id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-37619	Ogala, Jude	The geochemistry of lignite from the Neogene Ogwashi-Asaba Formation, Niger Delta Basin, southern Nigeria	2012	14	.pdf	application/pdf	9099	490	64	Trace elements indicated the following concentration range in parts per million (ppm): Be (2-5), Zr (4-63), Sr (5-22), y (13-68), Ba (9-89), V (4-216), Zn (17- 176), Ni (8-28), Co (5-13), Cr (2-31), Cu (1-22) and Ga (1-14). Several researchers have attempted to study the geochemical features of trace elements contained in coal to understand and evaluate trace elements’ mode of occurrence as well as their behaviour during combustion (Gluskoter et al., 1977; Swaine, 1990; Finkelman, 1994; meij, 1995; Spears and Zheng, 1999; Davidson, 2000; Vassilev et al., 2001).	cache/esrj-37619.pdf	txt/esrj-37619.txt