Effective adsorption of metal ions by modified clinoptilolite zeolite from simulated radioactive solution

Li, Qun; Jiang, Ding-wen; Hou, Dengyong; Chen, Wei; Hu, Xiuting; He, Yufeng

doi:10.1007/s10967-018-6383-2

Cited by 10 publications

(1 citation statement)

References 24 publications

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“…Relatively high concentrations of this solution cause throat swelling, suffocations and anemia [3]. In radioactive liquid waste, 60 Co and 54 Mn radionuclides are found as activation products derived from nuclear reactor materials [4,5]. It is reported that these radionuclides are still contained in the decontaminated water after the conventional decontamination processes [6,7].…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of radiocobalt and manganese from their binary aqueous solutions by batch adsorption process using PAN/HDTMA/KCuHCF composite

et al. 2020

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Simultaneous removal of radiocobalt and manganese by adsorption onto polyacrylonitrile/hexadecyltrimethylammonium bromide/potassium copper hexacyanoferrate (PAN/HDTMA/KCuHCF) composite was studied. The synthesized composite was characterized by Fourier-transformed infrared (FT-IR), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). The influence of the solution pH was studied in the range 1.5–7.8 and the results showed the effectiveness of the synthesized composite for simultaneous adsorption of radiocobalt and manganese in the pH range 2.5–6 at an adsorbent mass of 4 g/L. Adsorption kinetic data of manganese at the studied concentrations were best fitted by pseudo-second-order kinetic model and the diffusion study showed that the adsorption process was controlled by film diffusion. Thermodynamic parameters (ΔGo, ΔHo and ΔSo) were estimated and the results indicated that adsorption processes of the concerned (radio)toxicants were spontaneous and endothermic in nature. Of the studied isotherm models, Freundlich and Langmuir were the best ones for describing the adsorption isotherm data of radiocobalt and manganese, respectively. The adsorption capacity of PAN/HDTMA/KCuHCF was found to be 23.629 (for radiocobalt) and 62.854 (for manganese). Desorption of Radiocobalt and manganese loaded onto PAN/HDTMA/KCuHCF composite was studied using various desorbing agents at different concentrations.

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