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Updated: Jan 25, 2026

Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
Published on: August 25, 2016
Efficient adsorption of Sr2+ from simulated high-level liquid waste by 4A zeolite
Xiang Qin1, Xiliang Guo2, Xia Tao2
1China Institute of Radiation Protection, Taiyuan, 030006, Shanxi, China. 18035128962@163.com.
Abstract:
The effective separation of radioactive strontium-90 (90Sr) from high-level liquid waste (HLLW) produced by the PUREX process is essential for enhancing nuclear waste disposal safety and minimizing related expenses. This research work revealed that 4A zeolite showed excellent separation efficiency and selectivity for Sr2+ in very acidic and alkaline environments that mimic actual HLLW. 4A zeolite displayed superior performance, with an adsorption efficiency of 88.2%, a distribution coefficient (Kd) of 1298.47 mL/g, and a maximum sorption capacity of 18.734 mg/g in comparison to numerous standard sorbents reported for the removal of Sr2+. It demonstrated prompt adsorption kinetics (~ 2 h), extensive pH tolerance (pH 4-9), and outstanding resistance to radiation-induced degradation. In comparison to alternative adsorbents, 4A zeolite presents a distinctive amalgamation of superior efficacy, economical costs, simple synthesis, and environmental compatibility, making it a highly promising option for the remediation of 90Sr in complex nuclear waste streams.
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