CHEMOSPHERE
·
2023
·
IF 8.8
Hongying Gao,Chuan Liu,Heng Wang,Heqing Shen
Aqueous environments are generally thought to be a source of pooling and re-distribution for both micro-plastics (MPs) and nano-plastics (NPs); however, significantly less data on NPs than MPs have been reported. The occurrence of salts, proteins, and other organic matter may promote or inhibit the aggregation of NPs to form agglomeration particles, making their detection more difficult. In this study, 80 and 500 nm polystyrene nano-plastics ( P S-NPs) modified by four different functional groups ( P S-Bare, P S-COOH, P S-NH 2 , and P S–CHO–500 nm) were selected to mimic the flocculation and/or sedimentation of NPs in salts (NaCl, CaCl 2 , and Na 2 SO 4 ) and protein solutions. The results showed that the 80 nm P S-NPs are only colloidal in pure water. All four strong electrolyte solutions that were tested significantly promoted the aggregation of P S-NPs, including those that were protein-coated. In addition, 500 nm P S-CHO did not flocculate but gradually settled into sedimentation. Therefore, Raman spectrometry can be used to analyze assembled P S-NPs, but is not suitable for analyzing normal P S-NPs. By combining fractal morphology, this study provides insight into the comprehensive analysis of P S-NPs in water solutions, including the digestion of biological samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2024
·
IF 5.8
Yiping Feng,Jingyi Wu,Wenhao Lao,Weibiao Ye,Danni Guo,Zhu Wang,Xiaowei Wu,Racliffe Weng Seng Lai
Micro- and nanoplastics are emerging pollutants that have attracted significant attention due to their potential to concentrate and transport coexisting organic pollutants in aquatic environments. Fluorinated liquid-crystal monomers (FLCMs) have also emerged as contaminants of concern, given their frequent occurrence, potential toxic effects, and propensity to co-occur with plastics in the environment. However, the influence of plastics on the environmental fate of FLCMs remains unclear yet. To address this knowledge gap, we investigated the accumulation of a key FLCM, 4-cyano-3-fluorophenyl 4-ethylbenzoate (CEB-F), on three common plastics, and examined the effects of nanoplastics on the phototransformation of CEB-F and its acute toxicity to Daphnia magna (D. magna). Our findings revealed that the adsorption capacity of CEB-F on different plastic materials followed the order: polystyrene (PS) < mixed cellulose ester (MCE) < polyamide (PA). The adsorption processes of CEB-F on the three plastics aligned more closely with the pseudo-first-order kinetic model and the Langmuir isotherm model, suggesting that the adsorption is primarily governed by physical diffusion. Theoretical calculations indicated that the adsorption of CEB-F on PS plastics is mainly driven by hydrophobic interactions. Additionally, PS nanoplastics (PSNPs) significantly enhanced the UV degradation of CEB-F, although the types of degradation intermediates did not change substantially, suggesting a limited impact on the degradation process and mechanism. Acute toxicity tests showed that PSNPs increased the toxicity of CEB-F to D. magna at lower concentrations, while the toxicity was reduced at higher concentrations. The obtained findings are of great significance to unraveling the plastic-mediated environmental fate and aquatic toxicity of FLCMs in natural waters.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yanjun Zhang,Yu Yang,Satoshi Takizawa,Keisuke Kuroda,Zhiqian Jia,Peijuan Liu,Huangzhao Wei,Nigel J.D. Graham
The simultaneously efficient removal of radionuclides and heavy metals is an important and challenging topic for aquatic environmental protection. In this work, molybdenum disulfide (MoS 2 ) with heavy metal ion adsorption capacity and positively charged polyethyleneimine (PEI) were used to fabricate a novel layer-by-layer (LbL) self-assembly composite membrane by a simple alternating immersion method. The unique structure with positive charge ensures high removal for toxic metals (R Cs(I) = 99.83 %, R Sr(II) = 100 %, R Hg(II) = 99.2 %, R Pb(II) = 98.13 %, R As(III) = 98.5 %). The inherent low resistance channels in MoS 2 provided the optimized composite membrane an elevated water flux. Long-term experiments and membrane regeneration also demonstrated that the membrane possesses exceptional stability and reusability in removing low levels of radionuclides Cs(I) and Sr(II) from water. This study confirms the feasibility of the MoS 2 -PEI composite membrane for the treatment of contaminated waters containing radionuclides and heavy metals.
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Kai Han,Yanjun Liu,Jianan Hu,Junjie Jia,Shujuan Sun
With the development of medical drugs, the widely used tetracycline has brought many adverse effects on the ecosystem and human health. Tetracycline pollution of water environment is becoming more and more serious, and has become an emerging environmental problem. As single celled organisms, microalgae are not only model organisms for risk assessment of aquatic ecosystems , but also can efficiently purify sewage. Microalgae-mediated pollutant remediation has attracted more and more attention from researchers. In this paper, Chlamydomonas reinhardtii ( C. reinhardtii ) was used to remove tetracycline in aqueous solution, and the removal efficiency and mechanism of microalgae on tetracycline were studied. The results showed that the removal rates of tetracycline by active and inactivated microalgae at a density of 5 × 10 6 cells·mL −1 were 81.9% and 89.8%, respectively. C. reinhardtii removed tetracycline through biosorption and nonmetabolic processes. Microalgal cell supernatant and hydroxyl radicals could significantly promote the removal of tetracycline. The positively charged tetracycline was electrostatically adsorbed on the microalgae surface and extracellular polymeric substances. Microalgae biomass can promote the production of ROS and enhance the ability of microalgae to remove tetracycline.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiayan Wu,Quanyun Ye,Meiqing Chen,Leiye Sun,Sheng Liu,Linqing Liu,Pingxiao Wu,Nengwu Zhu
The heteroaggregation of nanoplastics with minerals has been widely investigated. However, few studies have focused on the interaction between similar negatively charged clay minerals and nanoplastics, especially how their interactions affect the migration of heavy metals. This study investigated heteroaggregation of kaolinite (a model of natural mineral) with polystyrene nanoplastics (PSNPs) and the effect of heteroaggregates on lead (Pb 2+ ) sorption . Dynamic light scattering (DLS) measurement highlighted that PSNPs owned higher colloidal stability than kaolinite in aquatic environments. Due to the surface charge heterogeneity of kaolinite, the heteroaggregation behavior between kaolinite and PSNPs was highly pH-dependent. At pH 3.0 and 6.0, kaolinite particles with positively charged edge surfaces favored the association of PSNPs. PSNPs were found to be primarily attached on the kaolinite edge (010) surface, followed by Al-terminated (001) and Si-terminated (00 1 ¯ ) surfaces based on density functional theory (DFT) calculations. At pH 10.0, they had negligible interaction due to the strong electrostatic repulsion. Interestingly, kaolinite carried more negative charges after heteroaggregation with PSNPs, resulting in slower edge-to-face homoaggregation and higher dispersibility, and thus increasing the sorption capacity for Pb 2+ . This investigation provided a new understanding of nanoplastics interactions with negatively charged minerals and highlighted the vital role of nanoplastics in mineral stability and contaminant migration.
✓ 已验证
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Runchao Dong,Hulin Wang,Jia Zhang,Hongxin Yin,Genqiang Liu,Bartosz Orwat,Beata Luszczynska,Weijun Li,Dongdong Zhang,Huan He,Zhentao Du,Shanliang Chen,Weiyou Yang
Manipulating the interfacial and surface carrier dynamics within nanostructured semiconductors is pivotal for advancing the electrical and optical performances of photoelectrochemical (PEC) photodetectors (PDs), particularly for durable underwater optical communication systems. Herein, a highly responsive and robust self-powered PEC UV PDs based on SiC/Au heterojunction nanoarrays is explored, by leveraging the synergistic effect from localized surface plasmon resonance (LSPR) of Au nanoparticles (NPs), heterojunction interfacial engineering, integrated self-supporting photoelectrode architecture, 1D nanoarray benefits, and inherent chemical stability of SiC. SiC nanowire (NW) arrays are fabricated via anodic oxidation and subsequently decorated with tailored densities of Au NPs using controlled sputtering. The as-assembled SiC-based PEC PDs demonstrate exceptional UV (375 nm) photodetection behaviors with rapid response ( τ r / τ d , 86.5/170.95 ms), high responsivity ( R λ , 1244.95 mA W −1 ), excellent detectivity ( D * , 6.35 × 10 11 Jones), and remarkable external quantum efficiency ( EQE , 412.45%). Moreover, they exhibit broad pH tolerance and excellent long-term stability against full aquatic environments. This work provides a strategic approach for designing high-performance self-powered PEC PDs for reliable underwater optical communication, such as liquid environmental monitoring, ocean exploration, and biomedical detection.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·
IF 11.3
Xihe Yang,Jiaqi Luo,Xin Zhang,Wenxiao Pan,Qiao Xue,Hongru Feng,Xian Liu,Yuanjiang Pan,Jianjie Fu,Aiqian Zhang
Microplastics (MPs), prevalent in water bodies, soil, and the atmosphere, pose significant risks to environmental and ecological health. By adsorbing hazardous compounds, such as organic pollutants, MPs can alter the transport and fate of these pollutants. To address this, we developed a multimodal Siamese neural network named microplastic-pollutant adsorption prediction (MPAP), trained on 1101 adsorption records covering 403 compounds and six MP types. Unlike previous models that rely on single-feature representations, MPAP leverages a multimodal architecture that integrates molecular fingerprints and graph embeddings to capture chemical structures, along with microplastic morphological features such as the MP type and particle size, as well as water chemistry parameters, enabling a more comprehensive characterization of sorption behavior. The model outperforms baseline models with R2 = 0.869 on the validation set and 0.863 on the test set. Experimental validation using batch adsorption experiments with six previously untested pollutants, quantified via liquid chromatography–mass spectrometry or microwave plasma torch ionization–mass spectrometry in different environments, confirmed a strong predictive performance. To support broad application, we provide an open-access web platform (http://mpap.envwind.site:8004/) for rapid, high-throughput prediction across diverse MP–pollutant–water environment scenarios.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2023
·
IF 8.7
Ziwei Guo,Huan He,Kunqian Liu,Shicheng Yang,Zihui Li,Chaochao Lai,Zhicheng Liao,Xiaomin Ren,Bin Huang,Xuejun Pan
Insights into COVID-19 antivirals’ environmental fate and ecological risk are urgently required due to their increasing concentrations in aquatic environments, which have rarely been studied. Herein, we first investigated the photochemical transformation and the resulting alterations in toxicity of arbidol, an antiviral drug with relatively higher toxicity. The photolysis of arbidol was rapid with a rate constant of 0.106 min −1 due to its superior ultraviolet light absorption , in which the direct photolysis was predominated with a contribution of 91.5%. Despite its substantial photolysis, only 14.45% of arbidol was mineralized after 100 min, implying that arbidol and its products might have a long-term impact on aquatic environment. It was inferred that arbidol was photolyzed mainly via the loss of thiophenol, bromine, and alkylamine, based on twelve photolytic products identified. Notably, the experimental results demonstrated that the photolysis process increased the acute toxicity of arbidol, and the toxicity prediction indicated that the ecotoxicity of two photolytic products was very high with LC 50 values below 0.1 mg/L. Due to the co-effect of multiple constituents, the photolytic rate observed in wastewater treatment plant effluent and in river water was comparable to that in ultra-pure water, while it was slightly enhanced in lake water. The presence of dissolved organic matter suppressed arbidol photolysis, while NO 3 − exhibited a promotion effect. These results would be of great significance to assess the fate and risk of COVID-19 antivirals in natural aquatic environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 16
·2300331
·
IF 3.6
Jing Xiao,Liangying Jia,Kaiqiang Zhang,Xu Wang
Materials are inevitable to suffer from mechanical damage such as scratches or cuts when they are exposed to the marine environment. Herein, a hierarchical composite material is fabricated, which demonstrates the self-reporting and self-healing behaviors in aquatic environments including deionized water, seawater, acidic, and basic aqueous solutions. The composite material is constructed of a five-layer structure and shows excellent responsiveness to water molecules. After the material is damaged underwater, the chemiluminescence reaction comes into being quickly and the luminescence signal can last for over 3 h, allowing for timely and rapid reporting of damage. Furthermore, materials demonstrate high stretchability and self-healing behavior, making them possible to serve as soft products used in underwater environments.
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2024
·
IF 6.2
Wenjun Xiong,Wei Wei,Man He,Bin Hu,Jun Men,Jiawei Tu,Wei Miao
Biomethylation is an effective means of arsenic detoxification by organisms living in aquatic environments. Ciliated protozoa (including Tetrahymena species) play an important role in the biochemical cycles of aquatic ecosystems and have a potential application in arsenic biotransformation. This study compared arsenic tolerance, accumulation, methylation, and efflux in 11 Tetrahymena species. Nineteen arsenite (As(III)) S -adenosylmethionine (SAM) methyltransferase ( arsM ) genes, of which 12 are new discoveries, were identified, and protein sequences were studied. We then constructed recombinant cell lines based on the Tetrahymena thermophila ( T. thermophila ) wild-type SB210 strain and expressed each of the 19 arsM genes under the control of the metal-responsive the MTT1 promoter. In the presence of Cd 2+ and As(V), expression of the arsM genes in the recombinant cell lines was much higher than in the donor species. Evaluation of the recombinant cell line identified one with ultra-high arsenic methylation enzyme activity, significantly higher arsenic methylation capacity and much faster methylation rate than other reported arsenic methylated organisms, which methylated 89% of arsenic within 6.5 h. It also had an excellent capacity for the arsenic detoxification of lake water containing As(V), 56% of arsenic was methylated at 250 μg/L As(V) in 48 h. This study has made a significant contribution to our knowledge on arsenic metabolism in protozoa and demonstrates the great potential to use Tetrahymena species in the arsenic biotransformation of aquatic environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Weili Hao,Fanghua Yin,Ke Wang,Ling Ma,Kaoqi Lian,Hongmei Shi
Currently, antibiotic residues in the environment pose a serious public health risk; therefore, new sensitive approaches for detecting the presence of antibiotics are urgently needed. Ionic-type covalent organic frameworks (TAPB-(TFIT) + Cl − -COFs) were designed and prepared in this work, and these imine-linked COFs were characterized by several techniques, proving of porous structure and rich of nitrogen. The materials were applied to the extraction of β-lactams from aqueous samples, and the important parameters of the adsorption–desorption conditions were optimized. A dispersive solid-phase extraction method coupled with ultrahigh-performance liquid chromatography-tandem mass spectrometry (TAPB-(TFIT) + Cl − -COFs-d-SPE-UPLC-MS/MS) was proposed and utilized to determine the levels of 11 antibiotics in the β-lactams in the extracted samples. Good linearity (1.0–200.0 μg·L −1 , r > 0.9999) was achieved together with limits of detection and quantification of 0.01–0.92 μg·L −1 and 0.05–2.78 μg·L −1 , respectively; recoveries ranged from 75.57 to 114.20 %, conferring relative standard deviations < 8.99 % and negligible matrix effects (84.88–109.40 %). The synthesized TAPB-(TFIT) + Cl − -COFs were demonstrated to have good reusability and high stability. Furthermore, the proposed method was clearly shown to be sensitive and separable for the reliable simultaneous detection of 11 β-lactam residues in aquatic environments.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zizhen Xiao,Siyi Hong,Yinxiang Chen,Zhijun Zhang,Ye Zhang
The harmful effects of nanoplastics (NPs) on both human health and the ecosystem have gained global attention. This study develops a photoelectrochemical-electrochemical (PEC-EC) dual-mode portable sensor based on CdS/CeO 2 heterojunction for the rapid detection of polystyrene nanoplastics (PS NPs) in aquatic environments. The interaction and aggregation between protein and PS NPs, facilitated by hydrophobic properties, influence electron transfer, thereby enabling the detection of PS NPs. Integration of the sensor with a portable EC workstation controlled by a smartphone streamlines the detection process, yielding rapid and clear results, and enhancing convenience for detection. The sensor exhibits the advantages of high sensitivity, good repeatability, and exceptional portability. A wide detection linear range of 0.5–800 μg/mL accompanied by the detection limit of 0.38 ng/mL can be achieved. The relative standard deviation of the sensor for the inter-day (intra-day) precision are determined ranging from 0.4 % to 2.97 % (0.94 % to 4.65 %) in real water samples. Furthermore, the sensor features a self-checking function, establishing it as a dual-mode system that introduces a novel approach for smart detection of PS NPs, with substantial potential for assessing PS NPs pollution in aquatic environments.
✓ 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）