Thallium pollution and poisoning have been found in mining districts of thalliuni deposits as a result of introduction of thallium into surface waters, soils, plants and human body owing to weathering and leaching of ...Thallium pollution and poisoning have been found in mining districts of thalliuni deposits as a result of introduction of thallium into surface waters, soils, plants and human body owing to weathering and leaching of TI-rich ores and rocks left in the open air. Waters in these mining districts are divided into four types according to their T1 contents and concentration of less than 1×10-9 is proposed as thallium standard for drinking water.展开更多
This paper deals with thallium in typical low-temperature deopits of Au, Tl, As,Sb and Hg in South China with respect to its mode of occurrence, minerals and geochemicalcorrelations with many other coexisting major an...This paper deals with thallium in typical low-temperature deopits of Au, Tl, As,Sb and Hg in South China with respect to its mode of occurrence, minerals and geochemicalcorrelations with many other coexisting major and trace elements. Criteria are proposed for i-dentifying independent thallium deposits and thallium-bearing deposits and the Nanhua realgardeposit is classified for the first time as an independent thallium deposit. Tl, F, Cl, I and B aresuggested as indicators for low-temperature mineralization with examples furnished for their ap-plications.展开更多
The cyclic voltammetry(CV) and the square wave technique were used for the investigations of thallium(Ⅰ) underpotential deposition(UPD) on the silver electrode. A solution of 10 \{mmol/L\} HClO 4+10 mmol/L NaCl was s...The cyclic voltammetry(CV) and the square wave technique were used for the investigations of thallium(Ⅰ) underpotential deposition(UPD) on the silver electrode. A solution of 10 \{mmol/L\} HClO 4+10 mmol/L NaCl was selected as the supporting electrolyte. The calibration plots for Tl(Ⅰ) concentration in the range of 2×10 -9 -1×10 -7 mol/L were obtained. The detection limit was 5×10 -10 mol/L. For the solutions of 4 0×10 -9 mol/L thallium added before the urine sample pretreatment procedure, the average recovery was 105 6% with a relative standard deviation(RSD) of 15 5%.展开更多
文摘Thallium pollution and poisoning have been found in mining districts of thalliuni deposits as a result of introduction of thallium into surface waters, soils, plants and human body owing to weathering and leaching of TI-rich ores and rocks left in the open air. Waters in these mining districts are divided into four types according to their T1 contents and concentration of less than 1×10-9 is proposed as thallium standard for drinking water.
文摘This paper deals with thallium in typical low-temperature deopits of Au, Tl, As,Sb and Hg in South China with respect to its mode of occurrence, minerals and geochemicalcorrelations with many other coexisting major and trace elements. Criteria are proposed for i-dentifying independent thallium deposits and thallium-bearing deposits and the Nanhua realgardeposit is classified for the first time as an independent thallium deposit. Tl, F, Cl, I and B aresuggested as indicators for low-temperature mineralization with examples furnished for their ap-plications.
文摘The cyclic voltammetry(CV) and the square wave technique were used for the investigations of thallium(Ⅰ) underpotential deposition(UPD) on the silver electrode. A solution of 10 \{mmol/L\} HClO 4+10 mmol/L NaCl was selected as the supporting electrolyte. The calibration plots for Tl(Ⅰ) concentration in the range of 2×10 -9 -1×10 -7 mol/L were obtained. The detection limit was 5×10 -10 mol/L. For the solutions of 4 0×10 -9 mol/L thallium added before the urine sample pretreatment procedure, the average recovery was 105 6% with a relative standard deviation(RSD) of 15 5%.
