gasifikasi karbon dioksida dan penyinaran gelombang mikro. Kajian penjerapan dijalankan untuk mengenal pasti prestasi KTBAJ dan KTBN dalam penyingkiran pencelup metilena biru serta remazol biru terang R. Rekabentuk komposit pusat digunakan untuk mengenal pasti keadaan penyediaan optimum bagi masa penyinaran, kekuatan penyinaran serta nisbah impregnasi untuk biji asam jawa serta biji nangka. Keadaan optimum bagi penyediaan KTBAJ adalah 440 W, 2.0 minit dan nisbah impregnasi 0.50 manakala KTBN adalah 440 W, 2.0 minit and nisbah impregnasi 0.60 yang memberikan keputusan penyingkiran metilena biru sebanyak masing-masing 70.4% dan 83.2%; penyingkiran remazol biru terang R iaitu masing-masing 62.7% dan 75.6% serta hasil masing-masing sebanyak 21.8% dan 22.5 %. Karbon teraktif biji asam jawa dan biji nangka mempunyai luas permukaan yang tinggi (>869 m2/g), isipadu liang (> 0.40 cm3/g) dan kandungan karbon tetap (>76%). Kedua-dua bahan ini mengandungi liang pori yang bersifat tidak seragam dalam julat meso liang. Kesan kepekatan awal pencelup (25-300 mg/L), masa tindakbalas (0-24 jam) dan suhu larutan (30-60oC) juga turut dikenal pasti. Kadar penjerapan meningkat apabila kepekatan awal serta masa tindakbalas meningkat. Untuk kedua-dua pencelup bagi KTBAJ serta KTBN sesuai digandingkan dalam model Freundlich untuk menepati hubungan penjerapan keseimbangan. Model pseudo-tertib-pertama sesuai mewakili data kinetik bagi kedua-dua bahan penyerap tersebut. _______________________________________________________________________________________________________ Water sources such as rivers, lakes, groundwater and seas that located nearby to textile industries can be easily polluted if direct discharge of dye wastewater to the environment is occurred. Adsorbent such as activated carbon particularly produced from agrowaste has been found to be suitable for this purpose. In this study, tamarind seed based activated carbon (TASAC) and jackfruit seed based activated carbon (JASAC) were prepared by using physiochemical activation. It consisted of potassium hydroxide (KOH) impregnation, CO2 gasification and microwave irradiation. A study of batch adsorption for methylene blue (MB) and remazol brilliant blue R (RBBR) were carried out to determine the performance of TASAC and JASAC. Central composite design (CCD) was used to evaluate the optimum preparation conditions of radiation time, radiation power and impregnation ratio (IR) for TASAC and JASAC. The optimum conditions for TASAC were 440 W, 2.0 min and IR 0.5 while for JASAC was 440 W, 2.0 min and IR 0.6, which resulted MB removal of 70.4% and 83.2%, respectively; RBBR removal of 62.7% and 75.6%, respectively and yield of 21.8% and 22.5%, respectively. TASAC and JASAC have high surface area (>869 m2/g), pore volume (> 0.40 cm3/g) and fixed carbon content (>76%). The TASAC and JASAC have heterogeneous type pore size in mesoporous region. The effect of initial dye concentrations (25-300 mg/L), contact times (0-24 hours) and solution temperatures (30-60oC) were determined. The MB and RBBR adsorption by TASAC and JASAC were increased as the initial dye concentration and contact time increased. The adsorption equilibrium data for both dyes onto TASAC and JASAC were best fitted by Freundlich model. Meanwhile, the kinetic data was best represented by the pseudo firstorder kinetic model.
Contributor(s):
Mohamad Nasran Nasehir Khan - Author
Primary Item Type:
Thesis
Identifiers:
Accession Number : 875008069
Language:
English
Subject Keywords:
Water; textile; dye
First presented to the public:
9/1/2018
Original Publication Date:
6/17/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 162
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-06-19 16:50:22.782
Submitter:
Mohd Jasnizam Mohd Salleh

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Activated carbon from tamarind seed and jackfruit seed prepared via microwave irradiated for dye removal1 2019-06-19 16:50:22.782