ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2019
·Vol. 26
·期 15
·15011-15018
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IF 2.914
Yi Xianliang,Chi Tongtong,Li Zhaochuan,Wang Jianfeng,Yu Mingyue,Wu Minghuo,Zhou Hao
The combined effect of polystyrene (PS) particles and triphenyltin chloride (TPTCl) to the green algae Chlorella pyrenoido s a was studied. The 96 h IC 50 of TPTCl to the green algae C. pyrenoidosa was 30.64 μg/L. The toxicity of PS particles to C. pyrenoidosa was size-dependent, with the 96 h IC 50 at 9.10 mg/L for 0.55 μm PS but no toxicity observed for 5.0 μm PS. The exposure to 0.55 μm PS led to damage on structure of algal cells, which could in turn cause inhibition on photosynthesis and population growth of the green algae. TPTCl concentrations in test medium were lowered by 15–19% at presence of 0.55 μm PS particles, indicating a reduced bioavailability of TPTCl. In spite of this reduced bioavailability, the presence of PS increased the toxicity of TPTCl, which might be attributed to facilitated uptake of TPTCl by the green algae after the damage of cell structure. The overall results of the present study provided important information on the effect of PS on the bioavailability and toxicity of TPTCl to phytoplankton species.
研究领域:
环境科学
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毒理学
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2019
·
IF 3.206
Yuehai Li,Fengjiao Liu,Jiabai Cai,Xuguang Huang,Luxiu Lin,Ye Lin,Hui Yang,Shunxing Li
Carbon dots co-doped with nitrogen and sulfur (N/S-CDs) were prepared with the model bloom-forming green alga Dunaliella salina via a one-step hydrothermal reaction , i.e., no chemicals were required. The obtained N/S-CDs with average particle size about 3.2 ± 0.5 nm exhibited great photostability, low toxicity, high water solubility, excitation-dependent emission, and enough fluorescent activity. According to the synergy effect of the co-doped nitrogen and sulfur atoms, N/S-CDs were used as multifunctional fluorescent probes for algal imaging, scavenging of 1, 1-diphenyl-2-picrylhydrazyl and hydroxyl radicals , selective detection of Fe(III), and visible light-induced photodegradation of methylene blue and methyl violet. In a word, harmful green alga blooms could be transformed into multifunctional N/S-CDs.
研究领域:
生物化学
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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
Journal of Advanced Research
·
2020
·
IF 6.992
Jinyun Li,Ming Guo,Yiping Wang,Bihuan Ye,Youwu Chen,Xuejuan Yang
Introduction Green algae seriously affect the quality and yield of Torreya grandis, it is important to explore new, environmentally friendly ways to control it. Objectives The present study aimed at preparing sustained-release algae-killing nanocapsules without pollution to the environment. Methods In this work, sodium carboxymethylcellulose (CMC), sodium alginate (SA), and chitosan (CTS) were used as raw materials in acylation reaction with the photosensitive catalytic material iron octaaminophthalocyanine (T) to generate the photoactive bio-based materials T-CMC, T-SA, and T-CMCS. Cinnamaldehyde and 2-aminobenzimidazole were combined using chemical grafting to produce a new algicide, and then formed nanocapsules by phase separation. The molecular structure of products was characterized by UV–Vis, FTIR, and NMR ( 1 H NMR, 13 C NMR). The particle size of the nanocapsules was determined by Zeta particle size analysis and TEM; DSC was used to investigate the thermal stability; The encapsulation efficiency and sustained-release performance were determined by HPLC. Then the phytotoxic of the new algicide was measured. Results The bio-based nanocapsules was successfully synthesized, which had a particle size of 10–30 nm and was stable at 40 °C. The encapsulation efficiency of the nanocapsules was 48.77%, the cumulative release rate was 83%, and the new algicide killed the green algae in a dose-dependent way. Conclusions The bio-based nano capsule is a new and valuable Sustained-release capsule, which is the method of green algae.
研究领域:
环境科学
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生物学
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DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 70
·41022-41030
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IF 3.049
Feilong Dong,Qiufeng Lin,Cong Li,Tuqiao Zhang
Blue-green algae commonly bloom in fresh water in summer, producing extra- and intra-cellular algal organic matters, which are important precursors for disinfection byproduct (DBP) formation. In this study, we evaluated the effect of pre-oxidation with ferrate(VI) (FeO42−, Fe(VI)) on the characterization of intracellular organic matter (IOM) and extracellular organic matter (EOM). The results indicated that soluble microbial-like products of EOM and IOM decreased and humic acid-like products of IOM increased, which would influence the DBP formation in the subsequent chlorination step. Therefore, in this study, the effect of Fe(VI) pre-oxidation on the DBP formation from IOM and EOM with subsequent chlorination was also investigated. For Chlorella sp., EOM presented no significant change, and IOM presented a reduction of THMs (8.2%) after Fe(VI) oxidation at a dosage of 16 mg L−1. For P. limnetica, EOM and IOM both exhibited reduction of trihalomethanes (THMs) and chloral hydrate (CH) after Fe(VI) oxidation. Besides, THMs had the lowest concentration at pH 8.0 in all four solutions. Haloacetonitriles (HANs) and haloketones (HKs) showed slight changes with increasing pH values. Due to the frequent detection of bromide (Br−) in surface water, the effect of bromide existence on THM formation was also investigated. The results indicated that all brominated DBPs increased, and chlorinated DBPs decreased with the increase in bromide concentration. In addition, the bromine substitution factor (BSF) of Chlorella sp. and P. limnetica both increased with the increase in Br− concentration.
研究领域:
环境科学
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水处理工程
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产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Lili Wang,Yuhui Zhang,Yupeng Chen,Lei Jiang
Natural organisms have evolved various biological ion channels to make timely responses toward different physical and/or chemical stimuli, giving guidance to construct artificial counterparts and expand the corresponding applications. They have also shown promising potential to overcome disadvantages of traditional electronic devices (e.g., energy-consuming operation and adverse humidity interference). Herein, we constructed a green alga-inspired nanofluidic system based on a Janus dual-field heterogeneous membrane (i.e., J-HM), which can function underwater as an artificial visual platform for light perception through enhanced active ion transport. The J-HM was obtained through sequentially assembled MXene and Cu-HHTP (i.e., a metal–organic framework based on the reaction between 2,3,6,7,10,11-hexahydroxytriphenylene hydrate (HHTP) and Cu2+) building units. Due to the formed temperature gradient and intramembrane electric field caused by the localized thermal excitation and efficient charge separation of J-HM under illumination, thermo-osmotic and photo-driven forces are generated for preferential cation transport from Cu-HHTP to MXene. Furthermore, unidirectional active transport can be enhanced by self-diffusion under a concentration gradient. Then, the corresponding underwater light perceptions at various light illumination conditions are explored, showing nearly a linear correlation with the light intensity. Finally, it is demonstrated that the visual platform can achieve object shape, definition, and distance recognition using a defined pixelated matrix, giving impetus to develop ionic signal transmission based sensing systems.
研究领域:
生物物理学
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材料科学
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仿生学
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Xinya Luo,Anran Zhang,Lihua Wu,Yunzhi Fu
Green synthesis of multifunctional nanocatalysts has been a focal point in scientific research. In this work, we investigated the eco-friendly synthesis of gold nanoparticles (AuNPs) using Gracilaria lemaneiformis biomolecule extract (Gbe) and explored their application potential in colorimetric sensing and catalysis. Gbe contains a significant number of oxygen-functional groups with reducing properties, enabling the reduction of Au 3+ to Au 0 , leading to the formation of uniform nanoparticles . Simultaneously, Gbe can establish hydrogen-bond interactions with p-phenylenediamine (p-PD), allowing Gbe-modified AuNPs to detect p-PD using a colorimetric approach (the detection limit was 0.039 μM). Furthermore, quantitative analysis of p-PD can be performed by measuring Red-Green-Blue (RGB) values with a smartphone equipped with the Color Picker app, offering a reliable and straightforward real-time analytical method. Additionally, the synthesized small-sized AuNPs demonstrate superior catalytic activity in the conversion of p-nitrophenol (p-NP) to p-aminophenol (p-AP) ( k = 0.6 min −1 ). Theoretical calculations were conducted to elucidate the reduction mechanism of p-NP. This study highlights the intrinsic potential of algae as a bioresource for synthesizing multifunctional AuNPs in an eco-friendly manner, providing a potentially economical solution for achieving efficient pollutant detection and environmental remediation.
研究领域:
环境科学
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纳米生物学
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化学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Yibo Zhang,Ming Li,Fang Chang,Malan Yi,Hongmei Ge,Jie Fu,Chenyuan Dang
Cyanobacteria and green algae are the OECD recommended test organisms for environmental toxicity assessments of chemicals. Whether the differences in these two species' responses to the identical chemical affect the assessment outcomes is a question worth investigating. Firstly, we investigated the distinct resistance mechanisms of Synechococcus sp. (cyanobacteria) and R. subcapitata (green algae) to sulfamethoxazole (SMX). The antioxidant system analysis demonstrated that R. subcapitata mainly relies on enhancing the activity of first line defense antioxidants, including superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx), which is the most powerful and efficient response to get rid of ROS, whereas Synechococcus sp. depends upon increasing the activity of glutathione-S-transferase (GST) and GPx to resist oxidative stress. Besides, a total 7 transformation products (TPs) of SMX were identified in R. subcapitata culture medium. The analysis of conjectural transformation pathways and the predicted toxicity indicates that R. subcapitata could relieve SMX toxicity by degrading it to low eco-toxic TPs. Additionally, we summarized numerous exposure data and assessed the environmental risk of various antibiotics, revealing an inconsistent result for the same type of antibiotic by using cyanobacteria and green algae, which is most likely due to the different resistance mechanisms. In the future, modified indicators or comprehensive assessment methods should be considered to improve the rationality of environmental toxicity assessments.
研究领域:
环境科学
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毒理学
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生态学
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产品关联
DOI
PubMed
高影响因子
Marine Drugs
·
2025
·Vol. 23
·期 10
·374
·
IF 5.4
Shan Liu,Ling Qin,Dan Li,Fang Lu,Mengdi Liang,Jiejie Hao
Polysaccharides derived from green algae have garnered significant attention owing to their distinctive structural characteristics and biological activities. In particular, sulfated polysaccharides from these algae represent a promising frontier in the discovery of novel therapeutic agents. In this present study, a sulfated galactan fromCaulerpa taxifolia, designated SGC, was obtained by dilute alkali extraction and chromatographic purification. On the basis of chemical and spectroscopic analyses, the backbone of SGC was constituted by a backbone of →3)-β-d-Galp-(1→ with sulfate substitution at the C-2 and a branch on C-6. The side chains contained →6)-β-d-Galp(2SO4)-(1→, →6)-β-d-Galp(3OMe)-(1→ and →3)-β-d-Galp(4,6-Pyr)-(1→ units. SGC possessed strong hypoglycemic activity in vitro, as evaluated by an assay of α-amylase inhibition. The anti-diabetic activity of SGC in vivo was further investigated using T2DM mice induced by high-fat diet combined with streptozotocin. The results indicated that SGC markedly restored body weight, reduced fasting blood glucose and possessed a significant glucose-regulating effect. Furthermore, SGC effectively increased insulin sensitivity and mitigated insulin resistance. Additionally, SGC effectively regulated lipid metabolism and alleviated oxidative stress. Notably, SGC ameliorated liver and pancreas damage induced by high-fat diet combined with streptozotocin. The investigation demonstrates that SGC is a unique sulfated galactan and has potential as a novel anti-diabetic agent.
研究领域:
天然产物化学
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药用植物学
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分子药理学
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代谢性疾病
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海洋药物学
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糖生物学
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内分泌学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Sciences
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2025
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IF 6.3
Qiong Zeng,Ruohua Qu,Qiong Wen,Na Liu,Fei Ge
Microplastics (MPs) and nanoplastics (NPs) can alter the behavior of co-existing pollutants in aquatic environments through their interactions. However, limited information was available on how the interactions between photoaged MPs/NPs and nanoparticles affect the extracellular aggregation and intracellular accumulation of nanoparticles and their associated ecological risk. Here, we investigated the effects of interactions between photoaged polystyrene MPs and NPs (aged PS MPs/NPs) and zinc oxide nanoparticles (nano-ZnO) on the green alga Chlorella vulgaris . Results proved that the adsorption of nano-ZnO on aged PS MPs/NPs, particularly aged PS NPs, via electrostatic force and hydrogen bonds was enhanced compared to that on pristine PS MPs/NPs. Molecular dynamic simulations confirmed stronger electrostatic force and van der Waals force between nano-ZnO and aged PS MPs/NPs. Furthermore, the binding affinity dissociation constant of nano-ZnO to the algal cells (32.4 and 45.0 μmol/L) in the presence of aged PS MPs/NPs was significantly higher than that of pristine PS MPs/NPs (24.0 and 7.0 μmol/L). The enhanced extracellular aggregation of nano-ZnO by aged PS MPs/NPs inhibited the Zn intracellular accumulation in algal cells. Nevertheless, this inhibitory effect was relatively weak for PS NPs due to their internalization carrying nano-ZnO into the algal cells. Despite the reduction of Zn intracellular accumulation, aged PS MPs/NPs still increased the ecological risk of nano-ZnO to aquatic organisms from medium to high risk through aggregation. These findings provide deeper insights into the environmental behavior and ecological risk of aged MPs/NPs.
研究领域:
环境科学
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纳米技术
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水生毒理学
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生态学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
·
IF 6.9
Lin Liu,Xinyi Wang,Xiaomei Zhen,Shuran He,Xin Zhang,Yulong Zhang,Yonglin Liu
Tetracycline (TC) and cadmium (Cd(II)) often coexist in environments such as soil and water, posing synergistic toxicity risks. In this study, a Iron (II) sulfide- Enteromorpha prolifera carbohydrate hydrogel (FeS-EP-HD) was synthesized via direct precipitation for the simultaneous removal of TC and Cd(II) from water and soil. The maximum adsorption capacities for TC and Cd(II) were determined to be 213.6 mg/g and 213.8 mg/g, respectively. Mechanisms included precipitation, ion exchange, and coordination for Cd(II), while hydrogen bonding and pore filling for TC. In binary contamination system, FeS-EP-HD possesses co-adsorption sites for both TC and Cd(II). However, Cd(II) exhibited a stronger competitive adsorption affinity, rapidly occupying adsorption sites and consequently inhibiting TC uptake. The formation of FeS-CdS voltaic effect, which further accelerates the adsorption of TC. Additionally, adsorbed TC also provided additional sites for Cd(II) via cation-π interactions. In soil in-situ remediation trials, upon introducing 1.5 ‰ FeS-EP-HD into contaminated soil, reducted in TC and Cd(II) concentrations by 48 μg/kg and 0.6 mg/kg, with removal efficiencies of 50.5 % and 47.9 %, respectively. This work demonstrates the potential of FeS-EP-HD as a efficient, eco-friendly material for co-contaminant remediation.
研究领域:
环境科学
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材料科学
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土壤修复
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水处理
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吸附技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Plants
·
2024
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IF 15.8
Zhang Aihong,Tian Lin,Zhu Tong,Li Mengyu,Sun Mengwei,Fang Ying,Zhang Yi,Lu Congming
Photosystem I (PSI) is one of two large pigment–protein complexes responsible for converting solar energy into chemical energy in all oxygenic photosynthetic organisms. The PSI supercomplex consists of the PSI core complex and peripheral light-harvesting complex I (LHCI) in eukaryotic photosynthetic organisms. However, how the PSI complex assembles in land plants is unknown. Here we describe PHOTOSYSTEM I BIOGENESIS FACTOR 8 (PBF8), a thylakoid-anchored protein in Arabidopsis thaliana that is required for PSI assembly. PBF8 regulates two key consecutive steps in this process, the building of two assembly intermediates comprising eight or nine subunits, by interacting with PSI core subunits. We identified putative PBF8 orthologues in charophytic algae and land plants but not in Cyanobacteria or Chlorophyta. Our data reveal the major PSI assembly pathway in land plants. Our findings suggest that novel assembly mechanisms evolved during plant terrestrialization to regulate PSI assembly, perhaps as a means to cope with terrestrial environments.
研究领域:
植物生物学
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分子生物学
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光合作用
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DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Zhuang Wang,Fan Zhang,De-Gao Wang
A prediction method that integrated a mixture descriptor with an established mixture toxicology method was proposed for the joint toxicity of chemical pollutants. A weighted descriptor derived from the single descriptor of each component was employed to calculate a mixture descriptor, which was successfully embedded into the generalized concentration addition (GCA) model named the extended GCA (XGCA) model. To develop and validate the proposed approach, binary antibiotic mixtures (ciprofloxacin and oxytetracycline) and metal-oxide (copper oxide and zinc oxide) nanoparticle mixtures were selected to study their toxicity to freshwater green algae. The results showed that concentration-response curve (CRC) derived from the XGCA model was closer to the observed CRC than those from the GCA, Concentration Addition (CA), and Independent Action (IA) models. The difference between effect concentrations predicted by the XGCA model and observed did not exceed a factor of 1.6. The XGCA model was relatively more accurate at predicting joint toxicity (in terms of effect concentrations and effect errors) than the reference models, independent of component types and mixture ratios. The XGCA model predicts the joint toxicity through molecular structural or nanostructural characters, thus modes of toxic action are not preconditions for predicting the toxicity of the mixtures. This result demonstrates the practicability of using the XGCA method in toxicity assessments of mixture pollutants with unknown modes of action.
研究领域:
环境毒理学
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化学工程
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纳米技术
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水生生物学
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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）