Water contamination by cadmium (Cd), which is a toxic heavy metal widely used in many industrial processes, is a pervasive environmental problem. This study investigated the removal of Cd by dry cyanobacterium Aphanothece sp cultivar in adsorption columns The effect of inlet Cd concentrations (1.00 – 4.85mg/L), flow rates (0.30-0.60 L/h) and bed height (4.6 -7.2 cm) on the breakthrough characteristics of the adsorption column was investigated. The maximum adsorption capacity and efficiency were found to be 8.20 mg/g and 89.07 %, respectively with a flow rate of 0.60 L/h and 4.85 mg/L inlet concentration of Cd. The fixed bed adsorption data were fitted to three well known fixed bed empirical models namely Thomas, Adam-Bohart and Yoon-Nelson. The experimental results well fitted with the models mentioned above with R² of greater than 0.98 at different conditions. The regeneration efficiency of benthic cyanobacterium Aphanothece sp cultivar based adsorbent was studied using 0.1 M HCl. Repetitive adsorption-regeneration experiment show that, at the end of the fifth cycle, the desorption efficiency decreased by 21%. Thus, further research is necessary to improve the reusability of dried biomass of cyanobacterium Aphanothece sp adsorbent.

镉（Cd）是一种有毒的重金属，在许多工业过程中广泛使用，对水的污染是一个普遍存在的环境问题。本研究研究了干燥蓝藻Aphanothece sp对镉的去除吸附塔中的品种研究了入口Cd浓度（1.00 – 4.85mg / L），流速（0.30-0.60 L / h）和床高（4.6 -7.2 cm）对吸附塔穿透特性的影响。发现最大吸附容量和效率分别为8.20 mg / g和89.07％，流速为0.60 L / h和4.85 mg / L Cd入口浓度。将固定床吸附数据拟合到三个众所周知的固定床经验模型，即Thomas，Adam-Bohart和Yoon-Nelson。实验结果与上述模型在不同条件下的R ²均大于0.98完全吻合。底栖蓝细菌Aphanothece sp的再生效率使用0.1 M HCl研究了基于品种的吸附剂。重复吸附-再生实验表明，在第五个循环结束时，解吸效率降低了21％。因此，有必要进行进一步的研究以改善蓝藻Aphanothece sp吸附剂的干燥生物质的可重复使用性。