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Elevated degradation of di-n-butyl phthalate by activating peroxymonosulfate over GO-CoFe_(2)O_(4)composites:Synergistic effects and mechanisms

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Chinese Chemical Letters 2023年第12期34卷 310-317页

作者： Qingliang Liu Hang Qie Zhiqiang Sun Yufei Zhen Liying Wu Ying Zhao Jun Ma State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology.Harbin 150090China

Rational design of heterogeneous catalysts with high activity and stability is crucial in peroxymonosulfate(PMS)-based oxidation treatment of ***,the graphite oxide-cobalt ferrite(GOCoFe_(2)O_(4))composite was constructed,and its morphological,component and structural characteristics were thoroughly examined,***-CoFe_(2)O_(4)obviously boosted PMS catalytic performance on di-n-butyl phthalate removal(DBP,RpBp=90%,Roc=37%),which indicated by the first-order kinetic constant(kpBp=0.060 min^(-1))being roughly 4 times than pure CoFe_(2)O_(4)(kpBp=0.015 min-1).The fabrication of GO-CoFe_(2)O_(4)brought the favorable stability and repeatability up to six ***,the method of batch dosing catalyst was creatively proposed to improve the PMS utilization *** coupling of GO enhanced the dispersion of CoFe_(2)O_(4)particles to obtain sufficient active sites,additionally,the plentiful C=O groups and free-flowing electrons on GO promoted GO-CoFe_(2)O_(4)to coordinate a redox process during PMS *** the aid of theoretical calculations,GO-CoFe_(2)O_(4)was revealed to exhibit a strong affinity toward PMS adsorption,where PMS spontaneously dissociated into sulfate radical(SO_(4)^(·-)),hydroxyl radical(^(·)OH)and singlet oxygen(^(1)O_(2)),acting as the reactive oxygen species(ROSs).Electrons cycling between Co,Fe and O species ensured continuous ROSs generation and excellent catalytic performance.

关键词： Peroxymonosulfate Cobalt ferrite Graphene oxide Synergistic effect di-n-butyl phthalate

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Biodegradation Characteristics of Environmental Endocrine disruptor di-n-butyl phthalate

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Biomedical and Environmental Sciences 2005年第3期18卷 187-191页

作者： LInWAnG QI-FAnGLUO InstituteofEnvironmentalMedicine TongjiMedicalCollegeHuazhongUniversi~ofScienceandTechnologyWuhan430030HubeiChina CorrespondenceshouldbeaddressedtoQi-FangLUO InstituteofEnvironmentalMedicine13HangkongRoadWuhan430030HubeiChina

Objective The biodegradation characteristics of di-n-butyl phthalate (DBP), an environmental endocrine disruptor, were studied by the method of dominant bacteria and immobilized microorganisms. Methods Taking DBP as the only carbon source to acclimatize the collected activated sludge, the concentration of DBP increased progressively in the process of acclimatization. Plate streaking was used to separate 1 strain of the degradation dominant bacteria after acclimatization. Better conditions to degrade DBP by the bacterium could be obtained through orthogonal experiments and the bacterium was identified. Then the acclimated activated sludge was made to immobilize the microorganism using polyvinyl alcohol as entrapment agent. The immobilized microorganism degraded DBP at different conditions. Results The appropriate conditions to degrade DBP by the dominant bacteria were: degradation time, 32 h; DBP concentration, 200 mg/L; rate of shaking incubator, 100 r/min; pH, 7 and temperature, 30℃. DBP could be degraded by more than 95% under such conditions. The bacteria were identified as pseudomonas. The proliferated immobilized microorganisms degraded DBP more effectively and more adapted to temperature and pH than the free acclimated activated sludge. Conclusion One strain of DBP degradation dominant bacteria was separated from the acclimatized activated sludge. It could grow with DBP as the only carbon source and energy, and degraded DBP effectively. After having been immobilized and proliferated, the dominant bacteria could keep a higher biological activity and degrade DBP more effectively than activated sludge.

关键词： Environmental endocrine disruptor di-n-butyl phthalate Biodegradation Degradation dominant bacteria Immobilized microorganism

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Effects of di-n-butyl phthalate on male rat reproduction following pubertal exposure

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Asian Journal of Andrology 2011年第5期13卷 702-709页

作者： Ai-Mei Bao Xiao-Ming Man Xue-Jiang Guo Hui-Bin Dong Fu-Qiang Wang Hong Sun Yu-Bang Wang Zuo-Min Zhou Jia-Hao Sha State key Laboratory of Reproductive Medicine Nanjing Medical University Nanjing 210029 China Key Laboratory of Reproductive Medicine Institute of Toxicology Nanjing Medical University Nanjing 210029 China Jiangsu Provincial Center for disease Control and Prevention Nanjing 210009 China

di-n-butyl phthalate （DBP） is an endocrine-disrupting chemical that has the potential to affect male reproduction. However, the reproductive effects of low-dose DBP are still not well known, especially at the molecular level. In the present study, pubertal male Sprague-Dawley rats were orally administered DBP at a wide range of doses （0.1, 1.0, 10, 100 and 500 mg kg^-1 day^-1） for 30 days. The selected end points included reproductive organ weights, testicular histopathology and serum hormonal levels. Additionally, proteomic analysis was performed to identify proteins that are differentially expressed as a result of exposure to DBP at low doses （0.1, 1.0 and 10 mg kg^-1 day^-1）. Toxic effects were observed in the high-dose groups, including anomalous development of testes and epididymides, severe atrophy of seminiferous tubules, loss of spermatogenesis and abnormal levels of serum hormones. Treatment with low doses of DBP seemed to exert a ＇stimulative effect＇ on the serum hormones. Proteomics analysis of rat testes showed 20 differentially expressed proteins. Among these proteins, alterations in the expression of HnRnPA2/B1, vimentin and superoxide dismutase 1 （SOD1） were further confirmed by Western blot and immunohistochemistry. Taken together, we conclude that high doses of DBP led to testicular toxicity, and low doses of DBP led to changes in the expression of proteins involved in spermatogenesis as well as changes in the number and function of Sertoli and Leydig cells, although no obvious morphological changes appeared. The identification of these differentially expressed proteins provides important information about the mechanisms underlying the effects of DBP on male rat reproduction.

关键词： di-n-butyl phthalate hormones proteomics spermatogenesis testis

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Phytotoxicity in seven higher plant species exposed to di-n-butyl phthalate or bis （2-ethylhexyl） phthalate

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 259-268页

作者： Tingting MA Ying TEnG Peter CHRISTIE Yongming LUO Key Laboratory of Soil Environment and Pollution Remediation of Chinese Academy of Sciences Institute of Soil Science Nanjing 210008 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Agri-Environment Branch Agri-Food and Biosciences Institute Newforge Lane Belfast BT9 5PX United Kingdom Yantai Institute of Costal Zone Research Chinese Academy of Sciences Yantai 264003 China

We investigated phytotoxicity in seven plant species exposed to a range of concentrations （0- 500 mg· kg^-1 soil） of di-n-butyl phthalate （DnBP） or his （2- ethylhexyl） phthalate （DEHP）, two representative phthalate esters （PAEs） nominated by USEPA as priority pollutants and known environmental estrogens. We studied seed germination, root elongation, seedling growth, biomass （fresh weight, FW） and malondialdehyde （MDA） content of shoots and roots of wheat （Triticum aestivum L.）, alfalfa （Medicago sativa L.）, perennial ryegrass （Lolium perenne）, radish （Raphanus sativus L.）, cucumber （Cucumis sativus L.）, oat （Avena sativa） and onion （Allium cepa L.）, together with monitoring of plant pigment content （chlorophyll a, b and earotinoids） in alfalfa, radish and onion shoots. Root elongation, seedling growth and biomass of the test species were generally inhibited by DnBP but not by DEHP, indicating a lower level of phytotoxicity of DEHP than of DnBP. MDA contents of four species were promoted by PAE exposure, but not in alfalfa, ryegrass or onion shoots, indicating lower sensitivity of these three species to PAE pollutants. Plant pigment contents were clearly affected under the stress of both pollutants, implying the potential damage to the photosynthetic system of test plants, mainly by decreasing the content of chlorophyll a and b. Results of DnBP and DEHP phytotoxicity to the primary growth of test plants has provided information for the assessment of their environmental risk in the soil and also forms a basis for the further analysis of their toxic effects over the whole growth period of different plant species.

关键词： phytotoxicity di-n-butyl phthalate bis(2- ethylhexyl) phthalate malondialdehyde plant pigments(chlorophyll a b and carotinoids)

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Uptake and accumulation of di-n-butyl phthalate in six leafy vegetables under hydroponic conditions

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食物生产加工与营养(英文) 2019年第1期1卷 44-50页

作者： Yong Li Huang-qian Yan Xiang-yang Yu Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base Ministry of Science and Technology50 Zhongling StreetNanjing 210014China Institute of Food Safety and nutrition Jiangsu Academy of Agricultural Sciences50 Zhongling StreetNanjing 210014China

The uptake and accumulation of di-n-butyl phthalate(DBP)in six leafy vegetables was investigated under hydroponic *** test vegetables were six varieties of Brassica campestris ssp.,including Kangresijiqing(KRSJQ),Xiadiqing(XDQ),Ziyoucai(ZYC),Aijiaohuang(AJH),Shanghaiqing(SHQ)and Gaogengbai(GGB).The root concentration factor(RCF),translocation factor(TF)and transpiration stream concentration factor(TSCF)were calculated in order to compare the difference of uptake and accumulation behaviours of DBP in vegetable *** results showed that DBP was easily concentrated in vegetable roots,but was poorly translocated from the roots to the *** the six vegetables,the ability of concentrating DBP from the solution to shoots was the highest in GGB,followed by ZYC,KRSJQ,AJH,SHQ and *** concentrations of DBP(5.0 mg/L)seem to inhibit normal physiological activity in the vegetables,which resulted in a higher RCF and a lower TF and TSCF than in low-concentration *** results will help to evaluate the safety of agricultural products and to provide evidence for screening DBP pollution-safe vegetable cultivars.

关键词： di-n-butyl phthalate Root uptake Root concentration factor Translocation factor Transpiration stream concentration factor

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di-n-butyl phthalate(DBP) compromises human sperm functions by inhibiting sperm tyrosine phosphorylation

Di-n-butyl phthalate(DBP) compromises human sperm functions ...

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2018年浙江省男科学、泌尿外科学学术年会

作者：谢福晨陈学栋李朋丽水市人民医院

目的:In this study,we investigated the effects of DBP and MBP,on human sperm functions and elucidated the underlying mechanisms.方法:Human sperm were treated with DBP,MBP,and a mixture of DBP and MBP in ***-essential functions including vitality,motility,capacitation,and the acrosome reaction of human sperm were examined.结果:The results showed that DBP,MBP,and a mixture of DBP and MBP reduced total motility,progressive motility,and penetration ability dose-dependently.结论:In addition,these concentrations of phthalates suppressed tyrosine phosphorylation dose-dependently in human *** results indicated that DBP might compromise human sperm function by inhibiting sperm tyrosine phosphorylation.

关键词： DBP di-n-butyl phthalate compromises human sperm functions by inhibiting sperm tyrosine phosphorylation

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Effects of di-n-butyl phthalate and diethyl phthalate on Acetylcholinesterase Activity and neuro-related Gene Expression in Embryonic Zebrafish

Effects of Di-n-butyl Phthalate and Diethyl Phthalate on Ace...

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2013年水资源生态保护与水污染控制研讨会

作者： Hai Xu Xiaoling Shao Zhen Zhang Yanmin Zou Xiangyang Wu Liuqing Yang School of the Environment Jiangsu University School of Chemistry and Chemical Engineering Jiangsu University

In the present study, zebrafish embryos were used to assess the neurotoxicity of di-n-butyl phthalate(DBP), diethyl phthalate(DEP) and their mixture. Four-hour post-fertilization(hpf) zebrafish embryos were exposed to various concentrations of DBP, DEP and their mixture(DBP-DEP) until 96 hpf. The transcriptions levels of selected neuron-related genes reported as neurotoxicity biomarkers were analyzed. The results showed that transcripts of growth associated protein 43(gap43), embryonic lethal abnormal vision –like 3(elavl3), glial fibrillary acidic protein(gfap), myelin basic protein(mbp), α1-tubulin and neurogenin1(ngn1)were significantly up-regulated after DBP, DEP and DBP-DEP mixture exposure. In addition,acetylcholinesterase(ACh E) activity was significantly inhibited in the embryos. These results indicate that DBP and DEP have the potential neurotoxicity in zebrafish embryos.

关键词： di-n-butyl phthalate diethyl phthalate Developmental neurotoxicity nervous system Zebrafish

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