Biosorption Potential of the Main Fractions Separated from Peat (Poiana Stampei, Romania)
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2017, Vol 63, Issue 3
Abstract
In this study it was investigated the separation possibility of the main organic fraction of peat (Poiana Stampei, Romania), consisting in humic substances and cellulosic waste, for its use as biosorbents in the removal process of Cu(II) ions from aqueous solution. In order to separate the two fractions, the peat was treated with sodium hydroxide solutions of different concentrations (0.1 – 4.0 N), at two different temperatures (20 and 50C) for 3 h of mixing. In this way, only the solubilisation of humic substances from the peat composition takes place, which can be separated from cellulosic waste by filtration. After filtration, the humic substances were re-precipitated in strong acid media (pH < 1.0), and then both obtained fractions were washed and dried in air. The efficiency of separation process was evaluated in each case. All resulted fractions were used as biosorbents for the removal of Cu(II) ions from aqueous solution. The experimental results have shown that the fractions separated by the treatment of peat with 2N NaOH solution at 50C exhibit the highest biosorption capacities.
Authors and Affiliations
SILVIA PRUTEANU, LAURA BULGARIU, Maria GAVRILESCU
Keywords
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