| http://www.w3.org/ns/prov#value | - Similarly, there is a considerable difference between the initial and final concentrations of K+ in biotite treated with citric acid (125???ppm), while it is least in biotite treated with distilled water (3???ppm).Table 4: Leachable ionic concentrations of treated highly weathered biotite: after one month and six months.In contrast to the v
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