Water Quality Research Journal
·
2024
·
IF 2.4
Yao Tangchun,Chen Yichao,Wu Wenting,Jin Binbin,Xiao Hua,Wang Qing,Wang Ao,Xu Hang
In this study, we utilized direct ultrafiltration (UF) and integrated microflocculation–ultrafiltration (MF–UF) processes to treat raw water from four distinct sources, covering both dry and heavy rainfall periods. We assessed the effectiveness of microflocculation (MF) as a pretreatment to enhance treatment efficiency under complex water conditions, focusing on its role in mitigating membrane fouling. The results demonstrated the superior adaptability of UF membranes when combined with MF pretreatment, particularly in managing high turbidity during heavy rainfall, a challenge for standalone UF processes in meeting regulatory standards. This integrated approach notably improved UV254 removal efficiency from approximately 60–80%. Additionally, excitation–emission matrix spectroscopy revealed that while the MF–UF process is effective in removing dissolved organic matter (DOM), it faces limitations with high DOM concentrations in raw water. Comparative analysis of membrane flux between the two methods showed that MF pretreatment reduces filtration time, enhances flux rates, and significantly decreases membrane fouling. Finally, scanning electron microscopy further provided insights into the structure and morphology of UF membrane surface filter cakes, illustrating how MF pretreatment contributes to the sustained efficiency of membrane flux. The different water quality conditions were studied. The MF–UF process was studied in realistic conditions. Organic matter and hard particulate matter were studied. Elucidating mechanisms to the MF–UF membrane flux efficiency.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Guodong Wang,Jiahui Li,Wei Zhang,Libin Jiang,Yuhan Mai,Jingyi Chen,Lina Deng,Liyun Chen,Yuxin Lin,Xiumei Li,Huasong Zou,Peng Xu,Longguang Jiang,Cai Yuan,Mingdong Huang
Bacterial infections of plants are widespread and highly virulent, causing serious economic losses in agricultural production worldwide. These infections become particularly prevalent during rainy weather, characterized by high humidity and low light intensity (about 2–10% of a sunny day). Here we identified a class of photosensitizers that were effective in inhibiting plant bacterial infections under rainy weather with dim light. One of these compounds, compound 1 , demonstrated exceptional efficacy by eliminating more than 4 logs (99.99%) of either Xanthomonas perforans or Xanthomonas citri subsp. citri (Xcc) strain at a concentration of 6.25 μM under rainy weather conditions with a light exposure of 28.51 J/cm 2 . For Clavibacter michiganensis ( Cm ), compound 1 demonstrated a comparable bactericidal effect at a lower concentration of 3.13 μM. Furthermore, compound 1 was effective in controlling plant leaf infections during rainy weather. Moreover, compound 1 exhibited a potent inhibitory effect on the biofilms pertinent to tomato spot disease and citrus canker under natural illumination on rainy days. Additionally, compound 1 displayed remarkable resilience to rain-wash on plant leaves, retaining 41.20% of its initial concentration following exposure to three simulated rain events. These findings provide a new strategy for plant pathogen disease management highlight its feasibility even during rainy weather.
研究领域:
植物病理学
·
农学
·
微生物学
·
药理学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yu Zhang,Dong Zhu,Jun Xie,Jiawei Xie,Chaolei Yuan,Xiaojun Shi
The vertical migration behavior of antibiotics in long-term manure-fertilized soils during rainfall remains unclear. Here, we examined antibiotics in soil profiles (0–60 cm) and leachates following each rainfall event throughout a year for three soils (acidic, neutral, and calcareous) with a 13-year history of manure application. The total concentrations of all the antibiotics in the soil profile (11.04–190.32 μg/kg) and the yearly cumulative load of these antibiotics in the leachate (4070–6900 ng/m 2 ) were significantly higher in the acidic and neutral soils than in the calcareous soil. Rainfall caused the migration of antibiotics (especially tetracyclines, quinolones, and sulfonamides) from soil to leachate, while the migration dynamics of some antibiotics differed among the three soil profiles. Random forest analysis revealed that precipitation, soil organic carbon content, pH, sand content, and the partition coefficient ( K ow ) of antibiotics were the key factors influencing the migration of antibiotics. Environmental risk assessment suggested that antibiotics in leachates pose low toxicity risks to aquatic organisms. Nevertheless, the vertical migration of some antibiotics (e.g., sulfachaloropyridazine and sufamerazine) was positively correlated with the dissemination of high-risk antibiotic resistance genes in leachates. This study advances our understanding of the precipitation-caused vertical migration of antibiotics in soil exposed to manure application, considering future increases in severe rainfall events.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Meipeng Jian,Yongjian Che,Mingchen Gao,Xiaoran Zhang,Ziyang Zhang,Chaohong Tan,Haiyan Li
Biochar has been proved as a promising and efficient filler in bioretention facilities for enhancing the stormwater pollutants removal. However, the migration behaviors of stormwater pollutants in biochar filled bioretention facilities is unclear. In this study, as one of the most typical stormwater pollutants, naphthalene was selected as an example and a HYDRUS-1D model was first used to understand the migration behavior of naphthalene in a bioretention facility. In comparison with the conventional bioretention soil media (sandy loam), the amended biochar filled bioretention cell showed that the naphthalene removal rate was enhanced by up to 10.1%. Meanwhile, the experimental data was well-fitted by the “two-site sorption model” in HYDRUS-1D model. Another, the effect of rainfall intensity on the naphthalene migration in both bioretention columns was further investigated. The HYDRUS-1D model fitting indicated that the increase in rainfall intensity promoted naphthalene migration by increasing hydraulic conductivity and water flux. In addition, static batch experiments revealed that the biochar filled fillers achieved about 50% higher adsorption capacity than sandy loam. The sensitivity analysis from the HYDRUS-1D model data verified adsorption coefficient K d and longitudinal dispersivity λ are the main factors affecting naphthalene migration. Finally, the model simulation displays that the proportion of naphthalene retained by the fillers was highest during high rainfall intensities, indicating that the fillers remain the most important fate for naphthalene. This study presents research on the behavior and mechanisms of stormwater pollutant transport through improved bioretention facilities.
研究领域:
环境科学
·
水文学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Microbiology
·
2025
·
IF 4.5
Jia-Long Gao,Xiao-Peng Wu,Yu-Ling Zhou,Wen-Jie Yu,Yu-Guang Fan
Inocybe is a cosmopolitan genus of ectomycorrhizal fungi within the family Inocybaceae. Members of this genus are recognized as a group of toxic mushrooms linked to poisoning incidents worldwide. Clarifying this species diversity and toxin profiles within this genus is critical for both taxonomy and public health. In this study, we describe two newly identified species, I. bicystidiata sp. nov. and I. microcarpa sp. nov., based on phylogenetic analysis and morphological evidence. Phylogenetically, the two new species belong to I. sect. Leptocybe. Inocybe bicystidiata is characterized by nodulose basidiospores with saddle-shaped projections and the coexistence of thick-walled pleurocystidia and thin-walled paracystidia on the lamellar side. Inocybe microcarpa is characterized by very small basidiomata, spinose basidiospores with forked projections, absence of pleurocystidia, and thin-walled cheilocystidia. Ecologically, both of these new species occur in tropical rainforests dominated by Parashorea chinensis, which is considered as their presumed host. In addition, new geographic data are reported for three previously documented species of I. sect. Leptocybe, I. acutata, I. juji, and I. peppa, based on newly obtained specimens. Comprehensive ultra-performance liquid chromatography-mass spectrometry (UPLC–MS)/MS toxin screening revealed no detectable levels of muscarine, psilocybin, psilocin, bufotenine, or baeocystin in 10 examined species of sect. Leptocybe. This contrasts with the known toxin-producing Inocybe lineages, suggesting a divergent secondary metabolism in this clade.
研究领域:
真菌学
·
生态学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Yongteng Zhao,Qingqing Li,Dan Chen,Min Yang,Feiyan Huang,Jiani Liu,Xuya Yu,Lei Yu
Dopamine (DA) has attracted attention because of its effects on Haematococcus lacustris biomass, astaxanthin production, and physiological responses. The alga treated with 25 μM DA combined with 1 g L –1 sodium chloride exhibited 7.63 %, 41.25 %, and 52.04 % increases in biomass (1.41 g L –1 ), astaxanthin content (32.37 mg/g), and astaxanthin productivity (3.51 mg L –1 d –1 ) respectively, compared with the salinity stress and high light. Exogenous DA treatment promoted lipid synthesis while reducing carbohydrate and protein contents. Moreover, carotenogenesis and lipogenesis-associated genes were upregulated under DA induction. Inhibition of reactive oxygen species and autophagy, along with mitogen-activated protein kinase activation, promoted astaxanthin accumulation under DA. Furthermore, DA application boosted astaxanthin biosynthesis by regulating the levels of respiratory metabolic intermediates, the γ-aminobutyric acid shunt, and important phytohormones. These findings present a potential and successful biotechnological approach for enhancing biomass and astaxanthin production in H. lacustris under stressful conditions.
研究领域:
藻类生物学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lin Cong,Mingchen Gao,Meipeng Jian,Fuguo Qiu,Yongjian Che,Xiaoran Zhang,Ziyang Zhang,Chaohong Tan,Haiyan Li
Conventional bioretention systems exhibit limited efficacy in benzotriazole removal from stormwater runoff due to the compound’s high solubility and mobility. Here, this study investigated the efficient removal of benzotriazole from urban stormwater using porous carbonized wood (PCW) in bioretention columns. Derived from Basswood through CO₂ activation, PCW exhibited a high specific surface area (511 m²/g) and rapid adsorption equilibrium (5 h), with a maximum adsorption capacity of 175.12 mg/g for benzotriazole. Column experiments demonstrated that granular PCW (4 mm particle size) achieves > 95 % benzotriazole removal under varying hydraulic conditions (influent concentrations: 5–15 mg/L), while powdered PCW showed near-complete removal (∼100 %). However, granular PCW significantly enhanced hydraulic conductivity (52.5 mL/min vs. 5.5 mL/min for powdered PCW), effectively mitigating clogging risks. The CO₂ activation process enhanced mesopore formation and surface functionality, facilitating adsorption via hydrogen bonding and electrostatic interactions. Compared to conventional biochar and sand, PCW demonstrated superior selectivity and stability across pH (3–11) and coexisting ions. Granular PCW balanced high contaminant removal with optimal hydraulic performance, offering a sustainable solution for stormwater treatment. In the end, this work highlights the potential of granular PCW as a scalable, efficient amendment in bioretention systems to address persistent organic pollutants in urban runoff.
研究领域:
环境科学
·
水处理技术
·
环境工程
·
吸附材料
·
城市水文学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-9
·
IF 4.011
Shao Yongni,Gu Weimin,Jiang Linjun,Zhu Yiming,Gong Aiping
As an ideal raw material for the production of astaxanthin, H . pluvialis was drawing attention during the last few years, there are some research topics initiated to find out the synthetic pathway of astaxanthin in H . pluvialis . In this study, confocal microscopic Raman technology was utilized to analyze the point-by-point mapping for H . pluvialis , and the visualization of pigment such as carotenoid and astaxanthin content were achieved. By comparing the Raman spectra of H . pluvialis and standard product of astaxanthin, and using the C = C stretching vibration of the Raman intensity as the main indicator for carotenoids, the visual spatial distribution for the carotenoids content was obtained. The MCR-ALS was applied to analyze the Raman data of H . pluvialis , and the information of astaxanthin was extracted to achieve real-time spatial distribution. The visualization of astaxanthin content shows that MCR-ALS is very effective for extracting the information of astaxanthin content from H . pluvialis . By exploring the spatial distribution of carotenoids and astaxanthin contents, analyzing the spatial distribution rules during its growth, Raman spectroscopy technology can be utilized to investigate the internal components of the pigment (ataxanthin, etc.) in H . pluvialis , which make it as an effective methodology to monitor the accumulation and changing mechanism of pigment content in microalgae.
研究领域:
生物化学
·
光谱学
·
藻类研究
✓ 已验证
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2022
·Vol. 86
·期 11
·2963-2973
·
IF 2.43
Li Ting,Zuo XiaoJun,Zhang SongHu,Kong QingGang
Recently, increasing attention has been paid to antibiotic resistance in stormwater runoff. However, there is no available literature about the control of antibiotic resistant bacteria (ARB) through 365 nm ultraviolet light-emitting diode (UVA/LED). In this study, batch experiments were conducted to investigate ARB inactivation kinetics, effects of light intensity and water matrix (including suspended solid (SS) concentration, initial pH and bacteria concentration), and potential transmission risks after UVA/LED irradiation. Results showed that ARB inactivation efficiencies reached 6.31 log reduction at 8 mW/cm 2 (86 J/cm 2 ) of UVA/LED for 180 min. ARB inactivation efficiencies increased with the increase of light intensity, and showed a linear relationship. ARB inactivation decreased with increasing SS levels, and the largest inactivation efficiencies was 3.56 log reduction at 50 mg/L of SS. Initial pH had slight effect on ARB inactivation through UVA/LED irradiation. A low initial bacteria concentration (10 5 CFU/mL) was not necessarily associated with good ARB inactivation (3.59 log reduction). After UVA/LED irradiation, ARB was hardly detected during 12 hr of dark repair, and the transfer frequency of kanamycin resistance gene was increased to 5.43 × 10 −4 . These suggested that the application of UVA/LED to inactivate ARB in stormwater runoff was feasible and desirable in this study. ARB inactivation reached 6.31 log reduction at 8 mW/cm 2 of UVA/LED for 180 min. UVA/LED inactivation kinetics could be well described by the first-order model. Initial pH and bacteria levels had weak effects for ARB inactivation. Potential risks of ARB could be blocked after 60 min of UVA/LED disinfection.
研究领域:
环境科学
·
微生物学
·
公共卫生
·
水利工程
✓ 已验证
DOI
高影响因子
Energy Advances
·
2024
·
IF 3.2
Yi Zheng,Hongyu Zheng,Yuanchong Yue,Liying Lu,Yingli Wang,Qunwei Tang
Harnessing waste green energy utilizing advanced energy conversion technologies is widely considered a promising avenue for enhancing the power generation capacity of renewable energy. In this study, we present the experimental realization of a tailored energy conversion device using graphene-carbon black/polyvinyl chloride (G-CB/PVC) composite films for the innovative harvesting of rainwater energy. Based on the cyclic charge–discharge behaviors of electron/cationic pseudocapacitance at the film–raindrop interface, periodic current and voltage signals were generated with maximum values exceeding 2.5 μA and 100 μV per droplet by optimizing the concentrations and species of cations, respectively. Electricity outputs were significantly enhanced by increasing the electron concentration in the composite films. It is noteworthy that rainwater energy-harvesting devices exhibit exceptional long-term stability, enduring persistent attacks posed by continuous simulated rainfall conditions.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Xiaoting Zhang,Yingxin Chen,Xinyu Li,Yalin Zhang,Wei Gao,Jie Jiang,Aoyun Mo,Defu He
Agricultural soil is a sink of microplastics (MPs) in the environment. MPs in topsoil can be transferred deeply or into surrounding water by rainfall. However, little is known about rainfall-induced migration pattern of different MPs in agricultural soil. In this study, soil leaching experiments of 21 d were performed on Nile red-stained size-different polyethylene terephthalate (PET) particles, and shape-different polyethylene (PE) MPs under simulated or natural rainfall. Results showed that simulated rainfall of 5–25 mm/d caused intensity-dependent migration of MPs in horizontal and vertical directions. Maximum migration depth of MP particles arrived up to 4–7 cm. Rise of soil slopes could significantly increase horizontal mobility of MPs. Comparatively, natural rainfall of similar intensity caused relatively high mobility of MPs. Moreover, under both simulative and natural rainfall, mobility of MPs presented size/shape-different characteristics. Comparatively, small-size MPs (especially <1 mm) showed relatively high mobility in horizontal or vertical direction, and had high-frequency presence in runoff water . Of four MPs' shapes, fiber and film had relatively high mobility in comparison to particles. These results indicate that rainfall can cause size/shape-dependent migration of MPs in agricultural soil. It suggests size/shape-different environment fate of MPs, and provides a reference for MP control.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
PubMed
高影响因子
AQUACULTURE
·
2021
·
IF 4.242
Feichao Du,Chaoyang Hu,Xue Sun,Liuquan Zhang,Nianjun Xu
Some organic carbons were able to further promote astaxanthin accumulation in Haematococcus pluvialis under stress conditions. In this study, we demonstrate that adding 0.6 mM trisodium citrate (TSC) into the culture media increased astaxanthin content in the single cell by 2.4 folds and increased astaxanthin yield by 11.9% in H. pluvialis at day 7 under high light stress. In addition, the ROS level, which was highly associated with astaxanthin accumulation, was also increased by TSC. Subsequent comparative transcriptomic analysis revealed the mechanism underlying the promoting effect of trisodium citrate on astaxanthin accumulation. TSC treatment up-regulated significantly the expression of many enzyme encoding genes involved in TCA cycle, glucose metabolism, astaxanthin biosynthesis and fatty acids metabolism . In addition, trisodium citrate treatment significantly changed the expression of genes involved in ROS scavenging and cell wall biosynthesis. Our results indicated that TSC can not only be used as a carbon source but also further increase the ROS level in H. pluvialis under high light stress. Collectively, this study provides a new method that can increase astaxanthin yield, but also insights into the mechanism of trisodium citrate-induced astaxanthin biosynthesis in H. pluvialis under high light.
研究领域:
生物化学
·
植物生理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）