Experimental study on different phytoremediation of heavy metal pollution in HDS sediment of copper mines

IF 3.9 2区农林科学 Q1 AGRONOMY Plant and Soil Pub Date : 2024-08-17 DOI:10.1007/s11104-024-06886-2

Zhuyu Zhao, Ruoyan Cai, Jinchun Xue, Li Tan, Chuanliang Yan

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Abstract

Aims

HDS sediment is a type of solid waste produced when the high-concentration mud method (HDS) is adopted to treat acid wastewater from copper mines. It can rationally utilize sediment resources by using phytoremediation, which plays a role in the ecological restoration of mines.

Methods

To reveal the effect of different phytoremediation on the heavy metal, enrichment capacity and microbial diversity of the HDS sediments of copper mines, in this experiment, the HDS sediments of a copper mine without phytoremediation were selected as the control group, while the sediments of black locust (Robinia pseudoacacia), slash pine (Pinus elliottii Engelmann) and Chinese white poplar (Populus tomentosa Carr.) were used as test groups to analyze the physical and chemical properties, heavy metal pollution and bioaccumulation capacity of HDS sediments under three phytoremediation.

Results

The results show that different phytoremediation can reduce the sediment's conductivity and adjust the sediment’s pH value to the range suitable for plant growth. The BCF_Shoot and BTF values of Chinese white poplar to Cd and Zn and slash pine to Pb were both greater than 1.

Conclusions

As discovered from the bioconcentration coefficient and biotransport coefficient results, Chinese white poplar is a Cd-enriched and Zn-enriched plant, while slash pine is a Pb-enriched plant.

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铜矿 HDS 沉积物中重金属污染的不同植物修复实验研究

目的HDS沉积物是采用高浓度泥浆法（HDS）处理铜矿酸性废水时产生的一种固体废弃物。利用植物修复技术可合理利用沉积物资源，对矿山生态修复起到一定作用。方法为了揭示不同植物修复方法对铜矿 HDS 沉积物重金属、富集能力和微生物多样性的影响，本实验选取未进行植物修复的某铜矿 HDS 沉积物作为对照组，以黑刺槐（Robinia pseudoacacia）、斜纹松（Pinus elliottii Engelmann）和白杨（Populus tomentosa Carr.结果表明，不同的植物修复方法可以降低沉积物的电导率，并将沉积物的 pH 值调节到适合植物生长的范围。结论从生物富集系数和生物传输系数结果可以看出，白杨是富集镉和锌的植物，而油松是富集铅的植物。

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.