[Study on phase distribution and release of heavy metal in pyrite using sequential extraction procedure and ICP-MS].
Heavy metal elements of V, Cr, Mn, Co, Ni, Cu, Zn, Sr, Mo, Cd, Sb, Ba and Pb were determined by ICP-MS. The linear ranges of determination for these elements were obtained, and the correlation coefficients were larger than 0.997. The detection limit ranges were from 0.005 to 0.01 microg x L(-1) and the RSDs were lower than 5%. Phase distributions of heavy metals in pyrite were analyzed by ICP-MS with sequential extraction procedure. The result showed that Pb was the main heavy metal in pyrite and its total content was 830 mg x kg(-1). Pb existed mostly in carbonate or galena (PbS) phase of pyrite and the proportion was 56.9%. Pb existed less in iron oxides with 29.7% in proportion, and least in sulfide and silicate with 3.5% and 9.9%, respectively. The release of Pb in pyrite was primary in natural environment, but the release of Cr and Cd was not be ignorable, too.
Zhang
Ping
P
Guangzhou Key Laboratory of Pullution Control and Isotope Application, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China. zhangping@gzhu.edu.cn
Qi
Jian-Ying
JY
Yang
Chun-Xia
CX
Chen
Yong-Heng
YH
D002104:Cadmium / Q000032:analysis / Q000302:isolation & purification; D002857:Chromium / Q000032:analysis / Q000302:isolation & purification; D004784:Environmental Monitoring / Q000379:methods; D007501:Iron / Q000737:chemistry*; D007854:Lead / Q000032:analysis / Q000302:isolation & purification; D013058:Mass Spectrometry / Q000379:methods*; D019216:Metals, Heavy / Q000032:analysis* / Q000302:isolation & purification; D013440:Sulfides / Q000737:chemistry*
D019216:Metals, Heavy; D013440:Sulfides; D002104:Cadmium; D002857:Chromium; C011342:pyrite; D007854:Lead; D007501:Iron