Potential for nonenzymatic reduction of Fe(III) via electron shuttling in subsurface sediments

Article Abstract:

Researchers from the University of Massachusetts evaluated the potential of extracellular quinones and other humic substances, but not uranium or sulfur, to serve as electron shuttles between Fe (III)-reducing microorganisms and insoluble Fe(III) oxides in aquifer sediments. Test organisms used to perform the experiment were Geobacter metallireducens and Geobacter sulfurreducens.

United States, Science & research, Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Iron & Other Tonics, Quinone, Quinones, University of Massachusetts

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Laboratory development of permeable reactive mixtures for the removal of phosphorus from onsite wastewater disposal systems

Article Abstract:

Several reactive mixtures such as silica sand, high calcium crushed limestone, fine-grained aluminum oxide and iron and calcium oxides produced from steel manufacturing proved effective in the removal of phosphorus from onsite wastewater disposal systems. Iron and calcium oxides and the fine-grained aluminum oxide removed greater than 99% of PO4 from a 10 mg/L PO4-P solutions at representative groundwater flow rates. A reactive mixture of 50 wt% silica sand, 45 wt% limestone and 5 wt% iron/calcium oxide demonstrated an ability to remove >90% reduction in PO4 over a period of 4 years.

Water Supply and Irrigation Systems, All Other Basic Inorganic Chemical Manufacturing, Water supply, Water Treatment, Industrial inorganic chemicals, not elsewhere classified, Phosphorus & Compounds, Environmental aspects, Water treatment plants, Metallic oxides, Metal oxides, Phosphorus, Phosphorus (Chemical element)

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