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Objective <p>A nuclear accident or incident releases many radionuclides. The most important fission produced radionuclides are cesium, strontium, iodine, and thallium. The emergency arises when it enters the body and gets deposited in the tissues and organs. Therefore, the present study was envisaged to evaluate the adsorption and removal efficacy of <i>Spirulina</i> for radionuclides, viz. cobalt, strontium, barium, cesium, and thallium.</p> Methods <p>The adsorption efficacy was investigated in terms of weight of <i>Spirulina</i> (0.1&#xa0;g), contact time (3&#xa0;h), metal ion concentration (10–100&#xa0;mg&#xa0;L<sup>−1</sup>), and simulated physiological fluids, viz. simulated gastric (SGF) and intestinal fluid (SIF). The removal efficacy of <i>Spirulina</i> was evaluated for strontium and thallium in mice. The strontium and thallium content in major tissues, urine, and faeces were estimated.</p> Results <p>The maximum binding capacity of <i>Spirulina</i> for cobalt, strontium, barium, cesium, and thallium was found to be 3.774, 0.655, 0.337, 1.328, and 0.129&#xa0;mg&#xa0;g<sup>−1</sup> in water, respectively, and 0.838, 0.575, 0.697, 0.334, and 6.098&#xa0;mg&#xa0;g<sup>−1</sup> in SGF, respectively, whereas in SIF it was found to be 18.182, 0.329, and 1.203&#xa0;mg&#xa0;g<sup>−1</sup> for strontium, cesium, and thallium, respectively.</p> Conclusion <p><i>Spirulina</i> significantly reduced the whole-body retention and increased excretion of these radionuclides, primarily strontium and thallium. The presence of various metal-binding functional groups such as –CO, –OH, –COOH, and –NH₂ may contribute to its ability to form complexes with cationic metals and prevent their systemic absorption. These findings suggest that <i>Spirulina</i> acts through adsorption and ion-exchange mechanisms and may serve as an effective biosorbent for reducing radionuclide burden following internal contamination.</p>

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Assessment of potential effects of Spirulina (Arthrospira platensis) as a bio-remedial agent against strontium and thallium contamination

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Mahendra Yadav,
  • Vivek Kumar,
  • Nidhi Sandal

摘要

Objective

A nuclear accident or incident releases many radionuclides. The most important fission produced radionuclides are cesium, strontium, iodine, and thallium. The emergency arises when it enters the body and gets deposited in the tissues and organs. Therefore, the present study was envisaged to evaluate the adsorption and removal efficacy of Spirulina for radionuclides, viz. cobalt, strontium, barium, cesium, and thallium.

Methods

The adsorption efficacy was investigated in terms of weight of Spirulina (0.1 g), contact time (3 h), metal ion concentration (10–100 mg L−1), and simulated physiological fluids, viz. simulated gastric (SGF) and intestinal fluid (SIF). The removal efficacy of Spirulina was evaluated for strontium and thallium in mice. The strontium and thallium content in major tissues, urine, and faeces were estimated.

Results

The maximum binding capacity of Spirulina for cobalt, strontium, barium, cesium, and thallium was found to be 3.774, 0.655, 0.337, 1.328, and 0.129 mg g−1 in water, respectively, and 0.838, 0.575, 0.697, 0.334, and 6.098 mg g−1 in SGF, respectively, whereas in SIF it was found to be 18.182, 0.329, and 1.203 mg g−1 for strontium, cesium, and thallium, respectively.

Conclusion

Spirulina significantly reduced the whole-body retention and increased excretion of these radionuclides, primarily strontium and thallium. The presence of various metal-binding functional groups such as –CO, –OH, –COOH, and –NH₂ may contribute to its ability to form complexes with cationic metals and prevent their systemic absorption. These findings suggest that Spirulina acts through adsorption and ion-exchange mechanisms and may serve as an effective biosorbent for reducing radionuclide burden following internal contamination.