Studies of the dC of pore water dissolved inorganic carbon (dC-DIC) were carried out in shallow water carbonate sediments of the Great Bahamas Bank (GBB) to further examine sediment–seagrass relationships and to more quantitatively describe the couplings between organic matter remineralization and sediment carbonate diagenesis. At all sites studied dC-DIC provided evidence for the dissolution o...

We report on a room temperature (RT) sodium-sulfur (Na−S) battery based sodium anode, sulfurated poly(acrylonitrile) (SPAN) cathode and an electrolyte containing tetrakis(hexafluoroisopropyloxy) borate (Na[B(hfip)4]; hfip=hexafluoroisopropoxide) in mixture of ethylene carbonate (EC), dimethyl (DMC) fluoroethylene (FEC). The hfip anion as weakly coordinating (WCA) provides high anodic stability,...

Increasing atmospheric carbon dioxide (CO2) through human activities and invasion of anthropogenic CO2 into the surface ocean alters the seawater carbonate chemistry, increasing CO2 and bicarbonate (HCO − 3 ) at the expense of carbonate ion (CO 3 ) concentrations. This redistribution in the dissolved inorganic carbon (DIC) pool decreases pH and carbonate saturation state (). Several components...

Soil lead (Pb) contamination in Pb paint-contaminated homes is a serious health risk urban areas. Phytoextraction green and sustainable technology for soil remediation, but its efficiency depends on the geochemical partitioning of soil. Following successful laboratory, greenhouse, panel experiments, field study was conducted to demonstrate effectiveness chemically catalyzed phytoextraction mode...

The cycling performance and SEI composition of Si nano-particle anodes in electrolytes containing 5–25 wt% fluoroethyelene carbonate (FEC) and 3–6 wt% vinylene carbonate (VC) has been investigated by a combination of by electrochemical cycling, electrochemical impedance spectroscopy, IR-ATR and XPS. The incorporation of FEC or VC changes the cycling performance, impedance, electrode morphology,...

Powders of sodium-carbonate co-substituted hydroxyapatite, having sodium content in the range of 0.25–1.5 wt.% with a 0.25 wt.% step, were prepared by a precipitation-solid state reaction route. Compacts of the powders were sintered in a CO2 flow (4 mL/min) at 1100 °C for 2 h. The sintered ceramics contained sodium and carbonate ions in the ranges of 0–1.5 wt.% and 1.3–6 wt.%, respectively, whi...

Carbonate anion exchange reactions with water in the uranyl-carbonate and calcium-uranyl-carbonate aqueous systems have been investigated using computational methods. Classical molecular dynamics (MD) simulations with the umbrella sampling technique were employed to determine potentials of mean force for the exchange reactions of water and carbonate. The presence of calcium counter-ions is pred...

In this study, the non-catalytic supercritical method has been studied in utilizing dimethyl carbonate. It was demonstrated that, the supercritical dimethyl carbonate process without any catalysts applied, converted triglycerides to fatty acid methyl esters with glycerol carbonate and citramalic acid as by-products, while free fatty acids were converted to fatty acid methyl esters with glyoxal....

introduction a large volume of sediments are dredged from water bodies such as ports, waterways and wetlands and deposited on land. sediments are typically polluted by contaminants such as heavy metals. metals in sediments are in soluble, carbonate bound, fe-mn oxide, sulfide/organic matter bound and residual fractions. the metal solubility and mobility are mainly controlled by organic matter c...

Pliocene and Pleistocene sediments from Sulu Sea ODP Sites 768 and 769 contain high-resolution records of pelagic sedimentation in a deep marine silled basin. Carbonate analyses reveal that both sites are free of pelagic carbonate up until 2.4 Ma, at which time carbonate becomes a major component of the pelagic marl sedimentation. The timing of this increase in calcium carbonate accumulation is...