负载Fe^0半焦去除水体抗生素的实验研究

STUDY ON THE REMOVAL OF ANTIBIOTICS IN AQUATIC ENVIRONMENT BY IRON LOADED BIOCHAR

采用高温蒸气活化-气相还原方法对生物质半焦进行改性并用于水体抗生素吸附,对吸附饱和的改性半焦采用微波脱附再生,研究了吸附及再生过程影响因素。结果表明,溶液温度20℃、四环素初始质量浓度100mg/L、改性半焦投加量为0.40g/L时,去除率可达97.43%;优化再生条件为辐照功率400W、辐照时间2min、改性半焦水的质量分数30%,此时再生焦对四环素的吸附容量为原改性半焦的98%,再生得率为94.01%。

The biochar was modified by high temperature steam activation and vapor phase deoxidation, then it was used to adsorbed antibiotics in aquatic environment. The adsorption saturation modified biochar was regenerated by microwave irradiation. Influence factors in process of adsorption and desorption were investigated. The result showed that when the temperature, initial mass concentration of TC and absorbent dosage was 20 ℃, 100 mg/L and 0.40 g/L,respectively, the removal rate could reach 97.43%. The optimum regeneration condition was as follows： the irradiation power is 400 W, the irradiation time is 2 min, and the concentration of modified biochar is 30%. In above conditions, the adsorption capacity of tetracycline by generated biochar was98% of that by the raw modified biochar, and the regeneration rate is 94.01%.