Soil & Environmental Health最新文献

Risk assessment based on Cr, Mn, Co, Ni, Cu, Zn, Ba, Pb, and Sc contents in soils and blood Pb levels in children: Seasonable variations and Monte Carlo simulations

Soil & Environmental Health

Pub Date : 2025-01-20 DOI: 10.1016/j.seh.2025.100131

He Shen , Xiaoping Li , Jie Dong , Xueming Zheng , Yueheng Jiang , Pengyuan Jin , Xuelian Kui , Huimin Liu , Xu Zhang , Xiangyang Yan

Potentially toxic metals (PTMs) in soil pose threats and hazards to human health. Their seasonal variations were observed and thus their risks. However, limited research was conducted based on the seasonal variations of soil PTMs and children's blood lead levels (BLLs). In this study, seasonable variations of PTM risks (Cr, Mn, Co, Ni, Cu, Zn, Ba, and Pb) and 0–6 years old children's BLLs were investigated based on 534 Xi'an seasonable soils (spring, summer and winter) and Monte Carlo simulations. The results indicate that the distributions of PTMs and risks depended on seasonas. The highest Mn, Cr, Cu, and Pb contents appeared in the winter, which were 785, 148, 146, and 134 mg/kg, respectively. Pollution load index ranged 1.14–1.15, while ecological risk index was 30.6–30.9. Further, non-carcinogenic risk for Pb was 2.27–2.36 × 10⁻², Zn was 8.10–8.73 × 10⁻⁴ and Cu was 1.89–1.94 × 10⁻². PTM contamination was slightly higher in the winter compared to spring and summer. Although PTMs posed mild pollution and acceptable risk, seasonal variations affected children's BLLs, particularly in the winter. The Zn, Cu, and Pb from automobile emissions were identified as the most significant source and priority contaminants in Xi'an, with blood Pb levels being slightly higher in winter at 3.24–3.39 μg/dL. This study highlights the importance of developing targeted strategies to mitigate Pb risks in urban areas, particularly addressing seasonal variations, to reduce children's BLLs effectively.

{"title":"Risk assessment based on Cr, Mn, Co, Ni, Cu, Zn, Ba, Pb, and Sc contents in soils and blood Pb levels in children: Seasonable variations and Monte Carlo simulations","authors":"He Shen , Xiaoping Li , Jie Dong , Xueming Zheng , Yueheng Jiang , Pengyuan Jin , Xuelian Kui , Huimin Liu , Xu Zhang , Xiangyang Yan","doi":"10.1016/j.seh.2025.100131","DOIUrl":"10.1016/j.seh.2025.100131","url":null,"abstract":"<div><div>Potentially toxic metals (PTMs) in soil pose threats and hazards to human health. Their seasonal variations were observed and thus their risks. However, limited research was conducted based on the seasonal variations of soil PTMs and children's blood lead levels (BLLs). In this study, seasonable variations of PTM risks (Cr, Mn, Co, Ni, Cu, Zn, Ba, and Pb) and 0–6 years old children's BLLs were investigated based on 534 Xi'an seasonable soils (spring, summer and winter) and Monte Carlo simulations. The results indicate that the distributions of PTMs and risks depended on seasonas. The highest Mn, Cr, Cu, and Pb contents appeared in the winter, which were 785, 148, 146, and 134 mg/kg, respectively. Pollution load index ranged 1.14–1.15, while ecological risk index was 30.6–30.9. Further, non-carcinogenic risk for Pb was 2.27–2.36 × 10<sup>−2</sup>, Zn was 8.10–8.73 × 10<sup>−4</sup> and Cu was 1.89–1.94 × 10<sup>−2</sup>. PTM contamination was slightly higher in the winter compared to spring and summer. Although PTMs posed mild pollution and acceptable risk, seasonal variations affected children's BLLs, particularly in the winter. The Zn, Cu, and Pb from automobile emissions were identified as the most significant source and priority contaminants in Xi'an, with blood Pb levels being slightly higher in winter at 3.24–3.39 μg/dL. This study highlights the importance of developing targeted strategies to mitigate Pb risks in urban areas, particularly addressing seasonal variations, to reduce children's BLLs effectively.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 2","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the quality and reputation of Soil & Environmental Health journal: 2025 updates

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2025.100128

Lena Q. Ma , Kashif Hayat , Maria Manzoor , Jing Wang , Eakalak Khan , Mary Beth Kirkham

引用次数: 0

Risks and benefits associated with urban green space through the lens of environmental justice

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2024.100127

Sally L. Brown , Ganga M. Hettiarachchi

A number of factors contribute to concerns on environmental justice in urban areas. These include a lack of green space, poor access to healthy fruits and vegetables, and high exposure to environmental contaminants. Access to soils with low contaminant bioaccessibility is critical to addressing these concerns. This is complicated due to conflicting guidance on what constitutes safe soil and how to improve the quality of urban soils. This review details the basics of the hazards associated with two ubiquitous urban contaminants: Pb and PAHs. The literature on significant exposure pathways and potential bioavailability of these contaminants is discussed. Guidance and regulatory values for both Pb and PAHs are shown and vary widely. Soil concentrations of these contaminants are often exceed regulatory values. Data from studies on urban soils for contaminant concentrations and availability reduction are presented. Use of organic amendments including compost- and biosolids-based soil products, along with gardening in raised beds are acceptable practices for growing food in potentially-contaminated soils. Yield increases associated with their use has been reported. The feedstocks for these amendments are readily available in all urban areas. Because these amendments typically have lower concentrations of contaminants than urban soils, their use will decrease total concentrations of contaminants and has been shown to improve soil and ecosystem health. Bioaccessible fractions of contaminants may also be reduced. Thus, these amendments appear to be a way to safely and productively increase urban green space. In addition, the use of residual-based soil amendments will result in additional environmental benefits due to waste diversion from landfills.

{"title":"Risks and benefits associated with urban green space through the lens of environmental justice","authors":"Sally L. Brown , Ganga M. Hettiarachchi","doi":"10.1016/j.seh.2024.100127","DOIUrl":"10.1016/j.seh.2024.100127","url":null,"abstract":"<div><div>A number of factors contribute to concerns on environmental justice in urban areas. These include a lack of green space, poor access to healthy fruits and vegetables, and high exposure to environmental contaminants. Access to soils with low contaminant bioaccessibility is critical to addressing these concerns. This is complicated due to conflicting guidance on what constitutes safe soil and how to improve the quality of urban soils. This review details the basics of the hazards associated with two ubiquitous urban contaminants: Pb and PAHs. The literature on significant exposure pathways and potential bioavailability of these contaminants is discussed. Guidance and regulatory values for both Pb and PAHs are shown and vary widely. Soil concentrations of these contaminants are often exceed regulatory values. Data from studies on urban soils for contaminant concentrations and availability reduction are presented. Use of organic amendments including compost- and biosolids-based soil products, along with gardening in raised beds are acceptable practices for growing food in potentially-contaminated soils. Yield increases associated with their use has been reported. The feedstocks for these amendments are readily available in all urban areas. Because these amendments typically have lower concentrations of contaminants than urban soils, their use will decrease total concentrations of contaminants and has been shown to improve soil and ecosystem health. Bioaccessible fractions of contaminants may also be reduced. Thus, these amendments appear to be a way to safely and productively increase urban green space. In addition, the use of residual-based soil amendments will result in additional environmental benefits due to waste diversion from landfills.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling sorption and dissipation kinetics of ciprofloxacin and enrofloxacin antibiotics in New Zealand pastoral soils

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2024.100125

Rafael Marques Pereira Leal , Ajit K. Sarmah

Fluoroquinolones are a class of widely used antibiotics for veterinary purposes and are known to have moderate to high persistence in soil and aquatic bodies, leading to their bioaccumulation in the environment. Studies on their environmental fate are absent for New Zealand soils, which often receive animal waste effluent including poultry litter. Laboratory studies were performed to evaluate the sorption and dissipation behavior of two fluoroquinolones (ciprofloxacin and enrofloxacin) in three New Zealand pastoral soils with and without poultry litter amendment at low and high levels (1 and 5%, w/w). Results of the batch sorption studies suggest that isotherms were best described by Freundlich model, Freundlich coefficients for the compounds varied from 312 to 62,163 g^1−N L^N kg⁻¹ in the soils, with cation exchange being the dominant sorption mechanism. Addition of poultry litter (5%, w/w) decreased the sorption affinity of fluoroquinolones to soils, which was mainly related to pH-induced changes in compound speciation. Results of incubation studies performed under aerobic conditions show that dissipation half-life was highly variable (15–378 days). A dehydrogenase assay performed as an indicative of microbial activity during incubation studies indicates that despite lower microbial activity, dissipation was faster in subsoils (30–40 cm), attributing to higher compound bioavailability due to lower sorption ability of the subsoils. Augmenting poultry litter (5%, w/w) increased dissipation, due to a combination of lower sorption and higher microbial activity. High sorption in New Zealand soils may reduce fluoroquinolone's toxicity to exposed terrestrial organisms. However, high persistence may represent a relevant antibiotic reservoir in a long term, posing risks to terrestrial and aquatic ecosystem health and thus warranting further elucidation.

{"title":"Modelling sorption and dissipation kinetics of ciprofloxacin and enrofloxacin antibiotics in New Zealand pastoral soils","authors":"Rafael Marques Pereira Leal , Ajit K. Sarmah","doi":"10.1016/j.seh.2024.100125","DOIUrl":"10.1016/j.seh.2024.100125","url":null,"abstract":"<div><div>Fluoroquinolones are a class of widely used antibiotics for veterinary purposes and are known to have moderate to high persistence in soil and aquatic bodies, leading to their bioaccumulation in the environment. Studies on their environmental fate are absent for New Zealand soils, which often receive animal waste effluent including poultry litter. Laboratory studies were performed to evaluate the sorption and dissipation behavior of two fluoroquinolones (ciprofloxacin and enrofloxacin) in three New Zealand pastoral soils with and without poultry litter amendment at low and high levels (1 and 5%, w/w). Results of the batch sorption studies suggest that isotherms were best described by Freundlich model, Freundlich coefficients for the compounds varied from 312 to 62,163 g<sup>1−N</sup> L<sup>N</sup> kg<sup>−1</sup> in the soils, with cation exchange being the dominant sorption mechanism. Addition of poultry litter (5%, w/w) decreased the sorption affinity of fluoroquinolones to soils, which was mainly related to pH-induced changes in compound speciation. Results of incubation studies performed under aerobic conditions show that dissipation half-life was highly variable (15–378 days). A dehydrogenase assay performed as an indicative of microbial activity during incubation studies indicates that despite lower microbial activity, dissipation was faster in subsoils (30–40 cm), attributing to higher compound bioavailability due to lower sorption ability of the subsoils. Augmenting poultry litter (5%, w/w) increased dissipation, due to a combination of lower sorption and higher microbial activity. High sorption in New Zealand soils may reduce fluoroquinolone's toxicity to exposed terrestrial organisms. However, high persistence may represent a relevant antibiotic reservoir in a long term, posing risks to terrestrial and aquatic ecosystem health and thus warranting further elucidation.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100125"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling soil organic carbon content using mid-infrared absorbance spectra and a nonnegative MCR-ALS analysis

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2024.100123

Mikhail Borisover , Marcos Lado , Guy J. Levy

A new approach based on mid-IR absorbance spectra is proposed for modeling total organic carbon (TOC) content in soils. This approach involves a first-time bilinear decomposition of soil mid-IR absorbance spectra using nonnegative multivariate curve resolution (MCR) with an alternating least square (ALS) algorithm. An MCR-ALS-derived component signifies a chemically meaningful combination of soil constituents. This new mechanistic model has been developed to link the soil composition, expressed in terms of ratios of MCR-ALS-based concentration scores of the identified components, to soil TOC value. Nonnegative MCR-ALS decomposition, performed for 213 mid-IR absorbance spectra of soil samples collected in the north and south of Israel, yielded four components. Fitting the mechanistic model-derived TOC to the experimental TOC values exhibited a TOC content threshold that affected model performance. TOC content <1.0 % w w⁻¹ was represented by the root mean square deviation of 0.18% with 62% of the variance being explained, whereas for larger TOC values, a sharp decline in model performance was observed. The existence of this TOC threshold in determining model performance suggested that successful TOC modeling (below 1%) could be indirect and related to IR spectral fingerprints of minerals binding soil organic matter (SOM) and forming organo-mineral complexes. Thus, a SOM fraction having weak interactions with soil minerals was poorly accounted for in some soil samples. The dependency of the model performance on soil TOC contents suggests that it might be possible to differentiate between soil samples based on their different dominating SOM pools, mineral-associated ones and those having weak interactions with minerals. Further studies, especially in soils with high SOM content, are needed to validate our findings.

{"title":"Modeling soil organic carbon content using mid-infrared absorbance spectra and a nonnegative MCR-ALS analysis","authors":"Mikhail Borisover , Marcos Lado , Guy J. Levy","doi":"10.1016/j.seh.2024.100123","DOIUrl":"10.1016/j.seh.2024.100123","url":null,"abstract":"<div><div>A new approach based on mid-IR absorbance spectra is proposed for modeling total organic carbon (TOC) content in soils. This approach involves a first-time bilinear decomposition of soil mid-IR absorbance spectra using nonnegative multivariate curve resolution (MCR) with an alternating least square (ALS) algorithm. An MCR-ALS-derived component signifies a chemically meaningful combination of soil constituents. This new mechanistic model has been developed to link the soil composition, expressed in terms of ratios of MCR-ALS-based concentration scores of the identified components, to soil TOC value. Nonnegative MCR-ALS decomposition, performed for 213 mid-IR absorbance spectra of soil samples collected in the north and south of Israel, yielded four components. Fitting the mechanistic model-derived TOC to the experimental TOC values exhibited a TOC content threshold that affected model performance. TOC content <1.0 % w w<sup>−1</sup> was represented by the root mean square deviation of 0.18% with 62% of the variance being explained, whereas for larger TOC values, a sharp decline in model performance was observed. The existence of this TOC threshold in determining model performance suggested that successful TOC modeling (below 1%) could be indirect and related to IR spectral fingerprints of minerals binding soil organic matter (SOM) and forming organo-mineral complexes. Thus, a SOM fraction having weak interactions with soil minerals was poorly accounted for in some soil samples. The dependency of the model performance on soil TOC contents suggests that it might be possible to differentiate between soil samples based on their different dominating SOM pools, mineral-associated ones and those having weak interactions with minerals. Further studies, especially in soils with high SOM content, are needed to validate our findings.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100123"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unravelling the effects of climate change on the soil-plant-atmosphere interactions: A critical review

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2025.100130

Maria Nahin Oishy, Nigar Ahmmad Shemonty, Sadia Islam Fatema, Sadika Mahbub, Ebadunnahar Lukhna Mim, Maimuna Binte Hasan Raisa, Amit Hasan Anik

The soil-plant-atmosphere nexus is vital in terrestrial ecosystems, featuring complex feedback loops that link soil, plant, and atmospheric processes. This review analyzes the significant impacts of climate change on the soil-plant-atmosphere nexus, focusing on soil degradation, plant physiological responses, and atmospheric alterations. This comprehensive review aims to integrate current research, evaluate interdependent feedback mechanisms, and highlight the gaps in understanding the system's resilience under climatic stressors. A systematic literature analysis was done by focusing on 1) soil-plant-atmosphere nexus, 2) climate change impacts on soil dynamics, 3) climate stressors and plant responses, and 4) soil-plant-atmosphere feedback mechanisms, with specific criteria for data on extreme weather events, changed nutrient cycles, and CO₂-related alterations and temperature-related changes. Key findings reveal that climate-induced disruptions such as altered precipitation, increased temperatures, and extreme weather events weaken soil structure, damage nutrient cycling, and modify plant growth, thereby threatening agricultural productivity and ecosystem stability. Elevated CO₂ enhances photosynthesis but is counterbalanced by nutrient limitations and phenological mismatches affecting biodiversity. Feedback loops, such as those driven by decreased carbon sequestration and increased greenhouse gas emissions, amplify these effects. The review emphasizes the urgency of integrated mitigation and adaptation strategies, including the adoption of climate-resilient agricultural practices, urban green infrastructure, and renewable energy technologies.

{"title":"Unravelling the effects of climate change on the soil-plant-atmosphere interactions: A critical review","authors":"Maria Nahin Oishy, Nigar Ahmmad Shemonty, Sadia Islam Fatema, Sadika Mahbub, Ebadunnahar Lukhna Mim, Maimuna Binte Hasan Raisa, Amit Hasan Anik","doi":"10.1016/j.seh.2025.100130","DOIUrl":"10.1016/j.seh.2025.100130","url":null,"abstract":"<div><div>The soil-plant-atmosphere nexus is vital in terrestrial ecosystems, featuring complex feedback loops that link soil, plant, and atmospheric processes. This review analyzes the significant impacts of climate change on the soil-plant-atmosphere nexus, focusing on soil degradation, plant physiological responses, and atmospheric alterations. This comprehensive review aims to integrate current research, evaluate interdependent feedback mechanisms, and highlight the gaps in understanding the system's resilience under climatic stressors. A systematic literature analysis was done by focusing on 1) soil-plant-atmosphere nexus, 2) climate change impacts on soil dynamics, 3) climate stressors and plant responses, and 4) soil-plant-atmosphere feedback mechanisms, with specific criteria for data on extreme weather events, changed nutrient cycles, and CO<sub>2</sub>-related alterations and temperature-related changes. Key findings reveal that climate-induced disruptions such as altered precipitation, increased temperatures, and extreme weather events weaken soil structure, damage nutrient cycling, and modify plant growth, thereby threatening agricultural productivity and ecosystem stability. Elevated CO<sub>2</sub> enhances photosynthesis but is counterbalanced by nutrient limitations and phenological mismatches affecting biodiversity. Feedback loops, such as those driven by decreased carbon sequestration and increased greenhouse gas emissions, amplify these effects. The review emphasizes the urgency of integrated mitigation and adaptation strategies, including the adoption of climate-resilient agricultural practices, urban green infrastructure, and renewable energy technologies.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100130"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advances in bioremediation strategies for PFAS-contaminated water and soil

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2024.100126

Ayushman Bhattacharya , Jesna Fathima , Sunith Varghese , Pritha Chatterjee , Venkataramana Gadhamshetty

Per- and poly-fluoroalkyl substances (PFAS) are emerging contaminants, posing adverse impacts on water and soils due to their persistence, chemical transformations, and bioaccumulation. With over 15,000 different PFAS compounds being identified globally, their toxic effects and half-life spanning from 72 h to 8.5 years in humans are a serious concern. Bioremediation has emerged as an environmentally-friendly and cost-effective approach for PFAS degradation. However, there is still limited understanding of PFAS interactions with microorganisms and the roles of promising microbes in transforming PFAS into non-toxic end products. The knowledge about biotransformation of PFAS is essential to ameliorate the adaptation of microorganisms to local matrix and environment as well as to strengthen the natural enzymatic pathways and activities at a commercial scale, which is a major challenge. This review aims to address these gaps by providing a comprehensive analysis of recent developments in the bioremediation of PFAS-contaminated soil and water systems. The review focuses on the capabilities of phytoremediation, bioelectrochemical systems, and microbial species, including bacteria, fungi, and microalgae. Additionally, this study offers an in-depth overview of PFAS sources, their physicochemical characteristics, and their environmental fate and transport. Furthermore, it examines microbial metabolic activity, the formation of degradation intermediates, the role of co-metabolism, and the behaviour of microorganisms under PFAS stress as well as highlights future research directions. The key findings from this review include: 1) microbial community composition, field application, presence of co-substrate and cationic complexation govern biotransformation and fate of PFAS, 2) long chain PFAS are more susceptible to accumulate in the roots due to high hydrophobicity, and 3) algae-bacteria symbiotic relationships reduce microalgae growth inhibition and stimulates PFAS removal. Overall, this review emphasizes the potential of bioprocesses for large-scale PFAS bioremediation, contributing to environmental protection and mitigating the risks associated with PFAS contamination.

{"title":"Advances in bioremediation strategies for PFAS-contaminated water and soil","authors":"Ayushman Bhattacharya , Jesna Fathima , Sunith Varghese , Pritha Chatterjee , Venkataramana Gadhamshetty","doi":"10.1016/j.seh.2024.100126","DOIUrl":"10.1016/j.seh.2024.100126","url":null,"abstract":"<div><div>Per- and poly-fluoroalkyl substances (PFAS) are emerging contaminants, posing adverse impacts on water and soils due to their persistence, chemical transformations, and bioaccumulation. With over 15,000 different PFAS compounds being identified globally, their toxic effects and half-life spanning from 72 h to 8.5 years in humans are a serious concern. Bioremediation has emerged as an environmentally-friendly and cost-effective approach for PFAS degradation. However, there is still limited understanding of PFAS interactions with microorganisms and the roles of promising microbes in transforming PFAS into non-toxic end products. The knowledge about biotransformation of PFAS is essential to ameliorate the adaptation of microorganisms to local matrix and environment as well as to strengthen the natural enzymatic pathways and activities at a commercial scale, which is a major challenge. This review aims to address these gaps by providing a comprehensive analysis of recent developments in the bioremediation of PFAS-contaminated soil and water systems. The review focuses on the capabilities of phytoremediation, bioelectrochemical systems, and microbial species, including bacteria, fungi, and microalgae. Additionally, this study offers an in-depth overview of PFAS sources, their physicochemical characteristics, and their environmental fate and transport. Furthermore, it examines microbial metabolic activity, the formation of degradation intermediates, the role of co-metabolism, and the behaviour of microorganisms under PFAS stress as well as highlights future research directions. The key findings from this review include: 1) microbial community composition, field application, presence of co-substrate and cationic complexation govern biotransformation and fate of PFAS, 2) long chain PFAS are more susceptible to accumulate in the roots due to high hydrophobicity, and 3) algae-bacteria symbiotic relationships reduce microalgae growth inhibition and stimulates PFAS removal. Overall, this review emphasizes the potential of bioprocesses for large-scale PFAS bioremediation, contributing to environmental protection and mitigating the risks associated with PFAS contamination.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc and cadmium release from soil aggregate of different size fractions during repeated phytoextraction with Sedum plumbizincicola: Insight from stable isotope analysis

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2025.100129

Jiawen Zhou , Jingqi Dong , Rebekah E.T. Moore , Mark Rehkämper , Katharina Kreissig , Barry Coles , Ting Gao , Peter Christie , Longhua Wu

Studies based on metal isotope changes at micro-scale interfaces within soils (i.e., between aggregates of different size fractions) can provide further insight into soil-plant interactions during long-term phytoextraction. Here, aggregate size separation was conducted on two contaminated soils that underwent phytoextraction using Zn/Cd hyperaccumulator Sedum plumbizincicola over six consecutive seasons. The dynamic changes in Zn and Cd concentrations, chemical fractionations and isotope compositions in soil aggregates were investigated. As phytoextraction proceeded from the first (C1) to the sixth (C6) season, shoot Zn displayed a marginally heavier isotope composition despite the essentially constant Zn isotope composition of bulk soils and the 50–250, 5–50, 1–5, and <1 μm aggregate size fractions. Most likely, this results from moderate depletion of Zn in the bulk soils (by ≤ 21%) and gradual release of heavy Zn isotopes into soil bioavailable pool due to soil acidification and Zn exchange during repeated phytoextraction. Light isotopes of Cd were significantly enriched in all aggregates of different size fractions (Δ^114/110Cd_C6–_C1 = −0.14 ± 0.04 to −0.02 ± 0.04‰) with similar decreases in Cd concentrations (50–64% and 87–92% in two soils) over the five consecutive seasons. Rayleigh modelling produced similar Cd isotope fractionation factors for aggregates of different size fractions, indicating that similar mechanisms controlled Cd release from soil aggregates. In contrast to other plants preferring light Cd isotopes, Zn/Cd hyperaccumulator continuously took up heavier Cd isotopes from soils. The results were due to the enhanced root exudation to mobilize more Cd from soil solids and organic ligands excreted from roots preferentially complexed heavy Cd isotopes based on density functional theory. The different isotopic behaviours of Zn and Cd suggest different processes controlling their migration in the soil-plant system.

{"title":"Zinc and cadmium release from soil aggregate of different size fractions during repeated phytoextraction with Sedum plumbizincicola: Insight from stable isotope analysis","authors":"Jiawen Zhou , Jingqi Dong , Rebekah E.T. Moore , Mark Rehkämper , Katharina Kreissig , Barry Coles , Ting Gao , Peter Christie , Longhua Wu","doi":"10.1016/j.seh.2025.100129","DOIUrl":"10.1016/j.seh.2025.100129","url":null,"abstract":"<div><div>Studies based on metal isotope changes at micro-scale interfaces within soils (i.e., between aggregates of different size fractions) can provide further insight into soil-plant interactions during long-term phytoextraction. Here, aggregate size separation was conducted on two contaminated soils that underwent phytoextraction using Zn/Cd hyperaccumulator <em>Sedum plumbizincicola</em> over six consecutive seasons. The dynamic changes in Zn and Cd concentrations, chemical fractionations and isotope compositions in soil aggregates were investigated. As phytoextraction proceeded from the first (C1) to the sixth (C6) season, shoot Zn displayed a marginally heavier isotope composition despite the essentially constant Zn isotope composition of bulk soils and the 50–250, 5–50, 1–5, and <1 μm aggregate size fractions. Most likely, this results from moderate depletion of Zn in the bulk soils (by ≤ 21%) and gradual release of heavy Zn isotopes into soil bioavailable pool due to soil acidification and Zn exchange during repeated phytoextraction. Light isotopes of Cd were significantly enriched in all aggregates of different size fractions (Δ<sup>114/110</sup>Cd<sub>C6</sub>–<sub>C1</sub> = −0.14 ± 0.04 to −0.02 ± 0.04‰) with similar decreases in Cd concentrations (50–64% and 87–92% in two soils) over the five consecutive seasons. Rayleigh modelling produced similar Cd isotope fractionation factors for aggregates of different size fractions, indicating that similar mechanisms controlled Cd release from soil aggregates. In contrast to other plants preferring light Cd isotopes, Zn/Cd hyperaccumulator continuously took up heavier Cd isotopes from soils. The results were due to the enhanced root exudation to mobilize more Cd from soil solids and organic ligands excreted from roots preferentially complexed heavy Cd isotopes based on density functional theory. The different isotopic behaviours of Zn and Cd suggest different processes controlling their migration in the soil-plant system.</div></div>","PeriodicalId":94356,"journal":{"name":"Soil & Environmental Health","volume":"3 1","pages":"Article 100129"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143096277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stabilization of As and Sb in contaminated acidic shooting range soil with apatite mine tailings: Challenge of co-contamination

Soil & Environmental Health

Pub Date : 2025-01-01 DOI: 10.1016/j.seh.2024.100124

Salla H. Venäläinen , Aura Nousiainen , Minna Silvennoinen , Sanna Kanerva

Differences in the behaviors of shot-derived metal Pb and metalloids Sb and As render the remediation of metal(loid)-contaminated shooting range soils challenging. Treatment methods that generally reduce Pb solubility may simultaneously increase Sb and As solubility due to pH changes and ion competition. We investigated the potential of tailings from phosphate mining, previously used to immobilize Pb, to stabilize acidic shooting range soil without incurring the risk of enhanced Sb and As solubility. In a 2.5-year field trial, the soil of a former shooting range, surface-treated with tailings consisting of phlogopite, carbonate minerals calcite and dolomite, and residues of apatite, displayed no evidence of increased Sb or As solubility. Results from a parallel laboratory-scale pot experiment, carried out with test soils from the field site, supported the findings. Under acidic conditions, dissolution of the carbonate fraction of the tailings, and the subsequent decrease in soil acidity, contributed to the release of Sb and As from organic associations and/or Al/ Fe (hydr)oxide surfaces. We concluded that the abundant Ca²⁺ ions liberated upon carbonate dissolution probably reacted with the anionic species of Sb and As to form sparingly soluble Ca-antimonates and Ca-arsenates. Moreover, the solubility of intrinsic and apatite-derived P in the test soils, initially hypothesized to compete for adsorption with Sb and As and thereby increase their solubility, also decreased after tailings treatment. In conclusion, Pb-contaminated shooting range soil was successfully stabilized with the tailings without increasing Sb or As solubility.

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引用次数: 0

Water-stable aggregation and organic matter stabilisation by native plant Acacia auriculiformis in an early Technosol eco-engineered from Fe-ore tailings 由铁矿尾矿生态工程早期技术溶胶中的本地植物金合欢的水稳聚集和有机物稳定作用

Soil & Environmental Health

Pub Date : 2024-10-18 DOI: 10.1016/j.seh.2024.100115

Zhen Li , Songlin Wu , Yunjia Liu , Lars Thomsen , Fang You , Junjian Wang , Yuanfang Huang , Longbin Huang

Ecological engineering of Fe-ore tailings into Technosols (or soil-like growth media) offers a promising way to rehabilitate tailings without resorting to natural topsoil from other places. Among key pedogenic processes, soil aggregate formation and organic matter (OM) stabilisation are critical to the development of sustainable Technosols. The colonisation of pioneer plant species highly adaptive to infertile soils and water deficit may act as competent biological drivers to enhance these critical processes involved in Technosol formation. This study aimed to investigate the role of an Australian native plant species, Acacia auriculiformis, in enhancing water-stable aggregate formation and associated OM stabilisation using a pot experiment under glasshouse conditions. The influences of two relevant abiotic processes, including water deficit and phosphorus deficiency, on these key processes were evaluated. A. auriculiformis colonisation enhanced the formation of water-stable aggregates in the early Technosols, while the proportion of macroaggregates and microaggregates were altered differently, with the former increasing under well-watered conditions and the latter increasing under water deficit conditions. A. auriculiformis colonisation increased N-rich mineral-associated OM within the macroaggregates. In aggregates, OM stabilisation was related to interactions of carboxyl-rich organic groups with tailing minerals. The influences of water deficit and phosphorus deficiency on aggregate formation and OM stabilisation were mediated via their impacts on the growth and root functions of A. auriculiformis, including root extension, entanglement, and exudation. From these findings, the utilisation of A. auriculiformis is recommended as a biological driver to facilitate the development of early Technosols from eco-engineered Fe-ore tailings.

将铁矿尾矿转化为 Technosols（或类似土壤的生长介质）的生态工程为尾矿的恢复提供了一种前景广阔的方法，而无需从其他地方获取天然表土。在关键的成土过程中，土壤团聚体的形成和有机质（OM）的稳定对可持续 Technosols 的发展至关重要。对贫瘠土壤和缺水具有高度适应性的先驱植物物种的定植可能会成为促进这些涉及技术溶胶形成的关键过程的有效生物驱动力。本研究旨在通过玻璃温室条件下的盆栽实验，研究澳大利亚本土植物物种金合欢在促进水稳聚合体形成和相关 OM 稳定方面的作用。评估了两个相关非生物过程（包括缺水和缺磷）对这些关键过程的影响。A. auriculiformis 的定殖增强了早期技术溶胶中水稳定聚合体的形成，而大聚合体和微聚合体的比例发生了不同的变化，前者在水分充足的条件下增加，后者在缺水条件下增加。A. auriculiformis 的定殖增加了大团聚体中富含 N 的矿质 OM。在聚集体中，OM 的稳定与富含羧基的有机基团与尾矿的相互作用有关。缺水和缺磷对聚合体形成和 OM 稳定性的影响是通过它们对 A. auriculiformis 的生长和根系功能（包括根系延伸、缠绕和渗出）的影响来介导的。根据这些研究结果，建议将金合欢作为一种生物驱动力来利用生态工程化铁矿尾矿开发早期技术溶胶。

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引用次数: 0