ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 9
·24398-24407
·
IF 5.19
Afzal Muhammad Zaheer,Hameed Salma,Mohiuddin Muhammad,Abbasi Asim
This study elaborates the simultaneous removal of three different fluoroquinolones (FQs), i.e., Norfloxacin (NOR), Lomefloxacin (LOM), and Enrofloxacin (ENR) from water using hydrogel beads of humic acid coated biochar (HA-BC) and chitosan. In our previous study, this adsorbent has already achieved tremendous results for the removal of a single FQ, i.e., ciprofloxacin. Now, initial concentrations of all FQs were set 100 mg/L each, and the maximum adsorbed amounts were 38.08 mg/g (NOR), 25.03 mg/g (LOM), and 29.72 mg/g (ENR). Adsorption attained equilibrium after 24 h, which obeyed the pseudo-second-order kinetic model. The mutation of humic acid-biochar/chitosan hydrogel beads (HBCB) with alcoholic solvents, i.e., methanol and ethanol to replace water decreased its sorption capacities from 38.08 mg/g (NOR) to 34.91 mg/g and 32.19 mg/g, respectively. Similarly, from 25.03 mg/g (LOM) to 22.81 mg/g and 19.91 mg/g, and 29.72 mg/g (ENR) to 26.52 mg/g and 24.64 mg/g. Adsorption isotherm data for all FQs were up to both Langmuir and Freundlich, but it suited more to that of Langmuir adsorption isotherm model. Sorption capacities, for all FQs, had a minor decline due to addition of NaCl, NaNO 3 , and Na 2 SO 4 . However, there was a huge decline when Na 3 PO 4 was added into the adsorption system. Adsorbent was desorbed and regenerated for consecutive removal, and it showed good adsorption in the 4 th cycle, i.e., 47 mg/g net adsorption. These results prove that HBCB is not only effective for adsorption removal of ciprofloxacin but also for other FQs too. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 9
·24606-24616
·
IF 5.19
Li Dan,Li Kang,Liu Yanzehua,Wang Liping,Liu Na,Huang Shaomeng
Polycyclic aromatic hydrocarbon (PAH) contamination in the environment involves multiple PAHs and various intermediates produced during the microbial metabolic process. A multi-substrate enrichment approach was proposed to develop a mixed bacterial community (MBC) from the activated sludge of a coking wastewater plant. The degradation performance of MBC was evaluated under different initial concentrations of PAHs (25–200 mg/L), temperature (20–35 °C), pH (5.0–9.0), salinity (0–10 g/L NaCl), and coexisting substrates (catechol, salicylic acid, and phthalic acid). The results showed that the degradation rates of phenanthrene and pyrene in all treatments were up to (99 ± 0.71)% and (99 ± 0.90)% after incubation of 5 days, respectively, indicating excellent biodegradation ability of PAHs by MBC. Furthermore, 16S rRNA gene amplicon sequencing analysis revealed that Pseudomonas was dominant, while Burkholderia had the largest proportion in acidic (pH = 5.0) and saline (10 g/L NaCl) environments. However, the proportion of dominant bacteria in MBC was markedly affected by intermediate metabolites. It was shown that MBC had a higher degradation rate of PAHs in the coexisting matrix due to the timely clearance of intermediates reducing the metabolic burden. Overall, our study provided valuable information to help design an effective strategy for the bioremediation of PAHs in complex environments.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2022
·Vol. 15
·期 1
·1-16
·
IF 23.655
Wang Chenxi,Liu Yue,Jia Zirui,Zhao Wanru,Wu Guanglei
Heterogeneous interface engineering is designed by electrospinning.
The introduction of Co 3 SnC 0.7 nanoparticles increased the loss mechanism.
Enhanced electromagnetic loss and improved impedance matching are achieved.
The absorbers exhibit high-efficient electromagnetic wave absorption performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·27315-27327
·
IF 5.19
Zhu Yating,Shen Jia,Guo Manli,Zheng Haoling,Cao Yujuan
In this work, nitrogen-doped magnetic porous carbon material (N-MPC) was prepared through the high-temperature calcination of low-cost [Fe(CN) 6 ] 3− -loaded anion-exchange resin, which was experimentally demonstrated to have significant adsorption performance for tetracycline (TC) in water. The N-MPC adsorbent with a large specific surface area (781.1 m 2 g −1 ) was able to maintain excellent performance in a wide pH range from 4 to 10 or in high ionic strength solution. The adsorption of TC on N-MPC was found to be more consistent with the pseudo-second-order model and Langmuir adsorption model, and the maximum adsorption capacity ( q m, cal ) was calculated to be 603.4 mg g −1 . As a recoverable magnetic adsorbent, the N-MPC remained a TC removal rate higher than 70% after four adsorption cycles. The adsorption mechanism was speculated on the basis of characterizations, where pore filling, hydrogen bonding interaction, and π-π electron donor–acceptor (EDA) interaction were crucial adsorption mechanisms. A variety of antibiotics were selected for adsorption, and excellent performance was found especially for TCs, indicating that the N-MPC can be used for the efficient removal of TCs from water.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·27357-27371
·
IF 5.19
Ma Qing-guang,Wan Yi-ping,Liu Ze-hua,Dang Zhi
Analytical method for three natural estrogens (NEs) and their sulfate and glucuronide conjugates in waste and river waters using solid-phase extraction (SPE) coupled with ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) has been available, but problems including poor recovery exist. In order to solve these, some optimizations have been performed in this work. For sample preparation, both rinse and elution solutions were optimized, in which 6 mL of MeOH/water (1:9, v/v), MeOH/Ace/water (10:2:88, v/v/v), and MeOH/NH 4 OH/water (10:2:88, v/v/v) were determined as the rinse solution, while 6 mL of 2.0% NH 4 OH/MeOH was determined as the elution solution for conjugated NEs (C-NEs). For mobile phase, addition of NH 4 F could obviously enhance the signal response of the nine target compounds, and the optimized addition concentration was 0.5 mmol/L. The developed efficient method was validated and showed excellent linearity for each target compound ( R 2 > 0.998), low limit of quantifications (LOQs, 0.07–1.29 ng/L) in four different water matrices, and excellent recovery efficiencies of 81.0–116.1% in influent, effluent, ultra-pure, and river water samples with low relative standard deviations (RSDs, 0.6–13.6%). The optimized method was successfully applied to influent, effluent, and Pearl River water, among which three NEs were all detected, while five C-NEs were found in the influent, three C-NEs were detected in the effluent, and two C-NEs were found in the Pearl River water, indicating the wide distribution of NEs and C-NEs in different water environments. This work provided a reliable and efficient analytical method for simultaneous trace determination of NEs and C-NEs, which had satisfactory absolute recoveries with low RSDs, low LOQs, and time-saving for both analysis and nitrogen drying.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-11
·
IF 6.408
Wang Jing,Xu Wei,Zhou Lin,Zhang Tianqi,Yang Na,Wang Min,Luo Xuemei,Jin Lu,Zhu Huaijun,Ge Weihong
The peroxidase-like activity of MXene@Fe 3 O 4 nanocomposites and the relevant colorimetric application have been investigated for the first time. According to a kinetic study, MXene@Fe 3 O 4 nanocomposites displayed higher peroxidase activity than their individual components, and the catalytic process followed a ping-pong mechanism. The improved peroxidase-like activity of the MXene@Fe 3 O 4 nanocomposites was obtained due to the synergetic impact of the Fe 3 O 4 and MXene phases, the huge ion-accessible interface, and quick electron transfer channels in the nanocomposites. In the presence of hydrogen peroxide (H 2 O 2 ), the MXene@Fe 3 O 4 nanocomposites can catalyze the reaction of the colorless substrate 3, 3, 5, 5-tetramethylbenzidine (TMB) into oxidized TMB which revealed a blue color at 652 nm. After the introduction of glutathione (GSH), the blue color was gradually fading owing to the hydroxyl radical scavenging effect of glutathione. A colorimetric detection platform based on the peroxidase-like activity of the MXene@Fe 3 O 4 nanocomposites was developed for H 2 O 2 and GSH with a detection limit of 0.4 μM and 0.5 μM, respectively. The calibration plot for glutathione detection is calculated by absorbance difference at 652 nm, which ranged from 0.5 to 10 μM with a detection limit of 0.2 μM. The recoveries of GSH with different concentrations ranged from 93.76 to 108.50% and the relative standard deviation from 0.30 to 5.96%. This work significantly extends the application of MXene@Fe 3 O 4 nanocomposites in the construction of colorimetric sensors and reveals a satisfactory result in real sample analysis. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 12
·2979-2989
·
IF 3.903
Jin JiaSheng,Xia Wei,Hu Pan,Yang Hu
Algae and suspended colloidal particles produced high turbidity in water, weakened water purification, and threatened the safety of the water supply. In this study, a series of composite coagulants (atp-st-CTA) composed of a cationic starch (st-CTA) and attapulgite (ATP) with different fed mass ratios were fabricated by a simple method to coagulate kaolin suspension with initial turbidity of 80.0 NTU and Chlorella suspension with 0.25 mg/L of chlorophyll a ( chla ), respectively. Fourier transform infrared spectroscopy and scanning electron microscopy investigated the structural characteristics of atp-st-CTA. The maximum turbidity and chla removal rates of atp-st-CTA were 92.2% and 100.0%, respectively, at natural pH conditions. The effects of the fed mass ratio of st-CTA to ATP in the composites, dose, pH, and coexisting humic acid on the coagulation performance of atp-st-CTA were comprehensively investigated. Based on the apparent coagulation behaviors, the zeta potentials of the supernatants after coagulation, and the flocs properties, the coagulation mechanisms of atp-st-CTA were discussed in detail. The complete charge neutralization due to st-CTA and the enhanced sedimentation by ATP synergistically removed turbidity and algae from the water efficiently. In short, atp-st-CTA as a talented material has a notable prospect in applications of water treatment owing to its advantages of environmental friendliness, low cost, and high efficiency.
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2022
·Vol. 65
·期 11
·2675-2686
·
IF 3.903
Han GaoJie,Xue PeiWen,Cai ZhengHao,Feng YueZhan,Liu ChunTai,Shen ChangYu
Two-dimensional (2D) boron nitride nanosheet (BNNS) is promising in polymer-based thermal management materials (TMMs) by pre-constructing three-dimensional (3D) thermally conductive skeleton, but it yet suffers from the challenges of high-effective exfoliation and affinitive compatibility with matrix. In this work, we developed a one-step exfoliation and deprotonation approach by the high-effective ball milling technique to prepare aramid nanofiber (ANF)/BNNS suspension. Under the strong collision/shear effect of ball-milling, micron-level hBN sheets were exfoliated into smaller and thinner BNNS with edge functional groups, meanwhile, poly-p-phenylene terephthalamide (PPTA) fibers were split into ANF by dissociating the intermolecular hydrogen bonds. More importantly, both the exfoliation and deprotonation could be accelerated by each other to achieve a 100% yield of ANF/BNNS suspension with strong hydrogen/covalent bonding interactions between them. Subsequently, the prepared ANF/BNNS suspension was used to construct 3D vertically aligned ANF/BNNS skeleton by the unidirectional freezing method. The obtained epoxy-based composite (EP/ANF/BNNS) revealed excellent thermal conductivity of 2.41 Wm −1 K −1 at 14.9 vol% BNNS loading due to the vertically oriented heat conduction paths and low interfacial thermal resistance in the skeleton. Moreover, EP/ANF/BNNS composite showed high thermal stability and extraordinary fire retardancy with dramatically decreased heat release rate (265 W g −1 ) and total heat release (20.6 kJ g −1 ). Therefore, this work demonstrates a high-efficient one-step ball-milling exfoliation and deprotonation technique for preparing ANF/BNNS suspension, which reveals an enormous potential in preparing advanced TMMs by constructing 3D thermally conductive skeletons.
✓ 已验证
产品关联
DOI
高影响因子
Waste and Biomass Valorization
·
2022
·Vol. 14
·期 7
·2419-2432
·
IF 3.449
Guo Dong,Liu Hantao,Zhang Yaohui,Wang Yingchun,Xiong Yaxuan
Massive accumulation of solid waste semi-coke ash (SCA) produced in industrial processes will damage local environment. To recycle SCA and fabricate low-cost thermal energy storage materials, the idea of fabricating the form-stable phase change materials (FSPCMs) with SCA as skeleton material and solar salt (SS) as phase change material was proposed innovatively. Seven FSPCMs with different SS content were prepared by compression and sintering method, and key performances were investigated by differential scanning calorimetry, constant-speed pressurization method, scanning electron microscopy, sessile drop method and X-ray diffraction. The research found that the sample A55 with 50 wt% SS showed the best performance; the thermal energy storage density of sample A55 was 483 J/g in the range of 100 to 450 °C; the compressive strength of sample A55 reached 86.12 MPa; the sample A55 had excellent chemical compatibility and thermal stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 42
·19730-19742
·
IF 4.682
Gao Qiang,Jia Liang,Zhang Aiqin,Wang Li,Peng Hao,Wang Wenkai,Zhou Shenglin,Xiang Jun,Chen Yi,Fan Haojun
A type of porous polyurea microspheres for matting coating were prepared by precipitation polymerization in H 2 O/Acetonitrile (AN) solution, using isophorone diisocyanate (IPDI) as polymerized monomer, 2, 4-diaminobenzenesulfonic acid sodium salt as hydrophilic monomer and polyvinylpyrrolidone (PVP) as porogen. The effect of the type of porogen, reaction temperature, dry methods, post-perforation method and polyvinylpyrrolidone loading on the surface porosity was investigated. Meanwhile, the effect of the surface porosity and roughness of microspheres on the matting properties of the coating was also investigated. The results indicated that PVP porogen has played an important role in regulating the surface porosity of microspheres and shows superior perforation. When 15 wt% PVP (based on isophorone diisocyanate loading) was used as porogen, the reaction was carried at 50 °C in a shorter time, and the crude product was dried in a state of water dispersion at 100 °C, the resultant microspheres with maximal porous surface can be achieved. Post-perforation can further increase the surface roughness and porosity of polyurea microspheres without changing its particle size. When 5 wt% porous polyurea microspheres were added to the water-based polyurethane (WPU) coating, the gloss of the coating decreased from 6.27° to 1.14° (60° incident angle). Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-9
·
IF 2.8
Chen Jiajia,Dai Fengting,Liu Haotian,He Zhengguang,Gao Hui,Liu Gen
In this work, three specialized oxidases for glucose, lactate and cholesterol are absorbed on carbon microspheres (CSs), which can produce hydrogen peroxide during their substrate-specific enzymatic activity. Electrochemiluminescent (ECL) is generated by the electrochemical reaction between luminol and hydrogen peroxide on an ECL biosensor array, whose light signals are collected by a CCD camera. Under optimum conditions, calibration curves are constructed for glucose, lactate, cholesterol concentrations and ECL intensities. The detection limits of the different biosensors are found to be 12 μM for glucose, 3 μM for lactate and 19 μM for cholesterol. Furthermore, the resulting ECL biosensor array is expected to be an alternative analytical tool in clinical analysis because of its good stability, acceptable precision and reproducibility.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 4
·1223-1234
·
IF 2.3
Kundu Chanchal Kumar,Li Zhiwei,Khan M. Azizur R.,Försth Michael,Das Oisik
Multi-functional textiles have received much attention in the technical textile field for their novel functionalities available in a single substrate. Polyamide 66 (PA66), being an engineering polymer with excellent physio-mechanical properties, exhibits immense possibilities to be developed as a multifunctional textile substrate. In this work, multi-functional polyamide 66 (PA66) textiles equipped with enhanced electro-conductive, hydrophilic and flame-retardant properties were developed via in situ polymerization of pyrrole monomer onto the PA66 fabric surfaces. Meanwhile, various formulations comprised of phytic acid (PA), chitosan (CS), graphene oxide (GO) and Na-metaborate (B) along with the pyrrole also experimented with a goal to study the contribution of each compound onto the desired properties and finally, to come up with a suitable formulation. Among these formulations, only pyrrole containing formulation (i.e., PA66-PPy) demonstrated a significant improvement in all three desired functionalities, namely a noteworthy escalation in electrical conductivity (i.e., about a 43 times increase compared to the pure PA66), a semi-hydrophilic surface (i.e., water contact angle value was lowered from 124.3– 49.9°) and a substantial reduction in the peak heat release rate by 45%. Meanwhile, the formulation comprising both the pyrrole and phytic acid made the polyamide surface a super-hydrophilic one, whereas other formulations exhibited potential efficacy in attaining better flame retardancy, especially in terms of limiting oxygen index (LOI) values, vertical flame test data and char yield%. Graphical abstract
✓ 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）