24年12月12日文献情报（11篇）

24年12月12日文献情报

1. 题目: Lifecycle environmental benefits of integrated rational fertilization, biochar, and constructed wetland in mitigating nutrient loading

文章编号: N24121212
期刊: Agricultural Water Management
作者: Yu-Ning Chen, Chihhao Fan, Michal Šereš, Markéta Šerešová, Jan Vymazal, Shu-Yuan Pan
更新时间: 2024-12-12
摘要: Agricultural activities due to fertilization contribute significantly to nutrient loadings and other environmental burdens, posing a severe threat to ecosystems. Although a portfolio of green agricultural practices is recommended, few studies address the environmental benefits from a life-cycle perspective. This study comprehensively evaluates the cradle-to-gate environmental benefits of integrating rational fertilization, biochar, and constructed wetlands (CWs) exemplified by plum cultivation. Four assessment scenarios were designed: (S1) conventional cultivation, (S2) rational fertilization with biochar amendment, (S3) conventional cultivation with a simulated CWs system, and (S4) rational fertilization with biochar amendment and a simulated CWs system. In the assessment, rational fertilization used half the fertilizer compared to conventional practices, biochar was applied at 0.1 ton/ha, and horizontal subsurface flow CWs were filled with washed gravel and planted with Phragmites australis. The findings show that rational fertilization combined with biochar (S2) or CWs (S3) alone show about half the eutrophication impacts of conventional cultivation (S1). Combining rational fertilization, biochar and CWs (S4) further reduces freshwater and marine eutrophication potentials by ∼73.5 % and ∼69.8 %, respectively. Similarly, these green agricultural practices (either S2 or S4) effectively reduce the overall endpoint impacts by about 47 %, with synergistic improvements, particularly in endpoint freshwater ecotoxicity and freshwater eutrophication, observed for S4 (a significant reduction of 76 %) compared to S1. Regarding the carbon footprint, the production of plums using conventional agriculture emits ∼300 kg CO2-eq per ton-plum, whereas using green agricultural practices results in only ∼138 kg CO2-eq per ton-plum, representing a reduction of 45.8 % in greenhouse gas emissions. This study highlights the potential of green agricultural practices to mitigate NPS nutrient loadings to aquifers and achieve sustainable agricultural management through reduced global warming and other environmental impacts.
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2. 题目: Nitrogen-phosphorus codoped biochar prepared from tannic acid for degradation of trace antibiotics in wastewater

文章编号: N24121211
期刊: Environmental Research
作者: Xixi Di, Xia Zeng, Xiaoyu Zhang, Tian Tang, Zuoping Zhao, Wei Wang, Zhifeng Liu, Lingxia Jin, Xiaohui Ji, Xianzhao Shao
更新时间: 2024-12-12
摘要: This study was designed to develop a one-step pyrolysis process that could efficiently activate peroxymonosulfate (PMS) and degrade tetracycline hydrochloride (TCH) by producing N, and P codoped carbon materials (NPTC₃-800). Furthermore, it exhibited a high specific surface area (658 cm²g^-1), a larger pore volume (0.3 cm³g^-1), and a certain content of heteroatoms (nitrogen and phosphorus). PMS-activated NPTC₃-800 attained a TCH removal efficiency of over 90% within 40 min, with an observed rate constant (k_obs) of 0.0307 min^-1. Similarly, the materials exhibited strong resistance to ionic interferences and showed broad applicability across various water bodies. Mobility experiments were conducted to further assess the stability of catalyst (92%, 40h). Non-radical oxidation pathways, particularly including the singlet oxygen (¹O₂), were evidenced to play dominant roles in TCH degradation, as demonstrated by electron paramagnetic resonance (EPR) observations and experiments with free radical quenching. Theoretical calculations demonstrated that the N and P codoped domains substantially improve TCH removal compared to pure biochar. Finally, the proposed degradation pathways for TCH were identified, and the resulting degradation products demonstrated reduced biological toxicity.
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3. 题目: Dominant Edaphic Controls on Particulate Organic Carbon in Global Soils

文章编号: N24121210
期刊: Global Change Biology
作者: Ziyu Guo, Jianzhao Liu, Liyuan He, Jorge L Mazza Rodrigues, Ning Chen, Yunjiang Zuo, Nannan Wang, Xinhao Zhu, Ying Sun, Lihua Zhang, Yanyu Song, Dengjun Zhang, Fenghui Yuan, Changchun Song, Xiaofeng Xu
更新时间: 2024-12-12
摘要: The current soil carbon paradigm puts particulate organic carbon (POC) as one of the major components of soil organic carbon worldwide, highlighting its pivotal role in carbon mitigation. In this study, we compiled a global dataset of 3418 data points of POC concentration in soils and applied empirical modeling and machine learning algorithms to investigate the spatial variation in POC concentration and its controls. The global POC concentration in topsoil (0–30 cm) is estimated as 3.02 g C/kg dry soil, exhibiting a declining trend from polar regions to the equator. Boreal forests contain the highest POC concentration, averaging at 4.58 g C/kg dry soil, whereas savannas exhibit the lowest at 1.41 g C/kg dry soil. We developed a global map of soil POC density in soil profiles of 0‐30 cm and 0–100 cm with an empirical model. The global stock of POC is 158.15 Pg C for 0–30 cm and 222.75 Pg C for 0–100 cm soil profiles with a substantial spatial variation. Analysis with a machine learning algorithm concluded the predominate controls of edaphic factors (i.e., bulk density and soil C content) on POC concentration across biomes. However, the secondary controls vary among biomes, with solid climate controls in grassland, pasture, and shrubland, while strong vegetation controls in forests. The biome‐level estimates and maps of POC density provide a benchmark for modeling C fractions in soils; the various controls on POC suggest incorporating biological and physiochemical mechanisms in soil C models to assess and forecast the soil POC dynamics in response to global change.
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4. 题目: More Frequent Runoff and Connected Sources in Headwaters Promote Browning of Northern Freshwaters

文章编号: N24121208
期刊: Environmental Science & Technology Letters
作者: Stefano Basso, Andreas Musolff, Heleen A de Wit
更新时间: 2024-12-12
摘要: Sustained browning of northern waters has prompted inquiries into the drivers of increasing concentrations of organic matter. While reduced sulfur deposition is a key cause, an increasing role of hydrologic mechanisms as a result of cleaner air and progressing climate change has been repeatedly suggested. How these controls act remains however unclear. Here we examine over 30 years of organic carbon concentration and discharge data from four reference streams located across Norway to pinpoint consistent hydrologic changes that may promote water browning. Stable slopes with changing intercepts of the concentration-discharge relations indicate that the influence of air pollution on soil solution chemistry is plausible, supporting available chemical explanations from a hydrologic perspective. Decreasing ratios of concentration to discharge variability, observed in autumn over the years, point to less spatial heterogeneity of the sources of organic carbon. A clear rise in the frequency of runoff events, which increases the opportunities for dissolved organic carbon to transit from soil to streams, also indicates higher hydrologic connectivity and more even mobilization of carbon sources. More connected sources and more frequent runoff events, which jointly enhance the likelihood of organic carbon reaching rivers, may thus contribute to the observed browning of northern waters.
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5. 题目: A perspective on the algae-derived dissolved organic matter and its dynamic influence on the aggregation of nanoplastics in eutrophic waters

文章编号: N24121207
期刊: Chemosphere
作者: Xiang Liu, Quan Yuan, Jihui Ding, Yaoqiang Li, Xiaofeng Liu, Chen Fang, Min Wang
更新时间: 2024-12-12
摘要: The aggregation behavior of nanoplastics (NPs) is crucial in determining their fate in aquatic environments. Dissolved organic matter (DOM), characterized by its complex molecular structure and diverse functional groups, can spontaneously absorb on the surface of NPs, thus altering their colloidal stability. In eutrophic waters, DOM primarily originates from metabolic byproducts released by phytoplankton, and its molecular composition and hydrophilic properties change dynamically as the progression of algal blooms. This perspective aims to summarize the heterogeneity of DOM during the initiation, outbreak and recession of algal blooms. And we investigate the influence of molecular-level variations in DOM composition on the aggregation behavior of NPs. Additionally, this study provides insights into the underlying mechanisms relating to the interactions between DOM and NPs. Ultimately, it tackles the challenges and future directions, highlighting the necessity for comprehensive studies to understand the fate of NPs in eutrophic waters.
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6. 题目: Application of Magnetically Recoverable Biochar Amended Zirconium Adsorbent Composite for Enhanced As(III, V) Removal from Aqueous Solutions

文章编号: N24121206
期刊: Water, Air, & Soil Pollution
作者: Imdad Ullah, Shams Ali Baig, Harsa Zaheer, Dilawar Farhan Shams, Hamida Bibi, Waliullah Khan, Xinhua Xu, Muhammad Danish
更新时间: 2024-12-12
摘要:

The occurrence of elevated levels of arsenic in water sources is a global health concern and necessitates implementing sustainable removal technologies. The utilization of biochar composite for treating arsenic contaminated water has been reported as a promising technique in recent years. In the present study, corncob biochar was magnetically modified and amended with zirconium (CCB@Fe₃O₄-Zr with Zr to Fe₃O₄ molar ratio of 1:1, and 1:5) for the purposively removal of As(III) and As(V) from aqueous solutions. Characterization analyses and factors affecting the adsorption, such as adsorbent dose, initial As(III) and As(V) concentration, pH, temperature, contact time, and co-existing anions were investigated. Results demonstrated that the removal of As(III) and As(V) were about 81 and 99%, respectively with the initial concentration of 80 mg/L. Lower solution pH favored As(V) removal and it slightly affected As(III) adsorption in pH range (5.0 to 9.0) due to the presence of neutral As(III) form. Also, increased solution temperature promoted As(V) removal performance demonstrating of an endothermic nature of the adsorption process. Characterization analyses confirmed of the successful magnetization of biochar and zirconium amendment with 7.8 Am²/kg saturation magnetization potential and thermally super stable (> 60% residual mass). The weight percentage of Fe and Zr were 12.23 and 7.54% in CCB@Fe₃O₄-Zr, which revealed the sufficient agglomeration of the surface modified components on biochar and the post-adsorption tests revealed arsenic adsorption. Findings from the present study suggested that the adsorbent composite could be a precise and promising alternative for enhanced As(III) and As(V) removal from contaminated water.

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7. 题目: Ozone catalyzation modulated by oxygen vacancies over Co/Mg loading on biochar derived from Chlorella pyrenoidosa for wastewater purification

文章编号: N24121205
期刊: Chemical Engineering Journal
作者: Xingyue Wei, Hanmin Zhang, MengBo Cao
更新时间: 2024-12-12
摘要: In this study, a series of biochar-based materials (nCo₉S₈/MgO-NPC) doped with different Co and Mg mass ratios were successfully prepared through a one-step pyrolysis method using Co(NO₃)₂·6H₂O, MgSO₄·7H₂O and N, P-rich Chlorella pyrenoidosa (CP) as raw materials for the degradation of ibuprofen (IBU) by heterogeneous catalytic ozonation (HCO) process. The nCo₉S₈/MgO-NPC catalysts exhibited superior HCO activity compared with NPC, Co-NPC, MgO-NPC and 0.3Co₉S₈/MgO. It was also found that the HCO activity gradually increased as the Co/Mg mass ratio decreased, and 0.3Co₉S₈/MgO-NPC exhibited the highest HCO activity, with a corresponding reaction rate constant of 0.224 min⁻¹. The 0.3Co₉S₈/MgO-NPC/O₃ system also exhibited better catalytic stability after four cycles, mitigating the hydration of MgO and Co ion leaching. The IBU removal was mainly attributed to the surface adsorbed atomic oxygen (*O_ad) and hydroxyl radicals (·OH). Deprotonation of surface hydroxyl groups, oxygen vacancies (OVs) and the redox reactions of Co²⁺ were confirmed to be the active sites promoting the decomposition of ozone by using techniques such as X-ray Photoelectron Spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR). The degradation pathway of IBU was deduced and the toxicity of the intermediates was evaluated. 0.3Co₉S₈/MgO-NPC displayed notable anti-interference to various complex water quality, including inorganic anions, humic acid (HA) and so on. This study provides valuable insights for the design of efficient MgO-based catalysts for catalytic ozonation in environmental management and industrial applications.
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8. 题目: Biochar decorated 2D/2D heterojunction with enhanced photocatalytic activity for uranium extraction

文章编号: N24121204
期刊: Separation and Purification Technology
作者: Jiacheng Zhang, Yue Wang, Lijuan Feng, Jun Zhang, Xuefeng Tian, Shaohui Huang, Yihui Yuan, Ning Wang
更新时间: 2024-12-12
摘要: The acquisition of resources and treatment of pollution associated with uranium are of profound significance for the long-term sustainability of nuclear power. Photocatalytic technology offers a promising strategy for uranium extraction due to its ability to enhance the reaction kinetics and selectivity. However, developing photocatalysts with high-efficiency charge separation remains a significant challenge in uranium extraction. Herein, we devised and prepared a biochar decorated 2D/2D heterojunction, Bi₂WO₆/g-C₃N₄/BC, for uranium extraction from seawater and wastewater. Due to the layered structure and matched lattice of Bi₂WO₆ and g-C₃N₄ nanosheets, Bi₂WO₆/g-C₃N₄ heterojunction can be easily fabricated, providing a large interface contact area and excellent charge transfer. The synergistic effect of biochar with the heterojunction further enhances light adsorption and promotes the separation of photogenerated electron-hole pairs. These features endow the Bi₂WO₆/g-C₃N₄/BC composite with a suitable bandgap and effective electronic conductivity for photocatalysis of uranium. The photocatalytic product was identified as the air-stabilized metastudtite (UO₂)O₂·2H₂O, which is formed by photogenerated e⁻ and ·O₂⁻ during the photocatalysis process. As a result, Bi₂WO₆/g-C₃N₄/BC achieves a uranium capacity of 3.2 mg g⁻¹ in natural seawater within 7 days and a uranium removal rate of 85.9 % in simulated nuclear wastewater. This study provides novel insights into the fabrication of highly efficient electronic conduction for uranium photocatalysts, which is significant for accelerating the development of uranium resource recovery and pollution treatment.
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9. 题目: Role of Iron in Stabilization of Soil Organic Carbon Under Different Vegetation Communities of Mangrove Wetlands

文章编号: N24121203
期刊: Land Degradation & Development
作者: Haixiao Zhao, Qian Tan, Sibo Zhang, Wei Yang, Feiyang Xia, Hongjiang Guo
更新时间: 2024-12-12
摘要: Iron (Fe) oxides play an important role in maintaining soil organic carbon (SOC) stability. However, little attention has been paid to the role of Fe oxides in preserving SOC in mangrove wetlands with different vegetation communities. In this study, four soils of dominant vegetation communities: Phragmites australis (PA), Acanthus ilicifolius (AI), Sonneratia apetala (SA), and mixed soils of S. apetala and A. ilicifolius (SA + AI) were selected from mangrove wetland of Qi'ao Island. The distributions of Fe‐bound organic carbon (OC‐Fe) and Fe oxides (Fe_o, acid oxalate‐extractable Fe; Fe_p, pyrophosphate‐extractable Fe), and the role of soil factors in SOC conservation were investigated. The results showed that soil OC‐Fe content ranged from 1.03 to 4.96 g/kg, with a contribution to SOC ranging from 5.97% to 24.07%, which was highest in SA + AI (3.58 ± 0.94 g/kg), followed by PA (2.67 ± 1.07 g/kg), SA (1.88 ± 0.43 g/kg), and AI (1.82 ± 0.32 g/kg). The Fe_p content was higher in the PA and SA + AI, however, the Fe_o content was lower. Structural equation modeling indicated that SOC, Fe_o, and Fe_p were direct drivers of OC‐Fe formation. Overall, the aboveground biomass of different vegetation communities indirectly affected the OC‐Fe content by regulating SOC inputs. High water contents, low oxygen conditions, and near‐neutral soils in mangrove wetlands favor OC‐Fe formation between Fe oxides and SOC by co‐precipitation or complexation. This study highlights the importance of mangrove wetland vegetation communities in Fe‐C coupling, while providing theoretical support for the study of carbon cycling processes in mangrove wetlands.
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10. 题目: Short‐term crop residue amendments altered the chemodiversity and thermodynamic stability of dissolvable organic matter in paddy soil

文章编号: N24121202
期刊: European Journal of Soil Science
作者: Shuotong Chen, Xin Xia, Xiao Feng, Qingmei Lin, Genxing Pan
更新时间: 2024-12-12
摘要: The chemodiversity and thermodynamic stability of dissolvable organic matter (DOM) in paddy soil under different crop residue managements remain unclear. Using Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICR‐MS) analysis, we explored the molecular composition of DOM in paddy soil 4 years following incorporation of maize residue in different forms (air‐dried straw, manure and biochar). Compared to the control without amendments, manure increased the pool size of DOM but reduced its chemodiversity, while the straw and biochar amendments reduced the pool size but increased the chemodiversity of DOM by 0.22 and 0.05, respectively. Though approximately 60% of the compounds were shared among the treatments, those distinct among the treatments were shaped by residue‐derived lignin‐like compounds. Moreover, the nominal oxidation state of carbon (NOSC), which corresponds to the energy content in organic carbon, decreased with the maize residue amendments, regardless of the forms. Thus, crop residue amendments could lead to higher DOM persistence in the short‐term, potentially slowing carbon turnover in paddy soil.
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11. 题目: Iron-modified coal gangue/rice husk biochar composites for enhanced removal of aqueous As(V)

文章编号: N24121201
期刊: Separation and Purification Technology
作者: Weizheng Kong, Xianxu Li, Fang Li, Andrew R Zimmerman, Bin Gao, Jun Wang
更新时间: 2024-12-12
摘要: Addressing the severe arsenic pollution issue in coal mining areas is crucial for environmental protection and human health. Adhering to the principles of a circular economy, we have innovatively employed ball milling technology to successfully develop a pioneering composite material of iron-modified coal gangue (CG-Fe) and rice husk (RH) biochar, which holds significant importance in the conservation of the environment and the preservation of human health. Using aqueous batch experiments, As(V) adsorption by the pristine biochar and iron-modified coal gangue was compared to that of composites made with varying biochar and coal gangue ratios under varying conditions. The composite containing 40 % biochar by weight (40 %-RH/CG-Fe) exhibited the highest adsorption of As(V). It had a high pore volume (0.087 cm³ g⁻¹) and specific surface area (24.5 m²/g), which were larger than those of the balled milled Fe-treated coal gangue. Adsorption isotherm and kinetics experiments demonstrated that 40 %-RH/CG-Fe had a maximum As(V) adsorption capacity of 76.3 mg/g, reached equilibrium after approximately 48 h, and took place in a two-step process. The adsorption of As(V) by 40 %-RH/CG-Fe remained effective even in the presence of humic acid, heavy metal cations, and most anions. Other analyses, including XRD, FTIR, XPS, and zeta potential, suggested that the removal of As(V) by the composite was predominantly due to electrostatic attraction on surface sites, but might also involve redox reactions with Fe and complexation with functional groups. Five consecutive adsorption regeneration cycles demonstrated that 40 %-RH/CG-Fe can be reused in the As(V) treatment. Iron-modified coal gangue/rice husk biochar composites demonstrate great potential as an efficient and cost-effective green sorbent for mitigating arsenic contamination in soils and waters of coal mine regions.
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