The last result is the concentration of Fe(III) released from materials. the bar graph shows the concentration of Fe(III) release after adsorption from composite beads or MIL-53(Fe) powders. After the decrease, the value of pH, Fe(III) released was increased for MIL-53(Fe) powder due to solubility. On the other hand, the value of Fe(III) released in chitosan beads were not significant difference in pH 4 and 7
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