As reviewed by Luan et al. [
5], the purification methods of H
2O
2 solution involve distillation, crystallization, ion exchange, membrane process and adsorption. Distillation and crystallization are usually energy intensive, with the requirement for pre-purification process. Various resins (cation exchange resins for the removal of metallic ions, anion exchange resins for acid radical anions and macroporous adsorption resins for TOC) are widely utilized for the purification of H
2O
2 solution. However, the resins could induce a decrease in the stability of H
2O
2, posing a safety risk [
6]. Abejon et al. [
7–
9] systematically studied the reverse osmosis process for a 35% hydrogen peroxide solution produced by the anthraquinone process using polyamide membrane. The contents of Na and Al ions were observed to decrease from 20895 and 1067 μg·L
–1 to 1565 and 87 μg·L
–1, respectively. The effective working time of the membrane was limited to 72 h due to the strong oxidation of H
2O
2. Lin et al. [
10] found that commercial lignite activated carbon could significantly reduce TOC in a 35% H
2O
2 solution from 140 mg·L
–1 to less than 20 mg·L
–1 with a 2% decomposition rate of H
2O
2. In comparison, adsorption stands out from these methods because of low energy consumption, safe operation and easy handling [
11–
13]. However, the choice of adsorbent is a great challenge due to the severe separation conditions as a result of easy decomposition, strong acidity and oxidizability of H
2O
2 solution, and a variety of impurities (TOC, phosphate and metallic ions).