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

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (9) Citing Articles via Google Scholar Google Scholar Articles by Zhang, M. Articles by Yang, X. Search for Related Content PubMed PubMed Citation Articles by Zhang, M. Articles by Yang, X. GeoRef GeoRef Citation Agricola Articles by Zhang, M. Articles by Yang, X. Related Collections Runoff Heavy Metals Water Pollution

TECHNICAL REPORTS
Heavy Metals in the Environment

Surface Runoff Losses of Copper and Zinc in Sandy Soils

^a Dep. of Natural Resource Sciences, College of Natural Resource and Environmental Sciences, Zhejiang Univ., Huajiachi Campus, Hangzhou 310029, China
^b Univ. of Florida, Institute of Food and Agricultural Sciences, Indian River Research and Education Center, Fort Pierce, FL 34945-3138

^* Corresponding author (zhe{at}mail.ifas.ufl.edu)

Received for publication July 18, 2002. Increased anthropogenic inputs of Cu and Zn in soils have caused considerable concern relative to their effect on water contamination. Copper and Zn contents in surface soil directly influence the movement of Cu and Zn. However, minimal information is available on runoff losses of Cu and Zn in agricultural soils, and soil-extractable Cu and Zn in relation to runoff water quality. Field experiments were conducted in 2001 to study dissolved Cu and Zn losses in runoff in Florida sandy soils under commercial citrus and vegetable production and the relationship between soil-extractable Cu and Zn forms and dissolved Cu and Zn concentrations in runoff water. Five extraction methods were compared for extracting soil available Cu and Zn. Concentrations of dissolved Cu and Zn in runoff were measured and runoff discharge was monitored. Mean dissolved Cu in field runoff water was significantly correlated with the extractable Cu obtained only by 0.01 mol L^-1 CaCl₂, Mehlich 1, or DTPA–TEA methods. Dissolved Zn in runoff water was only significantly correlated with extractable Zn by 0.01 mol L^-1 CaCl₂. The highest correlations to dissolved Cu in runoff were obtained when soil-available Cu was extracted by 0.01 mol L^-1 CaCl₂. The results indicate that 0.01 mol L^-1 CaCl₂–extractable Cu and Zn are the best soil indexes for predicting readily released Cu and Zn in the sandy soils. Both runoff discharge and 0.01 mol L^-1 CaCl₂–extractable Cu and Zn levels had significant influences on Cu and Zn loads in surface runoff.

Abbreviations: DTPA, diethylenetriaminepentaacetic acid • TEA, triethyl amine

Related articles in JEQ:

This Issue in Journal of Environmental Quality

JEQ 2003 32: 745-750. [Full Text]  

This article has been cited by other articles:

				Z. L. He, M. Zhang, X. E. Yang, and P. J. Stoffella Release Behavior of Copper and Zinc from Sandy Soils Soil Sci. Soc. Am. J., August 22, 2006; 70(5): 1699 - 1707. [Abstract] [Full Text] [PDF]

				Z. L. He, M. K. Zhang, D. V. Calvert, P. J. Stoffella, X. E. Yang, and S. Yu Transport of Heavy Metals in Surface Runoff from Vegetable and Citrus Fields Soil Sci. Soc. Am. J., September 1, 2004; 68(5): 1662 - 1669. [Abstract] [Full Text] [PDF]