Irshad Muhammad, Ahmad Sajjad, Pervez Arshid, Inoue Mitsuhiro
a Department of Environmental Sciences , COMSATS Institute of Information Technology , Abbottabad , Pakistan.
Int J Phytoremediation. 2015;17(1-6):154-8. doi: 10.1080/15226514.2013.862208.
The objective of this research was to compare the potential of native plants for the phytoaccumulation of heavy metals (HM). Thirteen predominant plant species (including trees, bushes and grasses) namely Ricinus communis, Ipomoea carnea, Cannabis sativa, Parthenium hysterophorus, Acacia nilotica, Dalbergia sissoo, Acacia modesta, Solanum nigrum, Xanthium stromarium, Chenopodium album, Cynodon dactylon, Eleusine indica, and Dactyloctenium aegyptium were collected from the wastewater originated from Hattar industrial estate of Pakistan, Plants shoots and roots were analyzed for heavy metals/metalloid: Pb, Cr, Cd, Zn, Fe, Ni, and As. Among plant species, the accumulation potential for HM varied depending on the type of element. Regardless of the plant species, HM concentrations varied in the order of Fe>Zn>Cr>Pb>Ni>Cd>As. Tree species of R. communis, A. nilotica, A. modesta, and D. sissoo exhibited an enhanced concentrations of metals. Accumulation pattern of Fe, Pb, Cd, and As in plants could be related to the HM composition of soil and wastewater. Most of the species exhibited higher HM composition in the root as compared to shoot. The species that found with greater ability to absorb HM in the root, got higher HM concentrations in its shoot. Shoot tissue concentrations of HM were attained by the species as D. sissoo>A. modesta>A. nilotica>R. communis>I. carnea>C. album>E. indica>P. hysterophorus>S. nigrum>C. sativa>D. aegyptium>X. strumarium>C. dactylon. Based on results, tree plants were noticed as higher accumulators of HM in polluted soils.
本研究的目的是比较本地植物对重金属（HM）的植物累积潜力。从巴基斯坦哈塔尔工业区的废水源收集了13种主要植物物种（包括乔木、灌木和草本植物），即蓖麻、紫茉莉、大麻、银胶菊、阿拉伯金合欢、印度黄檀、小果灰叶、龙葵、苍耳、藜、狗牙根、牛筋草和埃及马唐。对植物的地上部分和根部进行了重金属/类金属分析：铅、铬、镉、锌、铁、镍和砷。在植物物种中，重金属的累积潜力因元素类型而异。无论植物物种如何，重金属浓度的变化顺序为铁>锌>铬>铅>镍>镉>砷。蓖麻、阿拉伯金合欢、小果灰叶和印度黄檀等乔木物种表现出较高的金属浓度。植物中铁、铅、镉和砷的累积模式可能与土壤和废水中的重金属组成有关。与地上部分相比，大多数物种的根部重金属含量更高。在根部吸收重金属能力较强的物种，其地上部分的重金属浓度也较高。地上组织中重金属浓度由高到低的物种顺序为：印度黄檀>小果灰叶>阿拉伯金合欢>蓖麻>紫茉莉>藜>牛筋草>银胶菊>龙葵>大麻>埃及马唐>苍耳>狗牙根。基于这些结果，在污染土壤中，乔木植物被认为是重金属的高累积者。
