NDLI: Hexavalent Chromium Dynamics and Uptake in Manure-Added Soil

Content Provider	Springer Nature Link
Author	Molla, K. Dimirkou, A. Antoniadis, V.
Copyright Year	2012
Abstract	The soil dynamics of hexavalent Cr, a particularly mobile and toxic metal, is of a great environmental concern, and its availability to plants depends on various soil properties including soil organic matter. Thus, in a pot experiment, we added 50 mg Cr(VI) kg$^{−1}$ soil and studied Cr(VI) soil extractability and availability to spinach, where we applied both natural (zeolite), synthetic adsorptive materials (goethite and zeolite/goethite) and organic matter with farmyard manure. We found that, compared to the unamended control plants, dry matter weight in the Cr(VI)-added soil was greatly decreased to 17 % of the control, and height was decreased to 34 % of the control, an indication of Cr toxicity. Also, exchangeable Cr(VI) levels in soil decreased back to the unamended control even in the first soil sampling time. This was much faster than the exchangeable Cr(VI) levels in the mineral-added soil, where Cr(VI) levels were decreased to the levels of the unamended control in the third sampling time. The positive effect of organic matter was also indicated in the Cr quantity soil-to-plant transfer coefficient (in grams of Cr in plant per kilogram of Cr added in soil), a phyto-extraction index, which was significantly higher in the manure-amended (1.111 g kg$^{−1}$) than in the mineral-added treatments (0.568 g kg$^{−1}$). Our findings show that organic matter eliminates the toxicity of added Cr(VI) faster than the mineral phases do and enhances the ability of spinach to extract from soil greater quantities of Cr(VI) compared to mineral-added soils.
Starting Page	6059
Ending Page	6067
Page Count	9
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	223
Issue Number	9
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-10-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spinach Transfer coefficient Chromium reduction Phyto-extraction Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Soil Science & Conservation Environment Atmospheric Protection/Air Quality Control/Air Pollution Climate Change Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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