ENVIRONMENTAL POLLUTION
·
2025
·
IF 7.3
Xiaokang Luo,Meng Zhang,Qing Wang,Zhanpeng Wei,Mukhtiar Ali,Shirui Dong,Xin Song
Polycyclic aromatic hydrocarbons (PAHs) and arsenic (As) co-contaminated soil has emerged as a significant environmental concern. In this study, the performance and underlying mechanisms of integrated thermal and biostimulant enhanced bioremediation (ITBEB) of PAHs and As co-contaminated soil by an indigenous microbial consortium were explored. The results demonstrated that thermal treatment with temperatures elevated from 25°C to 55°C, in combination with biostimulants of rhamnolipids or yeast extract, improved the bioremediation efficiency of both PAHs and As. The highest bioremediation efficiency, 69.03% for total PAHs and 17.69% for As, were achieved at 55°C with the addition of yeast extract, compared to 39.85% and 8.69%, respectively, at 25°C without biostimulants. During the ITBEB process, the indigenous microbial consortium was capable of simultaneously degrading PAHs and transforming inorganic As into less toxic volatile forms via methylation. Notably, the abundance of functional bacteria, such as Bacillus , increased substantially from 8.29% initially to 63.71% at 55°C with yeast extract, contributing significantly to the enhanced bioremediation efficiency. Furthermore, the highest abundances of functional genes PAH-RHDα and arsM were observed at 35°C with biostimulants, whereas their expression declined at higher temperatures of 45°C and 55°C. This observation, combined with the results of correlation analyses, indicated that the effectiveness of bioremediation was strongly influenced by the presence of functional bacteria and their associated genes, as well as environmental factors such as iron content, pH, and soil organic matter. Overall, this study provides valuable insights into the synergistic effects of thermal treatment and biostimulants in the bioremediation of PAHs and As co-contaminated soils, offering a foundation for the development of more effective and sustainable remediation strategies.
研究领域:
环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 14
·16646-16655
·
IF 3.056
Zhu Meng,Luo Yongming,Cheng Nannan,Yang Ruyi,Zhang Juqin,Zhang Mengyun,Christie Peter
Diphenylarsinic acid (DPAA) is an emerging phenylarsenic compound derived from chemical warfare agents. It has been suggested that biostimulation of sulfate reduction decreases the concentrations of DPAA in soils. However, biostimulation often induces Fe(III) reduction which may affect the mobility and thereby the transformation of DPAA. Here, a soil incubation experiment was carried out to elucidate the impact of Fe(III) reduction on the mobilization and transformation of DPAA in a biostimulated Acrisol with the addition of sulfate and lactate. DPAA was significantly mobilized and then thionated in the sulfide soil (amended with sulfate and sodium lactate) compared with the anoxic soil (without addition of sulfate or sodium lactate). At the start of the incubation period, 41.8% of the total DPAA in sulfide soil was mobilized, likely by the addition of sodium lactate, and DPAA was then almost completely released into the solution after 2 weeks of incubation, likely due to Fe(III) reduction. The relatively low fraction of oxalate-extractable Fe in Acrisol, which contributes significantly to DPAA sorption and is more active and reduction-susceptible, may explain the observation that only < 40% of the Fe(III) (hydr)oxides were reduced when DPAA was completely released into the solution. A more rapid and final enhanced elimination of DPAA was observed in sulfide soil and the fraction of total DPAA decreased to 60.1 and 91.0%, respectively, at the end of the incubation in sulfide soil and anoxic soil. The difference appears to result from increased DPAA mobilization and sulfate reduction in sulfide soil. On the other hand, the formation of FeS precipitate, a product of Fe and sulfate reduction, may reduce the efficiency of DPAA thionation. Accordingly, the potentially contrasting effects of Fe(III) reduction on DPAA thionation need be considered when planning biostimulated sulfate reduction strategies for DPAA-contaminated soils.
研究领域:
环境科学
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土壤学
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污染修复
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2023
·
IF 6.1
Shunyao Li,Yuehui Sheng,Shenghua Xiao,Qingzhu Liu,Kai Sun
Exolaccase-propelled humification (E-PH) helps eliminate phenolic pollutants and produce macromolecular precipitates. Herein, we investigated the influencing mechanism of 12 humic precursors (HPs) on exolaccase-enabled bisphenol A (BPA) decontamination and humification. Catechol, vanillic acid, caffeic acid, and gentian acid not only expedited BPA removal but also created large amounts of copolymeric precipitates. These precipitates had rich functional groups similar to natural humic substances, which presented great aromatic and acidic characteristics. The releasing amounts of BPA monomer from four precipitates were 0.08–12.87% at pH 2.0–11.0, suggesting that BPA-HP copolymers had pH stability. More excitingly, certain copolymeric precipitates could stimulate the growth and development of radish seedlings. The radish growth-promotion mechanisms of copolymers were involved in two aspects: (1) Copolymers interacted with root exudates to accelerate nutrient uptake; (2) Copolymers released auxins to provoke radish growth. These results may provide an innovative strategy for decontaminating phenolic pollutants and yielding humic-like biostimulants in E-PH.
研究领域:
环境科学
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生物化学
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植物学
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DOI
PubMed
高影响因子
Water
·
2024
·Vol. 16
·期 13
·1910
·
IF 3
Luxuan Feng,Xiaofeng Chen,Jinghua Yao,Lei Xiao,Xiujuan Feng,Shengmin Wu
Heavy metal pollution in the soil around bauxite mines, especially cadmium pollution, is becoming more and more severe due to this mining becoming more frequent. Therefore, it is urgent to develop green and safe remediation technology. Biostimulants have been studied extensively, but their practical application is still challenging. In this study, the effects of humic acid (HA), glucose (GLU), and tetrasodium glutamate diacetate (GLDA), as well as their synergistic complex bacterial flora, on Cd-contaminated soil were analyzed. It has been shown that applying these three types of stimulants, individually or with complex bacterial flora, can enhance soil environment and quality. Nevertheless, the remediation efficacy of stimulants in combination with microbial communities surpasses that achieved through the use of stimulants alone. Among them, 1%GLU combined with complex bacterial flora had the best passivation effect on Cd, reducing the available Cd by 25%, followed by 0.5% GLU combined with complex bacterial flora and 0.5%HA combined with complex bacterial flora, which reduced the available Cd by 21.92% and 19.17%, respectively. The synergistic remediation method using stimulants and microorganisms can reduce the harm caused to the environment by conventional remediation methods and improve the effectiveness of soil remediation. It has broad application prospects in the field of bauxite-contaminated soil remediation.
研究领域:
环境科学
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微生物学
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Xian-Ling Yang,Jun Li,Wan-Xia Wu,Yan-Hong Liu,Na Wang,Xiao-Qi Yu
In the field of drug delivery, the controlled release of drugs is continuously one of the highly prioritized research domains. Stimuli-responsive polymers are being investigated as drug delivery vehicles that modulate pharmaceutical effect via tumor specific mechanisms. In this work, a biocompatible graft copolymer (denoted as PSNC- g -mPEG/TPE) was constructed, which comprised a triple-responsive polycarbonate backbone coupled with fluorescent TPE and hydrophilic methoxypoly(ethylene glycol) (mPEG) segments. This multifunctional amphiphilic copolymer was able to self-assemble in aqueous solutions and acted as a drug delivery vehicle that releases cargo in response to multiple biological stimuli (ROS, pH and enzymes). And the results of confocal laser scanning microscopy (CLSM) suggested that these micelles could be rapidly internalized by cells and achieve more effective drug release in cancer cells. Furthermore, the cytotoxicity assays proved the safety of this material. It is anticipated that this strategy has enormous potential in constructing novel anticancer therapeutics.
研究领域:
药学
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生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
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2017
·
IF 4.811
Mengmeng Huo,Wenyan Li,Arka Sen Chaudhuri,Yuchao Fan,Xiu Han,Chen Yang,Zhenghong Wu,Xiaole Qi
In this study, we developed bio-stimuli-responsive multi-scale hyaluronic acid (HA) nanoparticles encapsulated with polyamidoamine (PAMAM) dendrimers as the subunits. These HA/PAMAM nanoparticles of large scale (197.10 ± 3.00 nm) were stable during systematic circulation then enriched at the tumor sites; however, they were prone to be degraded by the high expressed hyaluronidase (HAase) to release inner PAMAM dendrimers and regained a small scale (5.77 ± 0.25 nm) with positive charge. After employing tumor spheroids penetration assay on A549 3D tumor spheroids for 8 h, the fluorescein isothiocyanate (FITC) labeled multi-scale HA/PAMAM-FITC nanoparticles could penetrate deeply into these tumor spheroids with the degradation of HAase. Moreover, small animal imaging technology in male nude mice bearing H22 tumor showed HA/PAMAM-FITC nanoparticles possess higher prolonged systematic circulation compared with both PAMAM-FITC nanoparticles and free FITC . In addition, after intravenous administration in mice bearing H22 tumors, methotrexate (MTX) loaded multi-scale HA/PAMAM-MTX nanoparticles exhibited a 2.68-fold greater antitumor activity.
研究领域:
药剂学
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肿瘤学
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纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Mengying Xu,Jingyan Zheng,Pier-Luc Tremblay,Xiangyang Jiang,Chun He,Yujie Wang,Muhammad Babur Joya,Tian Zhang
Amid the pursuit of renewable energy, photocatalytic H 2 evolution (PHE) and biosynthetic processes gained attention. Bulk g-C 3 N 4 (CN) was calcined under the atmosphere and various gases (air, CO 2 , N 2 , and Ar) to achieve ultra-thin nanosheets. Using greenhouse gas CO 2 for the calcination (CN–CO 2 ) results in a greater PHE rate than in the atmosphere and air, similar to inert gases N 2 and Ar. Under visible light, CN–CO 2 produced H 2 2.6 times faster than CN. Therefore, CN–CO 2 was chosen to promote polyhydroxybutyrate (PHB) production by Cupriavidus necator H16 in hybrid photosynthetic system. The heterotrophic PHB production was increased to 9.14 g/L, which was 1.9 times higher than without the photocatalyst (4.93 g/L), and 1.1 times more than with CN (8.11 g/L). The autotrophic PHB production was also enhanced by adding CN–CO 2 . In summary, the dual benefits of PHE and biological stimulation were achieved by calcining g-C 3 N 4 in CO 2 .
研究领域:
能源生物学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2021
·
IF 8.071
Manzoor Ahmad,Pandeng Wang,Jia-Ling Li,Renfei Wang,Li Duan,Xiaoqing Luo,Muhammad Irfan,Ziqi Peng,Lingzi Yin,Wen-Jun Li
Bio-stimulation of the indigenous microbial community is considered as an effective strategy for the bioremediation of polluted environments. This examination explored the near effects of various bio-stimulants on pyrene degradation, prokaryotic community compositions, and functions using 16S rRNA amplicon sequencing and qPCR. At first, the results displayed significant differences (p < 0.05) between the prokaryotic community structures of the control group, PYR (contains pyrene only), and bio-stimulants amended groups. Among the bio-stimulants, biochar, oxalic acid , salicylate , NPK, and ammonium sulfate augmented the pyrene degradation potential of microbial communities. Moreover, the higher abundance of genera, such as Flavobacterium, Hydrogenophaga, Mycobacterium, Rhodococcus, Flavihumibacter, Pseudomonas , Novosphingobium, etc., across the treatments indicated that these genera play a vital role in pyrene metabolism. Based on the higher abundance of GP-RHD and nidA genes, we speculated that Gram-positive prokaryotic communities are more competent in pyrene dissipation than Gram-negative. Furthermore, the marked abundance of nifH, and pqqC genes in the NPK and SA treatments, respectively, suggested that different bio-stimulants might enrich certain bacterial assemblages. Besides, the significant distinctions (p < 0.05) between the bacterial consortia of HA (humic acid) and SA (sodium acetate) groups from NPK, OX (oxalic acid), UR (urea), NH4, and SC (salicylate) groups also suggested that different bio-stimulants might induce distinct ecological impacts influencing the succession of prokaryotic communities in distinct directions. This work provides new insight into the bacterial degradation of pyrene using the bio-stimulation technique. It suggests that it is equally important to investigate the community structure and functions along with studying their impacts on degradation when devising a bio-stimulation technology .
研究领域:
环境科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chengyi He,Tianyue Wu,Jing Li,Xingyu Zhang,Zirui Zheng,Yuxia Gao,Chenhui Zhang,Tingjun Zhong,Yunfei Zhang,Fengpei Du
Pesticides are important agricultural production materials to ensure global food security, but the low utilization rate during pesticide application has caused a large amount of waste and environmental pollution. The use of pesticide carriers to deliver pesticides can help to prevent rapid release, assist in targeted release, and improve pesticide utilization. However, after completing pesticide delivery, less part of pesticide carriers has more functions and may remain in the environment, leading to material waste and environmental burden. Here, we propose that the environment-friendly carrier materials for pesticide delivery can synergistically enhance control efficacy with pesticides. Based on the bio-stimulant polyglutamic acid, amphiphilic polymers (mPEG-b-PLG) were constructed, and they assembled into nano micelle. After encapsulating prothioconazole (PTC) into the nano micelle through hydrogen bonding, electrostatic interactions and hydrophobic interactions through co-assembly, mPEG-b-PLG-PTC nanospheres with a diameter of approximately 120 nm were prepared. The nanospheres exhibit pH responsiveness for targeted release of pesticides, as well as excellent retention capacity, droplet bounce inhibition ability, and deposition capacity. At the same time, compared with commercial formulations, it has long-term antifungal properties and lower EC 50 , while its acute toxicity to human cells is lower, which can reduce cell apoptosis by about 63 %. It is also gratifying that the main root length, plant height, and fresh weight of wheat seedlings treated with mPEG-b-PLG have significantly improved, effectively applying carrier materials for synergistic effects. In summary, this work proposes a promising strategy to synergize pesticide carrier materials as active ingredients, providing new ideas for the integration of pesticide and fertilizer, improving pesticide utilization efficiency, and reducing environmental pollution.
研究领域:
农业科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Meng Yuan,Guotao Chen,Yibo Xiao,Yujiao Qu,Yuan Ren
The biodegradation of Trichloroethylene (TCE) is limited by low microbial metabolic capacity but can be enhanced through biostimulation strategies. This study explored the physiological effects and potential molecular mechanisms of the yeast Yarrowia lipolytica extracellular metabolites (YEMs) on the degradation of TCE by Acinetobacter LT1. Results indicated that YEMs stimulated the efficiency of strain LT1 by 50.28%. At the physiological level, YEMs exhibited protective effects on cell morphology, reduced oxidative stress , lessened membrane damage, and enhanced energy production and conversion. Analysis of omics results revealed that the regulation of various metabolic pathways by YEMs improved the degradation of TCE. Furthermore, RT-qPCR showed that the genes encoding YhhW protein in TCE stress and YEMs stimulation groups were 1.72 and 3.22 times the control group, respectively. Molecular docking results showed that the conformation of YhhW after binding to TCE changed into a more active form, which enhanced enzyme activity . Therefore, it is speculated that YhhW is the primary degradative enzyme involved in the process of YEMs stimulating strain LT1 to degrade TCE. These results reveal how YEMs induce strain LT1 to enhance TCE degradation.
研究领域:
环境微生物学
·
分子生物学
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生物化学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Huaorng Yu,Chenyu Du,Fangshu Qu,Junguo He,Hongwei Rong
Quorum quenching (QQ), which disrupts bacterial communication and biofilm formation, could alleviate biofouling in MBR. QQ bio-stimulus possessing similar conserved moiety as the signal molecule could promote indigenous QQ bacteria, and thus successfully alleviate biofouling in MBR. However, efficient biostimulant has been barely explored for QQ enhancement in activated sludge system. This study extensively enumerated the potential QQ bio-stimuli, and examined their efficacy on QQ promotion for activated sludge. Moreover, the effect of the QQ consortia on fouling mitigation was also investigated. The results indicated that gamma-caprolactone (GCL), d -xylonic acid-1,4-lactone (XAL), gamma-heptalactone (GHL), urea, and acetamide proved effective in promoting AHLs inactivating activity of activated sludge. GCL, XAL, and GHL intensified the lactonase activity, while urea and acetamide augmented acylase activity. While coupled with beads entrapment, GCL consortia beads, XAL consortia beads, and urea consortia beads effectively disrupted quorum sensing (QS) and controlled membrane fouling in MBR. This work found out several optional bio-stimuli valid for tuning QQ in activated sludge system, and provided easily available and economical alternatives for QQ biostimulation, meanwhile the proposed QQ-MBR approach through QQ biostimulation and consortia entrapment also proved effective and practical.
研究领域:
环境工程
·
微生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 12
·1667-1672
·
IF 0
Yan-Zhi Tian,Yan-Li Li,Zhi-Fei Wang,Yong Jiang
In this paper, a DNA–PEI microcapsule with novel nuclease-responsive controlled release properties was demonstrated. This microcapsule was constructed by the self-assembly of native DNA and PEI, and can work as a dual carrier for both DNA in the capsule shell and drugs inside the capsule. The controlled release behavior of the model drug BSA–FITC was studied using fluorescence microscopy and UV spectroscopy, and the results show that the synergetic controlled release can be triggered very well by a bio-stimulus, DNA nuclease recognition capsule decomposition, as well as the pH value and salt concentration. The therapeutic effects of the drug are enhanced due to the bio-stimuli responsive properties and the synergetic release of DNA and the drug together.
研究领域:
生物医学工程
·
药物递送系统
·
分子生物学
·
材料科学
·
转化医学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）