1.

In zeolite process, only small amount of ________ ions can be removed.

A. Mn<sup>++</sup>
B. Fe<sup>++</sup>
C. Both Fe<sup>++</sup> and Mn<sup>++</sup>
D. Neither Fe<sup>++</sup> nor Mn<sup>++</sup>
Answer» D. Neither Fe<sup>++</sup> nor Mn<sup>++</sup>


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