The wastewater discharge from the process of chrome plating,which contains 6:2 chlorinated polyfluorinated ether sulfonate(F-53B)and chromium(Cr),may be toxic to biofilm.In this study we found that the biofilm formed ...The wastewater discharge from the process of chrome plating,which contains 6:2 chlorinated polyfluorinated ether sulfonate(F-53B)and chromium(Cr),may be toxic to biofilm.In this study we found that the biofilm formed by Pseudomonas aeruginosa PAO1 was inhibited by exposure to a combination of F-53B and Cr(VI).The combined pollution damaged the cell membranes and the structure of the biofilm,and inhibited the production of the Pseudomonas quinolone-based signal,which affected biofilm formation.Moreover,the secretion of extracellular polymeric substances decreased as a result of this combined exposure.Exposure to F-53B and Cr(VI)individually or in combination could induce the excessive accumulation of intracellular reactive oxygen species(ROS),and the ROS positive rate of the bacteria increased under the treatment with 0.2 mmol/L of Cr(VI)and 250 nmol/L of F-53B,respectively.In addition,the activities of superoxide dismutase(SOD)and catalase(CAT)were enhanced for scavenging ROS in the bacteria that were exposed to Cr(VI)and F-53B.As an antioxidant,rutin was used to repair the toxicity of Cr(VI)and F-53B towards the biofilm formed by the bacteria.When rutin was added to the bacteria medium,with either Cr(VI)or F-53B as pollutant,or with the combined pollutants,the extracellular protein content of the bacteria recovered to 0.84,0.94,and 0.85 times that of the control,respectively.Meanwhile,the accumulation of ROS and the activities of SOD and CAT decreased,which indicated that the addition of rutin can alleviate the oxidative stress and promote the antioxidant stress system.展开更多
建立HPLC-MS/MS方法用于水介质中F-53B的含量检测。采用高效液相色谱-串联质谱法,试样用曝气生态水溶解,使用Agilent 1290-6470A LC/MS/MS测定,以20%水(0.1%甲酸)+80%乙腈为流动相,Eclipse plus C 18 RRHD柱,外标法定量。该分析方法的F-...建立HPLC-MS/MS方法用于水介质中F-53B的含量检测。采用高效液相色谱-串联质谱法,试样用曝气生态水溶解,使用Agilent 1290-6470A LC/MS/MS测定,以20%水(0.1%甲酸)+80%乙腈为流动相,Eclipse plus C 18 RRHD柱,外标法定量。该分析方法的F-53B相关系数为0.9998,变异系数为0.64%,平均回收率分别101.4%。该方法操作简单,准确度、精密度及灵敏度均满足要求,可用于F-53B于水中含量检测。为F-53B在水环境中的检测,提供了一种可靠的方案。展开更多
Chlorinated polyfluorinated ether sulfonate(F-53B),a chromium-fog depressant widely utilized as an alternative to perfluorooctanesulfonate,can transfer from mother to fetus.Recent research has demonstrated that prenat...Chlorinated polyfluorinated ether sulfonate(F-53B),a chromium-fog depressant widely utilized as an alternative to perfluorooctanesulfonate,can transfer from mother to fetus.Recent research has demonstrated that prenatal exposure to F-53B results in synaptic damage in weaning mice.However,the mechanism underpinning F-53B-triggered synaptic damage during fetal development remains unclear.This study aims to investigate the role of the protein kinase A(PKA)/cAMP response element-binding protein(CREB)pathway,a crucial signaling mechanism known as“synaptic switch”,in the early neurotoxicity of F-53B exposure both in vivo and in vitro.Here,C57BL/6 fetal mice were subjected to exposure to F-53B(0,4,and 40μg/L)from gestation days(GD)0 to 14 to evaluate nerve injury prior to delivery.HT22 neurons exposed to F-53B(0,0.016,0.08,0.4,2,and 10μmol/L)for 24 h were utilized to elucidate the underlying mechanism.Our results demonstrated that F-53B significantly increased the fluorescence intensity of Nestin(a neural stem cell marker)in the fetal brain hippocampus(GD14).Subsequently,we found that F-53B downregulated the expression of synaptic plasticity markers(SYP,GAP43,and BDNF)in the fetal brain and HT22 neurons.Further molecular docking analysis revealed that F-53B fits into the ligand-binding pockets of PKA and CREB1.Results showed that F-53B inhibited the translocation of PKA protein from the cytoplasm to the neuronal nuclei and reduced the levels of PKA,CREB1,p-PKA(α/β/γ)-Thr197,and p-CREB1-S133 in the nucleus.Furthermore,the expression of synaptic plasticity markers altered by F-53B could be reversed by a PKA agonist and was intensified by a PKA antagonist.In summary,our findings suggest that intrauterine exposure to F-53B can weaken the expression of synaptic plasticity markers in the fetal brain,with this neurotoxicity being mediated by the cytoplasmic retention of PKA.展开更多
Egg hatching of the soil collembolan Folsomia candida and the effects of per-and polyfluoroalkyl substances were investigated.New and effective laboratory methods for egg hatching studies with soil collembolans were e...Egg hatching of the soil collembolan Folsomia candida and the effects of per-and polyfluoroalkyl substances were investigated.New and effective laboratory methods for egg hatching studies with soil collembolans were established.Per-and polyfluoroalkyl compounds(PFASs)have been used industrially worldwide and are persistent organic pollutants in many soils.Twenty eggs laid by synchronized adults of the collembolan Folsomia candida were added to each Petri dish containing compressed soil substrate mixed with perfluorooctanoic acid(PFOA),heptafluorobutyric acid(PFBA),or 6:2 chlorinated polyfluoroalkyl ether sulfonic acid(F-53B),and after 25 d of exposure the number hatched declined on average by 6.9%−49.7%,10.3%−24.1%,and 3.4%−18.6%,respectively.PFASs delayed the peak of hatching by one day,and at different concentrations reduced the number of eggs hatched during the peak by 16.7%−30%and 23.3%−43.2%in PFOA and PFBA treatments,respectively.In the presence of F-53B the number of eggs hatched declined by 73.3%but the number of individuals increased by 29.3%at higher concentrations.The characteristics of egg hatching were stable and sensitive to PFASs,and may be suitable for use as indicators in the screening of contaminated soils for environmental risk assessment.展开更多
Per-and polyfluorinated alkyl substances(PFASs)have been used since the 1950s as chrome mist suppressant(CMS)in the electroplating industry.In this study,various samples within an electroplating factory,the related wa...Per-and polyfluorinated alkyl substances(PFASs)have been used since the 1950s as chrome mist suppressant(CMS)in the electroplating industry.In this study,various samples within an electroplating factory,the related wastewater treatment facilities and surrounding environment at Hangzhou Bay in Southeast China were investigated for the occurrence and removal of PFASs.PFOS and 6:2 Cl-PFAES are predominant compounds in the samples.The PFASs in the bath solution of the workshops had some differences from the final releases,partly because of the historic usage and memory effects.PFOS and 6:2 Cl-PFAES were found in high concentration(5500 and 154.5 mg/L in influent,795 and 985 mg/L in effluent)in the electroplating Wastewater Treatment Plant(WWTP).The ultrafiltration and reverse osmosis(RO)treatment had a significant removal efficiency(74%e100%).On the other hand the reduction,precipitation and anaerobic/anoxic/oxic(A2/O)treatment had poor removal efficiency for PFASs.The receiving river samples had levels of PFASs between 300 and 1500 ng/L,and the concentrations of PFOS and 6:2 Cl-PFAES decreased with increasing distance to the municipal WWTP outlet due to dilution.The concentrations of PFOA in the river water samples were also high but might originate from other sources.The relevant ecological risk is noteworthy,especially for PFOS and PFOA for which limits have been defined.There is an urgent need to control plating industries in China and worldwide.Currently a GEF project related to Stockholm Convention implementation has reduced and possibly eliminated PFOS use and release in the plating industry in China.In addition,it will be important to evaluate and control the alternatives used.展开更多
基金supported by the Natural Science Foundation of Jiangsu Province(No.BK20201388)the Industry Prospect and Common Key Technologies in Jiangsu Province(No.BE2018015)the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).
文摘The wastewater discharge from the process of chrome plating,which contains 6:2 chlorinated polyfluorinated ether sulfonate(F-53B)and chromium(Cr),may be toxic to biofilm.In this study we found that the biofilm formed by Pseudomonas aeruginosa PAO1 was inhibited by exposure to a combination of F-53B and Cr(VI).The combined pollution damaged the cell membranes and the structure of the biofilm,and inhibited the production of the Pseudomonas quinolone-based signal,which affected biofilm formation.Moreover,the secretion of extracellular polymeric substances decreased as a result of this combined exposure.Exposure to F-53B and Cr(VI)individually or in combination could induce the excessive accumulation of intracellular reactive oxygen species(ROS),and the ROS positive rate of the bacteria increased under the treatment with 0.2 mmol/L of Cr(VI)and 250 nmol/L of F-53B,respectively.In addition,the activities of superoxide dismutase(SOD)and catalase(CAT)were enhanced for scavenging ROS in the bacteria that were exposed to Cr(VI)and F-53B.As an antioxidant,rutin was used to repair the toxicity of Cr(VI)and F-53B towards the biofilm formed by the bacteria.When rutin was added to the bacteria medium,with either Cr(VI)or F-53B as pollutant,or with the combined pollutants,the extracellular protein content of the bacteria recovered to 0.84,0.94,and 0.85 times that of the control,respectively.Meanwhile,the accumulation of ROS and the activities of SOD and CAT decreased,which indicated that the addition of rutin can alleviate the oxidative stress and promote the antioxidant stress system.
文摘建立HPLC-MS/MS方法用于水介质中F-53B的含量检测。采用高效液相色谱-串联质谱法,试样用曝气生态水溶解,使用Agilent 1290-6470A LC/MS/MS测定,以20%水(0.1%甲酸)+80%乙腈为流动相,Eclipse plus C 18 RRHD柱,外标法定量。该分析方法的F-53B相关系数为0.9998,变异系数为0.64%,平均回收率分别101.4%。该方法操作简单,准确度、精密度及灵敏度均满足要求,可用于F-53B于水中含量检测。为F-53B在水环境中的检测,提供了一种可靠的方案。
基金supported by the National Science Foundation of China(No.82073503,82173471,82003409,82103823)the Natural Science Foundation of Guangdong Province(No.2021B1515020015,2021A1515012212)the Guangzhou Science and Technology Plan Project(No.2024A04J6476).
文摘Chlorinated polyfluorinated ether sulfonate(F-53B),a chromium-fog depressant widely utilized as an alternative to perfluorooctanesulfonate,can transfer from mother to fetus.Recent research has demonstrated that prenatal exposure to F-53B results in synaptic damage in weaning mice.However,the mechanism underpinning F-53B-triggered synaptic damage during fetal development remains unclear.This study aims to investigate the role of the protein kinase A(PKA)/cAMP response element-binding protein(CREB)pathway,a crucial signaling mechanism known as“synaptic switch”,in the early neurotoxicity of F-53B exposure both in vivo and in vitro.Here,C57BL/6 fetal mice were subjected to exposure to F-53B(0,4,and 40μg/L)from gestation days(GD)0 to 14 to evaluate nerve injury prior to delivery.HT22 neurons exposed to F-53B(0,0.016,0.08,0.4,2,and 10μmol/L)for 24 h were utilized to elucidate the underlying mechanism.Our results demonstrated that F-53B significantly increased the fluorescence intensity of Nestin(a neural stem cell marker)in the fetal brain hippocampus(GD14).Subsequently,we found that F-53B downregulated the expression of synaptic plasticity markers(SYP,GAP43,and BDNF)in the fetal brain and HT22 neurons.Further molecular docking analysis revealed that F-53B fits into the ligand-binding pockets of PKA and CREB1.Results showed that F-53B inhibited the translocation of PKA protein from the cytoplasm to the neuronal nuclei and reduced the levels of PKA,CREB1,p-PKA(α/β/γ)-Thr197,and p-CREB1-S133 in the nucleus.Furthermore,the expression of synaptic plasticity markers altered by F-53B could be reversed by a PKA agonist and was intensified by a PKA antagonist.In summary,our findings suggest that intrauterine exposure to F-53B can weaken the expression of synaptic plasticity markers in the fetal brain,with this neurotoxicity being mediated by the cytoplasmic retention of PKA.
基金funded by the National Natural Science Foundation of China(Grant Nos.41977136 and 41991334).
文摘Egg hatching of the soil collembolan Folsomia candida and the effects of per-and polyfluoroalkyl substances were investigated.New and effective laboratory methods for egg hatching studies with soil collembolans were established.Per-and polyfluoroalkyl compounds(PFASs)have been used industrially worldwide and are persistent organic pollutants in many soils.Twenty eggs laid by synchronized adults of the collembolan Folsomia candida were added to each Petri dish containing compressed soil substrate mixed with perfluorooctanoic acid(PFOA),heptafluorobutyric acid(PFBA),or 6:2 chlorinated polyfluoroalkyl ether sulfonic acid(F-53B),and after 25 d of exposure the number hatched declined on average by 6.9%−49.7%,10.3%−24.1%,and 3.4%−18.6%,respectively.PFASs delayed the peak of hatching by one day,and at different concentrations reduced the number of eggs hatched during the peak by 16.7%−30%and 23.3%−43.2%in PFOA and PFBA treatments,respectively.In the presence of F-53B the number of eggs hatched declined by 73.3%but the number of individuals increased by 29.3%at higher concentrations.The characteristics of egg hatching were stable and sensitive to PFASs,and may be suitable for use as indicators in the screening of contaminated soils for environmental risk assessment.
基金the Major Science and Technology Program for Water Pollution Control and Treatment in China(Grant Nos.2017ZX07202001 and 2017ZX07202004).
文摘Per-and polyfluorinated alkyl substances(PFASs)have been used since the 1950s as chrome mist suppressant(CMS)in the electroplating industry.In this study,various samples within an electroplating factory,the related wastewater treatment facilities and surrounding environment at Hangzhou Bay in Southeast China were investigated for the occurrence and removal of PFASs.PFOS and 6:2 Cl-PFAES are predominant compounds in the samples.The PFASs in the bath solution of the workshops had some differences from the final releases,partly because of the historic usage and memory effects.PFOS and 6:2 Cl-PFAES were found in high concentration(5500 and 154.5 mg/L in influent,795 and 985 mg/L in effluent)in the electroplating Wastewater Treatment Plant(WWTP).The ultrafiltration and reverse osmosis(RO)treatment had a significant removal efficiency(74%e100%).On the other hand the reduction,precipitation and anaerobic/anoxic/oxic(A2/O)treatment had poor removal efficiency for PFASs.The receiving river samples had levels of PFASs between 300 and 1500 ng/L,and the concentrations of PFOS and 6:2 Cl-PFAES decreased with increasing distance to the municipal WWTP outlet due to dilution.The concentrations of PFOA in the river water samples were also high but might originate from other sources.The relevant ecological risk is noteworthy,especially for PFOS and PFOA for which limits have been defined.There is an urgent need to control plating industries in China and worldwide.Currently a GEF project related to Stockholm Convention implementation has reduced and possibly eliminated PFOS use and release in the plating industry in China.In addition,it will be important to evaluate and control the alternatives used.
