JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Congcong Chen,Meng Xie,Lingshuai Kong,Wenhui Lu,Zhenyu Feng,Jinhua Zhan
Peroxymonosulfate (PMS) activation by heterogeneous catalysts has been widely investigated to remove organic contaminants. Nevertheless, the technology is restricted to the bench-scale batch system. For practical applications, a supported catalyst design based on a reactor configuration with catalyst recovery is the need for future development. In this study, Mn 3 O 4 nanodots-g-C 3 N 4 nanosheets (Mn 3 O 4 /CNNS) composites were prepared via a facile hydrothermal method. The micro-structures and compositions of composites were investigated by a series of characterization methods. It was found that the Mn 3 O 4 nanodots (5−10 nm) were distributed uniformly over the CNNS. When the added amount of CNNS was 150 mg during the synthesis process, a composite named as Mn 3 O 4 /CNNS-150 was obtained, which exhibited the best performance on PMS activation for 4-chlorophenol (4-CP) removal. The Mn 3 O 4 /CNNS-150@PTFE membrane was synthesized by facile vacuum filtration. The catalytic membrane was applied in filtration experiments for the degradation of different contaminants. The stability tests revealed excellent stability of the catalytic membrane. The redox circles of Mn(IV)/Mn(III)/Mn(II) on the Mn 3 O 4 surface were the main source of activated PMS and a possible activation mechanism in the reaction system was provided. This study is of great significance for the development of novel catalytic membranes with PMS activation.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Hongjie Zhu,Zhihao Chen,Youyou Hu,Lingxuan Gong,Dandan Li,Zhengkui Li
The Z-scheme photocatalyst is valuable for use in polluted water purification. To improve the practical application value of the Z-scheme, in this study, a nano α-Fe 2 O 3 and P3HT composite photocatalyst array was synthesized by electrophoretic deposition for the first time. This material was named F1P. The EPR, VBXPS and in situ illumination XPS analyses indicated that the charge transfer path of F1P conforms to the Z-scheme, and F1P array has a high light energy conversion efficiency. Due to the advantages of the Z-scheme system and the good light harvesting ability, F1P exhibited a good degradation effect on different types of pollutants under visible light irradiation. The degradation efficiency of tetracycline and bisphenol A by F1P can reach 97 % and 99 %, respectively. Moreover, F1P showed a certain resistance to water quality changes. After four cycles, F1P can maintain the structural stability and good pollutant treatment effect. Due to the high redox ability of F1P, the complex structure of pollutants can be destroyed and the degradation path of pollutants in F1P system was also analyzed. This study provides a new way of synthesizing Z-scheme systems and immobilizing Z-scheme photocatalysts. F1P is a new material with high practicability.
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JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Qilong Xie,Jiangping Cao,Dekui Sun,Huaiqian Lu,Ming Xia,Bo Hou,Debao Li,Litao Jia
A sample preparation method for the extraction of bisphenol A (BPA) and tetrabromobisphenol A (TBBPA), potential endocrine-disrupting chemicals common in manufacturing, from environmental water samples was established by means of molecular-complex-based liquid-liquid microextraction coupled to high-performance liquid chromatography with diode array and mass spectrometric detection. In this method, tributyl phosphate acts as an extractant of BPA and TBBPA via hydrogen bond interactions. Additionally, no dispersants are needed. Attenuated total reflection Fourier transform infrared spectroscopy provides robust evidence for the formation of hydrogen bonds between the extractant and phenols in the molecular complexes, which supports the experimental results. Under optimised conditions, calibration plots were linear in the range of 0.05–2 μg mL − 1 , and detection limits ranged from 0.16 to 0.23 ng mL − 1 . The relative standard deviations of intra-day and inter-day repeatability were in the ranges of 3.5–4.9% and 5.1–6.8%, respectively, and recoveries ranged from 84.5 to 105.6%. The method we developed has been successfully employed in the measurement of BPA and TBBPA in four aqueous environmental samples.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Menghan Sun,Jinshuo An,Zonglin Pan,Guoqing Feng,Xinfei Fan,Chengwen Song,Tonghua Wang
Electrochemical filtration process (EFP) which adopted the coal-based carbon membrane (CCM) as both anode and filter was successfully applied for organic wastewater treatment and presented the promising prospects. In this work, a further enhancement on the wastewater treatment performance of EFP was achieved through the simple Fe 2+ addition (Fe-ECM). The mechanism of the enhanced treatment performance for Fe-ECM system was explored and the effect of operational parameters on the wastewater treatment performance of Fe-ECM system were studied. Results showed that Fe-ECM system established an almost 100% removal efficiency for 250 ppm RhB simulated wastewater when 13.2 μM Fe 2+ was added in the system, which was much higher than that of membrane filtration by CCM or electrochemical filtration carbon membrane (ECM) system. The performance enhancement of Fe-ECM system was attributed to the Fenton process: the hydrogen peroxide (H 2 O 2 ) was electrochemically generated on CCM via the reaction between H 2 O and dissolved oxygen, thus more hydroxyl radical (·OH) was produced in the Fe-ECM system compared with the ECM system through Fenton reaction between the generated H 2 O 2 and Fe 2+ in the solution. Moreover, the Fe-ECM system displayed a good applicability for the decontamination of different organic wastewater and a good reusability was observed for several cycles operation. This work provided an alternative way to enhance the organic wastewater treatment performance of ECM process.
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CHEMOSPHERE
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2021
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IF 7.086
Jinwen Yuan,Siyan Che,Li Zhang,Xiaomin Li,Junhua Yang,Xiaoming Sun,Zheng Ruan
Food is often exposed to multiple types of contaminants, and the coexistence of contaminants may have antagonistic, additive or synergistic effects. This study investigated the combinatorial toxicity of the three most widespread exogenous contaminants, decabrominated diphenyl ether (BDE-209), bisphenol A (BPA), and acrylamide (ACR) to HepG2 cells. A mathematical model (Chou-Talalay) and high-content analysis (HCA) were used to probe the nature of the contaminants’ interactions and their cytotoxicity mechanisms, respectively. The results highlighted that for the individual pollutants, the cytotoxicity order was BDE-209> BPA > ACR, and varying combinations of contaminants exhibited additive/synergistic effects. In general, combining multiple contaminants significantly increased intracellular reactive oxygen species (ROS), Ca 2+ flux, DNA damage and Caspase-3, and decreased mitochondrial membrane potential (MMP) and nucleus roundness, indicating that the additive or synergistic mechanism of the combined contaminations was disturbance to multiple organelles . This study emphasizes the complexity of human exposure to food contaminants and provides a scientific basis for formulating strict regulatory standards.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2021
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IF 6.291
Yuan Liu,Yaxin Yao,Wenjing Tao,Feng Liu,Songbai Yang,Ayong Zhao,Dan Song,Xiangchen Li
Bisphenol A (BPA) is a widely distributed environmental endocrine disruptor. The accumulation of BPA has been proved that produce various toxic effects both on human and animals. However, the strategies to reduce the damage of BPA on the body and related mechanisms remain to be studied. Coenzyme Q10 (CoQ10), as a powerful antioxidant, is ubiquitous in many eukaryotic cells, which can improve the integrity of lysosomal membrane, lysosomal degradation function and promote autophagy. Here, we examined the ability of CoQ10 to alleviate oxidative stress and apoptosis in BPA-induced damages in C2C12 cells, and how to alleviate it. Our results showed that BPA treatment significantly reduced cell viability, increased the number of cell apoptosis and ROS production, decreased mitochondrial membrane potential, and inhibited the gene expression of mitochondria biogenesis. Moreover, we demonstrated that exposure to BPA increased expression levels of autophagy protein (LC3-II, p62), inhibited autophagy flux, and disrupted the acidic pH environment of lysosomes. Importantly, CoQ10 supplementation effectively restored these abnormalities caused by BPA. CoQ10 significantly decreased the apoptotic incidence and ROS levels, improved mitochondrial membrane potential. Moreover, CoQ10 improved lysosome function and enhanced autophagy flux. Taken together, our results indicate that CoQ10 supplementation is a feasible and effective way to promote the level of autophagy by improving lysosomal function, thereby reducing the apoptosis caused by BPA accumulation. This study aims to provide evidence for the role of CoQ10 in repairing BPA-induced cell damage in clinical practice.
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ENVIRONMENTAL RESEARCH
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2021
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IF 6.498
Yang Li,Ruoyun Lin,Fangjie Lv,Xiaoyu Zhao,Tianzhi Yong,Xiaojun Zuo
A heterogeneous electro-Fenton (hetero-EF) system can effectively broaden the applicable pH range, although the decreased electrogeneration efficiency of H 2 O 2 at elevated pH (especially neutral conditions) is unfavorable for the efficient removal of organic pollutants. Herein, a tannic acid-Fe complex derivative-modified carbon felt (TFD@CF) cathode was prepared for hetero-EF treatment of organic pollutants over a wide pH range. Interestingly, the as-prepared hetero-EF cathode could act as a pH regulator that acidified the solution over a wide pH range. As expected, the TFD@CF cathode exhibited excellent hetero-EF activity for the removal of diverse organic pollutants (such as methyl orange, methylene blue , sulfamerazine, bisphenol A and 2,4-dichlorophenoxyacetic acid) at neutral and even alkaline pH (removal efficiency >90 %). A total of 2.98 kWh kg −1 COD −1 with 83.2 % COD removal could be achieved by the TFD@CF cathode for the treatment of actual textile dyeing secondary wastewater. Electrochemical characterizations proved that the TFD@CF cathode had excellent electrochemical properties with improved electron transfer ability and a well-pronounced Fe(III) electroreductive response. Meanwhile, more acidic groups were newly generated during the electrochemical reaction (an increase of 30.1 %), thus dissociating more H + into solution. The identification of reactive oxygen species suggested that OH and 1 O 2 could be responsible for the removal of organic pollutants in the TFD@CF EF system. These interesting findings may provide new insights into the design of multifunctional hetero-EF cathodes for the removal of refractory organic pollutants.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2021
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IF 7.963
Chao Gao,Yan-Hua Zeng,Cheng-Yong Li,Ling Li,Zhong-Hua Cai,Jin Zhou
Microbial degradation is an effective approach for the removal of Bisphenol A (BPA). During the biodegradation process, quorum sensing (QS) is a phenomenon that enables bacteria to coordinate collective behaviors based on cell density-dependent chemical signals. However, whether the degradation of BPA can be facilitated by this QS system (such as acyl-homoserine lactone, AHL) is unclear. To answer this question, the bifunctional Sphingonomas sp. strain YK5 that had BPA-degrading and AHL-producing properties was used. Biochemical analysis revealed that this bacterial strain mainly produced C8-HSL signals. Gene knockout experiments indicated that the AHL-system ( LuxI1/LuxI2 ) was required for efficient BPA degradation. RT-PCR analyses revealed that the AHL system positively regulated the relative expression of genes ( bisdA , CYP450 , hapA , ligAB , and proB ) involved in BPA degradation. Given that AHL signaling may be a common trait among BPA-degrading microorganisms and AHL system can regulate the degradation activity, manipulation of this system may be a valuable strategy to control BPA biodegradation.
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TALANTA
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2021
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IF 6.057
Lizhen Han,Xiaowan Zhang,Dan Li,Mengyuan Li,Peige Qin,Shufang Tian,Youmei Wang,Minghua Lu,Zongwei Cai
As a type of environmental endocrine disrupting chemicals , bisphenols (BPs) have a certain embryonic toxicity and teratogenicity, which can significantly increase the risks of breast cancer, prostate cancer, leukemia and other cancers. In this work, stable multivariate metal-organic frameworks (UiO-66-NH 2 /TCPP x ) were synthesized via in situ one-pot method and used as miniaturized dispersive solid-phase extraction (dμSPE) sorbents for extraction of trace BPs from environmental samples. The phase purity, crystal morphology and physical properties of UiO-66-NH 2 /TCPP x samples were varied by adjusting the mass ratio of TCPP . The extraction performance of UiO-66-NH 2 /TCPP x samples were investigated and UiO-66-NH 2 /TCPP 1.0 exhibited the highest adsorption efficiency. Besides, UiO-66-NH 2 /TCPP 1.0 possessed excellent recycling stability for the adsorption and desorption of BPs more than 20 cycles. The experimental parameters including amount of adsorbent, adsorption time, sample solution pH, temperature, desorption time and desorption solvents which affecting the efficiency of dμSPE were studied, respectively. Good linearity (R 2 > 0.9992) in range of 0.1–200 ng mL −1 was obtained. The detection limits (S/N = 3) and quantification limits (S/N = 10) were achieved at 0.03–0.08 ng mL −1 and 0.1–0.5 ng mL −1 , respectively. The relative standard deviations (RSDs) of intra-day and inter-day ranged from 2.5 to 5.5% and 1.1–6.8%. Enrichment factors were calculated in the range of 303–338. The obtained recoveries of bisphenol F (BPF), bisphenol A (BPA), bisphenol B (BPB) and bisphenol AF (BPAF) were 81.26–91.03% (RSDs = 0.96–6.47%), 82.2–97.27% (RSDs = 0.45–6.15%), 87.56–97.26% (RSDs = 1.1–6.22%) and 82.2–100.8% (RSDs = 0.46–4.07%). The UiO-66-NH 2 /TCPP 1.0 can be employed as potential dμSPE sorbents for the enrichment of trace BPs in the environmental samples.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Yanan Qin,Junmei Luo,Qingda An,Zuoyi Xiao,Jingai Hao,Yao Tong,Shangru Zhai
A facile and environmentally friendly method to synthesize efficient catalysts for activating peroxymonosulfate (PMS) to degrade contaminants is highly important yet remains challenging. By combining the superiorities of ordered Co/N@ZS and alginate hydrogels, namely regular and stable channels, large specific surface area, outstanding hydrophilicity and unique three-dimensional structure, an excellent recovery and recyclability catalyst, Co 0·6 /N@ZS-SA, exhibited outstanding performance in activating 0.50 g/L PMS for ciprofloxacin degradation (20 mg/L) with a high degradation rate of 82.52%. The effect of diversified influencing parameters, stability and recyclability on the degradation efficiency was systematically investigated. More importantly, the composite hydrogel with excellent recovery and recyclability could still degrade more than 63.4% CIP after three consecutive reactions. In addition, combined EPR analysis and ROS quenching research indicated that HO • , SO 4 •− , O 2 •− and 1 O 2 were generated but CIP degradation dominated by the radical mechanism comprising the yield of SO 4 •− . Besides, the intermediate products were identified by LC-MS analyses to propose the possible degradation pathways.
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ACS ES&T Engineering
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2021
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IF 0
Zihao Zhao,Xinhong Li,Hongchao Li,Jieshu Qian,Bingcai Pan
The combination of Co(II) and peracetic acid (PAA) is an important alternative advanced oxidation process (AOPs), in which R-O• radicals including acetyloxyl radicals (CH3C(O)O•) and acetylperoxyl radicals (CH3C(O)OO•) have been considered to be the primary reactive species for the oxidative degradation of contaminants. However, it is still unclear how the active Co species participates in this process. In this study, we conduct a series of experiments including chemical probing, radical quenching, electron paramagnetic resonance (EPR), and Co(III) oxidation to investigate the degradation mechanism of contaminants in the Co(II)/PAA process, using bisphenol A (BPA) as target pollutant. On the basis of these results, we propose a Co(II)-PAA complex (Co(II)-OO(O)CCH3) to be the primary reactive species, while R-O• radicals and Co(III) (available as dimeric Co-peroxide species) derived from the decomposition of Co(II)-PAA complex are the minor contributors for the oxidation of BPA. Factors, including PAA concentration, Co(II) concentration, solution pH, inorganic anions, and natural organic matters (NOM), that might affect the oxidation performance of the Co(II)/PAA process were also investigated systematically. This study sheds new light on the mechanistic understanding of the Co(II)/PAA process for the oxidation of contaminants in water.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Yao Tian,Lijia Liu,Fuqiu Ma,Xiying Zhu,Hongxing Dong,Chunhong Zhang,Fangbo Zhao
Uranium (U) is hazardous and radioactive, wastewater containing U(VI) should be treated before being discharged. Here, two novel uranium adsorbents, phosphorylated hyper-cross-linked bisphenol A (PHCP-1) and fluorene-9-bisphenol (PHCP-2) were separately synthesized via Friedel-Crafts reaction followed by phosphorylation using phosphorus oxychloride. PHCPs had a BET surface area (up to 564 m 2 /g) with pore sizes of 2.2–2.8 nm. These adsorbents were used for the first time for uranium adsorption from water and demonstrated outstanding adsorption performance. PHCP-2 had a great uranium adsorption capacity (297.14 mg/g) and a very fast sorption rate (85% removal rate within 5 min). The adsorption data were well fitted with Freundlich isotherm and the pseudo-second-order kinetic model. PHCPs displayed selective adsorption capacity for U(VI) from solution that including a variety of competing metal ions . The reusability was confirmed through three regeneration cycles. Based on a series of spectroscopic analyses, the mechanism of action between PHCPs and U(VI) is primarily derived from the complex between phosphate functional groups and U (VI). The sorption performance of PHCPs is attributed to their huge specific surface area and the strong complex between phosphate groups and U(VI). These findings suggest that PHCPs could be useful in the effective adsorption of uranium from water.
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