摘要
选用浙江缙云产颗粒状天然沸石为材料对氨氮和磷进行吸附动力学和吸附等温试验,考察初始浓度、振荡时间对吸附量、去除率的影响。试验结果表明:沸石对氨氮和磷吸附显示出"快速吸附,缓慢平衡"的特点;吸附动力学过程符合准二级动力学模型;吸附等温线更符合Freundlich方程;氨氮初始浓度小于7 mg/L、振荡时间在1h内和磷初始浓度小于30 mg/L、振荡时间在15 min内,吸附量、去除率随初始浓度、振荡时间增加而增加,当超过此阶段后,吸附量增加缓慢、去除率下降。
The adsorption of ammonia nitrogen and phosphorus by the natural zeolite which produced in Zhejiang Jinyun was studied;included adsorption isothermal and dynamics experiments. The results showed that： the adsorption of ammonia nitrogen and phosphorus by natural zeolite showed the characteristic which is the ＂ rapid absorption, slow balance＂ ; the second quasi - dynamic model well descried the process of adsorption. Adsorption isotherm is more in line with the Freundlich equation. When the initial concentration of ammonia nitrogen is less than 7 mg/L and the time of oscillation is less than 1 h, and the initial concentration of phosphorous less than 30 mg/L and the time of oscillation is less than 15 min, adsorption and the removal efficiency increased when the initial concentration and the time of oscillation increased;while going beyond this stage, adsorption increased slowly and the removal efficiency declined.
出处
《环境科学与管理》
CAS
2009年第4期72-74,77,共4页
Environmental Science and Management
基金
湖北省教育厅重点项目(D20081009)
武汉市青年科技晨光计划项目(200750731276)
水利部江湖治理与防洪重点实验室开放研究基金资助项目(2007-07)
国家星火计划资助项目(2007EA761001)
关键词
天然沸石
氨氮
磷
吸附动力学试验
吸附等温试验
natural zeolite
ammonia nitrogen
phosphorus
adsorption dynamics experiment
adsorption isothermal experiment
