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Agriculture 2016, 6(4), 64; doi:10.3390/agriculture6040064

Effect of Application of Increasing Concentrations of Contaminated Water on the Different Fractions of Cu and Co in Sandy Loam and Clay Loam Soils

1
Department of Geography and Environmental Studies, School of Natural Sciences, University of Zambia, Lusaka 10101, Zambia
2
Deputy Vice Chancellor, Zambia Open University, Lusaka 10101, Zambia
*
Author to whom correspondence should be addressed.
Academic Editors: Rabin Bhattarai and Paul Davidson
Received: 26 September 2016 / Revised: 10 November 2016 / Accepted: 23 November 2016 / Published: 5 December 2016
(This article belongs to the Special Issue Water Quality for Agriculture)
View Full-Text   |   Download PDF [1544 KB, uploaded 5 December 2016]   |  

Abstract

This study aimed to establish the fate of copper (Cu) and cobalt (Co) in sandy loam and clay loam soils that had been irrigated with increasing concentrations of contaminated water. A sequential extraction procedure was used to determine the fractions of Cu and Co in these soils. The concentration of bioavailable Cu and Co on clay loam was 1.7 times that of sandy loam soil. Cu on sandy loam soil was largely in the organic > residual > exchangeable > water-soluble > carbonate fractions, whereas on clay loam soil the element was largely in organic > exchangeable > residual > carbonate > water-soluble fractions. Co was largely observed in the exchangeable, water-soluble, and carbonate fractions, but with no particular trend observed in both soil types. When crops are grown on sandy soils that have a low capacity to hold heavy metals, the resulting effect would be high uptake of the heavy metals in crop plants. Because the predominant forms of Cu and Co vary in soils, it is expected that the metals will behave differently in the soils. View Full-Text
Keywords: cobalt; copper; contaminated irrigation water; sequential extraction; soil texture cobalt; copper; contaminated irrigation water; sequential extraction; soil texture
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Volk, J.; Yerokun, O. Effect of Application of Increasing Concentrations of Contaminated Water on the Different Fractions of Cu and Co in Sandy Loam and Clay Loam Soils. Agriculture 2016, 6, 64.

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