|تعداد مشاهده مقاله||111,555,231|
|تعداد دریافت فایل اصل مقاله||86,184,837|
Fixed Bed Column Modeling of Cd(II) Adsorption on Bone Char Using Backward Bayesian Multiple Linear Regression
|مقاله 17، دوره 6، شماره 2، تیر 2020، صفحه 441-451 اصل مقاله (794.58 K)|
|نوع مقاله: Original Research Paper|
|شناسه دیجیتال (DOI): 10.22059/poll.2020.294364.727|
|M. J. Amiri* 1؛ M. R. Mahmoudi2؛ M. Khozaei3|
|1Department of Water Engineering, College of Agriculture, Fasa University, P.O.Box 74616-86131, Fasa, Iran|
|2Department of Statistics, Faculty of Science, Fasa University, P.O. Box 74616-86131, Fasa, Iran|
|3Department of Water Engineering, College of Agriculture, Shiraz University, P.O. Box 71365, Shiraz, Iran|
|In this work, the backward Bayesian multiple linear regression (BBMLR) as a new approach is presented to predict the adsorption efficiency (AE) of Cd(II) ions by ostrich bone char (OBC) in the fixed bed adsorption with four operational variables consisting of pH (2-9), inlet Cd(II) concentration (Co= 25-100 mg/L), bed depth (h= 3-9 cm) and feed flow rate (Q= 0.5-30 mL/min). The performance of the BBMLR was evaluated using the coefficient of determination (R2), normalized root means square error (NRMSE) and mean residual error (MRE). The AE of Cd(II) ions by OBC increased from 42.3% to 99.9% when pH was increased from 2 to 9 with h of 6 cm and Q of 1.5 mL min-1. It was found that the AE dramatically increased from 70.5% to 99.9% with decreasing Q from 30 to 0.5 mL min-1 at pH of 7 and h of 6 cm. At pH= 7 and Q= 1.5 mL min-1, the AE increased from 71.9% to 100% when h increased from 3 to 9 cm. The BBMLR model presented excellent performance (NRMSE=6.69%) for predicting Cd(II) removal in a continuous adsorption system, although it gave a slight underestimation (approximately 3.52%). The BBMLR is more sensitive to the pH, followed by h and Q, while the Co has no significant effect on it. This research displays that OBC has great potential as an eco-friendly low-cost adsorbent in removing Cd(II) ions from the contaminated waters.|
|Cd(II)؛ adsorption efficiency؛ ostrich bone char؛ BBMLR. model|
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Pollution, 6(2): 451-461, Spring 2020
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