摘要
利用原位合成法制备了磷酸银-聚醚砜复合膜材料,通过扫描电镜对复合膜材料表面形貌特征进行了分析。在吸附实验中,通过改变复合膜的吸附条件:磷酸银用量、吸附接触时间、吸附温度、待吸附溴离子溶液的初始pH,探究其对复合膜吸附水中溴离子性能的影响,同时对该吸附过程进行了吸附动力学的分析。结果表明:该复合膜材料对水溶液中的溴离子具有较高的吸附量和吸附率。当m(Ag_(3)PO_(4))/m(PES)的值(质量分数)为0.5,吸附时间为6h,吸附温度为25℃、溶液初始pH为7时,复合膜材料对水中溴离子的吸附性能较好,优化条件下,复合膜对水溶液中溴离子的吸附量最高可达57.23mg/g,吸附率最高可达88.04%。复合膜吸附水中溴离子过程与准二级动力学模型相符,且拟合值可达0.99。
Silver phosphate/polyethersulfone( Ag_(3)PO_(4)/PES) composite membranes were prepared by in-situ synthesis, and analyzed the surface morphology of the membranes by SEM.In the adsorption experiments, by changing the adsorption conditions of the membranes: the amount of Ag_(3)PO_(4),adsorption contact time, adsorption temperature, initial pH of Brsolution to be adsorbed to investigate the effect of the membranes on the properties of Brin water.At the same time, the adsorption kinetics of the adsorption process was analyzed.The results showed that the membranes had high adsorption capacity and rate for Brin aqueous solution.When the value of m(Ag_(3)PO_(4))/m(PES) was 0.5,the adsorption time was 6 h, the adsorption temperature was 25℃,and the initial pH value of solution was 7,the adsorption performance of the membranes to Brin water was better.Under the optimized conditions, the adsorption capacity of the membranes to Brin aqueous solution can reached 57.23 mg/g, and the adsorption rate can reached 88.04%.The bromine ion process in the adsorption water of the membranes was consistent with the Pseudo-second-order kinetic model, and the fitting value can reached 0.99.
作者
管若伶
孙畅
Guan Ruoling;Sun Chang(Institute of Marine Science and Technology,Hainan Tropical Ocean University,Sanya 572022)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第10期81-85,共5页
New Chemical Materials
基金
海军工程大学自主立项科研项目(2022505040)
海南省自然科学基金项目(520QN278)
海南热带海洋学院教育教学改革研究项目(RHYjg2021-04)
海南热带海洋学院校级引进学科带头人和博士研究生科研启动项目(RHDXB201810)。
关键词
溴离子
磷酸银
吸附
聚醚砜
原位合成法
bromine ion
silver phosphate
adsorption
polyethersulfone
in-situ synthesis
