关键词: 生态混凝土, 草本植物, 重金属污染, 富集系数, 植物修复

Abstract: In order to determine herbs which can grow well in eco-concrete and can help us to restore environment, we select nine kinds of herbs according to the characters of climate and soil in Honghe prefecture of Yunnan Province. Then, we plant these herbs using the construction technology of eco-concrete and analyze the concentrations of heavy metals, including Pb, Zn, Cu, Cr, Hg and Cd. Experimental results show that (1) Cynodon dactylon ,Vetiveria zizanioides L., Carex ‘Evergold’ has the highest ability of enriching Pb, Zn, Hg, and Commelina communis has the highest ability of enriching Cu, Cr, Cd; (2) average concentration coefficient of heavy metal of Commelina communis is the highest, followed by Bidens pilosa L., Carex ‘Evergold’, Vetiveria zizanioides L., Ophiopogon bodinieri, Cyperus rotundus, Cynodon dactylon, Nephrolepiscordifolia(L.)Presl and Canna indica L. In these herbs, average bioconcentration coefficients of heavy metal of Commelina communis, Bidens pilosa L. and Carex ‘Evergold’ are all bigger than 1. In comprehensive consideration of the herbs’ ability of enriching heavy metals and the conditions of growing in eco-concrete, we decide that Commelina communis and Vetiveria zizanioides L. are the most suitable for eco-concrete engineering among the nine kinds of herbs.

Key words: eco-concrete, herb, heavy metal contamination, concentration factor, phytoremediation