id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
bionys-81	Ljupković, Radomir B.; Mitrović, Jelena; Radović, Miljana; Kostić, Miloš; Bojić, Danijela; Mitić-Stojanović, Dragana-Linda; Bojić, Aleksandar Lj.	Removal Cu(II) ions from water using sulphuric acid treated Lagenaria vulgaris Shell (Cucurbitaceae)	2014	5	.pdf	application/pdf	3311	147	58	The lower sorption of divalent metals observed at low pH values has been attributed to following factors: (a) repulsion between positive charge of the sorbent and free metal cations; (b) competition between H+ and free metal cations for the sorbent active sites; (c) lower formation of complexes with metal ions due to protonation of surface functional groups, and (d) combination of several of these factors (F i o l and V Effect of initial pH To determine the effect of initial pH on Cu(II) ions removal, experiments were conducted at pH 2, 3, 4, 5 and 6, adjusted with HNO3 or NaOH.	cache/bionys-81.pdf	txt/bionys-81.txt