HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Voegelin, A. Articles by Kretzschmar, R. Search for Related Content PubMed Articles by Voegelin, A. Articles by Kretzschmar, R. GeoRef GeoRef Citation Agricola Articles by Voegelin, A. Articles by Kretzschmar, R. Related Collections Batch Studies Toxic Trace Metals Sorption/Exchange Heavy Metals Soil Pollution

Zinc Fractionation in Contaminated Soils by Sequential and Single Extractions: Influence of Soil Properties and Zinc Content

Soil Chemistry Group, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, ETH Zentrum CHN, CH-8092 Zürich, Switzerland

View larger version (16K): [in this window] [in a new window]   Fig. 1. Total Zn contents versus soil pH for acidic (pH <6; Table 2) and neutral (pH 6; Table 3) soils (separated by vertical dashed line). Soils with total Zn contents of <23 mmol kg–1, 23 to 78 mmol kg–1, and >78 mmol kg–1 are separated by horizontal dashed lines.

View larger version (76K): [in this window] [in a new window]   Fig. 2. Results from the sequential extraction of acidic soils (A, C) and neutral soils (B, D). Absolute amounts are shown in the upper panels (A, B) and relative amounts (normalized by the sum of extracted Zn) in the lower panels (C, D). Soils are arranged by increasing total Zn content (X-ray fluorescence analyses) from left to right. The hypothetical interpretation of the sequential extraction is provided in Table 1.

View larger version (21K): [in this window] [in a new window]   Fig. 3. Summarizing comparison of the sequentially extracted fractions of Zn in acidic soils (open boxes) and neutral soils (hatched boxes). Boxes cover the 25th to 75th percentile range (including the median [lines dividing boxes] and the arithmetic mean [squares]), bars cover the 5th to 95th percentile range, and crosses indicate the maximum and minimum values. The hypothetical interpretation of the extracted fractions is provided in Table 1.

View larger version (31K): [in this window] [in a new window]   Fig. 4. (A) Sum of Zn extracted in the fractions F1 and F2 versus total Zn (linear regression Eq. [16] from Table 6). (B) Ratio of Zn in F1 over sum of Zn extracted in F1 and F2 (line: F1/(F1+F2) calculated using linear regression Eq. [17] from Table 6). (C) Ratio of Zn extracted by 0.01 mol L–1 CaCl2 (SSR = 50 L kg–1) over Zn in F1 (1 mol L–1 NH4NO3; SSR = 25 L kg–1). (D) Ratio of Zn extracted by 0.1 mol L–1 BaCl2 (SSR = 30 L kg–1) over Zn in F1 (1 mol L–1 NH4NO3; SSR = 25 L kg–1).