JEQ -- Li et al. 31 (4): 1106 Figure IG1

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Fig. 1. Sorption of (a) Cs⁺, (b) Sr²⁺, (c) La³⁺, (d) Zn²⁺, and (e) Pb²⁺ on raw zeolite ( ${diamondsuit}$ ), hexadecyltrimethylammonium (HDTMA)-treated zeolite to 25 ( ${blacksquare}$ ), 50 ( ${blacktriangleup}$ ), 75 (•), 100 ( ${diamond}$ ), 150 ( ${square}$ ), and 200 ( ${Delta}$ )% surface coverage. The lines are Langmuir fits to the experimental data.