An iron-based mixed-polyanion compound, Li9Fe3(P2O7)3(PO4)2, is introduced as a possible cathode material for Li-ion batteries. Phase-pure Li9Fe3(P2O7)3(PO4)2 is successfully prepared by a sol-gel method, and its physicochemical properties are investigated in detail. Special attention is paid on making clear the variation of the phase composition with the annealing temperature and the effect of...

Energy production in constructed wetlands is a little-known field, as the operation of vertical partially saturated (VPS-CWs) that promote both aerobic and anaerobic microbial interactions. By doing so, bacterial degradation increased, becoming main mechanism pollutant removal (CWs). For first time, generation bioelectricity, together with ornamental plants during treatment domestic wastewater,...

Nutrients especially nitrate and phosphate are the main limiting factors of algal growth in aquatic ecosystems. The present study was conducted to examine the effects of different concentrations of nitrate and phosphate simultaneously on growth of macro algae, Ulva rigida. For this purpose, algae were fed various concentrations of nitrate and phosphate during 28 days in 300 L tanks in the form ...

BACKGROUND The substitution of Ca(2+) in Ca-hydroxylapatite by toxic Cd(2+) can cause the forming of Cd-hydroxylapatite and is a significant issue in a great variety of research areas, which hence needs an understanding of the essential physicochemical characteristics. Unfortunately, the solubility product and thermodynamic data for Cd-hydroxylapatite in water under a variety of conditions now ...

Abstract The Baltic Sea is the youngest sea on our planet, environment of considered to be unique and fragile. It affected by various human activities resulting in impairment water quality. Riverine nutrient (nitrogen phosphorus) loads are among major causes eutrophication Sea. This study examines temporal trends discharge, total phosphorus (TP) orthophosphate-phosphorus (PO4-P) concentrations ...

Nanomaterials are extensively studied in electrochemical energy storage and conversion systems because of their structural advantages. However, their volumetric energy density still needs improvement due to the high surface area, especially the carbon based nanocomposites. Constructing hierarchical micro-scaled materials from closely stacked subunits is proposed as an effective way to solve the...

The objective of this study was to determine if the volume of sample used for analysis of soluble reactive phosphate (SRP) could be reduced from 100 mL (as per a widely used standardized procedure) to 50 or 10 mL to reduce the amount of hazardous waste generated from routine analysis of SRP in water samples from rivers, streams, and ponds in an urbanized landscape, in accordance with the princi...

Studies of phosphorus (P) dynamics in surface sediments of lakes and coastal seas typically emphasize the role of coupled iron (Fe), sulfur (S) and P cycling for sediment P burial and release. Here, we show that anaerobic oxidation of methane (AOM) also may impact sediment P cycling in such systems. Using porewater and sediment profiles for sites in an oligotrophic coastal basin (Bothnian Sea),...

Open-framework zinc phosphates with one-dimensional ladder structures are shown to transform, under simple reaction conditions, to twoand three-dimensional structures. Thus, the one-dimensional ladder, [C6N4H22]0.5[Zn(HPO4)2], I, on heating with piperazine in aqueous solution gives a layer phosphate, [C4N2H12][Zn2(PO4)2], III, and the three-dimensional phosphates [C2N2H10]0.5[Zn(PO4)], IV, [C6N...

There are many biological contexts in which DNA damage generates "dirty" breaks with 3'-PO4 (or cyclic-PO4) and 5'-OH ends that cannot be sealed by DNA ligases. Here we show that the Escherichia coli RNA ligase RtcB can splice these dirty DNA ends via a unique chemical mechanism. RtcB transfers GMP from a covalent RtcB-GMP intermediate to a DNA 3'-PO4 to form a "capped" 3' end structure, DNA3'p...