Iron (Fe) oxyhydroxide colloids facilitate the transport of organic matter, oxyanions and trace metals in environment. This study was set up to compare sizes Fe-organic carbon (OC) formed by oxidation Fe(II) presence different concentrations Suwannee River Natural Organic Matter (NOM) evaluate how variable dissolved (DOC) Fe ratios impact binding phosphate. The molar DOC/Fe ratio test solutions...

The formation conditions, solubility and stability of monohydrocalcite (MHC, CaCO3·H2O), as well as sorption behaviors of toxic anions on MHC, are reviewed to evaluate MHC as a remediation material for hazardous oxyanions. MHC is a rare mineral in geological settings that occurs in recent sediments in saline lakes. Water temperature does not seem to be an important factor for MHC formation. The...

[1] Water column samples from the Mackenzie Shelf, the Beaufort Sea, and the Amundsen Gulf were obtained during 2003–2004 to investigate nutrient dynamics in an Arctic ecosystem influenced by a large river and flaw lead polynya. Nutrient inventories in the upper water column showed a significant seasonal drawdown of nitrate (NO3 ) and silicic acid (Si(OH)4) (1:1.75 mol/mol) and subsequent accum...

The mineral lulzacite from Saint-Aubin des Chateaux mine, France, with theoretical formula Sr(2)Fe(2+)(Fe(2+),Mg)(2)Al(4)(PO(4))(4)(OH)(10) has been studied using a combination of electron microscopy with EDX and vibrational spectroscopic techniques. Chemical analysis shows a Sr, Fe, Al phosphate with minor amounts of Ga, Ba and Mg. Raman spectroscopy identifies an intense band at 990cm(-1) wit...

The mineral ion homeostatic system maintains Ca, Mg, and P (because P does not exist as free P in biological systems, it will be referred to as phosphate and abbreviated PO4) distribution and levels in the extracellular fluid and intracellular compartments while simultaneously providing sufficient absorption and retention to meet skeletal mineral requirements. Homeostasis is achieved by the coo...

To reduce the environmental burden of agriculture, suitable methods to comprehend and assess the impact on natural resources are needed. One of the methods considered is the life cycle assessment (LCA) method, which was used to assess the environmental impacts of 18 grassland farms in three different farming intensities — intensive, extensified, and organic — in the Allgäu region in southern Ge...

Background: Guidelines for patients treated with conventional hemodialysis patients have been written for target serum levels for calcium (Ca), phosphate (PO4) and intact parathyroid hormone (iPTH). No guidelines exist for nocturnal home hemodialysis (NHHD) patients for target values or timing of the blood sample draw. We undertook a prospective cohort study to examine the variability in pre, p...