摘要
对微波/稀土元素铈吸附剂的制备条件及其吸附降解低浓度氨氮的反应条件进行优化,并采用XRD、SEM和FTIR对负载型吸附剂进行表征.结果表明,负载型吸附剂内部结构发生变化,比表面积增大,羟基数量增多;负载后的生物炭对氨氮的处理效果明显优于原生物炭,其较为合适的制备条件为固液比(指原生物炭质量与氯化亚铈溶液体积之比,单位g/m L)1∶25,浸渍pH值为10;在氨氮溶液浓度为50 mg/L,初始pH值为10,反应温度为50℃,反应时间为120 min,吸附剂投加量为5 g/L条件下,氨氮吸附量达到最大,为11.297 mg/g,且反应过程符合准二级动力学模型.
The preparation conditions of the absorbent modified with microwave-Ce（MBC） and the reaction conditions for low-concentration ammonia adsorption were optimized, and MBC were characterized by XRD,SEM and FTIR. The experimental results indicate that the inner structure of MBC has changed; specific surface area and the number of hydroxide radical have increased. The treatment effect for ammonia of loaded biocharis superior to that of biochar（BC） and the preparation conditions is optimum when solid-to-liquid ratio is 1 ∶25 and pH of dipping is 10. The maximum adsorption capacity of ammonia reaches 11.297 mg/g when solution concentration is 50 mg/L, initial pH is 10, reaction temperature is 50 ℃, reaction time is 120 min, and absorbent dosage is 5 g/L.Its adsorption process conforms to the pseudo-second-order kinetics model.
出处
《有色金属科学与工程》
CAS
2017年第4期131-136,共6页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51568023
51164014)
江西省级创新专项资金项目(YC2016-S319)
关键词
生物炭
微波-Ce联合改性
氨氮
吸附
biochar（BC）
union modification of microwave-Ce
ammonium nitrogen
adsorption
作者简介
通信作者：陈云嫩（1970-）,女,博士,教授,主要从事废水处理及废渣资源化方面的研究,E-mail：550223495@qq.com.
