Figure 4

EDX mapping of the PACs based on activation solutions where (a) is RSS H2SO4, (b) is RSS KOH, (c) is RSS NaOH, (d) is RS H2SO4, (e) is RS KOH, and (f) is RS NaOH.

EDX mapping of the PACs based on activation solutions where (a) is RSS H2SO4, (b) is RSS KOH, (c) is RSS NaOH, (d) is RS H2SO4, (e) is RS KOH, and (f) is RS NaOH.