TY - JOUR ID - TI - Adsorption Study of Nitrate Anions by Different Materials Using Fixed Bed Column AU - Noor S. Abbood AU - Anaam A. Sabri PY - 2019 VL - 37 IS - 1 Part (c) special SP - 156 EP - 162 JO - Engineering and Technology Journal مجلة الهندسة والتكنولوجيا SN - 16816900 24120758 AB - Abstract- MCM-41is, a mesoporous material with a hexagonal structure, has ahigh surface area, high pore vol., and low mass density. Continuous adsorptionfixed bed of NH2-MCM-4I adsorbent was utilized for the removal of nitrate anionsfrom aqueous solutions. The effect of adsorbent weight (0.5, 1, 2 gm), flow rate(0.5, 1.0, 1.5 ml/min) and initial NO3- concentrations (50, 75, 100 mg/l) onbreakthrough curves were studied. It was found that breakthrough time increaseswith increasing column bed height and decreases with increasing NO3- inletconcentration and flow rate. The highest removal percentage (75.2%) achieved atinlet concentration of 100 mg/L of NO3- anion, 1gm adsorbent weight and 1.5mL/min flow rate. Thomas and Yan adsorption models showed a good fit to theexperimental data. Removal of nitrate anion by traditional activated carbon wasalso investigated and the results were compared with the nitrate removal by NH2-MCM-41. It was concluded that NH2-MCM-41 is more efficient in nitrate removalthan activated carbon and the maximum removal percentage of nitrate anions bytraditional activated carbon was found to be 55.8%.

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