Effect of glauconite-containing wastes obtained during phosphorite enrichment on lead mobility in soils-Reference-Cited by-同舟云学术

Effect of glauconite-containing wastes obtained during phosphorite enrichment on lead mobility in soils

Published:2022-11-13 Issue:3 Volume: Page:350-360
ISSN:2541-8963
Container-title:Povolzhskiy Journal of Ecology
language:
Short-container-title:Povolžskij èkologičeskij žurnal

Author:

Syrchina N. V.¹^ORCID,Pilip L. V.²^ORCID,Ashikhmina T. Ya.³^ORCID,Kantor G. Ya.³^ORCID

Affiliation:

1. Vyatka State University

2. Vyatka State Agrotechnological University

3. Vyatka State University; Institute of Biology of Komi Science Centre of the Ural Branch of RAS

Abstract

Lead (plumbum, Pb) is a toxic element of the first hazard class. Global soil pollution with Pb leads to severe consequences for the environment and human health. Mobile Pb forms represent a special environmental danger. To immobilize Pb in soils, various materials (meliorants) are used which can convert it into some form poorly soluble in water and weak acids. The search for safe natural materials for the rehabilitation of contaminated soils is of great practical importance. Glauconite-containing phosphorite tailings (PT) are promising reclamation materials. The main component of PT, glauconite, is a natural sorbent capable of binding heavy metals. The composition of PT also includes small-fraction phosphorites, clay and calcareous components, and quartz. The effect of PT on lead mobility in soil was studied in laboratory conditions. Four variants of loamy soil with various chemical structures were used. The lead content in different soil samples did not differ statistically significantly from each other. The effect of PT on lead mobility was evaluated in comparison with limestone. The meliorants were introduced in a dosage of 1 g / kg. The use of PT led to active Pb immobilization in acidic organic–depleted soils, while lime did so in neutral highly humus soils. Mathematical processing of our experimental results suggests that the formation of sedentary complexes with organic matter and adsorption of lead on glauconite serves the predominant mechanism of binding Pb in soil when using lime and PT, respectively. The introduction of PT causes a decrease in the Pb mobility, as well as the enrichment of the soil with phosphorus, potassium, sulfur, calcium and trace elements contained in this meliorant. This is important for restoring the fertility of degraded lands.

Publisher

A.N.Severtsov Institute of Ecology and Evolution RAS - IEE RAS

Subject

Ecology,Ecology, Evolution, Behavior and Systematics

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