24年10月23日文献情报（8篇）

24年10月23日文献情报

1. 题目: Cocoa pod husk-derived organic soil amendments differentially affect soil fertility, nutrient leaching, and greenhouse gas emissions in cocoa soils

文章编号: N24102308
期刊: Journal of Cleaner Production
作者: Lumbani Mwafulirwa, Tom Sizmur, Andrew Daymond, Laura Atuah, Amos Kojo Quaye, Sean Coole, Steve Robinson, John Hammond, Godfred Awudzi, Dadson Awunyo-Vitor, Owusu Domfeh, Paul Hadley
更新时间: 2024-10-23
摘要: The depletion of soil nutrients and decline in yields on cocoa farms in west Africa over time force farmers to abandon their farms and look for new fertile land, thereby contributing to deforestation. Cocoa pod husks (CPH) are a major farm waste representing considerable export of nutrients from cocoa soils, particularly P and K. Here, the impacts of soil amendment with raw CPH residues, CPH compost, CPH biochar, or a CPH compost-biochar mixture on soil fertility, greenhouse gas (GHG) emissions, and nutrient losses via leaching were assessed in two laboratory experiments using two major soil types used for cocoa cultivation in Ghana (an acidic Ferralsol and an alkaline Nitisol). In Experiment 1, soil nutrient availability and CO₂ and N₂O emissions were quantified, whereas simulation and quantification of nutrient leaching were conducted in Experiment 2. Soil pH increased from 4.8 and 8.6 by 1.4- and 1.1-folds on average in amended Ferralsols and Nitisols, respectively. Soil electrical conductivity increased in soils amended with CPH compost and/or biochar. Addition of raw CPH caused remarkable microbial immobilisation of N and reduced N availability and leaching, whereas CPH compost and/or biochar addition increased soil nitrate availability but reduced soil ammonium availability. Leaching of Ca in Nitisols was reduced when CPH biochar was included in the soil amendment. While soil K availability increased in all amended soils, most notably when CPH biochar was included, soil P and Ca availabilities were greatest where CPH compost was included. Soil total GHG emission (CO₂ plus N₂O) increased in all amended Ferralsols and the Nitisols amended with CPH compost or raw CPH, with the latter remarkably increasing soil CO₂ emission by up to 14.8-folds. Compared to sole CPH compost amendment, CPH compost-biochar mixture amendment reduced soil total GHG emission and N and P leaching. These findings show that composted and/or pyrolysed CPH can be judiciously used to enhance soil fertility in cocoa farms, particularly in acidic soils. Pyrolysed CPH is especially beneficial for reducing soil nutrient leaching and GHG emissions and thus for increasing the sustainability of cocoa production in Ghana and west Africa.
文章二维码:

2. 题目: Manganese-Modified Biochar for Sediment Remediation: Effect, Microbial Community Response, and Mechanism

文章编号: N24102307
期刊: Environmental Pollution
作者: Xudong Deng, Guomin Chen, Chao Zhang, Xueping Gao, Bowen Sun, Baoqing Shan
更新时间: 2024-10-23
摘要: Heavy metal sediment pollution has become an increasingly serious problem associated with industrial development, so extensive studies have been conducted concerning their removal. Biochar has recently shown good potential for in-situ remediation of heavy metal-contaminated sediments. The heavy metal adsorption capacity of inexpensive biochar can be improved by loading it with metal oxides. In this study, manganese-modified biochar (MBC) was prepared by KMnO₄-modified waste-activated sludge biochar and applied to immobilize Pb and Cd in sediments. Its effects on the sediment microbial community were also investigated. The Results showed that manganese modification of the biochar made it more conducive to the adsorption of heavy metals, owing to its higher specific surface area and graphitization structure, more active sites and oxygen-containing groups, and the presence of Mn₂O₃ crystal structure on the surface. The maximum adsorption capacities of this material for Pb²⁺ and Cd²⁺ in solution were 176.9 mg/g and 44.0 mg/g, respectively. The application of MBC to the remediation of heavy metal-contaminated sediments transformed Pb and Cd in the sediments from exchangeable to residual state. The F4 content of Pb in the sediments increased from 40.52%-42.36% to 49.11%-51.14% after application of 1% MBC, and to 63.94%-64.49% after application of 5% MBC. Correspondingly, the F1 content of Pb in the sediments decreased from 29.09%-30.68% to 17.43%-17.69% after the application of 5% MBC. Furthermore, MBC efficiently enriched the microbial biodiversity and affected the microbial population structure within 60 days. The relative abundance of uncultured f Symbiobacteraceae and Fonticella communities significantly increased after incubation. The results may provide empirical support for the combination of metal oxides and biochar for the remediation of heavy metal-contaminated sediments.
文章二维码:

3. 题目: Innovation for recycling of organic matter through composter with automatic and sustainable temperature recording accessed via Bluetooth/mobile app

文章编号: N24102306
期刊: Environmental Monitoring and Assessment
作者: Lucas Lourenço Castiglioni Guidoni, Érico Kunde Corrêa, Paulo César Sedrez Moncks, William Cezar Nadaleti, Flávio Manoel Rodrigues Silva, Thomaz Lucia
更新时间: 2024-10-23
摘要:

Compost reactors, commonly used in experiments, industrial assays, and home residue treatment systems, have the potential to facilitate composting. Challenges persist in the realm of small-scale composting, encompassing facets such as temperature monitoring, homogenization of the compost mass, management of moisture with the control of leachate generation, and integration with a renewable energy source. This study assesses a pioneering composter prototype endowed with essential features to ensure a pragmatic and secure composting process. This includes the facilitation of remote access to temperature data via Bluetooth and a mobile application. Across successive trials, the scrutinized composter prototype consistently yielded reproducible outcomes, exhibiting a coefficient of variation below 25% for the majority of appraised parameters. In comparison to a conventional reactor, the decomposing residue mixture within the examined prototype manifested elevated temperatures (p < 0.05). Moreover, the tested prototype demonstrated C/N ratio lower than 20/1 within 45 days, a higher final nitrogen concentration, and enhanced germination of seeds that served as phytotoxicity bioindicators. Notably, the prototype needed 46.6% less space, offering improved leachate control, three times faster turning time, temperature monitoring, and reduced fly attraction.

Graphical

文章二维码:

4. 题目: Preparation for a Novel N-Doped Magnetic Sludge-Based Biochar and Application for Norfloxacin Removal from Wastewater

文章编号: N24102305
期刊: Water, Air, & Soil Pollution
作者: Junming Yi, Dongsheng Feng, Jiangzhe Fu, Yuxin Liu, Ruihui Gong, Peizu Liu, Jing Guo, Kai Cui, Huidong Li
更新时间: 2024-10-23
摘要:

Nowadays, the use of antibiotics is widespread which is causing great pressure on the ecological environment. Incorporation of nitrogen source in biochar can improve its adsorption performance, which is widely used as an adsorbent due to its high efficiency and low-cost. In this study, municipal sludge and red mud were used as raw materials, urea as nitrogen source and KOH and ammonium oxalate as activators to prepare N-doped sludge-based magnetic biochar (NBC) by co-pyrolysis for adsorption of norfloxacin (NOR) in wastewater. The experiment was conducted using 50 mL of NOR wastewater with a concentration of 100 mg/L. The optimal adsorption conditions were identified as 1.6 g/L dosage, pH 5, and temperature 25 °C. The actual adsorption capacity of NBC reached a maximum of 160.25 mg/g. The maximum adsorption capacity of NBC was 388.82 mg/g, which was measured by Langmuir isothermal modelling. The adsorption kinetics are consistent with a pseudo-second order model, while the adsorption isotherms are consistent with the Langmuir and Freundlich models. The characterization demonstrates that NBC is a rough and porous material, with a specific surface area of 192.8397 m2/g and a surface functional group composition including -OH/NH, C = C, C = N, C-O. The main mechanisms of this research include pore filling, π-π interactions, H-bonding and electrostatic interactions. The introduction of a nitrogen source to sludge-based magnetic biochar (BC) has improved its performance in various aspects of adsorption. This paper demonstrates the excellence of NBC by comparing the adsorption performance of NOR with that of BC, which has great potential for future practical applications.

Graphical

文章二维码:

5. 题目: Revealing the Interplay of Dissolved Organic Matters Variation with Microbial Symbiotic Network in Lime-Treated Sludge Landscaping

文章编号: N24102304
期刊: Environmental Research
作者: Zexu Chen, Yu Zhang, Boyuan Yang, Sen Fan, Lanfeng Li, Peng Yang, Weijun Zhang
更新时间: 2024-10-23
摘要: Lime pretreatment is commonly used for sludge hygienization. Appropriate lime dosage is crucial for achieving both sludge stabilization (lime dosage > 0.2 g/g-TS) and promoting plant and soil health during subsequent landscaping (lime dosage < 0.8 g/g-TS). While much research has been conducted on sludge lime treatment, few studies have examined the effects of lime dosing on integrating sludge stabilization and plant growth promotion during landscaping. In this study, we investigated microbial dynamics and dissolved organic matter (DOM) transformation during sludge landscaping with five lime dosage gradients (0, 0.2, 0.4, 0.6, 0.8 g lime/g-TS) over 90 days. Our results showed that a lime dosage of 0.4 g/g-TS is the lower threshold for achieving waste activated sludge (WAS) stabilization during landscaping, leading to maximum humic substance formation and minimal phytotoxicity. Specifically, at 0.4 g/g-TS lime dosage, protein degradation and decarboxylation-induced humification were significantly enhanced. The predominant microbial genera shifted from Aromatoleum to Exiguobacterium and Romboutsia (both affiliated with the phylum Firmicutes). Reactomics analysis further indicated that a 0.4 g/g-TS lime dosage promoted the hydrolysis of proteins (lyase reactions on C-C, C-O, and C-N bonds), amino acid metabolism, and decarboxylation-induced humification (e.g., C₁H₂O₂, C₂H₄O₂, C₅H₄O₂, C₆H₄O₂). The co-occurrence network analysis suggested that the phyla Firmicutes, Proteobacteria, and Bacteroidetes were key players in DOM transformation. This study provides an in-depth understanding of microbe-mediated DOM transformation during sludge landscaping and identifies the optimal lime dosage for improving sludge landscaping efficiency.
文章二维码:

6. 题目: Nutrient Addition Enhances the Temperature Sensitivity of Soil Carbon Decomposition Across Forest Ecosystems

文章编号: N24102303
期刊: Global Change Biology
作者: Chen Chen, Junmin Pei, Bo Li, Changming Fang, Ming Nie, Jinquan Li
更新时间: 2024-10-23
摘要: Atmospheric nitrogen (N) and phosphorus (P) depositions have been shown to alter nutrient availability in terrestrial ecosystems and thus largely influence soil carbon cycling processes. However, the general pattern of nutrient-induced changes in the temperature response of soil carbon decomposition is unknown. Yet, understanding this pattern is crucial in terms of its effect on soil carbon–climate feedback. Here, we report that N and P additions significantly increase the temperature sensitivity of soil organic carbon decomposition (Q₁₀) by sampling soils from 36 sites across China's forests. We found that N, P, and their co-addition (NP) significantly increased the Q₁₀ by 11.3%, 11.5%, and 23.9%, respectively. The enhancement effect of nutrient addition on Q₁₀ was more evident in soils from warm regions than in those from cold regions. Moreover, we found that nutrient-induced changes in substrate availability and initial substrate and nutrient availability mainly regulated nutrient addition effects. Our findings highlight that N and P deposition enhances the temperature response of soil carbon decomposition, suggesting that N and P deposition should be incorporated into Earth system models to improve the projections of soil carbon feedback to climate change.
文章二维码:

7. 题目: Intracellular and extracellular organic matter removal by BT/C heterogeneous interface under visible light photodriven

文章编号: N24102302
期刊: Chemical Engineering Journal
作者: Nan Wang, Zhiwei Zhou, Chunjiao Liu, Yongwang Liu, Xing Li, Yanling Yang, Li Zhao
更新时间: 2024-10-23
摘要: Algae-derived organic matter (AOM) limits the effectiveness of conventional water treatment processes, affects the normal operation of water treatment plants, and causes water quality deterioration. Efficient elimination of AOM is an urgent issue in the advanced treatment of drinking water. In this study, A heterogeneous interface for AOM removal was established based on BT/C, which can be driven by visible light. The removal efficiencies of extracellular organic matter (EOM), intracellular organic matter (IOM), and AOM by BT/C reached the optimal levels at 30 min, 60 min, and 90 min, respectively, reaching 48.5 %, 81.8 %, and 74.0 %. BT/C can oxidize and break down a large amount of high-molecular-weight organic matter in EOM into medium- and low-molecular-weight organic substances, and effectively remove the low-molecular-weight organic matter in EOM. In addition, BT/C can efficiently remove humic acids(HS) and aromatic protein organic matter in IOM, directly mineralize or decompose high-molecular-weight biopolymers into small-molecular-weight acidic and neutral organic matter; electron paramagnetic resonance spectroscopy and reactive oxygen species trapping experiments verified that hydroxyl radical (·OH) have play most important role on the degradation of various molecular weight organic matters. Superoxide radical (·O₂^–) plays a dominant role in the oxidation process of soluble microbial metabolites and HS, and ·OH plays a significant role in the oxidation process of amino acid-like proteins. This study provides new ideas and technical support for the complete removal of algae-derived organic matter and the protection of drinking water safety
文章二维码:

8. 题目: Coupling Effect of Elemental Carbon and Organic Carbon on the Changes of Optical Properties and Oxidative Potential of Soot Particles under Visible Light

文章编号: N24102301
期刊: Environmental Science & Technology
作者: Rui Tang, Jiong Cao, Jing Shang, Yu Kuang, Hong Geng, Xinghua Qiu
更新时间: 2024-10-23
摘要: Soot particles, coming from the incomplete combustion of fossil or biomass fuels, feature a core–shell structure with inner elemental carbon (EC) and outer organic carbon (OC). Both EC and OC are known to be photoactive under solar radiation. However, research on their coupling effect during photochemical aging remains limited. This study examines how the optical properties and oxidative potential (OP) of wood, coal, and diesel soot particles with varying EC and OC levels are affected by exposure to visible light. Wood soot, which has the highest OC content, showed the most significant changes in both optical properties and OP, indicating its highest sensitivity to visible light aging. Molecular composition analysis revealed that the reduction of polycyclic aromatic hydrocarbons (PAHs) and methyl-PAHs primarily affects the optical properties, while oxygenated PAHs play a major role in OP. Combined with the results from reactive oxygen species detection, it is suggested that EC initiates photoreactions by generating superoxide anions, while OC undergoes compositional changes that result in subsequent atmospheric effects. These findings enhance our understanding of the photochemical aging process of soot particles and their implications for climate and health.
文章二维码:

更多信息关注“天然有机质研究情报”。

长按二维码识别关注我们