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In situ phytoremediation of copper and cadmium in a co-contaminated soil and its biological and physical effects

机译：在共污染土壤中铜和镉的原位植物化及其生物学和物理效应

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Phytoremediation is a potential cost-effective technology for remediating heavy metal-contaminated soils. This method was used to evaluate the biomass and accumulation of copper (Cu) and cadmium (Cd) of plant species grown in contaminated soil and their biological and physical effects on the soil. In co-contaminated soils with copper (Cu) and cadmium (Cd), a three-year field experiment was conducted by planting four plant species in the co-contaminated acidic soil treated with hydroxyapatite. The four species produced different amounts of biomass in this order: Pennisetum sp. > Elsholtzia splendens > Setaria lutescens > Sedum plumbizincicola . Over three growing seasons, the best accumulators of Cu and Cd were Elsholtzia splendens and Sedum plumbizincicola , respectively. Overall, Pennisetum sp. was the best species for Cu and Cd removal when biomass was considered. The four plant treatments could improve the content of >0.25 mm mechanically stable (DR _(0.25) ) and water-stable (WR _(0.25) ) aggregates and significantly improve the aggregate mean mass diameter (MWD) and the geometric mean diameter (GMD). The largest increase was with the treatment of Pennisetum sinese , while the fractal dimension (FD) of mechanically stable aggregates could be significantly reduced by the treatment of Pennisetum sp. Hydroxyapatite and phytoremediation could improve the soil enzyme activity, and Elsholtzia splendens had the best effect in this respect. This study will provide a better understanding of the remediation of heavy metal contaminated soil.
机译：植物化是一种用于修复重金属污染的土壤的潜在成本效益的技术。该方法用于评估污染土壤中生长的植物物种的铜（Cu）和镉（CD）的生物质和积累及其对土壤的生物和物理影响。在具有铜（Cu）和镉（CD）的共污染土壤中，通过在用羟基磷灰石处理的共污染酸性土壤中种植四种植物物种进行三年的田间实验。四种物种以此顺序产生了不同量的生物质：Pennisetum sp。 > elsholtzia splendens> setaria lutescens> sedum plumbizincicola。在三个不断增长的季节，Cu和Cd的最佳蓄能器分别是elsholtzia splendens和sedum plumbizincola。总的来说，Pennisetum sp。当考虑生物质时，是否是Cu和Cd去除的最佳物种。四种植物治疗可以改善机械稳定的> 0.25mm的含量（DR _（0.25））和水稳定（WR _（0.25））聚集并显着改善总体平均直径（MWD）和几何平均直径（ GMD）。最大的增加是对彭尼斯坦的治疗，而通过Pennisetum Sp的治疗可以显着降低机械稳定的聚集体的分形维度（FD）。羟基磷灰石和植物修复可以改善土壤酶活性，elsholtzia splendens在这方面具有最佳效果。本研究将更好地了解重金属污染土壤的修复。

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