Application of humic substances in the remediation of heavy-metal-polluted soils of the Subarctic Zone of the Kola Peninsula

Tregubova, Polina; Копцик, Г. Н.; Степанов, А. А.; Smirnova, I. E.; Kadulin, M. S.; Turbaevskaya, V. V.; Zakharenko, A. I.

doi:10.3103/s0147687417050064

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Soil pH was determined using an acidity meter (HI98160, HANNA, USA) (water to soil ratio of 2.5:1), and soil organic matter (SOM) was determined by the potassium dichromate volumetric method [19]. Humic acid (HA) was determined by the NaOH and Na 4 P 2 O 7 solution extraction and K 2 CrO 4 solution oxidation methods [20]. Total phosphorus (P) was determined by the sulfuric acid–perchloric acid digestion–molybdenum blue colorimetric methods [21].…”

Section: Methodsmentioning

confidence: 99%

Enrichments of Cadmium and Arsenic and Their Effects on the Karst Forest Area

Wang

Bai

Liu

et al. 2019

IJERPH

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An understanding of the enrichment mechanisms of cadmium (Cd) and arsenic (As) in the process of rock weathering and soil formation is essential to develop agriculture according to local conditions. However, the enrichments of soil Cd and As under natural background conditions in karst areas are still uncertain. The enrichment factor, geo-accumulation index, redundancy analysis, and other methods were used to analyze the enrichment degree and the influencing factors of Cd and As on 5 rock–soil profiles and 15 topsoil samples, which were collected from a karst forest area in Libo County, Guizhou Province. The results showed that the enrichment process was divided into three stages. In the first stage, Cd and As were enriched in carbonate rocks, and their mean concentrations were 1.65 and 3.9 times those of the corresponding abundance of the crust. In the second stage, the enrichment of the parent rock into the soil, the enrichment factors of Cd and As in the parent material horizon relative to the bedrock horizon were 9.2 and 2.82, respectively. The third stage refers to the enrichments of Cd and As in the topsoil, where Cd enrichment was more obvious than that of As. Soil organic matter (SOM) and phosphorus (P) are important factors that influenced the enrichments of Cd and As in the topsoil. The functional groups of SOM were complexed with Cd and As; P easily formed precipitates with Cd, and the tree litter was fed back to the topsoil, which may be the reason for the surface enrichment of Cd and As. This study will help the scientific community understand the enrichment mechanisms of soil Cd and As in karst areas.

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Section: Methodsmentioning

confidence: 99%

Enrichments of Cadmium and Arsenic and Their Effects on the Karst Forest Area

Wang

Bai

Liu

et al. 2019

IJERPH

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“…In respect to plants, both stimulating and inhibiting effects of HPs are illustrated in some comprehensive reviews (Canellas and Olivares, 2014;Rose et al, 2014;Nardi et al, 2016;Shah et al, 2018). At the same time, HPs may be promising remediation agents to degraded lands, due their ability to improve physical, chemical and biological properties of soil (Piccolo and Stevenson, 1982;Khaled and Fawy, 2011;Tregubova et al, 2017).…”

Section: Introductionmentioning

confidence: 99%