Uptake and distribution of cd in sweet maize grown on contaminated soils: a field-scale study

Bioinorganic Chemistry and Applications
Wending XuXiaoyun Yi

Abstract

Maize is an economic crop that is also a candidate for use in phytoremediation in low-to-moderately Cd-contaminated soils, because the plant can accumulate high concentration of Cd in parts that are nonedible to humans while accumulating only a low concentration of Cd in the fruit. Maize cultivars CT38 and HZ were planted in field soils contaminated with Cd and nitrilotriacetic acid (NTA) was used to enhance the phytoextractive effect of the maize. Different organs of the plant were analyzed to identify the Cd sinks in the maize. A distinction was made between leaf sheath tissue and leaf lamina tissue. Cd concentrations decreased in the tissues in the following order: sheath > root > lamina > stem > fruit. The addition of NTA increased the amount of Cd absorbed but left the relative distribution of the metal among the plant organs essentially unchanged. The Cd in the fruit of maize was below the Chinese government's permitted concentration in coarse cereals. Therefore, this study shows that it is possible to conduct maize phytoremediation of Cd-contaminated soil while, at the same time, harvesting a crop, for subsequent consumption.

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Citations

Feb 28, 2016·Enzyme and Microbial Technology·Qin ZhengMin-Tian Gao
Dec 8, 2015·Journal of Basic Microbiology·Qingyun XuMin-Tian Gao
Apr 12, 2016·Environmental Geochemistry and Health·Muhammad RizwanFakhir Hannan
Jan 13, 2015·International Journal of Phytoremediation·Wending XuZhi Dang
Oct 26, 2016·Chemosphere·Catherine JumarieMonique Boily
Nov 22, 2018·Frontiers in Plant Science·Jachym SumanTomas Macek
Feb 10, 2019·Environmental Science and Pollution Research International·Aekkacha TananonchaiUsa Sukkha
Aug 26, 2021·Environmental Science and Pollution Research International·Muhammad TahirMuhammad Kamran

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