For a solution of 1 mol/L HNO3, the QCs of CST is 0.63 mmol/g; for a solution pH=3, QCs reach the maximum 1.6 mmol/g. The results show that CST can be use as ion exchanger for Cs in the acidic solution.

• 在1mol/L HNO3的水溶液中，CST对Cs的交换量为0.；63mmol/g，在pH=3时，CST对Cs的交换量达最大为1