Fig. 4. Effect of hydroxyapatite (HA) amendment on soluble (A) As and (B) Cr concentration for two sediments equilibrated in 0.02 M KCl or 0.01 M CaCl2. Bars represent the standard deviation of the treatment means.
Fig. 4. Effect of hydroxyapatite (HA) amendment on soluble (A) As and (B) Cr concentration for two sediments equilibrated in 0.02 M KCl or 0.01 M CaCl2. Bars represent the standard deviation of the treatment means.