摘要
以环氧氯丙烷和二乙烯三胺反应合成1种高分子聚胺(以下简称PED),采用FTIR,DSC-TG,EDX和SEM等方法对产物进行结构表征,并考察合成的高分子聚胺PED水溶液中硫酸根离子的脱除能力。研究结果表明:聚合产物PED热稳定性随产物氨基含量增加而增大,热分解温度可达285℃;产物PED对硫酸根有很强的脱除能力,其中,产物投加量的增加和酸性条件均有利于硫酸根脱除率的提高;在中性和酸性溶液中(硫酸根离子质量浓度为2.0g/L),产物脱除硫酸根达到平衡的时间分别为30min和10min;当反应时间为30min时,在中性和酸性水溶液中硫酸根脱除率分别可达90.2%和99.6%,产物吸附量分别为175mg/g和191mg/g;处理后水溶液中硫酸根离子质量浓度降为196mg/L和8mg/L,均远低于国家生活饮用水卫生标准的250mg/L(GB3838—2002)要求。
Polyamine macromolecule PED was synthesized by condensation polymerization of epichlorohydrin and diethylenetriamine. As-prepared granule of PED was characterized by FTIR, DSC-TG, EDX, SEM and the sulfate removal performance of PED in aqueous solutions was studied. The results show that thermo-stability of the products increases with the increase of amine content, and the decomposition temperature can reach 285 ℃. The sulfate removal capability of PED is strong. The process equilibrium time is 30 min and 10 min respectively in neutral and acidic aqueous solutions containing 2.0 g/L sulfate ions. When the reaction is kept for 30 rain, the removal ratio of sulfate ions can reach 90.2% and 99.6% in neutral and acidic solutions with the absorption capacity 175 mg/g and 191 mg/g, respectively, while the sulfate concentrations of the filtrate are 196 mg/L and 8 mg/L, respectively, which are both lower than the demand of 250 mg/L of GB 3838-2002.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第2期422-427,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金重点项目(50830301)
教育部科技重大项目(308019)
国家科技支撑计划项目(2007BAC25B01)
湖南省科技计划项目(2008SK4031)
湖南省科技计划重点项目(2007SK2006)
关键词
环氧氯丙烷
二乙烯三胺
硫酸根
吸附性能
epichlorohydrin
diethylenetriamine
sulfate ions
adsorption performance
