Phosphorus adsorption on water treatment residual solids

Research Article| February 01 2009 Phosphorus adsorption on water treatment residual solids Meaghan K. Gibbons; Meaghan K. Gibbons 1Department of Civil and Resource Engineering, Dalhousie University, Halifax, Nova Scotia, B3J 1X1, Canada Search for other works by this author on: This Site PubMed Google Scholar Md. Maruf Mortula; Md. Maruf Mortula 2Department of Civil Engineering, American University of Sharjah, Sharjah, PO Box, 26666, UAE Search for other works by this author on: This Site PubMed Google Scholar Graham A. Gagnon Graham A. Gagnon 1Department of Civil and Resource Engineering, Dalhousie University, Halifax, Nova Scotia, B3J 1X1, Canada Tel.: +1 902 494 3268 Fax: +1 902 494 3108; E-mail: graham.gagnon@dal.ca Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2009) 58 (1): 1–10. https://doi.org/10.2166/aqua.2009.017 Article history Received: February 20 2008 Accepted: April 27 2008 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Meaghan K. Gibbons, Md. Maruf Mortula, Graham A. Gagnon; Phosphorus adsorption on water treatment residual solids. Journal of Water Supply: Research and Technology-Aqua 1 February 2009; 58 (1): 1–10. doi: https://doi.org/10.2166/aqua.2009.017 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The treatment and disposal of water treatment plant residual solids has become an increasingly important environmental priority for drinking water utilities. This study examines water treatment residual solids (WTRSs) from four North American water treatment plants to determine the role that coagulant types play in phosphate adsorption by the residual solids. In total, two alum residual solids (one solid from a plant that has a raw water with low alkalinity and one solid from a plant that has a raw water with high alkalinity), one lime residual solid and one ferric residual solid were used in batch adsorption experiments with deionized water at a pH of 6.2±0.2 and secondary municipal wastewater effluent at a pH of 6.8. Langmuir isotherm modeling showed that ferric residuals had the highest adsorptive capacity for phosphate (Qmax=2,960 mg/kg), followed by lime (Qmax=1,390 mg/kg) and alum (Qmax=1,110 mg/kg and 1,030 mg/kg) for adsorption experiments with P-spiked deionized water. Of the two alum residuals, the residual with a higher weight percent of metal oxides had a higher adsorptive capacity. The ferric residuals were less affected by competing species in the wastewater effluent, while the lime and alum residuals had a higher rate of phosphate removal from the deionized water compared to the wastewater effluent. Overall, ferric water treatment residuals were the best adsorbent for phosphate adsorption, followed by lime and alum residuals. adsorption, alum sludge, Langmuir isotherm, phosphorus treatment, water treatment residual solids This content is only available as a PDF.