摘要
为筛选适合的人工快速渗滤系统填料,通过动态吸附、等温吸附和解吸实验,研究了黏土陶粒、页岩陶粒、细砂和粗砂的吸附和解吸特性。结果表明,Freundlich和Langmuir模型均能较好地拟合各填料对氨氮和磷的吸附特征,对氨氮和磷的饱和吸附量由大到小依次为:页岩陶粒>细砂>粗砂>黏土陶粒,对氨氮和磷的解吸率由大到小依次为:黏土陶粒>细砂>粗砂>页岩陶粒。对于人工快速渗滤系统而言,当其处理后的出水用于农灌时,为了提高其水力负荷、减少其堵塞的可能性,应该选择黏土陶粒和粗砂作为其填料。
In order to select suitable constructed rapid infiltration system substrates,the adsorption and desorption properties of clay ceramsite,shale ceramsite,fine sand and coarse sand were studied through dynamic adsorption,isothermal adsorption and desorption experiment.The results showed that Freundlich and Langmuir isotherms could well fit the adsorption process,the maximum adsorption capacities of ammonia nitrogen and phosphorus ranked as:shale ceramsite>fine sand>coarse sand>clay ceramsite,and the desorption rate of ammonia nitrogen and phosphorus ranked as:clay ceramsite>fine sand>coarse sand>shale ceramsite.For the constructed rapid infiltration system,clay ceramsite and coarse sand should be selected as substrates in order to increase its hydraulic load and reduce the possibility of blocking when the treated effluent is used for agricultural irrigation.
作者
晏雯雯
张国珍
张超
武福平
师旭军
王万红
YAN Wen-wen;ZHANG Guo-zhen;ZHANG Chao;WU Fu-ping;SHI Xu-jun;WANG Wan-hong(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Engineering Research Center for Comprehensive Utilization of Water Resource in Cold and Arid Regions of Ministry of Education,Lanzhou 730070,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第6期1334-1338,共5页
Applied Chemical Industry
基金
国家自然基金(51768031)
甘肃省重点研发计划(17YF1NA056)。
关键词
人工快速渗滤系统
氨氮
磷
吸附
解吸
constructed rapid infiltration system
ammonia nitrogen
phosphorus
adsorption
desorption
