Seagrass beds are highly productive coastal ecosystems providing a large array of ecosystem services including fisheries and carbon sequestration. As seagrasses are known to be highly sensitive to anthropogenic forcing, we evaluated the use of trace metal concentrations in seagrasses as bioindicators for trace metal pollution of coastal regions at both global and local scale. We carried out a m...

In this study we investigated the effects of competing trace metals and Ca2+ on Cd(II), Pb(II), and Cu(II) complexation by humic acid extracted from groundwater in Orange County, California. Two types of titration experiments were conducted, those using a single metal and those in which the humic acid had been preequilibrated with a competing metal (either a trace metal or Ca2+). The labile met...

this 4x2 factorial study compared the effect of four sites (a=siphon as upstream, andb=shahdera, c=sunder and d= balloki as 3 downstream sites) during low and high flow seasons of river ravion metal cconcentrations in muscles from cirrhinus (c) mrigala, a bottom feeder carp. while weight andlength of studied specimens did not differ significantly (p>0.05). overall metal accumulations appeared i...

background: fruits especially citrus species are an integral part of human diet. contamination of foodstuffs by heavy and toxic metals via environmental pollution has become an inevitable challenge these days. therefore, the effect of pollutants on food safety for human consumption is a global public concern. in this regards, this study was conducted for al and cu health risk assessment through...

atomic number above 20. These properties are not the world. In India it is cultivated under 83.00 ha of relevant for biological effects, yet the heavy metals land with production of 7.9 lakh metric tonnes. Keeping enclose essential nutrients, beneficial elements and these points in view the present investigation has been elements which, at the present stage of knowledge, are made to study the e...

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...

San Diego Bay is an anthropogenically impacted waterway that is also a critical habitat for many sensitive species such as the green sea turtle (Chelonia mydas). In this study, we quantified trace metal concentrations in sediment and organisms composing the green sea turtle diet, and identified bioaccumulation patterns for a suite of trace metals. We found Ag, Cd, Cu, Mn, Se, and Zn exhibited t...

Marine microalgae (Emiliania huxleyi) were grown in seawater enriched only with nitrogen and phosphorus, without control of free metal concentrations using synthetic chelators. Complexing ligands and thiol compounds were determined by cathodic stripping volt-ammetry. Copper was added to these cultures, and ligands were produced in response to the copper addition. Parallel measurements of thiols...

Trace element profile analysis detects and quantifies the presence of several metals simultaneously at low concentrations in the body. In occupational medicine, it may be used to monitor exposure or to evaluate suspected toxicity. Clinical interpretation is often difficult because, with the exception of lead and possibly cadmium, there is little firm information on toxicity thresholds. For thes...

Fugitive dust from 18 unsurfaced roadways in Missouri were sampled using a novel cyclonic fugitive dust collector that was designed to obtain suspended bulk samples for analysis. The samples were analyzed for trace metals, Fe and Al, particle sizes, and mineralogy to characterize the similarities and differences between roadways. Thirteen roads were located in the Viburnum Trend (VT) mining dis...