摘要
为了缓解反渗透膜的CaF2垢堵塞情况,使用2-磷酸丁烷-1,2,4-三羧酸(PBTCA)和酪氨酸(Tyr)对聚环氧琥珀酸(PESA)进行改性得到PBTCA-PESA和PBTCA-Tyr-PESA。通过表征确定了其结构和热稳定性。采用静态实验和动态实验测试阻垢性能。结果表明,静态实验中,投加量为200 mg/L时,PBTCA-PESA和PBTCA-Tyr-PESA对CaF2的阻垢率分别为94.92%和98.72%,具有络合Ca2+的能力,能够延长结晶诱导时间;动态实验中,膜比通量下降率分别为34%和27%,展现出较好的分散CaF2性能,有效缓解了膜堵塞。X射线衍射和扫描电镜表征显示,PBTCA-PESA和PBTCA-Tyr-PESA可以引起CaF2晶体的不规则生长,破坏晶体的形成并改变晶型,主要阻垢机理为分散作用、晶格畸变及螯合作用。
In order to alleviate the CaF2 scale blockage of reverse osmosis membranes,poly(epoxysuccinic acid)(PESA)was modified with 2-phosphobutane-1,2,4-tricarboxylic acid(PBTCA)and tyrosine(Tyr)to obtain PBTCA-PESA and PBTCA-Tyr-PESA.The static and dynamic experiments were used to test the scale inhibition performance,and the results show that in the static experiment,the scale inhibition rates of PBTCA-PESA and PBTCA-Tyr-PESA on CaF2 are 94.92%and 98.72%,respectively,at the dosage of 200 mg/L,which possess the ability of complexing Ca2+to prolong the time of crystalline induction;and in the dynamic experiment,the decrease rates of the specific flux of the membrane are 34%and 27%,showing better performance in dispersing CaF2 and effectively alleviating membrane blockage.XRD and SEM characterization show that PBTCA-PESA and PBTCA-Tyr-PESA can cause the irregular growth of CaF2 crystals,destroy the crystal formation and change the crystalline shape,and the main scale inhibition mechanisms are dispersive effect,lattice aberration,and chelating effect.
作者
张益豪
秦哲
白昕竹
马丙太
赵春霞
路达
Yihao Zhang;Zhe Qin;Xinzhu Bai;Bingtai Ma;Chunxia Zhao;Da Lu(School of Eco-Environment,Hebei University,Baoding 071000,China;Hebei Institute of Environmental Geology Exploration,Shijiazhuang 050011,China)
出处
《高分子材料科学与工程》
CSCD
北大核心
2024年第12期127-136,共10页
Polymer Materials Science & Engineering
基金
河北省自然科学基金面上项目(E2020201036)。
关键词
酪氨酸
2-磷酸丁烷-1
2
4-三羧酸
聚环氧琥珀酸
氟化钙垢
动态实验
阻垢机理
tyrosine
2-phosphobutane 1,2,4-tricarboxylic acid
polyepoxysuccinic acid
calcium fluoride
dynamic experiment
scale inhibition mechanism
