GREEN CHEMISTRY
·
2023
·
IF 9.8
Yuhua Chen,Chengqi Feng,Chenkai Jin,Yuxin Zhu,Juncheng Huang,Haining Na,Jin Zhu
Pyruvaldehyde as a carbon source is synthesized together with boric acid to produce a carbon-based solid catalyst with in situ bifunctional groups of adsorptive boron hydroxyls and carboxyls in a single-step hydrothermal carbonization process, which is mainly utilized to induce the hydrolysis of cellulose to sugar in pure water. The obtained catalyst exhibits a strong adsorption capacity of 532 mg g−1 with cotton cellulose and possesses good water dispersibility. It can effectively break the aggregated structure of cellulose through the strong interfacial adsorption interaction to induce the hydrolysis of cellulose to sugar with high efficiency in the pure aqueous system. The cellulose conversion and the glucose yield reach 97.3% and 40.0%, respectively. Additionally, the catalyst demonstrates excellent hydrothermal stability and reusability. As a result, a high-yield, acid-free, green, and environmentally friendly hydrolytic process of cellulose to sugar in pure water is successfully established.
研究领域:
化学工程
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可再生资源利用
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DOI
高影响因子
Environmental Science-Nano
·
2025
·
IF 5.1
Bingqian Jing,Yuanyuan Li,Xiaofeng Liu,Zihang Zeng,Zan Long,Bingni Jia,Bo Feng,Peng Zhang,Taiping Qing
The widespread use of triazine pesticides in agricultural practices raises concerns regarding their potential harm to both humans and the environment, given their known carcinogenic and neurotoxic effects. Triazine pesticides exhibit various toxic effects on organisms, posing a significant challenge in accurately distinguishing them due to their analogous structures. Herein, we functionalized platinum nanoparticles (Pt NPs) and constructed a three-channel sensing array by modulating their oxidase-like activities through various ligands on the surface of Pt NPs. Triazine pesticides can inhibit the activity of functionalized Pt NPs, allowing the substrate TMB to show different degrees of color development reaction, which provides a solid basis for the construction of sensing arrays by platinum nanozymes. The proposed platinum nanozyme sensing array showed good performance for the identification of five kinds of triazine pesticides (atrazine, simazine, metribuzin, metamitron, and terbutryn) across a wide range of concentrations (0.5-100 µg/mL) through statistical classification using advanced algorithms like linear discriminant analysis (LDA) and hierarchical cluster analysis (HCA). Importantly, the sensing array exhibited good anti-interference ability and achieved accurate discrimination of structurally similar triazine pesticides in real water samples. This study provided a simple and effective method for the identification of triazine pesticides, with potential for discriminating other related pollutants such as antibiotics and biotoxins for environmental monitoring and food safety.
研究领域:
环境科学
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分析化学
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生物医学工程
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DOI
高影响因子
Water
·
2024
·Vol. 16
·期 22
·3233
·
IF 3
Chun-Yan Lin,Wenliang Wu,Wenya Shao
Phosphorus removal is critical for effective water treatment and the prevention of eutrophication. This study focuses on the modification of attapulgite, an economical clay material, with zirconium (Zr@ATP) to enhance its phosphorus adsorption capacity. Zr@ATP was comprehensively characterized, and its phosphorus-removal mechanisms were investigated. Additionally, its performance in water treatment was evaluated using a lake water-sediment system. Zr@ATP exhibited a high surface area of 329.29 m2/g. The static adsorption experiments revealed that Zr@ATP achieved a phosphorus-removal efficiency of 95.8% at an adsorbent dosage of 5 g/L. Kinetic studies indicated that the adsorption followed a pseudo-second-order model, with the primary mechanism being chemisorption via ion exchange. Application of Zr@ATP in a lake water-sediment system resulted in an 83.6% reduction in total phosphorus. The chlorophyll concentration significantly decreased from 32.33 μg/L to 8.56 μg/L, and the algal density decreased by 84.6%, effectively inhibiting algal growth. These results suggest that Zr@ATP is a promising adsorbent for sustainable phosphorus removal and eutrophication control in aquatic environments.
研究领域:
环境科学
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水处理技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuying Zhang,Na Li,Lianmei Chen,Xueru Sheng,Bing Wang,Jian Zhang,Qingwei Ping,Yan Shi
In this paper, bamboo biochar was prepared and used for laccase immobilization. Biochar was prepared under different conditions (pyrolysis temperature, heating rate and dwell time) to understand biochar characteristics impacts on enzyme activity. The results showed that the preparation conditions had an important effect on the content of carboxyl groups on biochar. And the specific surface area is not the key factor affecting laccase immobilization in this study, which is a little different than before. The highest immobilized laccase activity (1404.17 U/g) was obtained when the biochar was heated to 300 °C at the rate of 15 °C/min and stayed for 1.5 h, and the carboxy group concentration was 0.490 mmol/g. Compared with free laccase (FL), the immobilized laccase on bamboo biochar (LBC) showed higher thermo-tolerant performance, more excellent acid-proof ability and reusability. Without any mediators, LBC displayed high degradation efficiency (74.72 %, 85.88 % and 94.53 %, respectively) for bisphenol A (BPA), malachite green (MG) and methyl orange (MO) in water. Our research demonstrates that the content of carboxyl group in biochar plays a decisive role in the immobilization of laccase and LBC has excellent performance in the effective removal of toxicant in water, which makes it a promising candidate for environmental recovery.
研究领域:
环境科学
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生物技术
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Zhixiang Xu,Dongshan Chen,Xingyu Duan,Yuning Chen,Caiqing Li,Siyuan Li,Yitao Ma,Bin Huang,Xuejun Pan
Dissolved inorganic and organic phosphorus is a major factor in triggering the eutrophication of water bodies. At present, a novel Zr 4+ cross-linked sodium alginate encapsulated in Ce-UIO-66 microspheres (Zr-SA/Ce-UIO-66) was prepared and systematically characterized. Its ability for capture of phosphate and glyphosate in their single and binary systems has been investigated comprehensively. Results showed that Zr-SA/Ce-UIO-66 exhibits excellent phosphate adsorption, achieving 92 % removal and a maximum adsorption capacity of 125 mg P/g at 313 K. Diversified mechanisms, including electrostatic attraction, ligand exchange and hydrogen bonding, have cooperatively participated in phosphate removal. Interestingly, in phosphate and glyphosate mixed solutions, the presence of phosphate significantly enhanced the removal of glyphosate for the formation of complexes between phosphate ions and the adsorbent. And that was similar to the presence of glyphosate in phosphate adsorption. Simulated wastewater experiments demonstrated the adsorbent’s practical application in water contaminated with both organic phosphorus and glyphosate composites and its potential for recycling and reuse.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2025
·
IF 2.5
Hui Zhang,Ziqi Wang,Yahui Ji,Junfeng Li,Feifei Chen,Fangxin Du,Gen Liu
The detection of organic pollutants in water was deemed critical for safeguarding aquatic ecosystems, maintaining human health, and upholding water quality standards. In this study, a novel electrochemiluminescence (ECL) sensor was proposed for the sensitive detection of hydroquinone (HQ) in lake water, utilizing a glassy carbon electrode (GCE) modified with silver/luminol-functionalized carbon microspheres (GCE/CM@Ag/Lu). Due to the consumption of H 2 O 2 by HQ, the ECL signal was attenuated, enabling the quantitative detection of HQ. Under optimized conditions, the linear range for HQ ranged from 1.0 × 10 −4 –1.0 × 10 −10 mol L −1 , with a limit of detection (LOD) of 3.3 × 10 −11 mol L −1 (S/N = 3). The proposed ECL sensor shows promising potential to open new avenues for water quality assessment.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-11
·
IF 3.998
Song Jinlong,Han Gang,Wang Yani,Jiang Xu,Zhao Dongxue,Li Miaomiao,Yang Zhen,Ma Qingyun,Parales Rebecca E.,Ruan Zhiyong,Mu Yingchun
Malachite green is a common environmental pollutant that poses a great threat to non-target organisms, including humans. This study reports the characterization of a bacterial strain, Pseudomonas veronii JW3-6, which was isolated from a malachite green enrichment culture. This strain degraded malachite green efficiently in a wide range of temperature and pH levels. Under optimal degradation conditions (32.4 °C, pH 7.1, and inoculum amount of 2.5 × 10 7 cfu/mL), P. veronii JW3-6 could degrade 93.5% of 50 mg/L malachite green within seven days. Five intermediate products from the degradation of malachite green were identified: leucomalachite green, 4-(dimethylamino) benzophenone, 4-dimethylaminophenol, benzaldehyde, and hydroquinone. We propose a possible degradation pathway based on these findings. The present study is the first to report the degradation of malachite green by P. veronii and the identification of hydroquinone as a metabolite in the degradation pathway.
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
MOLECULES
·
2019
·Vol. 24
·期 9
·1670
·
IF 3.06
Sandip Mondal,Jialing Jiang,Yin Li,Gangfeng Ouyang
In this study, the detection and quantification of multiple classes of antibiotics in water matrices are proposed using a lab-made solid phase microextraction (SPME) fiber coupled with high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS). The lab-made fiber was prepared using a graphene oxide (G), carbon nanotubes (C), and tin dioxide (T) composite, namely GCT, with polyacrylonitrile (PAN) as supporting material. The detected antibiotics were enrofloxacin, sulfathiazole, erythromycin, and trimethoprim. The custom-made fiber was found to be superior compared with a commercial C18 fiber. The excellent reproducibility and lower intra-fiber relative standard deviations (RSDs 1.8% to 6.8%) and inter-fiber RSDs (4.5% to 8.8%) made it an ideal candidate for the detection of traces of antibiotics in real environmental samples. The proposed validated method provides a satisfactory limit of detection and good linear ranges with higher (>0.99) coefficient of determination in the aqueous system. Application of the method was made in different real water systems such as river, pond and tap water using the standard spiking method. Excellent sensitivity, reproducibility, lower amount of sample detection and higher recovery was found in a real water sample. Therefore, the extraction method was successfully applied to the detection and quantification of multiple classes of antibiotics in different aqueous systems with satisfactory results.Keywords:antibiotics;composite materials;solid-phase microextraction;LC-MS/MS;water matrices
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Qian Liu,Haowen Wu,Cong Huang,Hui Lin,Wei Li,XiuFang Zhao,Zhiling Li,Sihao Lv
Black-odour water with organic compounds and heavy metals caused by domestic and industrial activities has aroused people's attention in recent years, yet little is known about the ecological effects on aquatic organisms, especially microorganisms in sediments. To explore the response of microbial communities to environmental factors, the community and metabolites of nine river sediments with different pollution in Dongguan city, China were investigated using 16S rRNA gene sequencing and liquid chromatography tandem-mass. The results revealed that the composition and structure of sedimentary microbial communities significantly changed in rivers with varying pollution levels. Cyanobacteria were the most abundant organisms in the sediment of black-odorous rivers, while the relative abundance of Thaumarchaeota was gradually increased with the river quality gets better. The relative abundance of organic acids (including amino acids), alcohols, esters, and ketones associated with microbial metabolism in sediments of polluted rivers was increased. The 16S rRNA gene sequencing-based molecular ecological network analysis indicated that the interactions amongst bacteria were enhanced in severely contaminated communities. Sphingomonadaceae and Cyanobacteria have important roles in bacterial community structures of polluted rivers and those with ongoing treatment. The correlation analysis showed significant metal resistance and/or tolerance of the following bacteria species Thalassiosira weissflogii , Aminicenantes bacterium clone OPB95 , ‘Candidatus Halomonas phosphatis’ , and archaeal species Methanolinea and unidentified Thermoplasmata . These results indicated that sedimentary microbial communities may shift in composition and structure, as well as their interaction network, to adapt and resist environmental contamination and promote restoration.
研究领域:
环境科学
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微生物学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Tao Yang,Yan Wang,Die Li,Jing Chen,Qiang Zhang
Biocatalytic membranes with convenient assembly and favorable activity regeneration are highly desired for practical water treatment. Herein, glycosylated membrane has been developed as a regenerable matrix for immobilizing laccase via specific carbohydrate-protein recognition, using Concanavalin A as the bridge. The laccase-immobilized biocatalytic membranes have been successfully used to treat aquatic micropollutants. Plenty of saccharide units are introduced to the surface of substrate, contributing to enhance hydrophilicity . The removal ratio of bisphenol A (BPA) is significantly improved thanks to the pore narrowing effect and laccase-induced degradation process. Moreover, the biocatalytic membrane could be rapidly regenerated by chemical rinsing and the lectins are also able to be reloaded. As a result, thus-prepared biocatalytic membrane can be repeatedly used with good BPA removal for 8 cycles. This work not only presents a simple and reliable method to make glycosylated membrane, but also provides a guidance of biocatalytic membranes for water treatment.
研究领域:
环境科学
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生物技术
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水处理工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Liying Yan,Qiuyu Rong,Hao Zhang,Kevin C. Jones,Yanying Li,Jun Luo
The potential environmental risks of glucocorticoids (GCs) have attracted attention in the past few decades. In this study, a novel diffusive gradients in thin-films (DGT) device and analytical technique based on the second generation of polar enhanced phase (PEP-2), PEP-2-DGT, were developed for sampling and quantifying natural and synthetic GCs in aquatic systems. The capacity of PEP-2 gels for accumulating all target compounds was >600 μg per disc, sufficient for long-term passive sampling of selected GCs, even in wastewaters. Systematic tests were carried out to verify the application of DGT in natural waters and wastewaters. The performance of PEP-2-DGT devices was independent (CDGT/Csoln was in the acceptable range of 0.9–1.1) of a wide range of environmental conditions: ionic strength (0.001–0.5 mol L–1), dissolved organic matter (0–20 mg L–1), and pH (3.06–9.02). It was tested for various diffusive layer thicknesses (0.565–2.065 mm) and different deployment times (10–168 h). Diffusion coefficients (D) of selected GCs through an agarose-based diffusive gel were determined for the first time (3.80–4.85 × 10–6 cm–2 s –1 at 25 °C). Linear correlations between D and log Kow were established for three groups of target GCs (R2 = 0.96–0.99). This could enable prediction of D values for other GCs with similar structures in the future, which will help for rapid screening and emergency monitoring. Concentrations and distribution patterns of analytes obtained by PEP-2-DGT devices in five rivers after 7- and 14-day deployments were in accordance with those measured from grab samples, with total GC concentrations ranging from 7 to 27 ng L–1 at all sampling sites, confirming the reliability and robustness of the DGT devices for monitoring GCs in natural waters. The development of the new DGT technique will help improve understanding of the behavior and fate of these compounds in the aquatic environments.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Qinghai Wang,Lei Peng,Peixin Wang,Zixin Zhou,Cui Li,Chuansheng Chen,Yu Wang
The coexistence of herbicide atrazine (ATZ) and the nanomaterial graphene oxide (GO) in natural water bodies will be an inevitable scenario due to their widespread application and consequent release into aquatic ecosystems . But the dissipation of ATZ with GO and the response of the microbial community to their combination are still not clear. Here, we investigated the dissipation dynamics and transformation of ATZ with and without GO in river water after 21-d incubation. In the presence of GO, ATZ residue significantly decreased by 11%−43%; the transformation of ATZ markedly increased by 11%−17% when ATZ concentrations were not above 1.0 mg∙L –1 . The direct adsorption of ATZ on GO, mainly via π–π interactions, proton transfer and hydrogen bonding, contributed 54%−68% of the total increased ATZ dissipation by GO. ATZ and ATZ+GO exerted effects of similar magnitude on microbial OTU numbers with an increase of bacterial diversity. The coexisting GO increased the relative abundance of ATZ-degradation bacteria and Chitinophagales , thus improving ATZ transformation. This work indicated that the coexistence of GO at environmentally relevant concentrations can effectively reduce ATZ residues and promote the transformation of ATZ to degradation products in river water; nevertheless, the potential risk of GO acting as an ATZ carrier should be given more prominence.
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
危险品化学品经营许可证（带存储）