NDLI: Chemical speciation and bioavailability of cadmium in the temperate and semiarid soils treated with wheat residue

Content Provider	Springer Nature Link
Author	Safari Sinegani, Ali Akbar Jafari Monsef, Milad
Copyright Year	2016
Abstract	Heavy metal bioavailability depends on metal fractions in soil. The impacts of mild wheat residue (<2 mm) and incubation time on fractions of Cd were studied in two different spiked soils sampled from Hamadan and Lahijan, Iran with semiarid and temperate climates, respectively. Two factorial experiments were done in two soils polluted with 10 μg Cd g$^{−1}$ soil separately. Organic matter (0 and 5 % wheat straw) and soil incubation time (24 and 3600 h) were factors examined in three replicates. The transformation of Cd from KNO$_{3}$ extractable form to less available fractions was higher in semiarid soils with lower clay and OM contents and higher pH and carbonate contents compared to temperate soils. In polluted semiarid soils after 24 h incubation, greater content of Cd was observed in residual (HNO$_{3}$ extractable) (45 %), carbonates associated (EDTA extractable) (34 %), organic matter associated (NaOH extractable) (11 %), and KNO$_{3}$ extractable (10 %) fractions, but in temperate soils, greater content of Cd was observed in KNO$_{3}$ extractable (61 %), HNO$_{3}$ extractable (14 %), EDTA extractable (13 %), and NaOH extractable (12 %) fractions. KNO$_{3}$ extractable form of Cd was decreased, and NaOH extractable and HNO$_{3}$ extractable forms of Cd were increased by addition of wheat residue to both soils. The initial decrease of added Cd from KNO$_{3}$ extractable form to less mobile fractions in Hamadan soil was very interesting. But this change was not observed in Lahijan soil. Since contamination factor was significantly high in temperate soils compared to semiarid soils in all treatments, the risk of Cd environmental pollution in temperate region is considerably high.
Starting Page	9750
Ending Page	9758
Page Count	9
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	23
Issue Number	10
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-02-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cadmium fractionation, wheat residue, incubation time Contamination factor Temperate and semiarid soils Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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