CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yue Bu,Nannan Wu,Yumeng Qi,Junyan Wei,Xiaosheng Tang,Ahmed A Allam,Ping Sun,Zunyao Wang,Ruijuan Qu
Polychlorinated biphenyls (PCBs) in soil are difficult to remove by biodegradation, photodegradation and other conventional oxidation methods. This work tried to use FeS-activated persulfate (PS) combined with permanganate (KMnO 4 ) to treat PCBs contaminated soil using 3,3′,4,4′-tetrachlorobiphenyl (PCB77) as a model pollutant. Compared with Fe 0 /PS and KMnO 4 /PS systems, the FeS/PS system showed a stronger degradation effect on PCB77. After reacting for 4 h in FeS/PS system, the addition of KMnO 4 could increase the degradation efficiency of PCB77 from 50.27% to 79.20% in a total reaction time of 8 h. In FeS/PS/KMnO 4 system, the degradation efficiency of PCB77 was directly proportional to the concentration of FeS, and greater amount of PCB77 was removed when more spiked soils were treated. Based on electron paramagnetic resonance (EPR) analysis and radical quenching experiments, •OH, SO 4 • - , 1 O 2 and O 2 • - were determined to play an important role in the oxidation of PCB77. Combined with identified intermediates and theoretical calculations, six main possible reaction pathways were proposed, including dechlorination , hydroxyl substitution, hydroxyl addition, sulfate substitution, sulfate addition, and C-C bridge bond cleavage. Acute toxicity and bioconcentration factors of intermediate products were predicted by T.E.S.T software, and the results showed that the ecotoxicity of PCB77 in soil was effectively reduced during the FeS/PS/KMnO 4 treatment process. This work demonstrated that FeS/PS/KMnO 4 system is applicable to treat PCB77 contaminated soil and has a great potential for soil remediation .
研究领域:
环境科学
·
化学
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产品关联
DOI
高影响因子
Geoscience Frontiers
·
2025
·
IF 8.9
Fang Chen,Zhen Li,Zeliang Su,Hongping Liao,Dandan Gao,Linyong Zhi,Chunmiao Kong,Qingzhi Zheng,Jun Wang
Polystyrene nanoplastics (PS-NPs) and 3,3′,4,4′-tetrachlorobiphenyl (PCB77) are common pollutants in freshwater aquatic environments. To investigate the separate and combined toxicity of these two pollutants on the freshwater blunt snout bream ( Megalobrama amblycephala ), 270 juveniles were randomly assigned to six exposure treatments: the control group, CT (free of PS-NPs and PCB77) , three single exposure groups, PS-L (0.2 mg/L PS-NPs), PS-H (2 mg/L PS-NPs), PCB (0.01 mg/L PCB77), and two combined exposure groups, PP-L (0.2 mg/L PS-NPs + 0.01 mg/L PCB77) and PP-H (2 mg/L PS-NPs + 0.01 mg/L PCB77). After a seven-day exposure, the tissue histopathology, antioxidant capacity, inflammatory response, and gut microbiome composition of fish were analyzed. The results showed that tissue fluorescence intensity of PS-NPs increases as the exposure levels of PS-NPs increase, and the combined exposure groups exhibited higher fluorescence intensity compared to their single PS-NPs exposure groups. Histopathological analysis showed that the exposure groups exhibited varying degrees of damage to the intestinal tissue compared to the control group, with more severe damage observed in the combined exposure groups. Additionally, liver damage was evident in the PS-H, PP-L and PP-H groups. Furthermore, the highest catalase (CAT) activities and malondialdehyde (MDA) contents were found in the intestine and liver of fish in the PP-L and PP-H groups. The mRNA levels of inflammatory factors ( il , il-1β , il-8 , il-6 , il-10 , and tnf-α ) were up-regulated in the PS-H, PP-L and PP-H groups compared to those of the CT group. In addition, remarkable alternations in the intestinal microbiome compositions were observed among the groups: the abundance of Verrucomicrobiome and Planctomycetota increased in all exposed groups compared to that of the control group, while the abundance of Actinobacteriota was significantly reduced in the exposure groups. Functional prediction of microbiota indicated that the amino acid and carbohydrate metabolism, as well as intestinal structure, were impaired in the PS-NPs and PCB77 exposure groups. The results suggested that the toxicity of PS-NPs on M. amblycephala including tissue injury, oxidative stress, and disturbance of intestinal microbiota, depends not only on concentration but also increases when co-exposed to PCB77. This finding raises concerns about the ecological safety in freshwater aquatic environments.
研究领域:
环境科学
·
毒理学
·
水产养殖学
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Lining Su,Guizhen Wang,Linlin Zhao,Yuan Deng,Yujing Guo,Yong Xiao,Huanwen Wang,Chuan Dong,Lifang Fan
Due to the urgent need for detecting trace amounts of 3,3′,4,4′-tetrachlorobiphenyl (PCB77) in the environment, we have developed an efficient and visible-driven photoelectrochemical (PEC) sensing platform based on carbon quantum dots (CQDs) modified titanium dioxide nanorods (TiO 2 NRs), coupling with exonuclease I (Exo I) assisted in target recycling for significant signal amplification. CQDs/TiO 2 NRs with high visible-light absorption ability and electron-hole separation efficiency is used as photoactive substrate for anchoring anti-PCB77 aptamer and its complementary DNA (cDNA). With the addition of PCB77, the specific interaction between PCB77 and its aptamer forces aptamer to separate from the electrode surface, resulting in an increase in photocurrent density. Adding Exo I in the test system, a self-catalytic target cycle was motivated, which significantly increased the PEC signal by more than twice, achieving signal amplification. The relationship between the photocurrent density changes and the concentrations of PCB77 are utilized to achieve quantitative detection of PCB77. The designed PEC sensing platform has good analytical performance with a detection limit as low as 0.33 pg L −1 , high selectivity and stability. Moreover, the PEC sensor is successfully used to evaluate the content of PBC77 in the environment samples. The established sensing platform provides a simple and efficient method for detecting trace amounts of PCB77 in the environment.
研究领域:
环境科学
·
分析化学
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光电化学
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Chunmiao Kong,Ting Pan,Xikun Chen,Muhammad Junaid,Hongping Liao,Dandan Gao,Qiuping Wang,Wanjing Liu,Xu Wang,Jun Wang
The toxic effects of organic pollutants and nanoplastics on fish have been extensively studied, but there is limited research available on their combined toxicity to bivalves. This research aimed to investigate the accumulation and ecotoxicological impacts such as antioxidant capacity, histopathology and intestinal microbiota in white hard clam Meretrix lyrata , resulting from 7 days of single and mixture exposure to 3,3′,4,4′-tetrachlorobiphenyl (PCB77, 0.1 mg/L) and polystyrene nanoplastics (PS-NPs, 80 nm, 1 mg/L). Our findings revealed that PS-NPs accumulated in various tissues such as the intestine, gill, mantle, foot, and siphon. And when compared to the PCB-PSNPs (PP) co-exposure group, the intestinal fluorescence intensity mediated by plastic particles in the PS-NPs (PS group) was significantly higher. The gill, digestive gland, and intestine were all damaged to varying extent by single exposure to PS-NPs or PCB77, according to histopathological analysis, which was aggravated by PP group. Moreover, the co-exposure induced a higher level of oxidative stress , which reflected by increase of activities of superoxide dismutase, catalase , glutamate oxaloacetate transaminase and glutamic-pyruvic transaminase and malondialdehyde content. In addition, the intestine microbial composition was dramatically altered by the combined exposure, reducing the abundance of probiotics such as Firmicutes, thereby posing a great threat to the health and metabolism of M. lyrata . In conclusion, our findings showed that PS-NPs and PCB77 co-exposure induced a higher toxicity to M. lyrata , including histopathological changes, altered antioxidant capacity and intestinal microbiota disruption. This study provides novel insights into PCB77 and PS-NPs' combined toxicity to marine organisms and its underlying molecular mechanisms of ecotoxicological effects.
研究领域:
环境科学
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海洋生物学
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生态毒理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 7
·3831-3842
·
IF 2.047
Zhang Baozhong,He Jintao,Tian Panpan,Lv Lina,Zhu Huina,Xie Lingling,Liu Xiaolong,He Baoshan
In this study, based on the specific binding of nucleic acid aptamers (Apts) to 3,3′,4,4′-tetrachlorobiphenyl (PCB77), an ultrasensitive electrochemical aptasensor was constructed for the detection of PCB77. The Apts were captured by hairpin (HP) deoxyribonucleic acid capture probes through complementary base pairing. The large surface area of reduced graphene oxide (rGO) combined with Ag-Cu 2 O significantly improved the efficiency of electron transfer on the electrode surface and provided a large number of binding sites for HP capture probes. Streptavidin (SA)-modified CeO 2 /AuPt was used as signal-generating material to amplify electrical signals cooperatively with Ag-Cu 2 O/rGO, and it was also combined with biotin-modified nucleic acid Apts via the SA-biotin system to form signal labels, which significantly improved the sensitivity of the aptasensor. The morphology and size of the synthesized materials were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The internal structure and composition of the materials were further analyzed by x-ray photoelectron spectroscopy (XPS), x-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy. The sensor assembly process was confirmed by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). Differential pulse voltammetry (DPV) was used to optimize the experimental conditions and evaluate the performance of the sensor. Under optimal conditions, the detection limit of the aptasensor was 0.069 ng/L, and the dynamic range was 0.1–10 3 ng/L, providing a high-quality platform for PCB77 detection. Graphical Abstract
研究领域:
分析化学
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环境科学
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纳米技术
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电化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Wei Guo,Yao Qin,Cheng Liu,Binbin Guo,Junhua Zou,Zenghong Xie,Ling Wu
This work reports the rapid and effective photocatalytic dechlorination of 3,3′,4,4′-trtrachlorobiphenyl (PCB77) with highly dispersed Pd nanoclusters loaded two-dimensional (2D) TiO 2 (B) nanosheets (Pd/TiO 2 (B)) under visible light irradiation, achieving a dechlorination efficiency of 100 % with H 2 O used as an H-donor source. The ultra-thin TiO 2 (B) nanosheets provide a good platform for studying the dechlorination intermediates/pathways of PCB77 at the molecular level. It is proved that the dechlorination of PCB77 is a stepwise process, in which chlorines at the para positions are much more susceptible than those at the meta positions due to the activation of the C Cl bond in the presence of Pd nanoclusters. Furthermore, in-situ FTIR results of D 2 O absorption suggest that the TiO 2 (B) nanosheets with abundant surface defects greatly promote the activation of water molecules via the formation of surficial complexes by hydrogen bonds. Finally, a synergistic mechanism is proposed for photocatalytic dechlorination of PCB77 over Pd/TiO 2 (B). The study provides an efficient method for complete dechlorination of PCB77 and an in-depth understanding photocatalyzed dechlorination reaction mechanism at the molecular level, which may extend to other photocatalytic dehalogenation reactions of halogenated pollutants.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Ying Tang,Yanwen Liu,Jinmiao Wang,Juan Wang,Zhihong Liu
In vivo tracking of persistent organic pollutants (POPs) is of great significance for assessing their risks to the ecological environment and human health. However, existing in vivo POPs detection methods are limited by the lethal sampling of living organisms, complex sample preparation processes, or bulky testing equipment. Photoelectrochemical (PEC) sensing with the merits of high sensitivity and simple equipment is a fast-developed method for in vivo analysis. A major obstacle for in vivo PEC sensors is the separated implantation of multiple electrodes and a light source, which raises concerns like multielectrode biofouling and electroactive molecules interference in the complex environment, uncertain electrode implant distance, and multiple insertion operations. Here, a coaxially implanted photofuel microsensor was developed by hiding the optical fiber-based photoanode inside the glass capillary-based biocathode, and the model target PCB77 can be detected with an ultralow detection limit (2.8 fg/mL). This unique photoanode–biocathode–light source integrated structure ensures excellent selectivity, good antifouling ability and biocompatibility, high accuracy, and less implant mechanical damage. Combined with a handheld pH meter, our sensor achieved convenient and direct tracking of the bioaccumulation levels of PCB77 in freely swimming fish.
研究领域:
环境科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Cuizhong Zhang,Hongjie Liu,Wanting Nong,Jinyun Peng,Liwei Wang,Liya Zhou
A novel photoelectrochemical (PEC) aptasensor coupled with a Z‑scheme was developed to realize quantitative determination of 3,3′,4,4′-tetrachlorobiphenyl (PCB77) at a concentration of sub-picogram per liter. The PEC aptasensor was fabricated by immobilizing ZnSe/Ag 2 Se on indium-tin oxide (ITO) that could covalently bind sulfurized aptamer. Meanwhile, complementary DNA-functionalized CdTe units were used as the sensitizers, and these were immobilized on the aptamer to form Z‑scheme dual-photosystem (PS). The Z‑scheme PS based on both ZnSe/Ag 2 Se and CdTe would be provided with better photocatalytic activity than conventional heterojunctions , and improving the photo-to-current conversion efficiency without biased voltage. Following the process of hatching, PCB77 was captured via the aptamer on the PEC aptasensor, producing aptamer–PCB77 complexes with weak conductive performance. Using the photocurrent change as a response signal for the quantitative detection of PCB77, the detection limits of the proposed method were 0.05 pg L –1 and 0.22 ng L –1 for the linear ranges of 0.01–500 pg L –1 and 0.5–10 5 ng L –1 , respectively. Compared with other technologies, the PEC aptasensor is more flexible, sensitive, specific and rapid in the absence of biased voltage under visble light. The results presented herein can potentially help build a model for the detection of various polychlorinated biphenyls (PCBs) with stable chemical properties and insulation performances that can be used to study persistent organic pollutants (POPs) in marine organisms and in the analysis of environmental conditions.
研究领域:
环境科学
·
分析化学
·
海洋生物学
·
污染监测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shihao Zhang,Shuo Zhang,Zhen Liu,Keping Yan
In this study, 3,4,3′,4′-Tetrachlorobiphenyl (PCB77) contaminated soil was treated by ball milling. Experimental results have demonstrated that reagent-to-soil ratio, revolution speed, milling ball size, ball-to-soil ratio, soil moisture and initial concentration of PCB77 all influenced the degradation of PCB77. The removal efficiency of PCB77 could reach 79.6 % after 12 h of ball milling (ball-soil ratio 8:1, revolution speed 250 rpm, reagent-soil ratio 1:12). After ball milling, the size of soil particles decreased significantly, while the specific surface area and pore size increased. Based on the degradation byproducts determined by GC–MS, the possible degradation pathway of PCB77 by ball milling was inferred. Momentously, we attempted to combine ball mill and non-thermal plasma (NTP) to treat PCB77-contaminated soil. The contaminated soil pretreated by ball milling exhibited a higher removal efficiency of PCB77 in subsequent Dielectric barrier discharges (DBD) treatment compared to untreated soil. Quantitative detection of total organic carbon and inorganic chlorine in soil revealed that plasma technology exhibits superior capabilities in degradation mineralization and dechlorination of PCB77 compared to ball milling. The innovative technology not only efficiently enhances the removal efficiency of PCB77 but also eliminates the risk of secondary pollution introduced by reagents used in ball milling, thereby presenting a novel and effective strategy for soil remediation.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Qi-Yue Guo,Shu-Yue Ren,Jing-Yi Wang,Ye Li,Zi-Yi Yao,Hui Huang,Zhi-Xian Gao,Shi-Ping Yang
Based on superparamagnetic nanoparticles , a responsive polyacrylamide hydrogel self-assembled by nucleic acid hairpin hybridization chain reaction was designed, and a universal low field nuclear magnetic resonance sensing platform was successfully constructed. As the target was gradually added, the hydrogel coating on the surface of the magnetic nanoparticle was opened layer by layer through binding with the aptamer, which specifically bonded thereto, causing different degrees of exposure of the magnetic nanoparticle, resulting in changes of low field nuclear magnetic resonance signals. This method was originally applied to the rapid detection of adenosine triphosphate (ATP), and the versatility of the method was verified using polychlorinated biphenyl 77 (PCB77). This method had the advantage of being fast, convenient, and low cost, and it can be easily operated with high repeatability. This universal method can detect a variety of targets by replacing aptamers and may be useful in controlling food quality and for rapidly detecting cancer cells in vitro.
研究领域:
分析化学
·
纳米技术
·
生物医学工程
·
分子生物学
✓ 已验证
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）