Co-application of nanosized halloysite and biochar as soil amendments in aided phytostabilization of metal(-oid)s-contaminated soil under different temperature conditions. (February 2022)

• Record Type: Journal Article
• Authors: Radziemska, Maja; Gusiatin, Zygmunt M.; Kumar, Vinod; Brtnicky, Martin
• Is Part Of: Chemosphere. Volume 288:Part 1(2022)
• Publication Date: 2022-02
• Subjects: Aided phytostabilization -- Immobilization -- Nanoremediation -- Soil risk minimization -- Freeze-thaw cycle; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2021.132452
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: The threat posed by the degradation of the soil environment by metal (-oid)s has been lead to the improvement of existing or search for new remediation methods; in this case, the application of environmentally friendly nanomaterials falls into this trend. The study applied a technique of aided phytostabilization for the immobilization of metal (-oid)s in soil with the application of nanosized halloysite and biochar (nBH), along with Lolium perenne L. Its effectiveness was assessed in terms of changing temperature conditions (16 cycles of freeze and thaw cycles, (FTC)) on the content of As, Cu, Pb and Zn in the soil, roots, and above-ground parts of the tested plant, chemical fraction distributions of metal (-oid)s and their stability (based on reduced partition index, Ir ). The biomass yield in nBH-amended soil was 2-fold higher compared to control soil, but it decreased by 1.6-fold after FTC. nBH facilitated more bioaccumulation of As, Pb and Zn than Cu in plant roots, before than after FTC. nBH increased pH in phytostabilized soil, but it was not affected by changing FTC. In soil nBH-phytostabilized total concentration of metal (-oid)s significantly decreased compared to control soil, for As and Cu below permissible value, regardless of FTC. Soil amendment and changing temperature conditions affected metal (-oid)s redistribution in soil. As a result, the stability of As increased from 0.50 to 0.66, Cu from 0.49 to 0.52, Pb from 0.36 to 0.48 and Zn from 0.39 to 0.47. These findings suggest that nBH can immobilize metal (-oid)s in phytostabilized soil under changing temperature conditions. Graphical abstract: Image 1 Highlights: Nanosized halloysite and biochar (nBH) as amendment for soil phytostabilization (80 characters with spaces). Phytostabilized soil subjected to 16 freeze-thaw cycles (FTC) (62 characters with spaces). NBH and FTC affect biomass yield, metal (-oid)s bioaccumulation and stability (77 characters with spaces). As and Cu concentration below permissible value in soil phytostabilized with nBH (81 characters with spaces). NBH with repeated FTC facilitated stability of As, Cu and Pb in soil (68 characters with spaces).