Non-lethal sampling of phalanges for heavy metal bioaccumulation in Pelophylax nigromaculatus from historical mercury mining areas in Southwestern China DOI Creative Commons
Xiaodong Zhang, Zhihong Lu, Chen Fen

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 28, 2024

The Wanshan mercury mining area (WMMA) in Guizhou Province, China, has been identified as a region at high ecological risk owing to heavy metal contamination. This study employed non-lethal sampling methods, using the phalanges of Pelophylax nigromaculatus WMMA analytical material. Ten (metalloid) elements were selected for analysis, including Hg, Cr, Mn, Ni, Cu, Zn, Cd, Pb, As, and Se. These measured inductively coupled plasma mass spectrometry (ICP-MS), while Hg was determined atomic fluorescence (AFS). bioaccumulation characteristics metals P. analyzed through factor (BAF), extent pollution along with potential assessed index (RI). scaled (SMI) utilized evaluate body condition nigromaculatus. Additionally, combination Spearman correlation analysis non-negative matrix factorization (NMF) identify sources contributions elements. results indicated that distribution varied. Except concentrations essential trace significantly higher than those non-essential soil found be low, whereas exposure from water high. presence poses significant nigromaculatus, As primary contributors this risk. environmental follows: Se mainly originated sources; Cd primarily came atmospheric Cr Cu natural activities Mn Ni had multiple composite sources. Although negatively impacted physical no differences SMI observed across different regions. We believe is attributable levels Se, which effectively mitigate toxicity metals. demonstrated frog assessment are simple, safe, can serve useful indicators help pollutants.

Language: Английский

Changes in Soil C, N, and P Concentrations and Stocks after Caatinga Natural Regeneration of Degraded Pasture Areas in the Brazilian Semiarid Region DOI Open Access
Luiz Filipe dos Santos Silva, Luiz Guilherme Medeiros Pessoa, Emanuelle Maria da Silva

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(20), P. 8737 - 8737

Published: Oct. 10, 2024

The conversion of caatinga vegetation areas into pastures in the Brazilian semiarid region has depleted soil fertility due to degradation. natural regeneration been alternative adopted restore fertility. However, real effectiveness this practice recovering organic carbon (SOC) and nutrient stocks is unknown. This work evaluated effect on restoration levels SOC, N, P as a strategy maintain sustainability environment. We collected samples every 5 cm, up 20 cm deep, degraded pasture, (10 years), regenerated (35 years) evaluate P. depth significantly affects Stocks were higher > regenerating pasture. increased by 115%, 110%, 117%, respectively, compared Although 35 years improved fertility, remain low.

Language: Английский

Citations

1
Combination Mechanism of Soil Dissolved Organic Matter and Cu2+ in Vegetable Fields, Forests and Dry Farmland in Lujiang County DOI Creative Commons
Youru Yao,

Jingyi Zhang,

Kang Ma

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(5), P. 684 - 684

Published: April 27, 2024

Dissolved organic matter (DOM) serves as a critical link in the migration and transformation of heavy metals at soil–solid interface, influencing behaviour processes Cu2+ soil. There have been studies on combination mechanisms between DOM paddy soils. However, adsorption/complexation redox other agricultural soil types (such dry farmland vegetable fields) are unclear. In order to reveal process with Cu different dynamic changes chemical that occur, this study analysed variability components structure three soils using three-dimensional fluorescence spectroscopy X-ray photoelectron spectroscopy. addition, priority compounds change relation valence state Lujiang County, Anhui Province, was revealed based laboratory experiments. The results showed composition mainly composed humic-like fulvic-like substances clear terrestrial origin high degree decomposition characteristics. indicated is humic fulvic acid-like substances, they obvious characteristics origin. complex stability constants (lgKM) follow forest land (lgKM = 5.21), 4.90), 4.88). lgKM 4.51) 4.39). Humic combine preferentially Cu2+, showing stronger chelating affinity than substances. complexes include hydroxyl, phenolic hydroxyl amino functional groups included DOM, accompanied by reactions. comparison farmland, fields undergoes more intense reactions simultaneously chelation Cu2+. Therefore, application fertilisers may lead uncertainties concerning fate variable valence. These contribute deeper understanding interaction

Language: Английский

Citations

1
Abatement Effects of Agricultural Non-Point Pollution from Land System Reforms: A Case Study of the Farmland “Three Rights Separation” Reform in China DOI Creative Commons

YU Dai-song,

Xiao Hai, Zixuan Wang

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(6), P. 927 - 927

Published: June 12, 2024

At present, agricultural non-point source pollution has become the main of water pollution, which mainly comes from excessive use chemicals such as pesticides and fertilizers. The TRS is another land system reform in China after household contract responsibility system, relaxes management rights rural clarifies ownership land. Using this a case study, paper constructs panel data for 30 provinces to explore impact tenure intensification on using difference-in-difference (DID) model identify causal relationship between two. results show that coefficient policy variable −4.056 at 1% significance level, indicating round suppressed pollution. have implemented seen an average annual reduction 405,600 tons Agnps emissions compared those not TRS, scale operation agriculture size economy act two paths. Moreover, heterogeneity analysis shows effect non-major food-producing areas smaller than major areas, path realization also different. Therefore, we should continue encourage large-scale operations, cultivate new business entities, strengthen inhibitory

Language: Английский

Citations

1
Wild boar grubbing affects soil carbon quantity and fractions under native, reforested and planted vegetation DOI
Pasquale Napoletano, Valeria Maselli, Maria Buglione

et al.

CATENA, Journal Year: 2024, Volume and Issue: 249, P. 108648 - 108648

Published: Dec. 10, 2024

Language: Английский

Citations

1
Combined Application of Multiple Global Change Factors Negatively Influences Key Soil Processes across an Urban Gradient in Berlin, Germany DOI Creative Commons
Peter Meidl, Daniel R. Lammel, Vladan Nikolić

et al.

Soil Systems, Journal Year: 2024, Volume and Issue: 8(3), P. 96 - 96

Published: Aug. 31, 2024

Urbanization is a growing phenomenon affecting soils worldwide. Urban centers have been highlighted as hotspots for global change factors due to heightened anthropogenic activity. However, few studies investigated the multifaceted impacts of (GCFs) acting in concert with urban soils. Thus, objective this study was add GCFs different combinations (0, 1, 2, 5, and 8 simultaneously) three high-urbanity low-urbanity Berlin evaluate their effects on soil parameters functions. We hypothesized four potential outcomes process responses GCF exposure, Site-Specific Resistance, General Susceptibility, Low-Urbanity High-Urbanity Resistance. provide evidence negative individual multiple application litter decomposition, water repellency, water-stable aggregates. Additionally, we highlight Susceptibility decomposition exposure regardless urbanity, well Resistance repellency aggregates under increased GCFs. This expands threat settings highlights some consequences regarding function.

Language: Английский

Citations

0
Driving factors of molybdenum (Mo) bioconcentration in maize in the Longitudinal Range–Gorge Region of Southwestern China DOI
Zhiliang Wu,

Qingye Hou,

Zhongfang Yang

et al.

Environmental Geochemistry and Health, Journal Year: 2024, Volume and Issue: 46(12)

Published: Nov. 7, 2024

Language: Английский

Citations

0
Non-lethal sampling of phalanges for heavy metal bioaccumulation in Pelophylax nigromaculatus from historical mercury mining areas in Southwestern China DOI Creative Commons
Xiaodong Zhang, Zhihong Lu, Chen Fen

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Dec. 28, 2024

The Wanshan mercury mining area (WMMA) in Guizhou Province, China, has been identified as a region at high ecological risk owing to heavy metal contamination. This study employed non-lethal sampling methods, using the phalanges of Pelophylax nigromaculatus WMMA analytical material. Ten (metalloid) elements were selected for analysis, including Hg, Cr, Mn, Ni, Cu, Zn, Cd, Pb, As, and Se. These measured inductively coupled plasma mass spectrometry (ICP-MS), while Hg was determined atomic fluorescence (AFS). bioaccumulation characteristics metals P. analyzed through factor (BAF), extent pollution along with potential assessed index (RI). scaled (SMI) utilized evaluate body condition nigromaculatus. Additionally, combination Spearman correlation analysis non-negative matrix factorization (NMF) identify sources contributions elements. results indicated that distribution varied. Except concentrations essential trace significantly higher than those non-essential soil found be low, whereas exposure from water high. presence poses significant nigromaculatus, As primary contributors this risk. environmental follows: Se mainly originated sources; Cd primarily came atmospheric Cr Cu natural activities Mn Ni had multiple composite sources. Although negatively impacted physical no differences SMI observed across different regions. We believe is attributable levels Se, which effectively mitigate toxicity metals. demonstrated frog assessment are simple, safe, can serve useful indicators help pollutants.

Language: Английский

Citations

0