This study concerns the distribution and potential sources of elevated heavy metal concentrations (Cu, Zn, Pb, Cd, As) in surface sediments of the Dongzhai Harbor, Hainan Island,a national important mangrove ecosystem protection area.It was found that the pollution of As may occur occasional biological effect by numerical Sediment Quality Guidelines. Further, Geoaccumulation indices (Igeo) sugg...

The magnitude and ecological relevance of metal pollution from the upstream of water sources after emergency pollution events was investigated by applying a set of complementary sediment quality assessment methods: (1) geochemical assessment based on background value (the geoaccumulation index); (2) comparisons with sediment quality guidelines (SQGs); (3) an evaluation of the combined pollution...

Abstract This study aimed to reveal the characteristics of nutrients and heavy metals associated with ecological risks in sediments Fenhe River, Taiyuan section. The concentrations (total nitrogen, total phosphorus, organic matter) (As, Cu, Zn, Pb, Cr, Ni, Hg, Cd) were investigated. Spatial distribution, correlation analysis source identification facilitated indicate nutrient metal pollution ch...

With the swift advancement of geometric modeling industry and computer technology, traditional generalized Ball curves surfaces are challenging to achieve various complex surfaces. Constructing an interpolation curve for given discrete data points optimizing its shape have important research value in engineering applications. This article uses improved golden eagle optimizer design shape-adjust...

The current paper determines heavy metals in sediments of six freshwater wetlands of greater Dhaka district from November 1999 to September 2000. The sampling took place in summer, rainy season, and winter, wherein for each season five soil samples were collected from the wetland at a depth of 0 – 15 cm. To assess the status of heavy metal pollution in the sediments, geo-accumulation factor (Ig...

The current paper determines heavy metals in sediments of six freshwater wetlands of greater Dhaka district from November 1999 to September 2000. The sampling took place in summer, rainy season, and winter, wherein for each season five soil samples were collected from the wetland at a depth of 0 – 15 cm. To assess the status of heavy metal pollution in the sediments, geo-accumulation factor (Ig...

1 Department of Meteorology, University of Reading, Reading, UK, 2 Geophysis and Meteorology, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, Madrid, Spain, 3 Laboratoire d’Océanographie et du Climat: Expérimentations et Approches Numériques Laboratory, Sorbonne Universités (UPMC, Université Paris IV)-Centre National de la Recherche Scientifique-IRD-MNHN, Paris, France, 4 Insti...

Water and sediment samples were collected from six different stations, located along the Nil River between February and June 2015. Concentrations of cadmium, lead, zinc, and copper were determined. The extent of the sediment pollution was assessed, using the multiple pollution indices, namely contamination factor (CF), pollution load index (PLI), and the geoaccumulation index (Igeo). The result...

Oil spillage is one of the common pollution events global water-soil ecosystems. A comprehensive investigation on heavy metals surface water and sediments was conducted after oil spill incident in Sela River its tributaries Sundarbans mangrove forest ecosystems, Bangladesh. Water sediment samples were collected from preselected sampling points River, elemental (Pb, Cd, Cr, Co, Cu, Ni, Fe, As, H...