Eco-friendly natural mineral biotite as a cesium adsorbent: Utilizing low-concentration acid and hydrogen peroxide

• DOI: 10.1016/j.chemosphere.2024.141510
• Publication Date: 2024-02-23T05:03:26Z
• Authors: Sunki Kwon; Donghoon Seoung; Eunji Jung; Jiyoung Park; Jongmyoung Lim; Byungkyu Park; Youngjin Cho; Pyosang Kim; Hyeonsu Kim; Yongmoon Lee

Biotite, a phyllosilicate mineral, possesses significant potential for cesium (Cs) adsorption owing to its negative surface charge, specific area (SSA), and frayed edge sites (FES). Notably, FES are known play an important role in the of Cs. The objectives this study were investigate Cs capacity behavior artificially weathered biotite identify mineralogical characteristics development eco-friendly geologically-based adsorbent. Through various analyses, it was confirmed that mainly formed by mineral structural distortion during artificial weathering. is improved approximately 39% (from 20.53 28.63 mg g−1) when through weathering using low-concentration acidic solution mixed with hydrogen peroxide (H2O2). Especially, selectivity Cs-containing seawater, including high concentrations cations organic matter, significantly enhanced from 203.2 1707.6 mL g−1, increase removal efficiency 49.5 89.2%. These results indicate essential adsorption. Therefore, simple economical method, which uses H2O2, can be applied natural minerals use as adsorbents.