ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·
IF 5.8
Huang Jialu,Zhang Shuchi,Tan Mengyu,Shen Jie,Zhao Haiyan,Wu Donglei
Emerging contaminants (ECs) in aquatic environments have attracted attention due to their wide distribution and potential ecotoxicities. Sewage treatment plants (STPs) are proven to be the major source of ECs in the aquatic environment, while there remains insufficient understanding of the removal and risk assessment of ECs in STPs. Here, we clarified the degradation and risk impact of 13 ECs in two aquatic product processing sewage treatment plants (APPSTPs) along the southeast coast of China. The concentrations of ECs followed the order: endocrine-disrupting chemicals (1877.85–15,398.02 ng/L in influent, 3.37–44.47 ng/L in effluent) > > sulfonamide antibiotics (SAs, 75.14–906.19 ng/L in influent, 1.14–15.33 ng/L in effluent) > pharmaceutical and personal care products (PPCPs, 44.47–589.93 ng/L in influent, 2.54–34.16 ng/L in effluent) ≈ fluoroquinolone antibiotic (54.76–434.83 ng/L in influent, 10.75–32.82 ng/L in effluent) > other antibiotics (16.21–51.96 ng/L in influent, 0.68–6.17 ng/L in effluent). Moreover, the concentrations of PPCPs (decreased by 55.33–87.65% in peak fishing season) and antibiotics (increased by 44.99% in peak fishing season) were affected by fishing activities. In particular, the sequencing batch reactor (SBR) process had a better removal effect than the anaerobic-anoxic–oxic (A 2 /O) process on the treatment of some contaminants (e.g., norfloxacin and nonylphenol). Risk evaluations of ECs demonstrated that nonylphenol and SAs were at high- and low-risk states, respectively. Overall, our results provide important information for the degradation treatment of ECs, which is essential for pollutant management policy formulation.
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MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Zi-Chun Fan,Xiang Bai,Xian-Yong Wei,Xing Fan,Yierxiati Dilixiati,Zhuang Li,Qian-Qian Kong,Ji Zhao,Li Li,Jia-Hao Li,Zhi-Min Zong
The efficient and clean utilization of low-rank lignite conforms the strategy of carbon neutral development. Herein, a two-step strategy of hard template method and co-precipitation method was designed to prepare nickel nanoparticles supported on mesoporous carbon (Ni x /MPC) using the residue from the ethanolysis of Longquan lignite for quantitative detection of p -nitrophenol (NP). The electrochemical reduction properties of modified glassy carbon electrodes (GCEs) with different nickel loadings ( x = 10, 15, and 20 wt%) for NP were compared, in which Ni 15 /MPC/GCE stood out and presented better conductivity, larger electrochemical active surface area, and faster electron transfer rate. According to the differential pulse voltammetry detection results, Ni 15 /MPC/GCE displays satisfactory detection limit (1.8 µM) and far wider detection concentration range (170 ∼ 10000 µM) than other reported electrochemical sensors. Moreover, Ni 15 /MPC/GCE exhibits acceptable stability and reproducibility, and the relative standard deviation of NP detection current is only 0.71% under the interference of 100-fold concentration interfering substances. Hence, the constructed Ni 15 /MPC/GCE demonstrates a promising electrochemical sensor for detecting NP in environmental sewage.
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FOOD AND AGRICULTURAL IMMUNOLOGY
·
2023
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IF 3
Jiannan Chen,Xiuhua Xia,Peizhen Li,Hang Yu,Yunfei Xie,Yahui Guo,Weirong Yao,He Qian,Yuliang Cheng
As a type of environmentally deleterious compound, 4-nitrophenol (4-NP) has become a global concern due to its extreme toxicity to aquatic organisms and humans. Herein, we used naturally available crayfish shells as precursors to prepare a new type of carbon dots (CDs) by the hydrothermal method. The as-synthesized CDs exhibited strong blue fluorescence emission which can be sensitively quenched by 4-NP through the static quenching effect because of the formation of a ground state complex between CDs and 4-NP. Accordingly, a facile and rapid fluorescence sensor was developed to detect 4-NP from 0 μM to 50 μM with a limit of detection (LOD) of 0.16 μM. Furthermore, the proposed sensor was successfully applied for the detection of 4-NP in fresh crayfish meat and aquatic water samples.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 5
·2321-2326
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IF 3.3
Kailai Zhang,Qiuliang Wang,Zilong Zhong,Yali Luo,Jie Liu,Yunfei Liu,Yinong Lyu
A porous carbon with a high surface of up to 3142 m2 g−1 was synthesized by using a hypercrosslinked polymer (HCP-BHMB) as a precursor. Due to the large surface area and hierarchically porous structure, both HCP-BHMB and its derived porous carbon (HCP-BHMB-K-800) can be employed as supporting substrates to immobilize Ag nanoparticles (NPs). The as-prepared Ag@HCP-BHMB-K-800 nanocatalyst exhibits superior catalytic activity compared to most other reported Ag-based catalysts for the reduction of 4-nitrophenol.
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NANOTECHNOLOGY
·
2021
·Vol. 32
·期 17
·175501
·
IF 3.874
Jiamin Gao,Lu Huang,Zhuomin Zhang,Gongke Li
It is of great significance to construct specially designed gold nanocrystals (AuNCs) with precisely controllable size and morphology to achieve an excellent physicochemical performance. In this work, sea urchin-shaped AuNCs with tunable plasmonic property were successfully synthesized by the hybridized double-strand poly adenine (dsPolyA) DNA-directed self-assembly technique. Hybridized dsPolyA as the directing template had suitable rigidity and upright conformation, which benefited the controllable formation of these anisotropic multi-branched AuNCs with the assistance of surfactant. The effects of essential conditions influencing the synthesis and precise morphology control were investigated in detail. COMSOL simulation was used to evaluate their electromagnetic field distribution according to their morphologies, and the result suggested that sea urchin-shaped AuNCs had abundant 'hot spots' for surface-enhanced Raman scattering (SERS) detection due to their regular nanoprotuberance structure. Finally, sea urchin-shaped AuNCs with excellent SERS and catalytic performance were applied for the quantitative analysis of food colorant and catalytic degradation of potential pollutants. The SERS enhancement factor of sea urchin-shaped AuNCs was up to 5.27 × 106, and the catalytic degradation rate for 4-NP by these AuNCs was up to −0.13min−1.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Yangke Long,Jian Dai,Shiyin Zhao,Yiping Su,Zhongying Wang,Zuotai Zhang
Pollutant degradation via periodate (IO4–)-based advanced oxidation processes (AOPs) provides an economical, energy-efficient way for sustainable pollution control. Although single-atomic metal activation (SMA) can be exploited to optimize the pollution degradation process and understand the associated mechanisms governing IO4–-based AOPs, studies on this topic are rare. Herein, we demonstrated the first instance of using SMA for IO4– analysis by employing atomically dispersed Co active sites supported by N-doped graphene (N-rGO-CoSA) activators. N-rGO-CoSA efficiently activated IO4– for organic pollutant degradation over a wide pH range without producing radical species. The IO4– species underwent stoichiometric decomposition to generate the iodate (IO3–) species. Whereas Co2+ and Co3O4 could not drive IO4– activation; the Co–N coordination sites exhibited high activation efficiency. The conductive graphene matrix reduced the contaminants/electron transport distance/resistance for these oxidation reactions and boosted the activation capacity by working in conjunction with metal centers. The N-rGO-CoSA/IO4– system exhibited a substrate-dependent reactivity that was not caused by iodyl (IO3·) radicals. Electrochemical experiments demonstrated that the N-rGO-CoSA/IO4– system decomposed organic pollutants via electron-transfer-mediated nonradical processes, where N-rGO-CoSA/periodate* metastable complexes were the predominant oxidants, thereby opening a new avenue for designing efficient IO4– activators for the selective oxidation of organic pollutants.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Qianhua Ke,Jiao Yang,Huan Liu,Zhuoquan Huang,Lingling Bu,Dengpeng Jin,Chunhong Liu
Nonylphenol (NP) is a representative environmental endocrine-disrupting compound that can induce oxidative stress in organisms. The Kelch-like ECH-associated protein 1 (Keap1)-nuclear factor erythroid 2-related factor 2 (Nrf2) signaling pathway acts an important role in preventing oxidative stress. The aim of this study was to investigate the influence of oxidative stress caused by NP on Keap1-Nrf2 pathway in rats. Rats were treated with NP (30, 90, 270 mg/kg) for different exposure time (7, 14 and 28 days). The levels of reactive oxygen species (ROS) in serum and glutathione S-transferase (GST), UDP-Glucuronosyl Transferase (UGT) in liver were detected by ELISA kits. Western blot was used to detect Keap1, Nrf2 protein expression in liver and cerebral cortex. The results showed that 28 days of NP exposure significantly increased ROS levels in NPH group. And 14 days exposure to NP significantly enhanced the levels of GST and UGT, while 28 days of exposure showed a suppressive effect. In liver, Keap1 levels was upregulated at 7, 14 and 28 days of NP exposure, while nuclear Nrf2 levels decreased at 7 and 28 days but increased at 14 days. In cerebral cortex, Keap1 and Nrf2 expression increased at 14 days but decreased at 28 days. Besides, with the prolongation of NP exposure time, the GST and UGT levels in NPM and NPH groups were increased firstly and then decreased, while Keap1 and Nrf2 protein levels were constantly decreased in liver and cerebral cortex. In conclusion, the lower dose and shorter exposure time of NP activated the Keap1-Nrf2 pathway that may reduce the damage of oxidative stress, but when further exposed to NP at higher dose and time, the pathway could be inhibited.
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Wei Liu,Shao-Qing Li,Wei-Xing Liu,Qiang Zhang,Jia Shao,Jin-Lei Tian
A convenient and rational route is designed to synthesize B, N co-doped porous carbon materials (BNPCs) via a two-step calcination method derived from adenine-based bio-MOF-1. By using the adenine from bio-MOF-1 precursor as the endogenous N source and boric acid as the exogenous B source, the N and B elements are uniformly doped in metal-free BNPCs. B has lower electronegativity than C, leading to a higher positive charge density and the enhanced activation of C atoms. Owing to the synergistic effect between B and N, the co-doped catalysts not only increase electrical conductivity of catalysts to improve electron transfer , but also produce more additional active sites to intensify the catalytic performance for the reduction of 4-NP. The as-synthesized carbon materials have abundant mesopores , graphite structure, dual heteroatoms doping and thus excellent catalytic performances. In particular, BNPC-1000, obtained by pyrolysis at 1000 °C, shows superior catalytic efficiency of 95.2% and high catalytic cycling stability for the 4-NP reduction.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Teng Chen,Zhiyu Liu,Kai Zhang,Bolin Su,Zhenhua Hu,Hongri Wan,Yan Chen,Xinkai Fu,Zhaojian Gao
A functional material integrated with a variety of functions is highly desired in wastewater treatment. In this research, a mussel-inspired method of immobilizing silver nanoparticles on the skeleton of a melamine sponge is proposed and applied for water remediation. Ag NPs were reduced in situ and grown on a polydopamine-modified melamine sponge. The catalytic reduction of 4-nitrophenol (4-NP) in the presence of the obtained MS-PDA-Ag was evaluated, and the results demonstrated that the MS-PDA-Ag presented high catalytic reduction activity. In addition, the monolithic MS-PDA-Ag presents excellent reusability with no remarkable decrease in catalytic efficiency after multiple reuses. Owing to the immobilized Ag NPs, the MS-PDA-Ag can also effectively inhibit the growth of bacteria against both gram-positive and gram-negative species, making it possible for bacteria elimination in polluted water. To further explore the possibility of utilizing the MS-PDA-Ag for versatile applications, a superhydrophobic derivative (S-MS-PDA-Ag) was prepared by coating a low-surface-energy substance (octadecanethiol) on the surface of MS-PDA-Ag. The obtained S-MS-PDA-Ag presents the capacities of oil/organics adsorption and water repellence, which can separate the insoluble oil/organics from water. The melamine sponge immobilized with Ag NPs demonstrates prominent catalytic reduction of 4-NP, antibacterial activity and the superhydrophobic derivative presents the capacity of insoluble oil/organics separation from oil–water mixtures, exhibiting high potential in the remediation of polluted water.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tianhui Wang,Jiang Xiao,Xiaoli Yang,Yonghui Zhao,Rui Hu,Jianjun Ding,Yi Gong,Xingyou Tian
Encapsulation of plasmonic nanoparticles in nanoshells is a promising strategy to overcome their oxidation-coalescence in the heterogeneous catalysis process. Tailoring of nanostructure/functionality to enable the efficient synergistic integration of core and shell is highly desired to enhance the plasmonic catalysis. This study applied a one-step arc discharge to design graphite-encapsulated silver (Ag@G) catalysts with tunable morphologies (14.3–46.9 nm of cores, 1.38–3.43 nm of shells) and surface functionalities (hydrophobization, or amination with maximum 2.70 × 10 17 /mg of Ag@G). Highly nanostructure/functionality-dependent catalysis of aquatic pollutants was established. Specifically, tailoring defective shells with thinner thickness enabled the efficient synergism of strong π-π coordination of 4-nitrophenol and effective electron transfer of donors. Aminated Ag@G with ultrathin shells presented an optimal reduction for Cr(VI), establishing a negative relation of thickness with formic acid-induced reduction. Amino with proper densities (9.6–20.9/nm 2 ) induced the capture of Cr(VI) ultrafast. Moreover, reductive N heteroatoms with proper densities ( e.g. , 27.7 of N/nm 2 ) provided abundant lone pair electrons without the dramatic decline of conductivity, ensuring a favorable reduction of Cr(VI). Since arc discharge was versatile for the industrial production of nanomaterials, our work would trigger a new upsurge to arc-design nanostructures/functionalities for the catalysis and decontamination.
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JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Deshan Cheng,Yali Zhang,Changwang Yan,Zhongming Deng,Xiaoning Tang,Guangming Cai,Xin Wang
Surface-enhanced Raman scattering (SERS) spectroscopy as an effective method in sensitive detection applications has attracted more and more attentions recently. In this work, polydopamine was taken to achieve the modification of PET film surface for in-situ growth of three-dimensional (3D) ZnO/Ag nanocomposites. Ag nanoparticles on cluster-like ZnO nanorods surface were applied as Raman hot spots for target molecules detection. SEM, XPS, and XRD were used to characterize the microstructures and morphologies of 3D SERS substrates. pATP molecules were selected to measure the sensitivity, uniformity, and durability, the surface-enhanced enhancement mechanism of Raman scattering was analyzed by finite difference time domain (FDDT) simulation method. Malachite green (MG) was further used as the demonstrative pesticide residue, and the catalytic activity was studied by the deoxidization of 4-nitrophenol (4-NP). This work has indicated that SERS substrates exhibited the advantages of facile fabrication process, low cost, high sensitivity, good stability and excellent uniformity, which can be used for the rapid Raman enhanced spectroscopy analysis of environmental pollutants.
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CARBON
·
2021
·
IF 9.594
Huijie Liu,Ye Liu,Liming Wang,Xiaohong Qin,Jianyong Yu
Interfacial solar steam generation is considered as an effective and environment-friendly technology for clean water production. However, the preparation of an evaporator with omnidirectional light harvesting, high evaporation rate , catalytic and antibacterial properties simultaneously remains a great challenge. Herein, we report the Ag nanoparticles decorated MXene nanosheets/polyacrylonitrile (Ag@MXene/PAN) nanofiber based evaporators for high-efficiency, multifunctional and omnidirectional solar steam generation by solution electrospinning technology. The conjunction of Ag nanoparticles and MXene nanosheets not only enhances the broadband light absorption and heat production, but also contributes to the good catalytic and antibacterial performance. Furthermore, the flexibility and foldability of Ag@MXene/PAN nanofiber membranes enable the design of 3D fine-structure evaporator with increased evaporation surface area and optimized light absorption. As a proof of concept , Ag@MXene/PAN nanofiber based origami evaporator is constructed, which demonstrates relatively stable evaporation rates during a wide range of incident angle from 30° to 150°. The maximum evaporation rate reaches 2.08 kg m −2 h −1 under 1 sun illumination , far superior to the state-of-the-art solution-electrospun nanofiber based evaporators. Integration of structure flexibility, high performance and multi-functionality makes the designed nanofiber based evaporator promising for practical clean water production.
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