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Caption : figure s1. uv-vis. absorption spectra representing the cr (vi) removal by lafeo3@c-700 when repeated the experiment under same conditions showing reproducibility.

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Caption : figure s2. comparison of cr (vi) adsorption efficiency of lfo@c-700	 with recently reported materials.

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Caption : figure s3.  (a) recyclability study of lfo@c-700 for cr (vi) adsorption, (b) chemical stability, and (c) environmental application of lfo@c-700.