Functionalized Attapulgite for the Adsorption of Methylene Blue: Synthesis, Characterization, and Adsorption Mechanism.

As shown in Table 1 , the S BET of the APT samples shows a decreasing trend [130.45 m 2 /g for UAPT; 97.08 m 2 /g for SA(0.01)-APT; 89.77 m 2 /g for SA(0.05)-APT; and 51.15 m 2 /g for SA(0.2)-APT] as the SA concentration increases but shows a rise (178.24 m 2 /g) for hydrothermally treated APT (marked as HAPT).

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