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Degradation of indomethacin in river water under stress and non-stress laboratory conditions:degradation products,long-term evolution and adsorption to sediment

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journal of Environmental Sciences 2017年第1期29卷 13-20页

作者： juan j.j.menez maria I.Sanchez Rafael Pardo Beatriz E.Munoz Department of Analytical Chemistry Faculty of SciencesCampus Miguel DelibesUniversity of ValladolidPaseo de Belen 747012 ValladolidSpain I.U.CINQUIMA Campus Miguel DelibesUniversity of ValladolidPaseo de Belen 547011 ValladolidSpain Department of Analytical Chemistry School of Industrial EngineersUniversity of ValladoliclFrancisco Mendizdbal 147014 ValladolidSpain

The pharmaceutical compound indomethacin is not totally removed in wastewater treatment plants,whose effluents flow into aquatic environments;concentrations in the 0.1-100 ng/L range are commonly found in surface waters,and its fate is unknown.Here,biological,photochemical and thermal degradation assays were conducted under stress and non-stress conditions to estimate its degradation rate in river water and establish its degradation products over time.The results revealed that direct sunlight irradiation promoted the complete degradation of indomethacin（2 μg/L） in less than 6 hr,but indomethacin was detected over a period of 4 months when water was kept under the natural day-night cycle and the exposure to sunlight was partially limited,as occurs inside a body of water.The biological degradation in water was negligible,while the hydrolysis at pH 7.8 was slow.Residues were monitored by ultra-pressure liquid chromatography/quadrupole time-of-flight/mass spectrometry after solid-phase extraction,and six degradation products were found;their structures were proposed based on the molecular formulae and fragmentation observed in high-resolution tandem mass spectra.4-Chlorobenzoic and 2-acetamido-5-methoxybenzoic acids were the long-term transformation products,persisting for at least 30 weeks in water kept under non-stress conditions.Furthermore,the degradation in the presence of sediment was also monitored over time,with some differences being noted.The adsorption coefficients of indomethacin and degradation products on river sediment were calculated;long-term degradation products did not have significant adsorption to sediment.

关键词： Indomethacin Degradation products River water Adsorption coefficients High-resolution mass spectrometry

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Report of the first international workshop on onchocerciasis-associated epilepsy

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Infectious Diseases of Poverty 2018年第1期7卷 238-242页

作者： Robert Colebunders Michel Mandro Alfred K.Njamnshi Michel Boussinesq An Hotterbeekx joseph Kamgno Sarah O’Neill Adrian Hopkins Patrick Suykerbuyk maria-Gloria Basanez Rory j.Post belen Pedrique Pierre-Marie Preux Wilma A.Stolk Thomas B.Nutman Richard Idro Global Health Institute University of AntwerpAntwerpBelgium Provincial Health Division of Ituri BuniaDemocratic Republic of the Congo Department of Neurology Yaounde Central Hospital/University of Yaounde 1Brain Research Africa Initiative(BRAIN)YaoundeCameroon Institut de Recherche pour le Developpement(IRD) MontpellierFrance Centre for Research on Filariasis and other Tropical Diseases(CRFilMT) and Faculty of Medicine and Biomedical SciencesUniversity of Yaounde 1YaoundeCameroon Department of Public Health Institute of Tropical MedicineAntwerpBelgium Neglected and Disabling Diseases of Poverty Consultant KentUK London Centre for Neglected Tropical Disease Research Imperial College LondonLondonUK London School of Hygiene&Tropical Medicine and Liverpool john Moores University LondonUK Drugs for Neglected Diseases initiative GenevaSwitzerland Preux Pierre-Marie INSERMUniversity LimogesCHU LimogesUMR_S 1094Tropical NeuroepidemiologyInstitute of Neuroepidemiology and Tropical NeurologyCNRS FR 3503 GEIST87000 LimogesFrance Department of Public Health Erasmus MCUniversity Medical Centre RotterdamRotterdamThe Netherlands Laboratory of Parasitic Diseases National Institutes of HealthBethesdaMarylandUSA Makerere University College of Health SciencesKampalaUganda

Background:Recently,several epidemiological studies performed in Onchocerca volvulus-endemic regions have suggested that onchocerciasis-associated epilepsy(OAE)may constitute an important but neglected public health problem in many countries where onchocerciasis is still endemic.Main text:On October 12-14th 2017,the first international workshop on onchocerciasis-associated epilepsy(OAE)was held in Antwerp,Belgium.The workshop was attended by 79 participants from 20 different countries.Recent research findings strongly suggest that O.volvulus is an important contributor to epilepsy,particularly in meso-and hyperendemic areas for onchocerciasis.Infection with O.volvulus is associated with a spectrum of epileptic seizures,mainly generalised tonic-clonic seizures but also atonic neck seizures(nodding),and stunted growth.OAE is characterised by an onset of seizures between the ages of 3-18 years.Multidisciplinary working groups discussed topics such as how to 1)strengthen the evidence for an association between onchocerciasis and epilepsy,2)determine the burden of disease caused by OAE,3)prevent OAE,4)improve the treatment/care for persons with OAE and affected families,5)identify the pathophysiological mechanism of OAE,and 6)deal with misconceptions,stigma,discrimination and gender violence associated with OAE.An OAE Alliance was created to increase awareness about OAE and its public health importance,stimulate research and disseminate research findings,and create partnerships between OAE researchers,communities,advocacy groups,ministries of health,non-governmental organisations,the pharmaceutical industry and funding organizations.Conclusions:Although the exact pathophysiological mechanism underlying OAE remains unknown,there is increasing evidence that by controlling and eliminating onchocerciasis,OAE will also disappear.Therefore,OAE constitutes an additional argument for strengthening onchocerciasis elimination efforts.Given the high numbers of people with epilepsy in O.volvulus-endemic regions,more advocacy is u

关键词： Onchocerciasis Epilepsy Nodding syndrome Nakalanga syndrome Prevalence Burden of disease Africa

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