文档介绍：Advances in Environmental Research 4Ž. 2000 113᎐122
Comparisons of metal-ion binding to immobilized
biogenic materials in a flowing system
Peter C. Stark1, Gary D. RaysonU
Department of Chemistry and Biochemistry, New Mexico State Uni¨ersity, Box 30001, Dept. 3C, Las Cruces, NM 88003,
USA
Accepted 20 March 2000
Abstract
The binding of AlŽ. III , Cu Ž. II , and Ag Ž. I to each of 10 biologically generated materials immobilized within a
polysilicate matrix has been investigated within a flowing system. The biogenic materials studied included sphagnum
peat, a top soil, peat, compost peat, organic peat, peat replacer, dead Chlorella ¨ulgaris green algae , and a cultured
cell material from the plant Datura innoxia. Breakthrough curves were generated for flow rates of one-sixth bed
volume per minuteŽ. ml bed volume . Metal binding was observed to vary with the Lewis acidity of the targeted
metalŽ. increasing from hard to soft . ᮊ 2000 Elsevier Science Ltd. All rights reserved.
Keywords: Metal binding; Biomaterials; Breakthrough curves
ŽWatkins et al., 1987; Greene and Darnall, 1988; Ma-
han and be, , adsorption Sakaguchi and
1. Introduction Nakajima, 1987; Scott, 1992. , and anic micropre-
cipitation processesŽ. Volesky, 1990 . Specifically
Ž.
Biosorption, the use of biologically inactive microor- Watkins et al. 1987 have reported that bioso