Bioavailability of metals in soils irrigated by synthetic wastewater

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dc.contributor.author Korfali, S.I.
dc.contributor.author Karaki, H.
dc.date.accessioned 2018-08-01T08:03:52Z
dc.date.available 2018-08-01T08:03:52Z
dc.date.copyright 2017 en_US
dc.identifier.issn 1792-085X en_US
dc.identifier.uri http://hdl.handle.net/10725/8254
dc.description.abstract In Lebanon, Bekaa valley is an agricultural zone; during the dry season, water is withdrawn from Litani River for irrigation which is mostly domestic and industrial waste water. Metal mobility, bioavailability, or potential risks can be anticipated by metal speciation in soil and water. The objective of this study was to investigate the speciation of metals in soil and water of upper Litani basin. Soils samples were subjected to a modified BCR sequential extraction technique that operationally extracts metals as acid soluble, reducible, oxidizing, and residual fraction. Metal content in each fraction and total metal in water were determined by AAS and ICP-MS techniques. Sediment pH, Eh and TOC and macro water parameter were determined. Speciation of metals in water was predicted PHREEQC geochemical computer model. Results indicated in non-residual fraction respectively highest average % of total metal are in reducible and acid soluble (Mn: 27 %, 18; Zn: 18 %; Cr: 27%, 34%; As: 28% , 20%); in oxidizing and acid soluble (Cu: 25%, 10%; Ni: 24%, 33%; Cd: 16%, 23%, Hg: 23;%, 12%). Metal speciation variations among sites were related to the levels of TOC and Eh and water BOD. The ICF values indicate a considerable contamination for As, Cd, Cr, Ni; and GCF indicated 50 % of sites of considerable contamination. Speciation in water predicted existence of the toxic free aqua ion (Mn: 6-97%; Zn: 35-89%; Ni: 60-90%; Cd: 35-82%). These and soil GCF values reflect the high degree of metal bioavailability, toxicity, and potential risk. en_US
dc.language.iso en en_US
dc.title Bioavailability of metals in soils irrigated by synthetic wastewater en_US
dc.type Article en_US
dc.description.version Published en_US
dc.title.subtitle metal speciation en_US
dc.author.school SAS en_US
dc.author.idnumber 197829160 en_US
dc.author.department Natural Sciences en_US
dc.description.embargo N/A en_US
dc.relation.journal European Water en_US
dc.journal.volume 58 en_US
dc.article.pages 315-322 en_US
dc.keywords Wastewater en_US
dc.keywords Soil en_US
dc.keywords Metal speciation, en_US
dc.identifier.ctation Korfali, S. I., & Karaki, H. (2017). Bioavailability of metals in soils irrigated by synthetic wastewater: Metal speciation. en_US
dc.author.email skorfali@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://www.ewra.net/ew/pdf/EW_2017_58_47.pdf en_US
dc.orcid.id https://orcid.org/0000-0002-2038-510X en_US
dc.author.affiliation Lebanese American University en_US

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