| Response Surface Modeling and Sensitivity Analysis of Iron Removal from Steel Industry Wastewater Using Activated Carbon |
| کد مقاله : 1641-IWWA |
| نویسندگان |
|
بهنام کریمی مطلق *1، آرزو چاجایی2 1ندارم 2اصفهان-شهرستان مبارکه |
| چکیده مقاله |
| Iron contamination in steel industry wastewater can create environmental challenges and affect treatment processes, highlighting the importance of effective iron removal and reliable performance evaluation. This study investigated iron removal from real steel industry wastewater using a pilot-scale activated carbon column. Response surface methodology (RSM) and sensitivity analysis were employed to examine the effects of operating conditions on removal efficiency. Seventeen experiments were conducted using a three-factor Box–Behnken design, considering flow rate, solution pH, and initial iron concentration. A quadratic model was developed to describe the experimental results, and its performance was evaluated using analysis of variance and leave-one-out cross-validation (LOOCV). The highest experimentally observed iron removal efficiency was 65%, achieved at a flow rate of 5 m³/h, pH 6, and an initial iron concentration of 8 mg/L. The model explained 98.35% of the variation in the experimental data (R² = 0.9835; adjusted R² = 0.9622). Cross-validation also demonstrated good internal predictive performance (R² = 0.9471; RMSE = 1.234 percentage points). Sensitivity analysis identified flow rate as the most influential linear factor near the design center, followed by pH and initial iron concentration. Significant quadratic terms further indicated nonlinear relationships between operating conditions and removal efficiency. By combining experiments on real steel industry wastewater with statistical modeling, this study provides a practical basis for evaluating activated carbon column performance and identifying influential operating parameters under the investigated conditions. |
| کلیدواژه ها |
| Activated Carbon, Iron Removal, Steel Industry Wastewater, Response Surface Methodology, Sensitivity Analysis, Fixed-Bed Column. |
| وضعیت: پذیرفته شده برای ارسال فایل های ارائه پوستر |
