Remediation of antimony-arsenic co-contaminated soils in mining areas: Synergistic interaction of amendments and plants affects soil Sb and As bioavailability, nutrient and enzyme activity

Environmental Technology & Innovation, Journal Year: 2025, Volume and Issue: unknown, P. 104185 - 104185

Published: April 1, 2025

Language: Английский

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Silicon-iron modified biochar remediates cadmium and arsenic co-contaminated paddy soil by regulating cadmium and arsenic speciation

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: April 11, 2025

Silicon-iron-modified biochars (SMBCs) were produced to remediate paddy soil contaminated with both cadmium (Cd) and arsenic (As). This study explored the effects of SMBCs on transformation Cd As species in associated responses functional genes elucidate remediation mechanisms. Three silicon-iron modified utilized. (i) Silicon dioxide magnetic biochar (SMBC1), (ii) Calcium silicate (SMBC2), (iii) Sodium (SMBC3) applied soil. increased pH concentration dissolved organic carbon (DOC) by 0.42-0.54 units 6.6-16.39%, respectively. SMBC treatments reduced bioavailable concentrations 29.09-73.63% 1.67-8.37%, respectively, transforming As(III) into less toxic As(V) stabilizing soluble a more inert residual form. Compared control, significantly 2.94-16.17% (p < 0.05) 11.42-26.07% 0.05). Adding calcium (CaSiO3) at mass ratio 5% resulted 0.79 mg·kg-1 (an increase 16.86%) an 37.89 mg·kg-1. enhanced porosity, microbial aioA genes, sulfate-reducing bacteria, facilitating oxidation As(III). Magnetic amended (SMBC2) demonstrated superior efficacy addressing co-contamination As. The mechanisms include following: decrease (DOC), gene activity, promoting As(V), dissimilatory sulfite reductase beta subunit (DsrB) reduction sulfate ion (SO4 2-) sulfide (S2-), leading formation (CdS) precipitates additional precipitation involving Fe. These results highlight potential silicate-modified as effective additive for co-contaminated soils, providing insights heavy metals' stabilization

Language: Английский

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Combination of magnesium and iron nanoparticles with biochar mitigated salt toxicity and altered antioxidant activity and essential oil production of chamomile

International Journal of Phytoremediation, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 12

Published: April 30, 2025

This research was conducted in a greenhouse to examine the effects of solid biochar (25 g kg-1 soil), and biochar-based nanoparticles magnesium (BNP-MgO), iron (BNP-Fe3O4), + (BNP-MgO BNP-Fe3O4) comparison with control (soil) on German chamomile (Matricaria chamomilla L.) under salinity levels (0.9, 6, 12 dS m-1 as non-saline treatment moderate high salinities, respectively). Salinity increased sodium uptake, generation reactive oxygen species enzymatic non-enzymatic antioxidant activities, leading reduction leaf nutrients pigments, organs masses. High significantly decreased essential oil percentage yield. However, especially enriched biochars BNP-MgO, BNP-Fe3O4, their combined form reduced hydrogen peroxide consequently activities saline conditions. The BNP-MgO best for enhancing BNP-Fe3O4 generally choice improving masses yield salinity. Therefore, biochars, due excellent physicochemical properties, were suggested suitable soil amendments mitigate salt toxicity improve growth production medicinal plants field cultivations.

Language: Английский

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Effects of Phytostabilized Zinc Sulfide Nanocomposites on Growth and Arsenic Accumulation in Wheat (Triticum aestivum L.) under Arsenic Stress

Plant Stress, Journal Year: 2025, Volume and Issue: unknown, P. 100886 - 100886

Published: May 1, 2025

Language: Английский

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