Lead accumulation and phytostabilization potential of dominant plant species growing in a lead–zinc mine tailing

Abstract

Screening out plants that are hyper-tolerant to certain heavy metals plays a fundamental role in remediation of mine tailing. In this study, nine dominant plant species growing on lead-zinc mine tailing and their corresponding non-mining ecotypes were investigated for their potential phytostabilization of lead. Lead concentration in roots of these plants was higher than in shoots, and the highest concentrations of lead were found in Athyrium wardii: 15542 and 10720 mg kg -1 in the early growth stage (May) and vigorous growth stage (August) respectively, which were 426 and 455 times higher than those of the non-mining ecotypes. Because of poor lead translocation ability, lead accumulation in roots reached as high as 42 mg per plant. Available lead in the rhizosphere soils of A. wardii was 310 mg kg -1 , which was 17 times higher than that of the non-rhizosphere soil. Lead concentrations of roots for the nine mining ecotypes were positively correlated with available lead in the rhizosphere soils, whereas a negative correlation was observed in the non-mining ecotypes. These results suggest that A. wardii was the most promising candidate among the tested species for lead accumulation in roots, and it could be used for phytostabilization in lead polluted soils.

Influence of organic amendments on phytostabilization of Cd-contaminated soil by Eucalyptus camaldulensis

“…Metal uptake indicates metal concentration in the plant part which is sequestered by translocation processes 11 . The translocation factor (TF), which indicates the degree of metal movement within the plant 20 , was calculated as TF = C shoot /C root , and the bioconcentration factor for the root (BCFR), which provides an indication of the root accumulation potential 21 , was calculated as BCFR = C root /C * soil , where C * soil is the metal-extractable concentration in the soil.…”

Exploring element accumulation patterns of a metal excluder plant naturally colonizing a highly contaminated soil

“…For example, they analyze a limited number of elements, or a restricted number of samples, or show result analysis limited to classical statistics, unable to correctly catch the variability of data with dependent behavior, such as element concentration in soils and plants from the same site [for all the mentioned issues, see e.g. [18][19][20][21][22].…”

Adaptability Study of Samama (Anthocephalus macrophyllus) on Several Lead (Pb) Level

“…Nilai FT semai samama berkisar antara 0.1 -0.8. Nilai TF < 1.0 menunjukkan jika konsentrasi logam berat di pucuk lebih rendah daripada di akar (Zou et al, 2012 Mekanisme penyerapan dan akumulasi logam berat oleh tanaman meliputi: 1) penyerapan logam oleh akar, khususnya di area rhizosfer, 2) translokasi logam dari akar ke bagian tanaman lainnya mengikuti aliran transpirasi melalui jaringan pengangkut (xilem dan floem), dan 3) lokalisasi logam pada sel dan jaringan (Hardiani, 2009). Pada tanaman yang memiliki kemampuan mentransolaksi Pb ke bagian pucuk, Pb akan dilokalisasi pada bagian tertentu, biasanya bagian vakuola daun.…”