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研究了201×7强碱性阴离子交换树脂吸附浓海水中溴的动力学行为,测定了吸附率随时间的变化关系,考察了温度、溶液初始浓度、搅拌转速和pH值对树脂吸附溴的动力学实验的影响.研究表明:该树脂对溴的最大吸附量为2.489 4 mg/mL;吸附过程的控速步骤主要为颗粒扩散控制;吸附过程的表观活化能Ea=8.98 kJ/mol,反应级数n=0.531 4;搅拌转速对该吸附过程的影响不大;pH值控制在3.0~3.5范围内有利于树脂对溴的吸附.
The kinetics of adsorption of bromine in concentrated seawater by 201 × 7 strong basic anion exchange resin was studied. The relationship between adsorption rate and time was studied. The effects of temperature, initial concentration of solution, stirring speed and pH on the kinetics of bromine adsorption The experimental results showed that the maximum adsorption capacity of bromine for this resin was 2.489 4 mg / mL. The rate-controlling step of the adsorption process was controlled mainly by particle diffusion. The apparent activation energy Ea was 8.98 kJ / mol. The reaction The number of stages n = 0.531 4; stirring speed has little effect on the adsorption process; pH control in the range of 3.0 ~ 3.5 is conducive to the adsorption of bromine resin.