Removal of hexavalent chromium from dilute aqueous solution by coniferous leaves

被引：35

作者：

Aoyama, M

Sugiyama, T

Doi, S

Cho, NS

Kim, HE

机构：

[1] Hokkaido Forest Prod Res Inst, Asahikawa, Hokkaido 0710198, Japan

[2] Akita Prefectural Coll Agr, Inst Wood Technol, Noshiro 0160876, Japan

[3] Chungbuk Natl Univ, Sch Forest Resources, Chongju 360763, South Korea

来源：

HOLZFORSCHUNG | 1999年 / 53卷 / 04期

关键词：

removal of chromium(VI); adsorption; water treatment; coniferous leaves; Freundlich isotherm;

D O I：

10.1515/HF.1999.060

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The ability of coniferous leaves to remove Cr(VI) from dilute aqueous solutions by physico-chemical adsorption and chemical reduction was investigated. Of 30 coniferous tree species tested, relatively high removal ability was found in Ginkgo, Larix, Pinus, Cryptomeria, Metasequoia, Taxodium, Thuja and Thujopsis spp. To search for optimum operation condition for treatment of wastewater containing Cr(VI), factors affecting Cr(VI) removal were studied using P. densiflora leaves. The extent of the removal was dependent upon the initial solution pH, contact time, temperature and initial concentration of Cr(VI) in solution. The Cr(VI) removal was mainly governed by the physico-chemical adsorption onto the substrate. The adsorption data were well fitted to the Freundlich isotherm.

引用

页码：365 / 368

页数：4

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