Iranian Association of Environmental Health (IAEH)
Abstract
The contamination of surface waters through human activities has been
intensified over the past years as population density has increased.
Nickel is a metallic element and fuel combustion, nickel mining,
refining waste, sewage sludge, and incineration are the major sources
of nickel propagation. Nickel from various industrial wastewaters and
other sources finally are disposed into water bodies. In this work,
Karaj river was considered from 50º to 50º 14´longitudes
and 35º 45´ to 35º 58´ latitudes and the presence
of nickel was also assessed in this area. Sixteen stations were
randomly selected and sediment samples were collected in polyethylene
containers. Some water quality parameters such as pH, temperature,
dissolved oxygen, electrical conductivity, were determind by direct
on-site measurements. To measure COD, 16 water samples were collected
in dark bottles and transferred to laboratory spatial parameters such
as slope and distance from start point were also calculated by ARCGIS
9.2. The relation between Ni concentration with spatial parameters and
water quality parameters were obtained by multivariate analysis.
Results showed that there was a significant relation between Ni
concentration in sediments and distance from start point and electrical
conductivity