Potential hyperaccumulation of Pb, Zn, Cu and Cd in endurant plants distributed in an old smeltery, northeast China |
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| Authors: | Shuang Cui Qixing Zhou Lei Chao |
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| Institution: | (1) Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China;(2) Graduate Schools of the Chinese Academy of Sciences, Beijing, 100039, China;(3) College of Environmental Science and Engineering, Nankai University, Tianjin, 300071, China |
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| Abstract: | The absorption and accumulation of Pb, Zn, Cu and Cd in some endurant weed plant species that survived in an old smeltery
in Liaoning, China, were systematically investigated. Potential hyperaccumulative characteristics of these species were also
discussed. The results showed that metal accumulation in plants differed with species, tissues and metals. Endurant weed plants
growing in this contaminated site exhibited high metal adaptability. Both the metal exclusion and detoxification tolerance
strategies were involved in the species studied. Seven species for Pb and four species for Cd were satisfied for the concentration
time level standard for hyperaccumulator. Considering translocation factor (TF) values, one species for Pb, seven species
for Zn, two species for Cu and five species for Cd possessed the characteristic of hyperaccumulator. Particularly, Abutilon theophrasti Medic, exhibited strong accumulative ability to four heavy metals. Although enrichment coefficients of all samples were lesser
than 1 and the absolute concentrations didn’t reach the standard, species mentioned above were primarily believed to be potential
hyperaccumulators. |
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| Keywords: | Heavy metal Hyperaccumulator Phytoremediation Smeltery Soil contamination China |
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