ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Jian Zhao,Qiaojuan Wang,Yangrui Huang,Shangbiao Fang,Gang Liu,Weixiao Qi,Yaohui Bai,Walter van der Meer,Jiuhui Qu,Huijuan Liu
Organic micropollutants (OMPs) facilitate the spread of antibiotic resistance genes (ARGs). Ammonia-oxidizing microorganisms (AOMs) are crucial for OMP degradation during riverbank filtration (RBF) and significantly influenced by NH4+-N concentrations. However, the effect of NH4+-N on OMP removal and ARG occurrence in RBF remains unclear. This study aimed to examine the effects of low (∼0.1 mg/L) and high (∼2.2 mg/L) NH4+-N concentrations on OMP removal, ARG occurrence, and microbial communities. NH4+-N addition had no significant effect on the removal of 108 out of 128 OMPs, suggesting that other factors primarily govern the removal process. Notably, NH4+-N addition enhanced the removal of 20 OMPs by 3–70%, including three quinolones (e.g., flumequine), indicating its promotion of specific OMP removals. This effect may primarily result from NH4+-N enhancing OMP biotransformation through the stimulation of AOMs (particularly AOA and comammox) and heterotrophs (e.g., Bradyrhizobium). Furthermore, NH4+-N addition significantly reduced the abundance of eight ARGs, including quinolone ARGs, likely due to its inhibition of antibiotic-resistant bacteria. Additionally, we hypothesize that NH4+-N alleviates OMP selective pressure on microorganisms by promoting OMP conversion through AOMs. This study enhances the understanding of microbe-mediated OMP removal in the presence of NH4+-N and its impact on ARG occurrence during RBF.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Youwei Yang,Jianxing Wang,Yan Gao,Xuekun Tang,Chunying Wang,Xianping Luo
ZnFe 2 O 4 catalysts synthesized via hydrothermal (ZFO-H) and sol-gel (ZFO-S) methods were employed to activate peroxodisulfate (PDS) under UV light for the efficient conversion of low-concentration NH 4 + -N into environmentally benign N 2 , offering a promising solution for advanced wastewater treatment. Characterization revealed that the sol-gel-derived ZFO-S exhibited uniform agglomeration, smooth surfaces, and an 80% reduction in surface hydroxyl density (as indicated by the FTIR peak area at 3320 cm -1 ), outperforming both hydrothermally prepared and commercial ZnFe₂O₄ (ZFO-H and ZFO-M, respectively). This study addresses the critical challenge of ammonia nitrogen removal in wastewater, where conventional methods often struggle with low efficiency or secondary pollution. Mechanistic studies demonstrated that ZnFe 2 O 4 facilitated electron transfer at Zn sites to activate PDS, generating reactive species dominated by singlet oxygen ( 1 O 2 ), which drove NH 4 + -N oxidation. Density functional theory (DFT) calculations further elucidated the reaction pathway, highlighting preferential adsorption of NH 3 at oxygen sites on the ZnFe 2 O 4 (311) surface, followed by sequential dehydrogenation and coupling to form N 2 . Under optimal conditions (pH >9.25, 10 mM PDS, 25°C, 3 h), 97.40% of initial 50 mg/L NH₄ + -N was converted to N₂, with negligible NO 3 − byproduct formation (< 6%), demonstrating high feasibility for practical wastewater remediation. The reduced surface hydroxyl groups and lower work function of ZFO-S enhanced electron transfer, underscoring its superior catalytic activity. This work provides a novel strategy for designing hydroxyl-regulated photocatalysts tailored for wastewater treatment and advances the mechanistic understanding of persulfate-based ammonia nitrogen remediation in engineered water systems.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yangyang Gong,Pengtao Zhang,Shuang Fan,Minghui Cai,Jiangtao Hu,Zhaoyan Luo,Hongwei Mi,Xiantao Jiang,Qianling Zhang,Xiangzhong Ren
Ammonium vanadate with stable bi-layered structure and superior mass-specific capacity have emerged as competitive cathode materials for aqueous rechargeable zinc-ion batteries (AZIBs). Nevertheless, fragile N H…O bonds and too strong electrostatic interaction by virtue of excessive NH 4 + will lead to sluggish Zn 2+ ion mobility, further largely affects the electro-chemical performance of ammonium vanadate in AZIBs. The present work incorporates polypyrrole (PPy) to partially replace NH 4 + in NH 4 V 4 O 10 (NVO), resulting in the significantly enlarged interlayers (from 10.1 to 11.9 Å), remarkable electronic conductivity, increased oxygen vacancies and reinforced layered structure. The partial removal of NH 4 + will alleviate the irreversible deammoniation to protect the laminate structures from collapse during ion insertion/extraction. The expanded interlayer spacing and the increased oxygen vacancies by the virtue of the introduction of polypyrrole improve the ionic diffusion, enabling exceptional rate performance of NH 4 V 4 O 10 . As expected, the resulting polypyrrole intercalated ammonium vanadate (NVOY) presents a superior discharge capacity of 431.9 mAh g −1 at 0.5 A g −1 and remarkable cycling stability of 219.1 mAh g −1 at 20 A g −1 with 78 % capacity retention after 1500 cycles. The in-situ electrochemical impedance spectroscopy (EIS), in-situ X-ray diffraction (XRD), ex-situ X-ray photoelectron spectroscopy (XPS) and ex-situ high resolution transmission electron microscopy (HR-TEM) analysis investigate a highly reversible intercalation Zn-storage mechanism, and the enhanced the redox kinetics are related to the combined effect of interlayer regulation, high electronic conductivity and oxygen defect engineering by partial substitution NH 4 + of PPy incorporation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Metabolites
·
2022
·Vol. 12
·期 5
·444
·
IF 5.581
Muhammad Khalid Hameed,Wajid Umar,Ali Razzaq,Tariq Aziz,Muhammad Aamer Maqsood,Shiwei Wei,Qingliang Niu,Danfeng Huang,Liying Chang
Nitrogen (N) is an essential element for plant growth and development. The application of a balanced and optimal amount of N is required for sustainable plant yield. For this, different N sources and forms are used, that including ammonium (NH4+) and nitrate (NO3−). These are the main sources for N uptake by plants where NH4+/NO3−ratios have a significant effect on the biomass, quality and metabolites composition of lettuce grown in soil, substrate and hydroponic cultivation systems. A limited supply of N resulted in the reduction in the biomass, quality and overall yield of lettuce. Additionally, different types of metabolites were produced with varying concentrations of N sources and can be used as metabolic markers to improve the N use efficiency. To investigate the differential metabolic activity, we planted lettuce with different NH4+/NO3−ratios (100:0, 75:25, 50:50, 25:75 and 0:100%) and a control (no additional N applied) in soil, substrate and hydroponic cultivation systems. The results revealed that the 25% NH4+/75% NO3−ratio increased the relative chlorophyll contents as well as the biomass of lettuce in all cultivation systems. However, lettuce grown in the hydroponic cultivation system showed the best results. The concentration of essential amino acids including alanine, valine, leucine, lysine, proline and serine increased in soil and hydroponically grown lettuce treated with the 25% NH4+/75% NO3−ratio. The taste and quality-related compounds in lettuce showed maximum relative abundance with the 25% NH4+/75% NO3−ratio, except ascorbate (grown in soil) and lactupicrin (grown in substrate), which showed maximum relative abundance in the 50% NH4+/50% NO3−ratio and control treatments, respectively. Moreover, 1-O-caffeoylglucose, 1,3-dicaffeoylquinic acid, aesculetin and quercetin-3-galactoside were increased by the application of the 100% NH4+/0% NO3−ratio in soil-grown lettuce. The 25% NH4+/75% NO3−ratio was more suitable in the hydroponic cultivation system to obtain increased lettuce biomass. The metabolic profiling of lettuce showed different behaviors when applying different NH4+/NO3−ratios. Therefore, the majority of the parameters were largely influenced by the 25% NH4+/75% NO3−ratio, which resulted in the hyper-accumulation of health-promoting compounds in lettuce. In conclusion, the optimal N applications improve the quality of lettuce grown in soil, substrate and hydroponic cultivation systems which ultimately boost the nutritional value of lettuce.Keywords:ammonium;lettuce;metabolites;nitrogen;nitrate
研究领域:
农业
·
植物科学
·
代谢组学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Yulin Zhang,Xiteng Li,Dongjie Yang,Hu Cai,Ziqi Ma,Yu Zhang,Suihan Cui,Zhongzhen Wu
Herein, the three-dimensional (3D) flower-like pigments of micro-nano scaled zinc phosphate (FZP) and ammonium zinc phosphate (FNZP) were successfully synthesized by hydrothermal synthesis method for improving the corrosion resistance of waterborne epoxy (WEP) coating. The micro-structures, chemical compositions and corrosion resistance of the as-obtained specimens were characterized by SEM, XRD, FT-IR, XPS and EIS, respectively. The results indicated that the 3D flower-like FZP and FNZP pigments were comprised of self-assembled nano-micro sheets with an average thickness of 20 nm ∼ 100 nm. Moreover, the remarkable enhancements of compactness and anticorrosion performance, especially for the FNZP-incorporated coating, were principally contributed to the well dispersibility and favourable solubility, which lengthened the permeation pathway and promoted the formation of passivation film.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Jianlong Huang,Fengjiao Guo,Zhiyong Guo,Jianbang Chen,Bin Dai,Feng Yu
A series of ammonium-containing fluoroiodates, NH4IO2F2 and (NH4)3(IO2F2)3·H2O, with isolated [IO2F2] units have been fabricated by a fluorine-oxygen substitution strategy from NH4IO3. The two compounds crystallize in the orthorhombic system, but in different space groups, noncentrosymmetric Pca21 for NH4IO2F2 and centrosymmetric Pnma for (NH4)3(IO2F2)3·H2O, and show wide band gaps of 4.53 eV for (NH4IO2F2) and 4.55 eV for ((NH4)3(IO2F2)3·H2O). In addition, NH4IO2F2 exhibits a 1.2 × KDP second harmonic generation response, a short ultraviolet cutoff edge in iodates, and a good crystal growth habit. The crystal of NH4IO2F2 with a size of 11 × 5 × 2 mm3 was obtained by the aqueous solution method. The results enrich the structural diversity of iodate and supply a greater understanding of the design of new functional materials based on the fluoroiodates.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Yining Ma,Huaijuan Zhou,Jingting Zhu,Shidong Ji,Shanhu Bao,Rong Li,Ping Jin
Flake-like VO 2 (M) has been successfully synthesized by annealing plate-like (NH 4 ) 0.6 V 2 O 5 in vacuum and its thermochromicity was investigated. Preparation conditions such as temperature and vacuum degree have been varied to obtain the pure phase. The formation mechanism from ammonium vanadium bronze to VO 2 (M) has been explored. The flake-like VO 2 (M) shows an excellent thermochromicity; the infrared modulation at 2500 nm was up to 56.6% with a 30% visible transmittance which will be beneficial for smart windows, smart curtains or other applications.
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Qiu-Yue Zheng,Xiao-Li Cheng,Jing Tang,Ting-Ting Wang,Xian-Fa Zhang,Li-Hua Huo,Chao-Bo Huang,Zoltán Major,Yong-Sheng Zhang,Peng-Jin Ye,Ying-Ming Xu
en Introducing oxygen vacancies has emerged as an essential strategy to affect the sensing properties of nanomaterials. However, existing methods for manipulating oxygen require high cost, complex operation, and harsh conditions. Herein, a simple NH 4 + -assisted heat treatment approach was designed to regulate the concentration of oxygen vacancies of ammonium tungsten bronze ((NH 4 ) 0.25 WO 3 , named as NWO). The resultant NWO-300 sensor exhibited an extremely high response of 118 to 1 ppm NO 2 at 40°C. It achieved a detection limit as low as 10 ppb. Such outstanding sensing properties of NWO-300 were ascribed to the modulated electronic structure and increased active sites caused by oxygen vacancies. The formation of a large number of oxygen vacancies in NWO-300 is due to the H and N atoms in NH 3 can extract O atoms on the surface of materials, which was confirmed by X-ray photoelectron spectroscopy (XPS) and thermogravimetric-mass spectrometry (TG-MS) techniques. Moreover, the excellent NO 2 detection ability of the NWO-300 sensor enables the detection of air quality under different floors, and its development can be utilized in the field of environmental monitoring applications. 摘要 zh 引入氧空位已成为影响纳米材料传感性能的一项关键策略。然而, 现有调控氧空位的方法成本高昂、操作复杂且条件苛刻。因此, 设计了一种简单的NH 4 + 辅助热处理方法来调节铵钨青铜 ((NH 4 ) 0.25 WO 3 , 命名为NWO) 中氧空位的浓度。制备的NWO-300传感器在40 °C时对1 ppm 的NO 2 显示出高达118的响应, 其检测限低至10 ppb。NWO-300传感器如此出色的传感性能归因于氧空位所导致的电子结构的调节和活性位点的增加。NWO-300中大量氧空位的形成是由于NH 3 中的H和N原子可以从材料表面提取O原子, 这一点通过XPS和TG-MS技术得到了证实。此外, 由于NWO-300传感器出色的NO 2 检测能力使其能够检测不同楼层的空气质量, 其开发可用于环境监测领域。
研究领域:
材料科学
·
气体传感
·
纳米材料
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2023
·
IF 2.2
Shunye Yu,Yi Shui,Shuo Liu,Gan Huang,Canxiao Huang,Chunhui Geng,Lili Liu,Hongming Liu
Two co-crystalline compounds containing telluric acid and iodate, namely AIO 3 ·H 6 TeO 6 (A = Rb + , NH 4 + ), were investigated as potential nonlinear optical materials. They crystallize into isostructural and consist of isolated [IO 3 ] group and [H 6 TeO 6 ] molecule linked by hydrogen bonds and charge interactions of Rb + /NH 4 + . They show phase-matching second harmonic generation responses with moderate intensity of 1.2 × KDP (Rb + ) and 1.1 × KDP (NH 4 + ). They also possess large optical band gaps over 4.25 eV and can be easily grown from aqueous solutions. The local dipole moment calculations based on the structures of AIO 3 ·H 6 TeO 6 (A = K + , Rb + , NH 4 + ) series of compounds indicate that the change of A + cation in their structural frame causes a slight change in the arrangement directions of [IO 3 ] and [Te(OH) 6 ] groups, and further induces their SHG responses of different intensities at the macroscopic level.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
DOI
高影响因子
Silicon
·
2026
·
IF 3.3
Idowu Peter Babatunde,Wang Xiaohui,Ma Shuhua,Oduye Temitope Gabriel
A new process for the controlled-synthesis of large surface area mesoporous silica nanoparticles (MSNs) from the unique (NH 4 ) 2 SiF 6 -NH 4 F solution produced from coal fly ash was developed using template assisted rapid chemical precipitation method. This work achieved the synthesis of MSNs with specific surface area (SSA) (~ 500 m 2 /g—1064 m 2 /g), small particle size (~ 90 nm- 133 nm) with narrow pore size distribution ranging between (7.56 nm- 20.11 nm) and reduced agglomeration condition by proposing a unique reactant’s feeding pattern and studying other parameters aiding the controlled synthesis process. The effect of high concentration fluoride ion on cationic cetyltrimethylammonium bromide (CTAB) template was also investigated. A novel CTAB removal method from the highly porous cavities of the silica nanoparticles under mild conditions was proposed. At 50 °C and atmospheric pressure, the foam fractionation technique showed 61% efficiency of CTAB removal while maintaining the porous structure and surface silanol of the particles compared with the traditional calcination method, providing green, economic and sustainable method for surfactant removal in MSNs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xingchen Xie,Ni Wang,Liangkui Sun,Baolong Sun,Li Zhong,Lixiang He,Sridhar Komarneni,Wencheng Hu
The practical application of zinc ion batteries (ZIBs) can be facilitated by designing cathode materials with unique structures that can overcome the critical problems of slow reaction kinetics and large volume expansion associated with the intercalation reaction of divalent zinc ions. In this study, a novel urchin-like (NH 4 ) 2 V 10 O 25 ·8H 2 O assembled from nanorods was synthesized by a simple hydrothermal method, noted as U-NVO. The interlayer organic pillar of cetyltrimethylammonium cation (CTAB) has been intercalated between layers to regulate the interlayer microstructure and expand the interlayer spacing to 1.32 nm, which effectively increased the contact between the electrode and electrolyte interface and shortened the diffusion path of electrolyte ions. The interlayer pillars of structural H 2 O and NH 4 + provide a flexible framework structure and enhance the cohesion of the layered structure, which helps to maintain structural stability during the charging and discharging process, resulting in long-term durability. These unique properties result in the U-NVO cathodes demonstrating high specific capacity (401.7 mA h g −1 at 0.1 A g −1 ), excellent rate capability (99.6 % retention from 0.1 to 5 A g −1 and back to 0.1 A g −1 ), and long-term cycling performance (∼87.5 % capacity retention after 2600 cycles). These results offer valuable insights into the design of high-performance vanadium oxide cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Water
·
2025
·Vol. 17
·期 2
·179
·
IF 3
Wei Xu,Xiaoping Zhang,Guichang Zhang,Xin Zhang
The treatment of wastewater using microalgae is regarded as a green and potential technology. However, its engineering application has been largely hindered because of the limitation of microalgae separation and harvesting. Therefore, immobilization technology has been widely used to embed microalgae for wastewater treatment. In this paper, sodium alginate (SA) and polyvinyl alcohol (PVA) as the common immobilized carriers were used to immobilizeankistrodesmus falcatusfor simulated slaughtering wastewater (SSW) treatment. The experimental results of the mass transfer and adsorption of immobilized carriers were found to show that the mass transfer of SA-SiO2gel balls (SS-GB) was better than PVA-SA gel balls (PS-GB) and that the adsorption of PS-GB was better than SS-GB. When immobilizing microalgae with the two kinds of carriers, it was found that SA-SiO2microalgal spheres (SS-MS) were better than PVA-SA microalgal spheres (PS-MS) for the maintenance of microalgal cell activity and that PS-MS were better than SS-MS for the resistance to biodegradation. This is because the carrier of PS-MS had a thick shell and dense structure, while the carrier of SS-MS had a thin shell and loose structure. The results of SSW treatment by PS-MS and SS-MS were found to show that the total phosphorus (TP) removal rates of PS-MS and SS-MS were 90.31% and 86.60%, respectively. This indicates that the TP removal effect of PS-MS was superior to that of SS-MS. The adsorption kinetics simulation showed that the adsorption of TP onto PS-GB was controlled by chemisorption and that the adsorption of TP onto SS-GB was controlled by physical adsorption. The chemical oxygen demand (COD) and ammonium nitrogen (NH4+-N) removal of PS-MS were 9.30% and 10.70%, respectively, and the COD and NH4+-N removal of SS-MS were 54.60% and 62.08%, respectively. This indicates that the COD and NH4+-N removal effect of SS-MS were superior to PS-MS. This is the result of the combined action of the degradation by microalgal cells and adsorption by the carrier.
研究领域:
环境科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）