Sorption and diffusion studies of radiocesium in soil samples from Ibu Kota Nusantara region of Indonesia

IF 9 Q1 ENVIRONMENTAL SCIENCES

Environmental Chemistry and Ecotoxicology Pub Date : 2025-01-01 DOI:10.1016/j.enceco.2024.12.008

Hana Fikrinabilah Dely Supratman , Hendra Adhi Pratama , Budi Setiawan , Mochamad Adhiraga Pratama , Sucipta Sucipta , Sitti Hijraini Nur , Nurul Efri Ekaningrum , Gustri Nurliati , Moh. Cecep Cepi Hikmat , Andry Setiawan , Niken Siwi Pamungkas , Zico Pratama Putra , Muhammad Yusuf

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引用次数: 0

Abstract

A plan by Indonesia to develop a Nuclear Power Plant (NPP) 1750 km from the new capital city, Ibu Kota Nusantara (IKN), has increased the need for radiocesium (radio-Cs) sorption and diffusion studies to reduce environmental concerns during reactor operation and decommissioning. This study provides the first comprehensive assessment of the physical, chemical, and mineral aspects of three soil samples (HA, M, and E) from the IKN region to figure out how these characteristics affect the mobilization of radio-Cs in the soil. To achieve this, radio-Cs apparent diffusion (

D_{a}

) and distribution (

K_{d}

) coefficients were determined for each soil sample. Mineralogical revealed distinct characteristics among the samples, with the E sample having the highest clay content of 46.18 %, followed by HA (36.27 %) and M (23.69 %). The

D_{a}

in groundwater (GW) solvent achieved at 12 × 10⁻¹² m²/s for HA, 5.80 × 10⁻¹² m²/s for M, and 9.91 × 10⁻¹² m²/s for E sample. In Deionized water (DW) solvent, the

D_{a}

obtained at 2.57 × 10⁻¹² m²/s for HA, 3.10 × 10⁻¹² m²/s for M, and 2.79 × 10⁻¹² m²/s for E sample. The lower diffusion rates (

D_{a}

) in DW compared to GW suggest reduced competition from other cations, limiting cesium ion interaction. The

K_{d}

values in GW were valued at 1949.82 mL/g, 1864.60 mL/g, and 3450.83 mL/g, for HA, M, and E samples, respectively. Meanwhile, the

K_{d}

values in DW increased up to 2262.73 mL/g, 2106.14 mL/g, and 3819.23 mL/g for HA, M, and E samples, respectively. The E sample offered the largest distribution coefficient (

K_{d}

) across all solvents, highlighting the significant impact of clay concentration on adsorption capacity. These findings highlight the significant impact of soil features in determining the behavior of radio-Cs, which has important implications for strategies related to environmental monitoring and remediation mitigation in IKN region.

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印度尼西亚伊布哥打努桑塔拉地区土壤样品中放射性铯的吸附和扩散研究

印度尼西亚计划在距新首都伊布哥打努桑塔拉（IKN） 1750公里的地方建设一座核电站（NPP），这增加了对放射性铯（放射性铯）吸附和扩散研究的需求，以减少反应堆运行和退役期间的环境问题。本研究首次对来自IKN地区的三种土壤样品（HA， M和E）的物理，化学和矿物方面进行了全面评估，以找出这些特征如何影响土壤中放射性- cs的动员。为此，测定了每个土壤样品的放射性-铯表观扩散系数（Da）和分布系数（Kd）。样品的矿物学特征明显，E样品粘土含量最高，为46.18%，HA次之，为36.27%，M次之，为23.69%。在地下水（GW）溶剂中，HA样品的Da为12 × 10−12 m2/s， M样品为5.80 × 10−12 m2/s， E样品为9.91 × 10−12 m2/s。在去离子水（DW）溶剂中，HA样品的Da为2.57 × 10−12 m2/s， M样品为3.10 × 10−12 m2/s， E样品为2.79 × 10−12 m2/s。与GW相比，DW中较低的扩散速率（Da）表明来自其他阳离子的竞争减少，限制了铯离子的相互作用。HA、M和E样品的GW Kd值分别为1949.82 mL/g、1864.60 mL/g和3450.83 mL/g。与此同时，HA、M和E样品的DW Kd值分别增加到2262.73 mL/g、2106.14 mL/g和3819.23 mL/g。E样品在所有溶剂中提供了最大的分布系数（Kd），突出了粘土浓度对吸附能力的显著影响。这些发现强调了土壤特征在决定放射性碳行为方面的重要影响，这对IKN地区的环境监测和补救缓解战略具有重要意义。

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来源期刊

Environmental Chemistry and Ecotoxicology

CiteScore

15.40

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0.00%

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