粘土对污染土壤中潜在有毒元素组分的影响

IF 1.7 4区农林科学 Q4 SOIL SCIENCE

Soil and Water Research Pub Date : 2020-12-11 DOI:10.17221/13/2020-SWR

Kateřina Vejvodová, O. Drábek, C. Ash, V. Tejnecký, K. Němeček, L. Borůvka

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引用次数: 2

摘要

本研究的目的是评估粘土作为一种改良剂对降低潜在有毒元素(pte)的移动性和植物可利用性的影响。以9%的施肥率在库特纳霍拉污染的园林土中添加高岭石和蛭石。将一半的原始土壤加入HNO3酸化，观察pH值对pte吸附的影响。在8周的时间内对样品进行了4次分析，以评估粘土添加对As、Cd、Pb和Zn植物有效性以及不同组分BCR顺序萃取的影响。结果表明，pte主要通过黏土矿物边缘的离子/阳离子交换结合到土壤中的Fe/Mn氧化物和有机组分上。pH对PTE的植物有效性有显著影响(P < 0.05)，尤其是As和Cd。块状和粉状的蛭石对As、Cd和Pb的植物有效性有显著影响，而对Zn的植物有效性有相反影响。

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Effect of clay on the fractions of potentially toxic elements in contaminated soil

The aim of the study was to evaluate the effect of clay as an amendment to decrease the mobility and plant availability of potentially toxic elements (PTEs). Kaolinite and vermiculite were added at a 9% application rate to a contaminated garden soil from Kutná Hora. Half of the original soil was acidified by the addition of HNO3, to observe the effect of the pH on the adsorption of the PTEs. The samples were analysed four times over an eight-week period to evaluate the effect of the clay additions on the As, Cd, Pb and Zn plant availability and different fractions of the BCR sequential extraction. The results indicate that the PTEs were mainly bound by ion/cation exchange on the edges of the clay minerals and onto the Fe/Mn oxides and organic fractions in the soils. The significance (P < 0.05) of the pH was observed for the plant availability of the PTE, especially on the As and Cd. A comparison of the vermiculite in the form of chunks and as powder displayed the most statistically significant results, where the vermiculite powder significantly decreased the plant availability of the As, Cd and Pb, while the opposite effect was observed for the Zn.

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来源期刊

Soil and Water Research Water resources, Soil Science, Agriculture-WATER RESOURCES

CiteScore

4.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An international peer-reviewed journal published under the auspices of the Czech Academy of Agricultural Sciences and financed by the Ministry of Agriculture of the Czech Republic. Published since 2006. Thematic: original papers, short communications and critical reviews from all fields of science and engineering related to soil and water and their interactions in natural and man-modified landscapes, with a particular focus on agricultural land use. The fields encompassed include, but are not limited to, the basic and applied soil science, soil hydrology, irrigation and drainage of lands, hydrology, management and revitalisation of small water streams and small water reservoirs, including fishponds, soil erosion research and control, drought and flood control, wetland restoration and protection, surface and ground water protection in therms of their quantity and quality.