TITLE:
Distribution and Accumulation of Heavy Metals in Surface Sediment of Lake Junín National Reserve, Peru
AUTHORS:
María Custodio, Fisher Huaraca, Ciro Espinoza, Walter Cuadrado
KEYWORDS:
Lake Sediment, Sediment Quality, Contamination Factor, Load Index, Geoaccumulation Index
JOURNAL NAME:
Open Journal of Marine Science,
Vol.9 No.1,
January
25,
2019
ABSTRACT: The distribution and
accumulation of heavy metals in the surface sediment of Lake Junin National
Reserve was evaluated using the pollution factor (CF), pollution load index (PLI)
and geoaccumulation index (Igeo),
during 2018. Surface sediment samples were collected from 10 sampling sites,
with three repetitions, during the rainy and
dry seasons. The heavy metals determined were Fe, Cu, Cr, Cd, Pb and Zn; As,
was also determined. The results revealed the descending order of Fe > Cu > Zn > As > Pb > Cd > Cr concentrations recorded
in the three sampling sectors. The values of the CF obtained for the metals qualified as low CF, in times of rain and low water. The CF values of Cd were qualified
as moderate contamination factors at all sampling sites, except at LJ1 where it qualified as CF considerable.
The PLI for Lake Junin ranged from
0.0721 to 0.3260. The Igeo obtained indicated that the sampling sites are not contaminated by the heavy
metals under study. Therefore, the mean values for heavy metals and As did not
exceed the reference values and sediment quality guidelines. In general terms, CF, PLI and Igeo indicate that
there is no appreciable contamination by these metals in Lake Junin; except for
Cd.