Removal of trivalent samarium from aqueous solutions by activated biochar derived from cactus fibres

被引：45

作者：

Hadjittofi, Loukia ^{[1
]}

Charalambous, Styliana ^{[1
]}

Pashalidis, Ioannis ^{[1
]}

机构：

[1] Univ Cyprus, Dept Chem, CY-1678 Nicosia, Cyprus

来源：

JOURNAL OF RARE EARTHS | 2016年 / 34卷 / 01期

关键词：

samarium; waters; activated biochar fibres; enhanced sorption capacity; FTIR spectra; rare earths; ADSORPTION; EU(III);

D O I：

10.1016/S1002-0721(14)60584-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The efficiency of activated biochar fibres obtained from Opuntia Ficus Indica regarding the sorption of trivalent samarium (Sm(III)) from aqueous solutions was investigated by batch experiments. The effect of various physicochemical parameters (e.g. pH, initial metal concentration, ionic strength, temperature and contact time) on the Sm(III) adsorption was studied and the surface species were characterized by FTIR spectroscopy prior to and after the lanthanide sorption. The experimental results showed that the activated biochar fibres possessed extraordinary sorption capacity for Sm(III) in acidic solutions (q(max)=90 g/kg, pH 3.0) and near neutral solutions (q(max)=350 g/kg, pH 6.5). This was attributed to the formation of samarium complexes with the surface carboxylic moieties, available in high density on the lamellar structures of the bio-sorbent.

引用

页码：99 / 104

页数：6

共 26 条

[1] The effect of humic acid on the formation and solubility of secondary solid phases (Nd(OH)CO3 and Sm(OH)CO3) [J].