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This study investigated adsorption of fulvic acid (FA) by single-walled (SWCNT) and multi-walled carbon nanotubes (MWCNT) and activated carbon. Adsorption of FA depends greatly on the adsorbent surface area and solution pH. SWCNT has higher adsorption than MWCNT and activated carbon. Lower E4/E6 (absorbance at 465nm to that at 665nm) and higher E2/E3 (absorbance at 250nm to that at 365nm) ratios of...
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