Heavy-metal extraction from aqueous medium with an immobilized TiO2 photocatalyst and a solid sacrificial agent

被引：37

作者：

Tennakone, K ^{[1
]}

Wijayantha, KGU ^{[1
]}

机构：

[1] Inst Fundamental Studies, Kandy, Sri Lanka

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1998年 / 113卷 / 01期

关键词：

heavy metal removal; photocatalysis; titanium dioxide; sacrificial agent;

D O I：

10.1016/S1010-6030(97)00304-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A system consisting of a layer of calcium oxalate coated on paper followed by a layer of TiO2 above calcium oxalate is found to extract heavy metals (Pb, Hg) from an aqueous medium under solar irradiation. The mechanism involves the transfer of photogenerated electrons to metal ions in the solution with consumption of holes by calcium oxalate. It is suggested that dangling carboxylate bonds on the surface of calcium oxalate facilitate hole transfer towards calcium oxalate. (C) 1998 Elsevier Science S.A.

引用

页码：89 / 92

页数：4

共 14 条

[1]

BORGARELLO E, 1985, NEW J CHEM, V9, P743

[2] AN INFRARED STUDY OF PHOTOCATALYTIC REACTION BETWEEN TITANIUM DIOXIDE AND SILVER NITRATE [J].