College of Biochemical Engineering, Beijing Union University, Beijing 100023, China.
Int J Environ Res Public Health. 2023 Feb 11;20(4):3185. doi: 10.3390/ijerph20043185.
A variety of remediation approaches have been applied to reduce the harm and diffusion of heavy metals in aquatic sediments; however, phytoremediation in co-contaminated soils is still not clear. In order to explore the phytoremediation of sediments contaminated by Cu and Pb, two submerged plants with different characteristics, and , were interplanted with . By simulating a submerged plant ecological environment, medium-scale-simulated ecological remediation experiments were carried out. The results showed that the two planting patterns were effective in repairing the sediments in the Cu and Pb contaminated sediments. The intercropping of and can be used as the plant stabilizer of Cu because of the TF > 1 and BCF < 1, and the intercropping with can regulate the enrichment efficiency of . The removal rates of Cu and Pb in sediments reached 26.1% and 68.4%, respectively, under the two planting patterns. The risk grade of the restored sediments was RI < 150, indicating a low risk.
已经应用了多种修复方法来减少水体重金属的危害和扩散；然而，对于受重金属复合污染土壤的植物修复仍然不清楚。为了探索 Cu 和 Pb 污染沉积物的植物修复，采用两种具有不同特性的沉水植物 和 与 进行间作。通过模拟沉水植物生态环境，进行了中等规模模拟生态修复实验。结果表明，两种种植模式均能有效修复 Cu 和 Pb 污染沉积物中的沉积物。由于 TF > 1 和 BCF < 1，因此 和 的间作可以用作 Cu 的植物稳定剂，而与 的间作可以调节 的富集效率。在两种种植模式下，沉积物中 Cu 和 Pb 的去除率分别达到 26.1%和 68.4%。修复沉积物的风险等级 RI < 150，表明风险较低。
