Zhu Zhi-Ping, Tang Xue-Ying, Yin Zhao-Hui, Yu Wei-Wei
Changsha University of Science & Technology, Changsha, Chinese Hunan, China E-mail:
Water Sci Technol. 2014;70(7):1188-94. doi: 10.2166/wst.2014.342.
In this study, a dynamic cycle test, a static immersion method and a pyrolysis experiment were combined to examine the characteristics of SO4(2-) released from several new and old cation exchange resins used in condensate polishing systems for power plants. The results show that the quantity and velocity of SO4(2-) released from new and old resins tend to balance in a short time during the dynamic cycle experiment. SO4(2-) is released by 1500H (monosphere super gel type cation exchange resins) and 001 × 7 (gel type cation exchange resins) new and old cation exchange resins, the quantity of which increases according to immersion time. In the pyrolysis experiment, the quantity of SO4(2-) released from resins increases and the pH of the pyrolysis solution transforms from alkaline to acidic with an increase in temperature.
