The aim of study was to integrate chemical analyses and toxicity bioassays in order to assess the environmental risk connected with the presence of trace elements in the sediments. This study examined the ecological significance of trace elements in bottom sediments by applying a set of complementary sediment quality assessment methods sediment quality guidelines (SQGs) (mean probable effect co...

polycyclic aromatic hydrocarbons (pahs) in the priority controlling list of us epa weresystematically evaluated in surface sediments in dianchi lake and its estuaries. total pah concentrations(σpahs) varied from 210 to 11,070 ng/g dry weight (d.w.) in dianchi lake, and from 230 to 12,271 ng/g d.w.in the estuaries. σpahs in sediments from caohai section were higher than those from waihai section...

Toxicity-based sediment quality guidelines (SQGs) are often used to assess the potential of sediment contamination to adversely affect benthic macrofauna, yet the correspondence of these guidelines to benthic community condition is poorly documented. This study compares the performance of 5 toxicity-based SQG approaches to a new benthos-based SQG approach relative to changes in benthic communit...

Bakhtegan–TashkLakes (BTL) and Kamjan Marsh, one of the Ramsar sites with an area 1323 km 2 , have been shrunk due to groundwater overexploitation, construction two new dams drought. Evaporation BTL water significantly increased potentially toxic metal (PTMs) average total dissolved solids (TDS) from 45000 382000 mg/l. This study focuses on contamination sources 16 PTMs. The sampling include 24...

Abstract A greenhouse microcosm study investigated the impacts of recovered iron oxyhydroxide mine drainage residuals (MDRs) on phosphorus (P) and trace metal distributions at sediment layer/water column interface in Grand Lake o’ Cherokees, a large reservoir receiving waters impacted by both historic mining current agricultural land uses. Each mesocosm included 5 kg lake 20 L on-site groundwat...

polycyclic aromatic hydrocarbons (pahs) in the priority controlling list of us epa weresystematically evaluated in surface sediments in dianchi lake and its estuaries. total pah concentrations(σpahs) varied from 210 to 11,070 ng/g dry weight (d.w.) in dianchi lake, and from 230 to 12,271 ng/g d.w.in the estuaries. σpahs in sediments from caohai section were higher than those from waihai section...

In surficial sediments of Lake Piediluco, a small, riverine, regulated and heavily modified water body in the Central Italian Apennines, contamination by persistent organochlorine pollutants (POPs) was assessed. During spring autumn, six representative points were investigated. Reflecting substantial zonation pollution within this aquatic ecosystem, concentrations found to vary from site site. ...