菖蒲和芦苇对复合重金属胁迫的生理反应及其富集能力

发布时间：2018-07-28 20:06

【摘要】：研究了水生植物菖蒲和芦苇对复合重金属(V、Cr和Cd)的富集能力及对重金属的生理响应,以考察这两种植物对重金属污染水体的修复效果.结果表明,随着水体中重金属污染浓度的提高,两种植物的耐性系数均有所下降,但菖蒲的生长状况优于芦苇.在不同重金属污染浓度下,菖蒲和芦苇均表现出对Cd的富集能力最强,其次是Cr,而对V的富集能力相对较弱.在相同重金属浓度下,菖蒲对三种重金属的富集总量大于芦苇,在重金属质量浓度为15 mg·L~(-1)时,菖蒲对三种重金属的富集量分别是1065.02、1754.80和4372.40 mg·kg~(-1),且菖蒲地下部分对V、Cr和Cd的富集系数分别是芦苇的2.1倍、1.5倍和1.8倍.综合考虑得出菖蒲比芦苇更适用于V、Cr和Cd复合重金属污染的修复.
[Abstract]:The enrichment ability and physiological response of aquatic plants Acorus calamus and Reed to complex heavy metals (VtCr and CD) were studied in order to investigate the remediation effect of these two plants on polluted water with heavy metals. The results showed that the tolerance coefficient of the two plants decreased with the increase of heavy metal pollution concentration, but the growth condition of Acorus calamus was better than that of Reed. Under different concentrations of heavy metal pollution, both Acorus calamus and Reed showed the strongest CD enrichment ability, followed by Cr, while the V enrichment ability was relatively weak. At the same concentration of heavy metals, the total concentration of three heavy metals in Acorus calamus was higher than that in Reed, and the concentration of heavy metal was 15mg / L ~ (-1). The concentrations of three heavy metals in Acorus calamus were 1065.02C 1754.80 and 4372.40 mg kg ~ (-1), respectively, and the enrichment coefficients of V _ (Cr) and CD in the underground part of Acorus calamus were 2.1 times and 1.8 times of those of Reed, respectively. It is concluded that Acorus calamus is more suitable than Reed for the remediation of complex heavy metal pollution of VN Cr and CD.
【作者单位】：北京科技大学能源与环境工程学院;工业典型污染物资源化处理北京市重点实验室;
【基金】：国家水体污染控制与治理科技重大专项资助项目(2015ZX07205-003)
【分类号】：X173

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