title: Assessment of extractants for the determination of thallium in an accidentally polluted soil.
abstract: Thallium is a rare and easily dispersed element with high toxicity to organisms. Relatively high levels of thallium (approximately 9.58 mg kg(-1)) had been found in aqua regia soil extract of an accidentally polluted soil from south of Spain. To assess the available and leachable portions of thallium in the polluted soil, single and sequential extraction procedures have been utilized. Further, X-ray diffraction and scanning electron microscopic studies have also been used to find out the mineral phases. The amount of thallium extracted by the extracting agents in comparison to aqua regia, as well as the different phase associations are discussed.
authors.affiliation: Geological Survey of India, Hyderabad 500068, India.
authors.forename: Chebrolu Rama Mohan
authors.initials: CR
authors.lastname: Rao
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Ruiz-Chancho
authors.forename: Angels
authors.initials: A
authors.lastname: Sahuquillo
authors.forename: José Fermín
authors.initials: JF
authors.lastname: López-Sánchez
mesh_terms: D013058:Mass Spectrometry; D008855:Microscopy, Electron, Scanning; D009566:Nitrates / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D012996:Solutions; D012997:Solvents; D013030:Spain; D013793:Thallium / Q000032:analysis* / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D009566:Nitrates; D012989:Soil Pollutants; D012996:Solutions; D012997:Solvents; D013793:Thallium; C006568:ammonium nitrate