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Environmental research
Academic Press
Environmental research

Academic Press

0013-9351

Environmental research/Journal Environmental researchSCIAHCIISTPEI
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    Correlation between trace element concentrations in the blood of female hawksbill (Eretmochelys imbricata) and egg quality in nesting populations of Sao Tome Island

    Ines F.C. MoraoTiago SimoesRoger B. CasadoSara Vieira...
    121594.1-121594.15页
    查看更多>>摘要:Metals and metalloids can pose a significant threat to sea turtles, as these contaminants tend to accumulate in their bodies over time, due to their long lifespans and varied feeding habits. Sao Tome and Principe's archipelago hosts the last remaining rookery for hawksbill sea turtles {Eretmochelys imbricata) in the region. The study aimed to determine the levels of metals and metalloids accumulated by this population and to investigate their possible genotoxicity in nesting females' blood as well as potential effects on their eggs in terms of morphometric characteristics and the quality of their lipidic reserves, essential for embryo development. Higher levels of Hg were found to be correlated with increased "lobed-shaped nuclei" in erythrocytic count, suggesting genotoxicity effects in this population. Higher levels of Se were correlated with thicker and heavier eggshells, while Pb levels were associated with the reduction of the egg's diameter. Metal contamination in females' blood significantly affected yolk polar fatty acids. Significant negative correlations were found between general metal contamination (PLI) and saturated fatty acids (SFA), while positive correlations were observed for essential omega-6 fatty acids (n6), mostly influenced by Cu, Fe, and Hg concentrations. This suggests that these omega-6 fatty acids are being synthesized from SFA, potentially indicating stress response by metal exposure. The present results point to some potential alterations in the normal embryonic development of these turtle eggs, influenced by metal contamination, which should raise some concerns about the future of this critically endangered species and call for additional conservation efforts in the region.

    Environmental impact assessment of waste plastic modified asphalt mixtures: VOCs emission characteristics, environmental-health risks, and underlying mechanism

    Dechen JiangZhilong CaoBochao ZhouGuanyu Gong...
    121642.1-121642.10页
    查看更多>>摘要:Incorporating waste plastics into asphalt mixtures offers dual benefits of enhancing performance and reducing white pollution, while also necessitating consideration of their environmental impact. This work quantitatively investigated the effects of waste high-density polyethylene (wHDPE), polyvinyl chloride (wPVC), and polypropylene (wPP) plastics on volatile organic compounds (VOCs) emissions and associated environmental-health risks of asphalt mixtures prepared via the dry method under simulated paving conditions, with mechanistic insights into the impacts. Results revealed that waste plastics could improve high-temperature and water stability. Meanwhile, these selected waste plastics can effectively reduce the total VOCs concentrations of asphalt mixture, with a maximum inhibition rate of 36.72 % by wPP. Alkanes and aldehydes (81.41 % of total VOCs) were decreased by over 30 %. Meanwhile, wPP was the most effective in reducing environmental and health impacts, achieving up to 39.7 %, 33 %, and 27.7 % inhibition of ozone formation potential, secondary organic aerosol formation potential, and cancer risk, respectively. However, the addition of wPVC and high-dose wHDPE increased hazardous emissions such as benzene series and halogenated hydrocarbons due to thermal degradation under high temperature. These findings underscore the importance of waste plastic type/dosage optimization to address performance-environmental trade-offs, providing valuable guidance for sustainable waste plastic reuse in road engineering.

    Biochar-assisted control of antibiotic-resistant bacteria and methane yield optimization in two-stage anaerobic digestion under organic load and antibiotic stress

    Jingyi YouMohamed FarghaliGen YoshidaHanari Yamamoto...
    121679.1-121679.14页
    查看更多>>摘要:This study explores the interactions between microbial communities, antibiotic resistance, and biogas production in anaerobic digestion systems, focusing on the acidogenic (AP) and methanogenic (MP) phases under varying organic loads, cefazolin (CEZ) exposure, and biochar supplementation. High organic loading (10 g/L glucose) significantly suppressed CEZ-resistant bacteria (CEZ-r) during the AP phase. However, their abundance markedly rebounded in MP, rising from 0.30 % to 36.28 % in control, indicating phase-specific dynamics. CEZ residues increased CEZ-r by 2.49 % and 9.30 % at 0 and 5 g/L glucose during AP. Although AP suppressed CEZ-r to 0.23 % in the CEZ-added reactor at 10 g/L glucose, MP rebounded CEZ-r to 8.30 %. In addition, CEZ exposure reduced methane yields by up to 28.14 %, likely due to the suppression of Methanosaetaceae and impaired acetic acid conversion. In contrast, biochar addition effectively reduced CEZ-r abundance to below 1.00 % at moderate to high organic loads and alleviated CEZ-induced inhibition on methane production. Biochar also enhanced Methanosaetaceae abundance (up to +6.55 %) compared to the control and promoted more efficient substrate utilization, possibly by facilitating direct interspecies electron transfer. These findings emphasize the role of organic load and digestion phase in shaping antibiotic resistance and system performance. Furthermore, biochar addition effectively mitigates the negative impacts of antibiotic residues, stabilizes microbial communities, and enhances biogas production.

    Light-driven directional decomposition of ammonia nitrogen coupled with proton migration for efficient hydrogen production

    Changqing YangXifei ZhouWanli LiChaohai Wei...
    121692.1-121692.10页
    查看更多>>摘要:The targeted construction of coupled systems, utilizing the unique features of combined photocatalytic redox reactions, is an effective strategy for enhancing catalytic performance. However, the hydrogen source in photocatalytic ammonia-nitrogen oxidation-coupled systems and the multi-electron proton migration pathways in such synergistic systems remain rarely studied. In this study, MoS_2/UiOS-MCS composites were synthesized for the photocatalytic conversion of ammonia-nitrogen wastewater into hydrogen. The edge hydrogen evolution effect of MoS_2 and the type-Ⅱ heterojunction formed between both UiO-66-(SH)_2 and MnCdS effectively facilitated the separation and transfer of photogenerated charge carriers. The composites exhibited a synergistic hydrogen production rate of 787.42 μmol g~(-1) h~(-1), 22 times higher than that of pure MCS, and the nitrogen selectivity is 99.05 %. In situ EPR and controlled experiments identified ·NH_2 as the intermediate product; Isotope tracing experiments revealed that the protons in hydrogen primarily originate from water, while protons from ammonia nitrogen are transported from the oxidation site to the reduction site. The mechanisms of ammonia nitrogen oxidation, proton transport pathways between reaction sites, and their contributions to hydrogen evolution were elucidated, and new insights were provided for designing photocatalytic synergistic systems and optimizing photocatalyst performance.

    The current and future temperature-related mortality burden of cause-specific kidney diseases: A national case-crossover study in China

    Mengen GuoJinlei QiGuanhao HeJiangmei Liu...
    121696.1-121696.9页
    查看更多>>摘要:Background: Many studies have investigated the association of temperature with non-accidental mortality, but there is limited evidence on the temperature-related mortality burden of kidney diseases. This study aims to assess the mortality impact of temperatures on cause-specific kidney in China. Methods: We conducted a time-stratified case-crossover study using mortality data from kidney diseases across 2790 counties/districts in China from 2003 to 2022. We used conditional logistic regression in conjunction with distribution lag nonlinear model (DLNM) to examine the association between temperature and kidney disease mortality. Furthermore, we projected the mortality burden of kidney diseases attributed to temperature under diverse climate change scenarios in China in the future. Results: The study included 914,177 kidney disease fatalities, revealing an inversely J-shaped association between temperature and kidney disease mortality across various subgroups. Both extreme cold (Odds ratios [OR] = 1.34, 95 % CI: 1.27-1.41) and extreme heat (1.06, 95 % CI: 1.02-1.10) were linked to increased kidney mortality, with a more pronounced effect in females [1.08(95 % CI: 1.02-1.14) for extreme heat, 1.34(95 % CI: 1.24-1.46) for extreme cold], the elderly [1.07(95 % CI: 1.03-1.12) for extreme heat, 1.35(95 % CI: 1.26-1.45) for extreme cold ] and those with acute kidney disease [1.10(95 % CI: 0.96-1.26)] for extreme heat, 1.43(95 % CI: 1.19-1.73) for extreme cold]. Nationwide, temperatures accounted for 9.28 % (95 % CI: 9.17 %-9.40 %) of kidney disease mortality, with 9.15 % (95 % CI: 9.03 %-9.26 %) for cold and 0.13 % (95 % CI: 0.12 %-0.14 %) for heat, and temperature-related AF of acute kidney disease was the greatest (attributable fraction [AF] = 11.00 %,95 %CI:10.71 %-11.31 %). Projections suggest that temperature-related AFs would rise from 11.39 % (95 % CI: 8.19 %-13.89 %) in the 2050s to 15.26 % (95 % CI: 10.30 %-18.68 %) in the 2090s under SSP5-8.5, with heat-related AFs increasing from 2.82 % (95 % CI: 1.8 %-4.20 %) to 7.12 % (95 % CI: 4.23 %-10.09 %) and cold-related AFs decreasing from 8.57 % (95 % CI: 5.71 %-9.89 %) to 8.14 % (95 % CI: 5.22 %-8.81 %). Conclusion: Our study indicates that temperatures are significantly associated with the mortality risk and burden of kidney diseases in China, and temperature-related mortality is expected to increase in the future, particularly from heat. Our findings indicate that kidney diseases are vulnerable to ambient temperature in the context of climate change.

    Greenspace proximity in relation to sleep health among a racially and ethnically diverse cohort of US women

    Symielle A. GastonMarina SweeneyShubhangi PatelViniece Jennings...
    121698.1-121698.14页
    查看更多>>摘要:Sleep is essential for overall health. Greenspace may contribute to sleep health through, for instance, improving mood, reducing sleep disruptors (e.g., poor air quality), and promoting physical activity. Although greenspace likely differs across populations, few studies have included diverse populations. To investigate greenspace-sleep health associations, overall and by age, race and ethnicity, and socioeconomic status, we used data collected at enrollment (2003-2009) from women in the Sister Study (n = 1612 Hispanic/ Latina, n = 4421 non-Hispanic (NH)-Black, and n = 41,657 NH-White). Participants' geocoded home addresses were linked to NASA's Moderate Resolution Imaging Spectroradiometer Normalized Difference Vegetation Index data (250m resolution) to capture greenspace tertiles (further categorized as low/moderate vs. high). Participants reported seven sleep dimensions, which we assessed individually, along with a multidimensional sleep health measure (categories: favorable, moderate, poor). Adjusting for individual- and environmental/ neighborhood-level characteristics, we used Poisson regression with robust variance to estimate prevalence ratios and 95 % confidence intervals (PR[CI]). We tested for interaction and estimated age-, race and ethnicity-, and educational attainment category-specific associations. Among participants (mean ± SD age = 55.7 ± 9.0 years), those with low/moderate vs. high greenspace had a lower prevalence of favorable sleep (58 % vs. 66 %). After adjustment, low/moderate vs. high greenspace was associated with a 32 % higher prevalence of moderate (PR = 1.32 [1.27-1.38]) and 12 % higher prevalence of poor (PR = 1.12 [1.07-1.16]) vs. favorable sleep health. Magnitudes of associations were higher among NH-White women vs. minoritized racial-ethnic groups and women with higher vs. lower educational attainment. Higher greenspace was associated with favorable sleep, with stronger associations among groups with more social advantages.

    Rheological properties of food waste and micron-scale particle strategies for enhancing mixing performance in anaerobic digestion: Insights into rheology and numerical simulation

    Xu XingZongsheng LiChenzhi HeYanyan Guo...
    121699.1-121699.12页
    查看更多>>摘要:The rheological properties of food waste (FW) have emerged as a pivotal bottleneck impeding the stable operation and mixing performance of anaerobic digestion systems. This work systematically evaluated the rheological properties of FW and integrated computational fluid dynamics (CFD) numerical simulation to investigate the mixing performance of high-solid FW with micron-scale particle sizes. Results demonstrated that typical FW exhibited shear-thinning characteristics, and the rheological behavior of high-solid FW aligned with the Herschel-Bulkley model. The investigation of influencing factors indicated that reducing total solids, increasing temperature, and decreasing particle size could substantially decrease FW viscosity. Simultaneously, organic components exerted significant regulatory effects on the rheological properties. Starch and animal proteins markedly enhanced the viscosity and consistency, while lipids and legume proteins decreased viscosity and enhanced fluidity. A quantitative relationship between the consistency coefficient and organic components of FW was established. CFD simulations revealed that micron-sized particles effectively improved flow field distribution, reducing the dead zone ratio by 3.7 % and lowering the UI from 0.673 to 0.608. This work investigated the rheological properties of FW and the mixing performance of anaerobic digestion systems from a rheological perspective. The aim is to overcome efficiency and stability bottlenecks, thereby offering engineering guidance for optimizing anaerobic digestion processes and enhancing the resource recovery of municipal solid waste.

    Prenatal exposure to manganese and objectively measured sleep disturbances in early childhood

    Francheska M. Merced-NievesElena ColicinoBrent CoullSonali Bose...
    121707.1-121707.8页
    查看更多>>摘要:Inadequate sleep in childhood can impact long-term neurodevelopmental outcomes; thus, identifying modifiable risk factors amenable to intervention is a priority. Development of sleep neuroarchitecture begins in utero. Manganese (Mn) is a trace element known to be both an essential element for optimal neurodevelopment and, at insufficient or excess levels, a neurotoxicant. We examined associations between prenatal urinary Mn levels and objectively measured sleep outcomes in children aged 6.7 ± 2.0 years and explored sex-specific effects. Sleep was assessed using multi-day actigraphy (n = 222) and single-night in-home polysomnography (PSG) (n = 102). Linear and non-linear associations between prenatal log-transformed Mn levels and sleep outcomes were examined using multivariable linear regression and generalized additive models, respectively. Non-linear associations were examined based on low, moderate (referent group) and high Mn levels indexed by tertiles. Sex-specific effects were evaluated using 2-way interaction terms. A doubling increase in Mn was associated with a 30.9 min (95 % CI = -52.0, -9.86) decrease of average sleep period duration and a 21.9 min (95 % CI = -39.9, -4.02) decrease of average sleep duration on actigraphy; associations were more pronounced in males. Compared to children born to mothers with moderate prenatal urinary Mn levels, children whose mothers had "low" Mn had a percent increase in minutes of wake after sleep onset (WASO) (p = 89.6; 95 % CI = 16.2, 206.5) and a decrease in sleep efficiency percentage (p = -6.47; 95 % CI = -11.3, -1.68) on PSG. Sleep problems may be influenced by environmental exposures, such as metals, and disruption can occur as early as pregnancy.

    Prenatal PFAS exposure and outcomes related to maternal gut microbiome composition in later pregnancy

    Stephanie MorganSayed Hassan Raza ShahSarah S. ComstockJaclyn M. Goodrich...
    121709.1-121709.20页
    查看更多>>摘要:The composition of the gut microbiome is dependent on factors including diet, lifestyle, and exposure to environmental chemicals, and has implications for human health. Per- and polyfluoroalkyl substances (PFAS), a class of man-made chemicals that have nonstick and flame-retardant properties may impact on gut microbiome composition. Our objective was to elucidate links between PFAS and maternal gut microbiome composition in two geographically diverse sites of the Environmental Influences on Child Health Outcomes program. The present analysis includes participants in the Atlanta African American Maternal Child Cohort; ATL AA and a predominately non-Hispanic White subsample of the Michigan Archive for Research on Child Health Cohort; MARCH with serum or plasma PFAS concentrations measured in early or late pregnancy and 16s rRNA sequencing from maternal gut microbiome samples available primarily in later pregnancy (2nd-3rd trimester). Linear regression models tested associations between prenatal PFAS levels (separately for the 1st/3rd trimesters) and measures of alpha diversity, bacterial composition differences, and differential taxonomic abundance. Bayesian Kernel Machine Regression and Elastic net regression mixture modeling were also incorporated. In both cohorts, multiple PFAS were significantly associated with the relative abundance of specific microbiome taxa even after adjustment for covariates including maternal diet, age, race, BMI, and smoking; A total of 16 significant family-level associations were identified for ATL AA (e.g., PFOA with Clostridiaceae; natural log fold change = 0.94) and 13 significant family-level associations identified for MARCH e.g., PFOS with Desulfovi-brionaceae; natural log fold change = -1.53 (P_(FDR)<0.05), but similarities between cohorts were lacking. Mixture analyses did not identify interactive or combined effects but did provide modest evidence of inclusion of individual PFAS in beta diversity models in both cohorts. In 2 distinct cohorts, there were significant associations between prenatal PFAS and the relative abundance of several bacterial taxa, but these differences were cohort-specific. This work suggests that PFAS may modulate the gut microbiome during pregnancy.

    Optimized bacterial consortium-based strategies for bioremediation of PAHs-contaminated soils: insights into microbial communities, and functional responses

    Jianli JiaBen ZhangAoran LiWeiran Wang...
    121718.1-121718.12页
    查看更多>>摘要:Microbial technologies hold great promise for in situ remediation of polycyclic aromatic hydrocarbons (PAHs)-contaminated soils. However, the selection of enhancement measures and corresponding remediation strategies remains insufficiently understood. In this study, a series of enhancement treatments, including bacterial consortium inoculation (comprising Achromobacter denitrificans BP1, Rhodococcus aetherivorans BW2, and Lysiniba-cillus sp. BS3), nutrient addition, and bio-ventilation, were implemented to develop effective in situ remediation strategies for PAHs-contaminated soil. Over a 60-day incubation, the enhancement treatments achieved phen-anthrene (PHE) degradation efficiencies of 68.0-94.7 % and benzo[a]pyrene (BaP) degradation efficiencies of 12.9-82.4 %. Degradation rates across soil layers followed the pattern: upper layer > lower layer > middle layer. Enhancement treatments significantly boosted soil dehydrogenase (DH) and fluorescein diacetate (FDAH) activities. Among these, the sequential consortium inoculation with nutrient addition treatment (T6) demonstrated the highest degradation efficacy. In the treatment T6, the relative abundance of consortium genera was significantly increased, playing critical roles in PAHs degradation. The connectivity and stability of the soil bacterial network were enhanced, providing greater resilience to pollutants. Quantitative PCR analysis showed that the enhancement strategy increased RHDα-GN gene abundance by 1.98-fold at the initial and maintained a positive correlation with PAHs residues throughout the process (p < 0.05), and the phe gene exhibited a continuous upward trend during remediation, ultimately reaching 1.61-1.96 times its initial abundance. Overall, this study provides a strong candidate of integrated enhancement strategies to advance in situ bioremediation of PAH-contaminated sites.