Experimental Study on Ornamental Plants Remediation of Heavy Metals in Sewage Sludge

Authors Bai Xiangyu; Liu Hanhu; Han Baoping; Su Xiaoli; Qin Feng

Journal Enuivonmental Science and Technology , 2010,10:33

Abstract 4 native ornamental plants of Xuzhou, Shandong Province were selected to study the remediation effects of heavy metals in sewage sludge of Yaozhuang Wastewater Treatment Plant through pot experiments. Results showed that heavy metals in sewage sludge had no poison to Chlorophytum comosum which grew well in the period of experiment, while Calendula of ficinalis L, Petunia hyhrida Vilm and Viola tricolor Linn were subject to some extent poisoning effect of heavy metals. Analyzing from accumulation property,4 ornamental plants had some effects of enriching and transfer on heavy metals, but did not reach the standard of hyperaccumulators. In the shoots of 4 ornamental plants, Chlorophytum comosum had the maximum amounts of accumulation on Cu, Zn, and Pb, with total amounts of 2.58mg/plant,5.76mg/plant and 0.29mg/plant respectively. Calendula of ficinalis L had the maximum amount of accumulation on Cd, with amount of 0.200mg/plant. In the roots of 4 ornamental plants, Chlorophytum comosum had the maximum amounts of accumulation on Cu, Zn, Pb and Cd, with total amounts of 3.12mg/plant, 8.77mg/plant,0.29mg/plant and 0.24mg/plant respectively. Analyzing from duration, accumulation property and total amounts of accumulation, Chlorophytum comosum had better phytoremediation effects than other three ornamental plants

Species covered 吊兰 Chlorophytum comosum