Abstract
The remediation performances of heavy metals contaminaged sediment by hydrophytes including Alternanthera Philoxeroides, Canna indica L., Nymphaea tetragona, Typha orientalis, Phragmites australis, Phragmites australis, Hydrilla verticillata, Cyperus alternifolius L., Eichhornia crassipes, Acorus tatarinowii, Digitaria sanguinalis (L.) Scop were investigated through batch pot experiments. The results showed that the enrichment effect of Pb was better in Alternanthera Philoxeroides and Acorus tatarinowii with the BCFs of 4.42 and 1.22, and the TFs of 7.84 and 4.23, respectively. The Cr enrichment effects by Nymphaea tetragona, Hydrilla verticillata and Eichhornia crassipes (Mart.) Solms were better, which BCFs were 2.69, 1.91 and 3.71, and which TFs were 7.93, 2.07 and 2.18, respectively.
Highlights
With the rapid development of industry and agriculture, heavy metal pollution in soils or sediments in rivers is becoming increasingly serious [1]
The aim of this study is to investigate the remediation performance of the common hydrophytes used in artificial wet land in heavy metal contaminated sediments through batch pot experiments
The Bioconcentration factor (BCF) and Translocation factor (TF) changes of Pb and Cr for the 10 plants during the 120d were shown in Fig. 1. and Fig. 2., respectively
Summary
With the rapid development of industry and agriculture, heavy metal pollution in soils or sediments in rivers is becoming increasingly serious [1]. Soil/sediment contaminated by heavy metals will have a direct impact on plant growth and development [2], and accumulate in vegetables, food crops and fruits, seriously affecting the yield and safety of agricultural products and further endangering human health through the food chains [3]. Phytoremediation is a kind of bioremediation technology [13], removing pollutants from sediments by absorption, volatilization, transformation and degradation of plants and their rhizosphere microbial system [14]. It is widely concerned for its advantages of purifying water body [15], removing nitrogen and phosphorus pollutants from sediments in rivers or lakes [16], and having landscape view. The aim of this study is to investigate the remediation performance of the common hydrophytes used in artificial wet land in heavy metal contaminated sediments through batch pot experiments
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