Crystalline anhydrous citric acid c6h8o7

All chemicals were used in the experiments without further purification: indium acetate, (≥99%, Oxford, UK), crystalline anhydrous citric acid (C₆H₈O₇) (≥99.5%, Fisher Chemical, Loughborough, UK), HCl, NaOH, and deionized (DI) Mille-Q water (COD ≤5 ppb). Artrhospira platensis CNMN-CB-02 (A. platensis, spirulina), used as biosorbent, was obtained from the collection of non-pathogenic microorganisms (IMB TU, Chisinau, Moldova). The process of biomass growth is described in detail in the literature [29 (link)]. After cultivation for six days, the biomass was separated from the medium, dried, and homogenized for 10 min in a planetary ball mill (PULVERISETTE 6, Fritsch Laboratory Instruments GmbH, Idar-Oberstein, Germany) at 400 rpm.

All chemicals were used in the experiments without further purification: indium acetate, (≥99%, Oxford, UK), crystalline anhydrous citric acid (C₆H₈O₇) (≥99.5%, Fisher Chemical, Loughborough, UK), HCl, NaOH, and deionized (DI) Mille-Q water (COD ≤5 ppb). Artrhospira platensis CNMN-CB-02 (A. platensis, spirulina), used as biosorbent, was obtained from the collection of non-pathogenic microorganisms (IMB TU, Chisinau, Moldova). The process of biomass growth is described in detail in the literature [29 (link)]. After cultivation for six days, the biomass was separated from the medium, dried, and homogenized for 10 min in a planetary ball mill (PULVERISETTE 6, Fritsch Laboratory Instruments GmbH, Idar-Oberstein, Germany) at 400 rpm.