Jan 15, 2018 · Table 4. ICP-OES analyses of treated AMD sample with clay (5× dilution). The results of the treated AMD with a bentonite clay mixing ( Table 4) show a considerable heavy metals removal of As, Co, Ni, Pb and Zn from 45.5, 39.7, 27.6, 35.2 and 31.7 to 4.1, 3.2, 6.6, 5.4 and 4.8 ppm, respectively.
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