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酸性吸附树脂对1,2-苯并异噻唑-3-酮的吸附性能研究
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Abstract:
本文以单宁酸修饰的超高交联吸附树脂(TAMR)、邻苯二甲酸酐修饰的超高交联吸附树脂(PTAMR)和脯氨酸修饰的超高交联吸附树脂(PROMR)为吸附剂，通过等温吸附实验和吸附动力学实验，探讨了3种酸性吸附树脂对水中的1,2-苯并异噻唑-3-酮(BIT)的吸附性能。结果表明3种酸性树脂对BIT均具有较好的吸附性能，吸附过程存在较明显的化学吸附作用。Langmuir方程能够很好地拟合BIT在3种酸性树脂上的吸附等温线，吸附均为单分子层吸附过程。3种树脂对BIT的吸附均为自发且熵增加的过程，在TAMR上的吸附过程放热，在PTAMR和PROMR上的吸附过程吸热。3种吸附树脂对BIT的吸附动力学过程符合准一级动力学方程，颗粒内扩散是3种树脂吸附BIT的主要控制步骤。
In this paper, tannic acid modified hypercrosslinked resins (TAMR), diphthalic anhydride modified hypercrosslinked resins (PTAMR), and proline modified hypercrosslinked resins (PROMR) were used as absorbents. The adsorption performance of 1,2-Benzisothiazolin-3-One (BIT) onto three acid functional groups modified adsorption resins was studied by isothermal adsorption experiment and adsorption dynamics experiment. The results showed that all the three resins had good adsorption performance for BIT, and there was an apparently chemical adsorption in the adsorption process. Langmuir equation could fit the adsorption process perfectly. The adsorption of BIT onto three resins was mainly single molecular layer adsorption mode. The adsorption of BIT onto three resins was spontaneous process of increasing entropy. The adsorption process of BIT onto TAMR was endothermic while the process was exothermic onto PTAMR and PROMR. The adsorption kinetics of BIT onto three resins was in accordance with the pseudo-first order kinetic equation, and the intra-particle diffusion was the main control step.
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