Accumulation of heavy metals in four grasses grown on lead and zinc mine tailings

编号 zgly0000350048

文献类型 期刊论文

文献题名 Accumulation of heavy metals in four grasses grown on lead and zinc mine tailings

学科分类 220.10;林业基础学科

作者 SHUWen-sheng  ZHAOYun-lin  YANGBing  XIAHan-ping  LANChong-yu 

作者单位 SchoolofLifeSciences  HunanCityCollege  SouthChinaInstituteofBotany 

母体文献 Journal of Environmental Sciences;环境科学学报: 英文版 

年卷期 2004,16(5)

页码 730-734

年份 2004 

分类号 X173  X503.23 

关键词 锌矿  重金属  废渣  环境污染  环境保护  植物 

文摘内容 A field experiment was conducted to compare the growth and metal accumulation of Vetiveria zizanioides, Paspalum notatum, Cynodon dactylon and Imperata cylindraca var. major on the tailings, amended with 10 cm domestic refuse + complex NPK fertilizer(Treatment A), 10 cm domestic refuse(Treatment B) and complex NPK fertilizer(Treatment C) respectively, and without any amendment used as control (Treatment D). The results indicated that V. zizanioides was a typical heavy metal excluder, because the concentrations in shoots of the plants were the lowest among the four plants tested. The most of metal accumulated in V. zizanioides distributed in its root, and transportation of metal in this plant from root to shoot was restricted. Therefore, V. zizanioides was more suitable for phytostabilization of toxic mined lands than P. notatum and C. dactylon, which accumulated a relatively high level of metals in their shoots and roots. It was also found that I. cylindraca var. major accumulated lower amounts of Pb, Zn and Cu than C. dactylon and P. notatum, and could also be considered for phytostaliUsaton of tailings. Although the metal(Pb, Zn and Cu) concentrations in shoots and roots of V. zizanioides were the lowest, the total amounts of heavy metals accumulated in shoots of V. zizanioides were the highest among the four tested plants due to the highest dry weight yield of it. The results indicated that V. zizanioides was the best choice among the four species used for phytoremediation (for both phytostabilization and phytoextraction) of metal contaminated soils。