Evaluation of phosphorus adsorption capacity of various filter materials from aqueous solution
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Rapid urbanisation has significantly increased the impervious surface along with increase in pollutants such as nutrients (nitrogen, phosphorus), sediments, oil, and hydrocarbon in stormwater. Their removal is important as they adversely affect the aquatic ecosystem and the environment.Thus, this study evaluated the performance of various adsorbent materials (red gum mulch, pine mulch, flyash, oyster shell, sawdust, clay, sand, zeolite, dolomite, alum and lime sludges) for the removal of phosphorus from synthetic stormwater. Among them, alum and lime sludges appeared to be the most effective in removing phosphorus. Further analysis showed that alum and lime sludges remove 99 and 90% phosphorus within 60minutes from the synthetic stormwater. Therefore, this study demonstrates that the lime and alum sludges could be highly useful as a sustainable and cheap filter media for stormwater treatment systems that are enriched in phosphorus.
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Rigby, Hannah; Pritchard, Deborah; Collins, D.; Walton, K.; Penney, N. (2013)Alum sludge from wastewater treatment was applied at five rates on a phosphorus-deficient sand, and the effects on cereal growth and nutrition were investigated over 2 years. An inorganic fertilizer treatment, reapplied ...
Pritchard, Deborah; Penney, N.; McLaughlin, M.; Rigby, Hannah; Schwarz, Karen (2010)Australia is a large exporter of agricultural products, with producers responsible for a range of quality assurance programs to ensure that food crops are free from various contaminants of detriment to human health. Large ...
Rigby, H.; Pritchard, Deborah (2009)Effluent discharged from wastewater treatment plants to inland water bodies has the potential to cause eutrophication unless the phosphorus (P) concentration is reduced by methods such as dosing with alum (Al2(SO4)3), to ...