Selective removal of Pb2+ by AlPO4

被引：9

作者：

Naeem, A ^{[1
]}

Mustafa, S ^{[1
]}

Rehana, N ^{[1
]}

Dilara, B ^{[1
]}

Murtaza, S ^{[1
]}

机构：

[1] Univ Peshawar, Natl Ctr Excellence Phys Chem, Peshawar, Pakistan

来源：

ENVIRONMENTAL TECHNOLOGY | 2003年 / 24卷 / 06期

关键词：

sorption; ion exchange; metal ions; metal phosphates; potentiometric titration;

D O I：

10.1080/09593330309385614

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Aluminium(III) phosphate was observed to have a very high selectivity towards Pb2+ ions. Under similar conditions, the sorption capacities of the exchanger were observed to follow the order: Pb2+ > Zn2+ > Ni2+ > Co2+. The potentiometric titration data were used to determine the deprotonation constants (pKa) of AlPO4, which were dependent upon the temperature and nature of the metal cations present in the aqueous phase. Different physico-chemical methods i.e. FTIR, EPM and the wet chemical analyses were used to investigate the uptake mechanism of Pb2+ by the solid, which showed that no new solid phases were present in the solid residue after sorption of Pb2+ at pH 5. The exchange between protons from the surface and Pb2+ from solutions was found to be responsible for Pb2+ sorption by aluminum(III) phosphate.

引用

页码：779 / 785

页数：7

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