作者: Shahzad Afzal , Muhammad Younas , Karamat Ali
DOI: 10.1080/02508060008686850
关键词:
摘要: Abstract A regional study of Selenium (Se) speciation in surface waters, groundwaters, and saturation extracts from Soan-Sakesar valley Salt-Range, Pakistan was started March 1994 completed October 1996. Groundwaters, streams, springs had median concentrations of: total Se 48, 404.5, 82 μg/l; Se+VI 40, 350 51 Se+IV 8, 48 29 Se-II 0, 6.5 2.0 μg/l, respectively. The concentration exceeded the recommended water quality guidelines for drinking irrigation 10 20 In extracts, Se, Se+VI, were 190, 146, 37 7.0 Uchhali, Khabbaki Jahlar lake samples mean 2103, 670 297 1777, 470, 233 291, 166 39 35, 34 25 Sakesar limestone Formation Eocene age rich shales fossils (median 7.2 μg/kg) are considered to be source selenium ...