24年12月15日文献情报（11篇）

24年12月15日文献情报

1. 题目: Calcium-organic matter fouling in nanofiltration: Synchrotron-based X-ray fluorescence and absorption near-edge structure spectroscopy for speciation

文章编号: N24121511
期刊: Water Research
作者: Tyler A Malkoske, Yang-Hui Cai, Sharon E Bone, Andrea I Schäfer
更新时间: 2024-12-15
摘要: Calcium (Ca)-enhanced organic matter (OM) fouling of nanofiltration (NF) membranes leads to reduced flux during desalination and requires frequent cleaning. Fouling mechanisms are not fully understood, which limits the development of targeted fouling control methods. This study employed synchrotron-based X-ray fluorescence (XRF) and X-ray absorption near-edge structure (XANES) spectroscopy to quantify the spatial distribution and mass of Ca deposition as well as changes in the Ca coordination environment characteristic of specific fouling mechanisms, respectively. Bench-scale filtration experiments were performed using feed solutions containing Ca and ten different types of organic matter (OM), as well as the common scalants, calcium carbonate (CaCO₃) and calcium sulfate (CaSO₄). Osmotic backwash (OB) was performed at regular intervals for fouling control. Ca-OM aggregation resulted in greater flux decline and lower flux recovery during OB than Ca conditioning of membranes followed by filtration of feed solution with OM. Linear combination fitting (LCF) of XANES absorption spectra from fouled membranes indicated that Ca-OM aggregation preferentially occurred for OM types that exhibited both high carboxylic group and negative charge density. Consequently, these OM types exhibited greater deposition of Ca and TOC on the membrane surface when compared to other OM types. For the coexistence of scalants and OM, Ca speciation within the fouling layer was characteristic of both Ca bound to the membrane (i.e. potential bridging, charge screening) as well as Ca-OM aggregation and deposition mechanisms, while a range of crystal polymorphs were observed to occur simultaneously. XRF and XANES represent powerful tools for the elucidation of NF fouling mechanisms by quantification of Ca deposition as well as Ca speciation. Fouling control methods should target OM types with high carboxyl group density and negative charge to neutralize or eliminate interactions with Ca.
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2. 题目: Impact of land use intensification on key drivers of soil organic carbon pools in Brazil’s Central-West

文章编号: N24121510
期刊: Catena
作者: Priscila Silva Matos, Janaína de Moura Oliveira, Márcia T De Melo Carvalho, Beáta E Madari, André Luiz Rodrigues da Silveira, Júnior Melo Damian, Pedro A de O. Morais, Wilker Alves de Araujo, Matheus Mentone de Britto Siqueira, Ryan Rodrigues da Silva, Tatiana M Ferraresi, Luis F Stone, Mellissa Ananias da Silva Soler, Fernanda Mara Cunha Freitas, Abílio Rodrigues Pacheco, Jagadeesh Yelupirati, Pedro L O A Machado
更新时间: 2024-12-15
摘要: There are studies showing the potential of integrated production systems, such as Crop-Livestock-Forestry (CLF), for soil carbon sequestration, enhancing nutrient cycling, and reducing farmers’ dependence on mineral fertilizers. However, more focused research is needed to identify the main biophysical and chemical processes governing SOC accumulation. This study investigated the main drivers of soil organic carbon sequestration and soil quality in a very clayey Rhodic Ferralsol under an 11-year-old CLF system in the Central West region of Brazil. CLF was implemented in 2009 in a conventional Pasture area and soils samples were collected in 2012 and 2020 under two land uses, CLF and conventional Pasture as time-zero reference. The soil in CLF was evaluated within the tree lines (CLF-WL) and in the alley pasture between the tree lines (CLF-BL) having palisade grass. Our results showed that SOC stocks was higher (both in 2012 and 2020) for the CLF-WL (86.70 and 83.74 Mg ha⁻¹) than in pasture reference (71.81 and 74.96 Mg ha⁻¹) within the 0.3–1.0 m soil layer. Most of the soil’s carbon content was in the mineral associated fraction (96–97 %) for all sites. Soil available water for plants (at −8 and −6 kPa) within 0.0–0.1 m soil depth increased in CLF system. Soil nutrient availability increased from 2012 to 2020 in CLF system. While in the Pasture the main drivers of SOC pools were the soil physical properties, in the CLF these were chemical soil properties. These key parameters underscore the role of CLF systems in promoting carbon storage and supporting low-carbon agriculture, particularly in the Brazilian Savanna and similar tropical regions. This knowledge allows farmers to optimize CLF management, balancing soil health with productivity.
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3. 题目: Molecular shifts in dissolved organic matter along a burn severity continuum for common land cover types in the Pacific Northwest, USA

文章编号: N24121509
期刊: Science of the Total Environment
作者: J Alan Roebuck Jr, Samantha Grieger, Morgan E Barnes, Xia Gillespie, Kevin D Bladon, John D Bailey, Emily B Graham, Rosalie Chu, William Kew, Timothy D Scheibe, Allison N Myers-Pigg
更新时间: 2024-12-15
摘要: Increasing wildfire severity is of growing concern in the western United States, with consequences for the production, composition, and mobilization of dissolved organic matter (DOM) from terrestrial to aquatic systems. Our current understanding of wildfire impacted DOM (often termed pyrogenic DOM) composition is largely built from temperature-based studies that can be difficult to extrapolate to field conditions, which are often defined by ‘burn severity’, or the post-wildfire impact observed at a site. Thus, burn severity can encapsulate a broader range of fire and environmental conditions not exclusive to temperature. Biogeochemical studies that describe DOM along burn severity continuums remain limited but are needed to better link DOM composition with field conditions post-fire. In this study, we addressed this need with an experimental open air burn simulation that generated chars from vegetation representative of major land cover types in the western United States. The chars were leached to simulate DOM mobilization potential. The DOM composition was characterized by ultra-high resolution mass spectrometry (HR-MS) and UV/VIS absorbance and fluorescence. Our results indicated that the shifts of DOM production and composition along a burn-severity gradient depends on the land cover type that was burned, with the degree of change dependent on the composition of the starting parent vegetation material. Fluorescence signatures indicated a strong convergence across land cover types to more aromatic DOM with increasing severity, while HR-MS indicated an increase in the production of aromatic nitrogen containing DOM with increasing severity. Results from this study enhance our ability to describe DOM composition in a framework that can be more directly related with field and remote-sensing based metrics.
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4. 题目: Optimizing soil properties, water use efficiency, and crop yield through biochar and organic manure integration in organic soil

文章编号: N24121508
期刊: Journal of Environmental Management
作者: Peeyush Sharma, Vikas Abrol, Jasiya Nazir, R K Samnotra, Sushil Kumar Gupta, Shrdha Anand, Jayanta Kumar Biswas, Smriti Shukla, Manish Kumar
更新时间: 2024-12-15
摘要: Speedy decomposition of organic manure and efficient utilization of rice husk waste are two critical challenges for sustainable environment and soil health management. However, understanding the synergistic effects of rice husk biochar (B) and organic manure (OM) on soil properties and crop growth in subtropical conditions remains unclear. A field study was conducted to investigate the impact of sole and combined application of rice husk biochar (0 t ha⁻¹, 3 t ha⁻¹), farmyard manure (FYM), and vermicompost (VC) on soil aggregation, aggregate-associated carbon, water use efficiency (WUE), economic benefits, and yield of radish crop in sandy clay loam organic soil. Biochar application enhanced the macroaggregate stability and aggregate associated C contents. Soil moisture, infiltration rate (IR) and WUE were significantly improved by 9.2%, 20.8% and 13.6%, respectively, with addition of biochar, which might be related to improved aggregate-associated carbon and water retention in the soil. Similarly, improved soil properties, WUE were noticed in the treatment receiving combination of FYM + VC over the control. 16% and 30.9% higher radish yield was observed with biochar and FYM + VC amended treatments compared without B0 and manure OM0, respectively. The integrated use of biochar (3 t ha⁻¹) and OM (FYM + VC) resulted in highest economic benefits of net return (₹ 138,325 ha⁻¹) and B:C (1:5) ratio and least in control plots. These results indicate that adding biochar in organic management practices considerably improved the soil properties, WUE which resulted in increased organic radish production.
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5. 题目: Precipitation regulates soil organic carbon affected by shrub encroachment along the altitude gradient

文章编号: N24121507
期刊: Catena
作者: Li Liu, Guang Zhao, Daijun Yao, Ning Zong, Yunlong He, Wenchao Wu, Qianxin Jiang, Yangjian Zhang
更新时间: 2024-12-15
摘要: Shrub encroachment significantly influences the structure and function of alpine meadow ecosystems in the Tibetan Plateau (TP); however, the combined effects of shrub expansion and climate on soil organic carbon (SOC) in these ecosystems remain largely unexplored. To address this gap, we investigated SOC content across elevation gradients (from 4311 to 4992 m a.s.l.) in both shrub-encroached and non-encroached plots at two sites, Yangbajing and Gongtang, which differ in precipitation levels. Both sites are located within the PlateauSubfrigidAridandSemiaridRegion (PSASR) of the TP. As a result, at both locations, shrub encroachment increased woody plant biomass, root biomass at 20–40 cm depth, species diversity, and soil nutrient levels, while reducing herbaceous biomass and surface root biomass (0–20 cm). These increases were strongly linked to surface soil carbon accumulation. Additionally, shrub encroachment substantially increased SOC content at both sites, with the disparity between encroached and non-encroached plots widening as precipitation increased, especially in Gongtang. Furthermore, increased soil moisture can shift the impact of shrub encroachments on plant and soil indicators from neutral to positive stances, again notably in Gongtang. This research underscores the regulatory role of moisture conditions in regulating soil carbon content within shrub-encroached alpine meadows on the TP.
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6. 题目: QUANTIFICATION OF HIGH MOLECULAR WEIGHT ORGANIC CARBON CONCENTRATIONS WITH LC-OCD AND PHMOC FOR BIOLOGICAL STABILITY INVESTIGATION OF DRINKING WATER PRODUCED FROM SURFACE WATER

文章编号: N24121506
期刊: Water Research
作者: R Schurer, A Brouwer-Hanzens, P.W.J.J. van der Wielen, J H M van Lieverloo, W A M Hijnen
更新时间: 2024-12-15
摘要: The presence of aquatic biopolymeric organic carbon of high (> 10 - 20 kDa) molecular weight (high-MW OC) in drinking water produced from surface water affects its biological stability which may cause regrowth in disinfectant-free distribution. This study compares two analytical methods for determining the concentration of aquatic high-MW OC, namely LC-OCD (liquid chromatography – organic carbon detection) and PHMOC (particulate and colloidal high-molecular weight OC). LC-OCD entails prefiltration of the water sample, chromatographical separation of the relevant biopolymer (BP) OC-fraction, and in-line OC detection. PHMOC is based on the total OC content of the concentrate obtained after 30 kDa crossflow ultrafiltration of the water sample. LC-OCD BP and PHMOC showed a good linear correlation (R² 0.87) for a suite of treated surface water matrices (except raw water) in the 10 – 200 µg/L concentration range, with PHMOC values being 10% – 30% higher than the corresponding LC-OCD BP value, without a clear impact of other water matrix constituents. The indicative yields and selectivities of both methods for indigenous high-MW OC obtained from the PHMOC concentrate were high (≥ 70 - 88%) but not fully complete, which may explain the observed higher PHMOC values and scatter in the PHMOC – LC-OCD BP correlation. LC-OCD BP and PHMOC displayed similar values and trends across the different seasons and treatment stages, with treated ground water and infiltrated water having the lowest (< 10 µg/L) values. Regrowth (as Aeromonas) levels in disinfectant-free distribution networks corresponded with the high-MW OC concentration in the treated drinking water. Overall, the two methods equivalently quantify the concentration of aquatic high-MW OC. Both methods are suitable for use in biological stability studies. The small sample volume renders LC-OCD more practical, whereas the PHMOC method enables further experimentation and characterization of the high-MW OC fraction.
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7. 题目: Insight into enhanced enrichment and nitrogen removal performance of Anammox bacteria with novel biochar/tourmaline polyurethane sponge modified biocarrier

文章编号: N24121505
期刊: Bioresource Technology
作者: Yanchen Li, Wenyi Dong, Zilong Hou, Huaguang Liu, Kaiyuan Shi, Shuo Chen, Hongjie Wang
更新时间: 2024-12-15
摘要: A novel biochar/tourmaline polyurethane sponge modified biocarrier (BTP) could enhance Anammox bacteria (AnAOB) enrichment and nitrogen removal performance. With higher hydrophilicity and specific surface area, BTP significantly improved total inorganic nitrogen (TIN) removal efficiency to 80 ± 2 %, compared to unmodified biocarrier of 67 ± 3 % when influent TIN reached 633.9 ± 22.0 mg/L. BTP stimulated the upregulation of amino acid synthases genes abundance and improved protein secretion in extracellular polymer substances (EPS). Moreover, significant increases were found in heme concentration, specific anammox activity and hydrazine dehydrogenase of AnAOB with BTP compared to unmodified biocarrier. Extracellular electron transfer pathway of AnAOB was improved by BTP via upregulating cytochrome C and ferredoxin synthesis. Candidatus Brocadia was the main genus in Anammox biofilm, with relative abundance of 20.1 % and 27.6 % in the control and BTP, respectively, which explained the improvement of nitrogen removal performance.
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8. 题目: Proteomic and spectral analysis reveals the role of extracellular polymeric substances in mercury biosorption by activated sludge under high-altitude conditions

文章编号: N24121504
期刊: Environmental Research
作者: Lei Gao, Yue Chen, Shuping Li, Zhonglian Yang, Yongze Lu, Guangcan Zhu
更新时间: 2024-12-15
摘要: In high-altitude regions, elevated mercury (Hg) levels in wastewater treatment plants (WWTPs) influent raise concerns about treatment efficiency and environmental impact. This study investigated the Hg biosorption capacity of activated sludge under high-altitude conditions, focusing on the binding mechanisms between EPS and Hg, and variations in EPS secretion. Low pressure, oxygen, and temperature at high altitudes increase EPS secretion, enhancing Hg biosorption. EPS provides numerous binding sites for Hg, forming nonfluorescent complexes with tryptophan-like and aromatic proteins, while hydrocarbon and oxygen-containing groups limit Hg entry into microbial cells. Proteomic analysis revealed the upregulation of transporters, stress-resistance, and binding proteins, along with those involved in carbon and amino acid metabolism, which enhance microbial resilience and EPS production, leading to increased Hg biosorption. These insights reveal adaptive mechanisms that optimize pollutant removal in high-altitude environments.
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9. 题目: Biomarker analysis revealed tidal organic carbon input enhanced soil respiration and weakened carbon sequestration function of estuarine wetland: Field validation of the Jiuduansha Wetland in the Yangtze River estuary

文章编号: N24121503
期刊: Geoderma
作者: Haoyu Dong, Liwei Qian, Jianfang Yan, Lianying Gao, Xiaohua Fu, Lei Wang
更新时间: 2024-12-15
摘要: In estuarine wetlands, tidal water is an important source of organic carbon input besides plants. However, it remains unclear whether tidal organic carbon input can affect soil organic carbon turnover processes in estuarine wetlands, especially soil respiration (SR) and carbon output. N-alkanes and lignin can be used as biomarker compounds to reflect the input and retention of organic carbon from tidal and plant sources. In the experiment, the contents of n-alkanes and lignin in tidal water, soil and plant samples were measured from upstream to downstream in Jiuduansha Wetland in the Yangtze River Estuary to compare the input intensity and retention capacity of tidal organic carbon with plant organic carbon in soils, and try to verify whether exogenous tidal organic carbon input enhanced SR and weakened carbon sequestration function. N-alkanes analysis revealed tidal organic carbon input gradually reduced from upstream to downstream of Jiuduansha wetland, and its degradability also reduced, which is an important reason for higher SR in upstream wetland. Lignin analysis showed the plant organic carbon input decreased with decreasing elevation, however the retention ratio of plant organic carbon was the highest in low tidal flats which has a high tidal organic carbon input. These results indicated tidal organic carbon was more easily degraded to CO2 than plant organic carbon. N-alkanes analysis also indicated only 11.94%–13.76% of the tidal organic carbon originated from CO2 (phytoplankton organic carbon (OC)), therefore the tidal organic carbon input did not increase the wetland CO2 input significantly, but significantly increase SR and CO2 emission of the wetland, this will weaken carbon sequestration function of estuarine wetland. Therefore, future studies should explore strategies to balance carbon sequestration and tidal organic matter interception and purification functions of estuarine wetlands.
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10. 题目: Understanding the molecular mechanisms of interactions between biochar and denitrifiers in N₂O emissions reduction: Pathway to more economical and sustainable fertilizers

文章编号: N24121502
期刊: Soil and Tillage Research
作者: Babak Minofar, Nevena Milčić, Josef Maroušek, Beata Gavurová, Anna Maroušková
更新时间: 2024-12-15
摘要: Biochar application to topsoil has been repeatedly and independently reported to reduce N2O emissions, yet the underlying mechanisms remain poorly understood. This study hypothesizes that biochar enhances the stability and catalytic activity of N2O reductase enzymes in denitrifying bacteria, promoting the conversion of N2O to N2 during denitrification. Interactions between biochar and the N2O reductase enzyme (PsN2OR) from the denitrifying bacterium Pseudomonas stutzeri were investigated through molecular dynamics simulations. The obtained results firstly revealed that biochar stabilizes this periplasmic enzyme in the aqueous solution via hydrophobic and hydrophilic interactions. Specifically, π–π stacking and hydrophobic interactions reduce the thermal fluctuations of hydrophobic amino acids, lowering entropy and improving enzymatic efficiency. Additionally, biochar adsorbs N2O molecules, facilitating their delivery to the active site of the enzyme and enhancing the reaction rate. Deeper understandings of molecular interactions open new pathways in developing biochar-based fertilizers with slower, more economically and more environmentally favorable release of nutrients. This new type of fertilizers creates new opportunities for the biochar market, positioning it as a valuable tool for carbon sequestration and the mitigation of N₂O emissions.
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11. 题目: Characteristics concerning the evolution of dissolved organic matter and dynamics of bacterial community during continuous thermophilic composting of oxytetracycline fermentation residue

文章编号: N24121501
期刊: Journal of Hazardous Materials
作者: Picheng Gong, Cuishuang Jiang, Gang Wang, Tingting Yu, Jian Xiao, Yangfan Du, Xuan Song
更新时间: 2024-12-15
摘要: Continuous thermophilic composting (CTC) is a potential technique to recycle oxytetracycline fermentation residue (OFR) with the extremely high level of antibiotics but is still not explored. To investigate the efficiency of CTC on treating OFR, the differences between this technique and conventional composting in the evolution of dissolved organic matter and dynamics of bacterial community were compared. The higher degradation efficiency of oxytetracycline (OTC) was obtained in CTC than conventional composting. The transformation of organic matter occurred faster and the maturity degree of compost product was higher in CTC than conventional composting. Compared with conventional composting, CTC increased the bacterial diversity and screened some functional microorganisms related to OTC degradation and organic matter transformation. The results indicate that CTC is a precise strategy for efficiently recycling OFR as soil amendment.
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