24年10月31日文献情报（13篇）

24年10月31日文献情报

1. 题目: Remediation pathways and mechanism of Fe-Zn-supported biochar on Cd accumulation in wheat: wheat tissues and coexisting elements

文章编号: N24103113
期刊: Plant and Soil
作者: Tingting Yang, Xin Xiang, Shengguo Jiang, Jingguo Cao, Yuebing Sun, Yingming Xu, Zongzheng Yang
更新时间: 2024-10-31
摘要:

Background and aims

Cadmium (Cd)-contaminated wheat grains seriously threaten human health. Here, a novel iron/zinc-supported biochar (Fe/Zn-BC) was prepared and applied to investigate the remediation effects of alkaline soil and wheat contaminated with Cd, focusing on the influence mechanism on the Cd and coexisting elements accumulation in wheat.

Methods

We performed various doses of BC and Fe/Zn-BC treatment in the winter wheat pots. The available Cd content and Cd fraction in the soil, and Cd, Fe, Zn, Mn, Cu, Ni, and Pb contents in wheat tissues were determined.

Results

The results showed that the contents of DTPA-Cd and DTPA-Pb were significantly reduced by 33-54% and 10-27% in the Fe/Zn-BC treated soil, respectively. The reduction rates of Cd in wheat root, straw, node, flag leaf, and grain in Fe/Zn-BC treatments were better than those of BC treatments. Furthermore, Zn, Fe, and Mn contents increased significantly in root, straw, node, flag leaf and grain. Both the bioaccumulation factor (BF) and transfer factor (TF) of Cd were decreased with the addition of Fe/Zn-BC, expect for the TF_leaf/root. Structural equation model fitting results showed that inhibition of Cd uptake by root and promoting Cd transport from root to flag leaf were the main pathways to reduce grain Cd content. Increasing the coexisting elements of Zn and Mn to reduce the accumulation of Cd in grains through antagonism was another important mechanism in the Fe/Zn-BC treatments.

Conclusion

Fe/Zn-BC was an amendment that efficiently reduced Cd accumulation in wheat grains and had great potential for remediation of Cd-contaminated soil.

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2. 题目: Promoting Role of Nitrogen-Fixing Bacteria and Biochar on Nitrogen Retention and Degradation of PBAT Plastics during Composting

文章编号: N24103112
期刊: Environmental Pollution
作者: Linshan Wang, Yanjiao Qi, Long Cao, Lisha Song, Run Hu, Qian Li, Yaming Zhao, Junyan Liu, Hong Zhang
更新时间: 2024-10-31
摘要: Since the increasing number of polybutylene adipate terephthalate (PBAT)–based plastics entering the environment, the search for sustainable treatment methods has become a primary focus of contemporary research. Composting offers a novel approach for managing biodegradable plastics. However, a significant challenge in the composting process is how to control nitrogen loss and enhance plastic degradation. In this context, the effect of various additives on nitrogen retention, PBAT plastics degradation, and microbial community dynamics during composting was investigated. The findings revealed that the addition of nitrogen-fixing bacteria Azotobacter vinelandii and biochar (AzBC) significantly improved nitrogen retention and accelerated PBAT rupture within 40 days of composting. Specifically, the PBAT degradation rate in the AzBC group reached 29.6%, which increased by 12.14% (P<0.05) compared to the control group. In addition, the total nitrogen (TN) content increased by 6.20% (P<0.05), and the Nitrogen-fixing enzyme (NIT) content increased by 190 IU/L (P<0.05). Further analysis of GC-MS confirmed the presence of low molecular weight fragmentation products, such as 6-(4-hydroxybutoxy)-6-oxohexanoic acid. The AzBC treatment promoted the proliferation of Klebsiella at the genus level that could enhance nitrogen retention and the bacteria that have the ability to degrade PBAT, such as Proteobacteria and Firmicutes at the phyla level, and Pseudoxanthomonas, Pseudomonas, and Flavobacterium genera at the genera level (P<0.05). Correlation analysis indicated that the degradation of PBAT is positively correlated with Temperature (T), NIT, and TN, but negatively correlated with the organic matter (OM) content and germination index (GI). In conclusion, the co-application of biochar and Azotobacter vinelandii offers promising sustainable prospects for enhancing PBAT plastic degradation and reducing nitrogen loss during composting.
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3. 题目: Mg and Fe co-loaded biochar prepared by microwave-synergized K2FeO4 of marine biomass for efficient CO2 capture: Performance assessment and mechanism exploration

文章编号: N24103111
期刊: Chemical Engineering Journal
作者: Juan Luo, Kai Sun, Shichang Sun, Rui Ma, Chongwei Cui, Han Cui
更新时间: 2024-10-31
摘要: To overcome the limitations of complex preparation and suboptimal performance of CO₂ adsorbents, the present work synthesized a polymetallic oxide-loaded biochar (MgO·FeOx@biochar) with good performance in one step using a green and simple method of microwave-synergized K₂FeO₄. MgO·FeOx@biochar-700–10-0.1 with a hierarchical porous structure, abundant adsorption sites and well-distributed basic sites was obtained by optimizing the preparation parameters, which had a good CO₂ trapping performance of 4.92 mol/kg with a retention rate of 83.01 % over 20 cycles, and exhibited good selectivity for O₂ and N₂. CO₂ capture by MgO·FeOx@biochar was predominantly driven by chemical interaction between surface adsorption sites and CO₂, supplemented by microporous filling. The adsorption kinetics revealed that the CO₂ adsorption rate of MgO·FeOx@biochar was influenced by the combined effect of membrane diffusion resistance and intraparticle diffusion resistance. This study established a theoretical basis and technical insight for the environmentally friendly and efficient preparation of high-performance biochar-based CO₂ adsorbents.
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4. 题目: Ultramicropore-rich N-doped porous biochar from discarded cigarette butts for efficient CO2 capture with ultra-high adsorption capacity and selectivity

文章编号: N24103110
期刊: Separation and Purification Technology
作者: Chenxiao Liu, Jieni Wang, Shuqin Zhang, Chenlin Wei, Leichang Cao, Yanmei Zhou, Jinglai Zhang, Shicheng Zhang
更新时间: 2024-10-31
摘要: Carbon dioxide (CO₂) capture is an environmental-technology issue that needs to be solved urgently. In this study, discarded cigarette butts derived N-doped porous biochars (CNPBs) were prepared using ammonium sulfate nitrogen source and mixed salts as N-doping promoters through hydrothermal carbonization and mild pyrolytic activation process. CNPB-2–600 (biochar prepared at 600 °C with KOH ratio of 2) have high CO₂-adsorption capacity (4.93 mmol/g at 1 bar and 25 °C, 6.83 mmol/g at 0°C), high selectivity (CO₂/N₂ = 23.4 at 1 bar and 25 °C), high recycling performance (95.33 % for five cycles), and superior dynamic CO₂ uptake (1.67 mmol/g at 1 bar and 25 °C). The effects of different activation conditions on the pore structure (porosity and specific surface area) and chemical composition (N content and species) of the porous biochar, especially the effect of salt on N-fixation and ultramicropore formation, as well as the mechanism on promoting CO₂ capture were investigated. Super-high ultramicroporosity (V_{(< 1 nm)}/V_{(< 2 nm)}, 95.6 %), advantageous ultramicroporosity (V_{(0.6-0.8 nm)}/V_{(< 1 nm)}, 72.09 %), and N content (6.42 wt%) as well as advantageous N configuration were the contributing factors for the ultra-high adsorption capacity and selectivity. This work demonstrates the potential of converting discarded cigarette butts into functional N-doped carbon materials for efficient CO₂ capture.
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5. 题目: Greater environmental risk of shale gas produced water from lacustrine than marine sources in Fuling shale gas field, China: Insights from inorganic compounds, dissolved organic matter, and halogenated organic compounds

文章编号: N24103109
期刊: Water Research
作者: Hualiang Feng, Yani Lai, Xiaojun Wang, Zhaoji Zhang, Shaohua Chen
更新时间: 2024-10-31
摘要: Lacustrine shale gas represents a promising frontier in the future development of shale gas resources. However, research on the characterization of lacustrine shale gas produced water (SGPW) remains scarce. In this study, we characterized the geochemical properties of both marine and lacustrine SGPW (MSGPW and LSGPW) and assessed their dissolved organic matter (DOM) components using fluorescence EEM spectroscopy. Additionally, we employed Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to analyze halogenated organic compounds (HOCs) and non-HOCs in SGPW, as well as their transformations during storage in open impoundments. Pollutants in LSGPW generally had higher concentrations and greater fluctuations compared to those in MSGPW. Our findings from EEM spectroscopy and FT-ICR MS revealed that phenolic compounds may be important components of DOM in all SGPW. Moreover, the number of detected unique molecules in LSGPW was greater than in MSGPW. CHO or CHOS compounds dominated in non-HOCs, with LSGPW exhibiting generally higher DBE, modified aromaticity index (AI_mod), nominal oxidation state of carbon (NOSC), double bond equivalent minus oxygen per carbon ((DBE-O)/C) values, and lower H/C values compared to MSGPW, while unsaturated aliphatic compounds typically dominated in HOCs. Furthermore, we employed 37 transformation reactions that might occur during SGPW storage and found that oxygen addition and dealkyl group reactions were predominant, with these two types of reactions occurring more frequently in LSGPW than in MSGPW. LSGPW exhibited higher toxicity compared to MSGPW, with toxicity positively correlated with the concentrations of inorganic salts and organic substances with higher AI_mod, NOSC, and (DBE-O)/C. These findings contribute to a more comprehensive understanding of LSGPW, enabling the design and implementation of more rational disposal measures to effectively mitigate its potential environmental risks.
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6. 题目: Efficient peroxymonosulfate activation for practical wastewater treatment by Biochar-Iron oxide composite-based hydrogel beads

文章编号: N24103108
期刊: Chemical Engineering Journal
作者: Zefeng Ruan, Ronghao Wu, Cheng Fu, Hailu Fu, Hai Xiang, Yongfu Li, Zhen Qiu, Bing Yu
更新时间: 2024-10-31
摘要: Developing a highly stable catalyst for advanced oxidation to eliminate organic pollutants from wastewater is of considerable practical importance. In this study, we presented a biochar-iron oxide composite-based hydrogel bead system, designated as Fe₂O₃/BC/CS, designed for the efficient activation of peroxymonosulfate (PMS). Utilizing the degradation of sulfadiazine (SDZ) as a probe, our results revealed that the Fe₂O₃/BC/CS catalyst demonstrated exceptional performance in column tests. It maintained over 80 % SDZ removal efficiency for the first 150 bed volumes and achieved a removal efficiency of 68.4 % even after processing 384 bed volumes of wastewater. Additionally, the Fe₂O₃/BC catalyst achieved over 90 % degradation of three other common organic pollutants (bisphenol A, atrazine, and tetracycline) within 360 min. The degradation efficiency for SDZ reached 98.4 %, with a degradation rate constant (k_obs) of 0.0115 min^–1. After five cycles of 180 min, the SDZ degradation efficiency remained at 68.8 %, further demonstrating its potential for practical applications. Electron paramagnetic resonance analysis and quenching tests indicated that the catalyst-PMS system undergoes a catalytic oxidation process involving both radical and nonradical pathways. Combining the results of electrochemical tests and density functional theory calculations, we discovered that the main pathway for Fe₂O₃/BC to activate PMS involves electron transfer. The positively charged biochar layer was essential to induce PMS to donate electrons to the catalyst, leading to the formation of SO₅^•–, which was subsequently decomposed into ¹O₂. Overall, this study highlights the Fe₂O₃/BC/CS system as a highly effective and versatile catalyst for PMS-based advanced oxidation processes.
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7. 题目: Technical note: Comparison of radiometric techniques for estimating recent organic carbon sequestration rates in inland wetland soils

文章编号: N24103107
期刊: Biogeosciences
作者: Purbasha Mistry, Irena F Creed, Charles G Trick, Eric Enanga, David A Lobb
更新时间: 2024-10-31
摘要: . For wetlands to serve as natural climate solutions, accurate estimates of organic carbon (OC) sequestration rates in wetland sediments are needed. Dating using cesium-137 (137Cs) and lead-210 (210Pb) radioisotopes is commonly used for measuring OC sequestration rates in wetland sediments. 137Cs radioisotope dating is relatively simple, with calculations based on a single point representing the onset (1954) or peak (1963) of the 137Cs fallout. 210Pb radioisotope dating is more complex, as the calculations are based on multiple points. Here, we show that reliable dating of sediment cores collected from wetlands can be achieved using either 137Cs or 210Pb dating or their combination. However, 137Cs and 210Pb profiles along the depth of sediment cores need to be screened, analyzed, and interpreted carefully to estimate OC sequestration rates with high precision. To this end, we propose a decision framework for screening 137Cs and 210Pb profiles into high- and low-quality sediment profiles, and we compare dating using the 1954 and 1963 time markers, i.e., the rates of sedimentation and, consequently, OC sequestration over the past ∼ 60 years. Our findings suggest that 137Cs- and 210Pb-based OC sequestration rates are comparable, especially when using the 1963 (vs. 1954) time marker.
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8. 题目: Copper-doped orange peel biochar activated peroxydisulfate for efficient degrading tetracycline: The critical role of C-OH and Cu

文章编号: N24103106
期刊: Environmental Research
作者: Haochen Li, Haochao Sun, Qiang Li, Xiaofei Zong, Longli Wu, Zhengyu Han, Xinyu Li, Jiahui Wu, Yuxuan Ye, Fei Pan
更新时间: 2024-10-31
摘要: The usage of biomass waste has aroused great concern in water purification. In this study, copper-doped orange peel biochar (Cu-OPB) prepared by one-step carbonization was firstly used to activate peroxydisulfate (PDS) to eliminate tetracycline (TC). The optimized Cu-OPB showed great activation ability for PDS and could degrade 93.7% of TC at pH 9.07. The presence of H₂PO₄⁻, Cl⁻, and HCO₃⁻ did not affect the degradation, while HA and SO₄²⁻ inhibited TC degradation. SO₄^•−, •OH and ¹O₂ were confirmed as the primary active oxygen species in the Cu-OPB/PDS system. Moreover, Cu and the C-OH functional groups on the surface of Cu-OPB played a critical role in the activation by accelerating the electronic migration between Cu-OPB and PDS in the catalytic system. 15 possible intermediate products were found and three feasible degradation pathways were proposed. The toxicity of aquatic organisms of TC was reduced. Furthermore, Cu-OPB could be used as an economically efficient and environmentally friendly catalyst for PDS activation to degrade organic pollutants.
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9. 题目: Environmental Fingerprints of Nonoxygen Heteroatomic Molecules in Aquatic Dissolved Organic Matter Elucidated by Ultra-High-Resolution Mass Spectrometry

文章编号: N24103105
期刊: ACS ES&T Water
作者: Jingjing Sun, Qing-Long Fu, Pingqing Fu
更新时间: 2024-10-31
摘要: The quality and chemodiversity of aquatic dissolved organic matter (DOM), crucial to global carbon cycling and aquatic ecological functions, are affected by microbial and anthropogenic activities. In this study, molecular characteristics of DOM collected from 14 field water samples were compared with three standard samples from the International Humic Substances Society using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Results indicated that microbially and terrestrially derived DOM contributed to the surface water and groundwater DOM pool, with higher DOM molecular lability (higher H/C_iw) in field water than IHSS standards, which was related to the overall impact of diverse biogeochemical processes and anthropogenic factors. The microbial and anthropogenic perturbations contribute more nonoxygen heteroatomic (N, S, and Cl atoms) molecules in the field water, and organic pollutants (surfactants and sucralose) had significant DOM signatures in waters affected by intensive anthropogenic emissions. A strong correlation among microbial indicators, nutrients, and DOM molecular characteristics indicated that the synthetic results of microbial and anthropogenic activities within the basin contributed more nonoxygen heteroatoms and increased the DOM molecular diversity. This study has highlighted the environmental molecular signatures of nonoxygen heteroatoms in reflecting the microbial and anthropogenic factors, shedding new insights into freshwater health.
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10. 题目: Preparation of a slow-release fertilizer from MgO-modified biochar and struvite and its capacity for cadmium passivation

文章编号: N24103104
期刊: Journal of Environmental Chemical Engineering
作者: Zanmei Chen, Defu Xu, Die Wu, Tingtian Lu, Alan Howard
更新时间: 2024-10-31
摘要: This study investigates the development of a slow-release coated fertilizer using magnesium oxide-modified coconut shell biochar (MgO-BC), struvite, and urea. The performance of this coated fertilizer in terms nitrogen and phosphorus release and cadmium (Cd) passivation in Cd-contaminated soil was evaluated through soil column leaching tests and pot experiments. The coated fertilizer, prepared with a mass 6: 2: 1 ratio of MgO-BC: urea: struvite, achieved a compressive strength of 38.6 N/grain. The nitrogen and phosphorus release rates from Cd-contaminated soil treated with the coated fertilizer were 887.391 μg/d and 2.884 μg/d, respectively, representing decreases of 5.0% and 32.8% compared to soil treated with struvite and urea. The coated fertilizer demonstrated a good Cd fixation effect in Cd-contaminated soil. The coated fertilizer effectively reduced Cd mobility, with the total accumulated Cd leached from the soil decreasing by 73.2% after ten leaching cycles. Furthermore, the coated fertilizer significantly inhibited Cd uptake by peas (Pisum sativum L.), with Cd content in the above-ground and under-ground parts of the plants decreasing by 82.78% and 68.04%, respectively, compared to the control. The transport coefficient (TF_S/R) of Cd for peas decreased by 46.12%. The Cd passivation efficiency of the coated fertilizer was 37.76%, attributed to the transformation of acid extractable/exchangeable Cd to residual Cd. These results demonstrate that the coated fertilizer, prepared from MgO-modified biochar and struvite, effectively combines slow releasing nutrient properties with Cd passivation capabilities.
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11. 题目: Molecular insights into Pilot-Scale selective removal of emerging contaminants in hospital wastewater

文章编号: N24103103
期刊: Chemical Engineering Journal
作者: Tianhao Tang, Liangchun Zhang, Shengyin Tang, Wenhui Ding, Kai Yang, Xihui Zhang
更新时间: 2024-10-31
摘要: Advanced oxidation processes (AOPs) are a promising technology for removing emerging organic contaminants (EOCs) from wastewater, while the coexisting dissolved organic matter (DOM) significantly hinders effective oxidative removal of EOCs. Understanding the effects of DOM on EOCs removal in real water matrices is crucial for designing more efficient AOPs. Herein, a pilot-scale integrated in-situ ozonation/ultrafiltration process was conducted to remove EOCs from hospital wastewater. Furthermore, the ozonation reactivity of DOM and EOCs was contrastingly analyzed at the molecular level. Our integrated process selectively removed 85 % of EOCs at a relatively low oxidant dosage of 0.44 mg O₃ per mg dissolved organic carbon (DOC). Using Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS), we reveal that ozone selectivity for EOCs arose from their overall reductive characteristics of being more aromatic and unsaturated in molecular composition compared to DOM. Additionally, specific DOM compounds potentially facilitate EOCs removal. This work provides pilot-scale experience in EOCs removal from hospital wastewater and in-depth understanding of DOM’s role in the integrated process, guiding the development of effective AOPs for selective removal of emerging contaminants.
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12. 题目: The Reverse-reduction Effect of Dissolved Organic Matter on the Degradation of Micropollutants Induced by Halogen radicals (Cl2•- and Br2•-)

文章编号: N24103102
期刊: Water Research
作者: Shuangshuang Cheng, Rui Cui, Yangjian Zhou, Yu Lei, Ni Wang, Yanheng Pan, Xin Yang
更新时间: 2024-10-31
摘要: Reactive halogen radicals (e.g., Cl₂^•- and Br₂^•-) greatly impact the degradation of micropollutants in natural waters and engineered water treatment systems. The ubiquitous dissolved organic matter (DOM) in real waters is known to greatly inhibit the degradation of micropollutants by reducing micropollutant's intermediate (i.e., TC^•+/TC(-H)^•), however, such DOM's effects on the halogen-radical-induced system have not been understood yet. The present study focuses on investigating and quantifying such inhibitory effects of DOM during Cl₂^•-- and Br₂^•--mediated process. Guanosine (Gs) was selected as a model compound. The transient spectra show that Cl₂^•- and Br₂^•- react with Gs generating intermediates (i.e., Gs^•+/Gs(-H)^•) via single-electron transfer. In the presence of 1.0 mg_C L^-1 DOM, over 70% of this oxidized Gs was reduced back to Gs. Comparing the extent of reverse-reduction inhibitory among different reaction systems, this inhibitory in Br₂^•- system was slightly lower than that in Cl₂^•- and SO₄^•- system, corresponding the slightly difference of inhibition factor (IF) values as SO₄^•- < Cl₂^•- < Br₂^•-. The reverse-reduction effect of DOM was further quantified for 19 common micropollutants. It varied significantly with IF values of 0.21–1.26 and 0.28–1.40 in Cl₂^•-- and Br₂^•-- mediated process, respectively. Purines and amines generally exhibited more pronounced inhibition than phenols in both systems. A good correlation of IF values with micropollutant's reduction potential was observed, which can be applied to predict the degradation of more unstudied micropollutants. This study highlights the important role of the reverse-reduction effect of DOM on micropollutant degradation. It can significantly improve the accuracy in predicting degradation rate in advanced oxidation processes for treating water containing halides.
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13. 题目: Biochar affects soil properties over 1 m depth in an alkaline soil of north China Plain.

文章编号: N24103101
期刊: Journal of Environmental Management
作者: Xiongxiong Bai, Jiao Tang, Qingwei Lin
更新时间: 2024-10-31
摘要: Biochar has been shown to enhance soil quality and agricultural yields. Previous studies about biochar's effect on soil properties mainly concentrated on the top 30 cm layer but less on the subsoils. Given the subsoil's active role in climate change mitigation and its significance for nutrient cycling and crop productivity, understanding biochar's effects at depth is crucial. This study explored the responses of soil organic carbon (SOC), total nitrogen, available potassium, available phosphorus, pH, and electrical conductivity to different doses of biochar addition (0, 10, 20, and 30 Mg/ha) over the 1 m depth of alkaline soil. Additionally, the impact of biochar on soil microbial community was assessed in the top 20 cm. Results demonstrated that biochar addition can increase SOC and improve soil properties in deep soil horizons. Specifically, a 30 Mg/ha biochar addition increased SOC by 1.2-10.1 Mg C/ha in the 10-40 cm layer and by 3 Mg C/ha in the 60-80 cm depth over two years. Additionally, biochar addition at this rate increased total nitrogen by 0.2-0.3 g N/kg in the 10-40 cm depth and elevated available potassium across the 1 m profile, with a maximum increment of 313 mg/kg in the surface 10 cm and a minimum of 97 mg/kg in the 40-60 cm depth. While biochar application did not increase available phosphorus, it resulted in a minor decrease in soil pH (<0.7 units) and a slight increase in electrical conductivity. Moreover, biochar addition did not significantly alter the soil microbial community. Our findings underscore the importance of considering subsoils when evaluating biochar's impact on soil properties. We suggest that subsoils should be considered when estimating the potential of cropland management for increasing soil carbon sequestration and improving soil conditions.
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