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研究了酸式和碱式纤维素基磁性聚偕胺后树脂(AMAO、BMAO)吸附KMnO4动力学。AMAO吸附KMnO4为二级反应,速车常数为9.0×10-4s-1。参加吸附的AMAO上的偕胺后基()总量与被吸附的KMnO4总量的摩尔比的测定结果表明偕胺时基与KMnO4等摩尔结合,化学吸附占绝对优势。BMAO超当量吸附KMnO4,吸附容量对KMnO4浓度关系符合Freundlich等温吸附式和Langmuir等温吸附式,暗示着BMAO对KMnO4同时进行化学和物理吸附。测得KMnO4与配体结合的摩尔比2.1,吸附平衡常数为9.65×1010。参加吸附的BMAO上的偕胺肟基总量与被吸附的KMnO4总量的摩尔比为2:9,即物理吸附与化学吸附的比例为8:1,显然,在BMAO吸附KMnO4过程中以物理吸附为主。
The kinetics of KMnO4 adsorption on acidic and basic cellulose-based polyamidoamine resins (AMAO, BMAO) was investigated. AMAO adsorption KMnO4 for the second reaction, speed constant 9.0 × 10-4s-1. The results of the determination of the molar ratio of the total amount of amidoamine (A) adsorbed on the adsorbed AMAO to the total amount of KMnO4 adsorbed showed that the amidometric time base is equimolar to KMnO4 and chemical adsorption is dominant. BMAO super-equivalent adsorption KMnO4, adsorption capacity on the KMnO4 concentration in line with the Freundlich isotherm and Langmuir isothermal adsorption, suggesting that the BMAO KMnO4 chemical and physical adsorption. The molar ratio of KMnO4 to the ligand was determined to be 2.1 and the adsorption equilibrium constant was 9.65 × 1010. The total amount of amidoxime group adsorbed on the adsorbed BMAO and the total amount of KMnO4 adsorbed was 2: 9, that is, the ratio of physical adsorption to chemisorption was 8: 1. Obviously, when the BMAO adsorbed KMnO4 was physically Adsorption based.