Spectroscopic and Microscopic Characterization of Volcanic Ash from Puyehue-(Chile) Eruption: Preliminary Approach for the Application in the Arsenic Removal

Table 3

REE trace elements (expressed as ppm) by ICP MS.

Sample	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu
PM	29	65.7	9	40	8.13	2	8	1	8	1.71	5.35	0.82	5.4	0.87
PT	31	69.6	9	37	8.57	2	8	1	8	1.86	5.45	0.88	5.8	0.92
ST	20	45.5	6	26	6.51	2	6	1	6	1.35	3.98	0.60	3.8	0.59

PM: volcanic pyroclastic mixture; ST: scoria type; PT: pumiceous type.