Penjerapan di dalam turus lapisan tetap telah dicadangkan sebagai kaedah yang berkesan untuk merawat air kumbahan daripada bidang perindustrian. Kajian ini bertujuan untuk mengkaji keberkesanan penyingkiran pewarna Metilina Biru (MB) menggunakan karbon teraktif berasaskan tempurung kelapa (CSAC) yang dihasilkan melalui radiasi gelombang aliran di dalam turus lapisan tetap. Kesan parameter penting seperti kadar aliran MB (4-10 mL/min), ketinggian lapisan CSAC (2-4 cm) dan kepekatan awal MB (20-60 ppm) di dalam turus lapisan tetap terhadap lengkung bulus dan prestasi penjerapan disiasat. Hasil uji kaji menunjukkan bahawa lengkung bulus bergantung kepada kelajuan aliran MB, ketinggian lapisan CSAC, dan kepekatan awal MB. Masa tepu dan kapasiti penjerapan direkodkan. Model Adams-Bohart, Thomas, MDR dan BDST dipilih untuk menganalisis prestasi penjerapan di dalam turus lapisan tetap. Kapasiti penjerapan, kadar pemalar, kadar penentuan bukan linear (r2) dan jumlah ralat yang dikuasakan (SSE) bagi setiap model telah dikira. Model Thomas, MDR dan BDST amat serasi dengan data penjerapan berbanding model Adam-Bohart. Hasil ujikaji menunjukkan bahawa CSAC adalah penjerap yang sesuai untuk penjerapan pewarna MB di dalam turus lapisan tetap. Bagi peningkatan skala bulus 24 jam, jumlah ketinggian lapisan karbon yang digunakah amat sesuai bagi industri yang beroperasi 24 jam sehari.
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The dynamic fixed bed adsorption has been recommended as a practical method for the removal of contaminants from the industrial effluent. In this work, the real intention of the study was to investigate the effective removal of Methylene Blue (MB) onto coconut shell activated carbon (CSAC) in a fixed-bed column. The important parameters such as feed flow rate of MB (4-7 mL/min), bed height of CSAC (2-4 cm) and initial dye concentration (20-60 ppm) on the behavior of the breakthrough curves and adsorption performance was studied. The results indicated that the breakthrough curves were dependent on the feed flow rates of MB solution, bed height of CSAC and initial MB concentration. The breakthrough time, saturation time and adsorption capacity were recorded for all process variable. Adams-Bohart, Thomas, MDR, and BDST model were selected to study the performance of the column adsorption. The adsorption capacity, the rate constant, non-linear coefficient of determination (r2) and sum the squared of error (SSE) of each model was determined. Thomas, MDR and BDST model fitted well the adsorption data compared than the Adam-Bohart model. The results indicated that the CSAC was shown to be suitable adsorbent for adsorption of MB dye using fixed-bed adsorption column. Total bed height for scale-up 24 hours was studied and it is well suited for industries that operated for 24 hours.
Dynamic adsorption of methylene blue using microwave-irradiated coconut shell activated carbon / Nur Zalikha Syamimi Jaafar