摘要
为了改进阻垢剂性能、获得更加绿色环保的药剂,将天冬氨酸-柠檬酸共聚物(PAC)和2-磷酸基-1,2,4-三羧酸丁烷(PBTCA)复配得到低氮低磷型复合药剂PAC-PBTCA,在分析不同抑制机理协同作用的基础上,利用静态阻垢法分别评价了PAC、PBTCA 2种单体和二者的复配药剂对高盐分下硫酸钙的阻垢效率,结合垢体的原子力显微镜图(AFM)和X射线衍射图(XRD)探讨了PAC-PBTCA复合药剂的高效抑垢机制。结果表明,当PAC与PBTCA的物质的量比为1∶2,水样Ca^2+质量浓度为3500 mg/L,pH值为7,恒温时间为25 h,恒温温度为70℃时,PAC-PBTCA复合药剂对CaSO4阻垢效率高达93.51%,明显优于单体PAC的90.69%和PBTCA的83.18%;抑垢机制分析表明PAC-PBTCA复合药剂通过降低微晶粒径而达到抑垢效果,当PAC和PBTCA以特定比例同时存在时两者具有良好的协同作用和水溶性。PBTCA可吸附在微晶体上,PAC通过其良好的亲水性和线性搭桥作用可将多个微晶分散到水中。
In order to improve the performance of scale inhibitor and obtain more environmental friendly agents,compound PAC-PBTCA with low nitrogen and low phosphorus was prepared by mixing aspartic acid citric acid copolymer(PAC)and 2-phosphoric acid-1,2,4-three carboxylic butane(PBTCA).Based on the analysis of synergistic action of different inhibition mechanisms,static scale inhibition method was used to evaluate the scale inhibition efficiency of PAC,PBTCA and the compound agents of the above two on calcium sulfate under high salinity.Combined with atomic force microscope(AFM)and X ray diffraction of the scale,the efficient scale-inhibiting mechanism of PAC-PBTCA compound agent was discussed.The results showed that,when the mass ratio of PAC to PBTCA were 1:2,the mass concentration of Ca^2+ in water sample was 3500 mg/L,the pH value was 7,the constant temperature time was 25 h,the constant temperature was 70℃,the scale inhibition rate of CaSO4 by the compound agent PAC-PBTCA could be as high as 93.51%,which was obviously better than that of the monomer PAC(90.69%)and PBTCA(83.18%).The analysis of scale inhibition mechanism showed that,good scale inhibition effect of the compound agent PAC-PBTCA could be obtained by reducing microcrystal diameter,when the PAC and PBTCA existed at the same time with certain ratio,the two had good synergistic effect and water solubility.PBTCA can adsorb microcrystal,while PAC can disperse many microcrystallites into water through its good hydrophilicity and linear bridging effect.
作者
贾晓宇
张玉玲
熊广森
王姣龙
JIA Xiao-yu;ZHANG Yu-ling;XIONG Guang-sen;WANG Jiao-long(Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control,Department of Environmental Science and Engineering,North China Electric Power University,Baoding 071003,China)
出处
《工业用水与废水》
CAS
2020年第6期59-64,共6页
Industrial Water & Wastewater
基金
水体污染控制与治理科技重大专项(2017ZX07101-001-07)
国家自然科学基金资助项目(51308211)
河北省自然科学基金(E2016502097)。
关键词
配合物
复合材料
可生物降解
阻垢效率
抑垢机制
complex
compound material
biodegradable
scale inhibition effect
scale inhibition mechanism
