Topic
Phosphorus
About: Phosphorus is a research topic. Over the lifetime, 53120 publications have been published within this topic receiving 939731 citations. The topic is also known as: element 15 & P.
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TL;DR: The measurement of the ratios of anaerobic phosphorus release to acetate uptake and glycogen degradation to acetates uptake is suggested as an assay to estimate the relative dominance of PAM and GAM, respectively, in EBPR cultures.
Abstract: Enhanced biological phosphorus removal (EBPR) in waste-water treatment involves at least two types of bacterial metabolism: a polyphosphate-accumulating metabolism (PAM) and a glycogen-accumulating metabolism (GAM). Laboratory-scale sequencing batch reactors operated in an anaerobic-aerobic cycle confirmed that low influent phosphorus/chemical oxygen demand (COD) ratio feed favored a GAM-dominated culture and high influent phosphorus/COD ratio feed favored a PAM-dominated culture, as indicated by changes in phosphorus, acetate, glycogen, and polyhydroxyalkanoate (PHA) concentrations during the anaerobic phase. Differential PAM and GAM dominance may explain variance in anaerobic phosphorus release, glycogen degradation, and PHA synthesis per acetate uptake ratios previously reported in EBPR systems and proposed metabolic models. The measurement of the ratios of anaerobic phosphorus release to acetate uptake and glycogen degradation to acetate uptake is suggested as an assay to estimate the relative dominance of PAM and GAM, respectively, in EBPR cultures.
156 citations
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TL;DR: In this paper, the effect of two organic amendments on soil moisture and nutrients was evaluated in an experimental maize field in northern Colorado, where they tilled in conventional steer manure and fast-pyrolysis pine-wood biochar (30 Mg/ha−1) and quantified impacts on gravimetric soil moisture, total carbon and nitrogen, mineral nitrogen, available phosphorus, microbial biomass, and seven extracellular enzymatic activities.
156 citations
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TL;DR: Many physical, chemical, and biological processes in freshwater ecosystems mobilize the nutrient phosphorus (P) from sediments, which in turn may contribute to the formation of harmful algal blooms as mentioned in this paper.
Abstract: Many physical, chemical, and biological processes in freshwater ecosystems mobilize the nutrient phosphorus (P) from sediments, which in turn may contribute to the formation of harmful algal blooms...
155 citations
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TL;DR: This review focuses on recent research on the use of biochar for the adsorption of inorganic nitrogen (ammonium and nitrate) and phosphorus (phosphate) from water, especially for the main influence factors and mechanisms for nitrogen and phosphorus adsorbent on biochar.
Abstract: Biochar is the solid product of biomass pyrolysis that can be used for carbon sequestration, soil amendment, and pollution remediation. The use of biochar as an adsorbent for the removal of water contaminants has elicited increasing interest due to the multifunctional properties of this material. The application of biochar in the adsorption of inorganic nutrients from eutrophic water has not been reviewed. This review focuses on recent research on the use of biochar for the adsorption of inorganic nitrogen (ammonium and nitrate) and phosphorus (phosphate) from water, especially for the main influence factors and mechanisms for nitrogen and phosphorus adsorption on biochar.
155 citations
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TL;DR: Investigation of nitrogen and phosphorus nutrition in a lowland wet sedge meadow and an upland birch–willow–heath community indicates that nitrogen supply limits production in both soils.
Abstract: Nitrogen and phosphorus nutrition were investigated as limiting factors to primary production in a lowland wet sedge meadow and an upland birch–willow–heath community.Response to nitrogen fertiliza...
155 citations