concentrations of elements (as, co, cu, ni, mo, pb, v, cd, cr and zn) are studied in the surface sediments of bakhtegan lake, northwest of nyriz city, iran, to assess metal contamination. the average abundance order of trace elements content in bakhtegan lake sediments is cr>ni> v> zn> cu> co> as> pb> mo>cd. the comparison of trace elements concentration in bakhtegan lake sediments with toxicol...

Cohesion is the main inter-controlled factor for stability of fine-grained sediments in debris flow, and plays an important role flow hazard early warning. At present, there no cohesion rapid remote sensing detection model, which seriously affects development quantitative evaluation on stability. How to use quickly detect has become scientific issue. Therefore, strengthening research hyperspect...

[1] To investigate arsenic mobility in the Bengal Basin groundwater, we sampled water wells and sediments throughout the region. There are strong correlations among high levels of dissolved arsenic and iron, ammonia, and methane, especially in samples from a single site (Laxmipur). No linkage is seen between As and agricultural tracers such as phosphate. The association of As and Fe occurs beca...

In this study, 166 surface sediments and 3 sediment cores from the Bohai Sea (BS), Yellow Sea (YS) and East China Sea (ECS) in China were collected to investigate the spatial and temporal distributions and the transport of PFASs. PFASs concentrations in the surface sediments ranged from below detection limit (<LOD) to 2.78 ng g(-1) with an average value of 0.55 ng g(-1) on a dry weight basis (d...

Disturbance strongly impacts patterns of community diversity, yet the shape of the diversity-disturbance relationship remains a matter of debate. The topic has been of interest in theoretical ecology for decades as it has practical implications for the understanding of ecosystem services in nature. One of these processes is the remineralization of organic matter by microorganisms in coastal mar...

Organisms pIayed major roles as producers and modifiers of sediments in many Silurian marine env~ronments. Pelrnarozoan skeietal debris famed extensive shoals and banks in many high-enerw, tropical environments : algae. bvozoans. tabulate corals. and strematoporoids were the major skeieral contributors to reeial buridups common in mid and late SiIunan subtropical shelves. ArtlcuIare brachiopods...