AI Article Synopsis
- A new composite material called titanium-ferrocyanide/chitosan melamine sponge (TFCM) has been developed to efficiently remove cesium (Cs) from radioactive wastewater.
- TFCM shows excellent adsorption capabilities across a wide pH range (3-11) and maintains high selectivity for Cs, even in the presence of other cations like K, Na, and Ca.
- The material can easily be separated from water, demonstrates consistent performance over multiple cycles, and can reduce Cs concentration from 20 mg/L to 10 μg/L, making it a promising solution for wastewater treatment.
Article Abstract
Selectively and efficiently removing Cs is of great urgency and challenge for the treatment of radioactive wastewater. In this work, titanium-ferrocyanide/chitosan melamine sponge composite (TFCM) was synthesized by cross-linking and titanium-doping strategy, and employed to remove Cs from water. The obtained TFCM exhibited excellent adsorption performance for Cs, due to its porous and 3D skeleton structure. The TFCM demonstrated a broad range of pH (pH = 3-11) suitability and high removal ratio of Cs. The adsorption behavior of TFCM on Cs conformed to the Langmuir adsorption process and pseudo-second-order kinetics model. Remarkably, TFCM displayed a high selectivity in Cs adsorption with the presence of other cationic (K, Na, Ca, Mg). TFCM could easily be separated from water because of loading on the melamine sponges. Besides, the TFCM could maintain more than 78.1 % removal ratio of Cs after five adsorption-desorption cycles. Furthermore, the concentration of Cs could decrease to 10 μg/L from 20 mg/L with a prominent removal ratio of 99.95 %. Characterization results revealed that the adsorption process of Cs by TFCM was dominated by ion-exchange. In summary, the TFCM is a high selectivity, efficiently and easily separable adsorbent with excellent application prospects for removing Cs from radioactive wastewater.
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| http://dx.doi.org/10.1016/j.ijbiomac.2024.137440 | DOI Listing |
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