one of the most important methods to investigate heavy metals as pollutants is more likely to use bio-monitors which can be applied as an appropriate index to express the quality of environment. in current study, in order to investigate the effects of dominant plants in the desired region and role of aquatic macrophytes in monitoring such elements as zinc (zn), lead (pb), copper (cu) and cadmiu...

We measured IRD fluxes from 22-5 ka BP in two sediment cores from the Scotia Sea using two different methods. The first, commonly used method, uses the linear sedimentation rate (LSR), dry bulk density, and weight percent of IRD in the sample. The second uses 230Th normalization, which has been proposed as an improved way to determine sediment fluxes in sites with significant lateral redistribu...

This study evaluated the distribution of polychlorinated biphenyls (PCBs) in 39 surface sediment samples and four cores collected in Toulon Bay, a semiclosed area submitted to various anthropogenic inputs. The concentration of PCBs in the superficial sediment samples ranged from 1.7 to 2530 ng g(-1) dry weight. The spatial distribution of these compounds suggested that the high concentrations o...

This work presents a piece of initial information about the estimation sedimentation rate for Lake Pykara. In this investigation, chronological sequence sediment core was set up dependent on 137Cs and 210Pbex analysis to study accumulation rates in Caesium-137 (Cs) is an artificial radionuclide regularly utilized building chronology lake sediments Anthropocene period. The unsupported 210Pb prof...

introduction we can obtain useful information about aquatic systems by studying heavy metals in surface sediments. marine sediments can bring out the aquatic contamination. due to heavy metal toxicity, hard biodegradation and easy bioaccumulation in aquatic ecosystems, various indices have been developed such as sediment quality guidelines (sqgs), enrichment factor (ef), pollution load index (i...

This paper reports the metals content in water, sediment, macroalgae, aquatic plant, and fish of Batang Ai Hydroelectric Reservoir in Sarawak, Malaysia. The samples were acid digested and subjected to atomic absorption spectrometry analysis for Na, K, Mn, Cr, Ni, Zn, Mg, Fe, Sn, Al, Ca, As, Se, and Hg. The total Hg content was analysed on the mercury analyser. Results showed that metals in wate...

Background: The pollution of the aquatic environment with heavy metals has become a worldwide problem during recent years, due to their potential toxic effects and ability to bio-accumulate in aquatic ecosystems. Heavy metals are sensitive indicators for monitoring changes in the aquatic environment. Methods: In this study, total concentrations of Cr, Pb, Cu, Zn, and Fe were measured in water...