Acta Hydrochimica Et Hydrobiologica最新文献

{"title":"Relevance of intra- and extracellular cyanotoxins for drinking water treatment","authors":"J. Pietsch, K. Bornmann, W. Schmidt","doi":"10.1002/1521-401X(200207)30:1<7::AID-AHEH7>3.0.CO;2-W","DOIUrl":"https://doi.org/10.1002/1521-401X(200207)30:1<7::AID-AHEH7>3.0.CO;2-W","url":null,"abstract":"Bloom-forming cyanobacteria have been observed in eutrophic waterbodies including drinking water reservoirs all over the world. In this connection investigations about the relevance of intra- and extracellular cyanotoxins for drinking water treatment were carried out in laboratory- and pilot-scale experiments. An algae growth phase depended toxin release from cyanobacteria was obtained naturally caused from cultured cyanobacteria (Microcystis aeruginosa) and in a eutrophic reservoir containing Planktothrix rubescens. Results from laboratory-scale tests using cultivated cyanobacteria and pilot-scale experiments at a eutrophic reservoir underline the induced toxin release during conventional water treatment. Additional to the known toxin release using pre-oxidation, it was obtained the first time that the application of flocculation/filtration also effects in toxin release under the conditions investigated, possibly caused by turbulences in pipes and pressure gradients in filters. \u0000 \u0000 \u0000 \u0000Bedeutung intra- und extrazellularer Cyanotoxine fur die Trinkwasseraufbereitung \u0000 \u0000 \u0000 \u0000Die Beeintrachtigung der Trinkwasserqualitat infolge oftmals uberraschender Algenmassenentwicklungen stellt die Wasserwerke in vielen Landern der Welt vor erhebliche Probleme. In diesem Zusammenhang wurde das Verhalten intra- und extrazellularer Cyanotoxine im Prozess der Wasseraufbereitung anhand von Laborversuchen und an einer kleintechnischen Versuchsanlage untersucht. Die naturliche Freisetzung der Cyanotoxine wurde, abhangig vom Wachstumsstadium der Cyanobakterien, sowohl an einer Microcystis aeruginosa-Kultur als auch an einer mit Planktothrix rubescens belasteten eutrophen Talsperre nachgewiesen. Im Ergebnis von Labor- und kleintechnischen Versuchen an kultivierten bzw. naturlich vorkommenden Cyanobakterien wurde festgestellt, dass im Prozess der konventionellen Aufbereitung eine induzierte Toxinfreisetzung stattfindet. Neben der bereits bekannten Freisetzung bei der Voroxidation konnte erstmals auch die Freisetzung von Cyanotoxinen im Prozess der Flockung/Filtration, wahrscheinlich hervorgerufen durch Turbulenzen im Leitungssystem und Druckgradienten in Filtern, nachgewiesen werden.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"99 1","pages":"7-15"},"PeriodicalIF":0.0,"publicationDate":"2002-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80995241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of Drinking Water from Highly Contaminated Surface Waters: Removal of Organic, Inorganic, and Microbial Contaminants Applying Mobile Membrane Filtration Units","authors":"T. Heberer, D. Feldmann, K. Reddersen, H. Altmann, T. Zimmermann","doi":"10.1002/1521-401X(200207)30:1<24::AID-AHEH24>3.0.CO;2-O","DOIUrl":"https://doi.org/10.1002/1521-401X(200207)30:1<24::AID-AHEH24>3.0.CO;2-O","url":null,"abstract":"In military out of area missions of the Bundeswehr, it can be necessary to produce drinking water even from highly polluted surface waters containing a variety of organic, inorganic, and microbiological contaminants. Thus, mobile drinking water purification systems must be able to remove such contaminants as far as possible to meet the requirements of the German and European drinking water regulation/directive. Presently, two novel drinking water purification units applying membrane filtration undergo intensive long-term trials carried out by the Bundeswehr. If these trials positively proof the functionality of these units and their ability to remove all possible contaminants they shall substitute so far available devices which use large amounts of chemicals and charcoal filtration for water purification.In the course of a research project, the functionality of the new devices and their efficacy to remove high amounts of algae, microbes, and organic and inorganic pollutants are additionally tested in “worst-case” field studies. In September 2000, the first mobile drinking water purification unit was tested at the Teltowkanal in Berlin, Germany.This canal was chosen because it carries high burdens of municipal sewage effluents. The results from the fatigue test confirmed the ability of the water purification unit to reduce the concentrations of all contaminants meeting the maximum tolerance levels set by the German/European drinking water regulation.The pre-filtration device was very effective in removing algae and solid particles to protect the membranes from clogging and to enable an almost maintenance-free operation. Residues of pharmaceuticals and some other organic contaminants have almost totally been removed from the surface water where they were detected at individual concentrations up to the μg/L-level. \u0000 \u0000 \u0000 \u0000Gewinnung von Trinkwasser aus hochbelasteten Oberflachengewassern: Entfernung organischer, anorganischer und mikrobieller Kontaminanten mittels mobiler Membranfiltrationsanlagen \u0000 \u0000 \u0000 \u0000Im Rahmen militarischer Auslandseinsatze der Bundeswehr kann es notwendig sein, Trinkwasser auch aus hochkontaminierten Oberflachengewassern zu gewinnen, die eine Vielzahl verschiedener organischer, anorganischer und mikrobiologischer Verunreinigungen enthalten. Mobile Trinkwasseraufbereitungsanlagen mussen deshalb in der Lage sein, auch solche Kontaminanten soweit wie moglich zu entfernen, um die Anforderungen der deutschen bzw. europaischen Trinkwasserverordnung/-richtlinie zu erfullen. Derzeit werden mehrere neuartige, auf der Membranfiltrationstechnik basierende Trinkwasseraufbereitungsanlagen im Rahmen extensiver Langzeittests bei der Bundeswehr untersucht. Sollten diese Tests im Hinblick auf die Funktionalitat der Anlage und ihrer Fahigkeit zur Entfernung aller relevanten Kontaminanten positiv verlaufen, so sollen diese die bislang verfugbaren Anlagen ersetzen, die grose Mengen an Chemikalien und Aktivkohle verbrauchen. Im Rahmen eines Forschung","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"17 1","pages":"24-33"},"PeriodicalIF":0.0,"publicationDate":"2002-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75746279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competition Between Littoral Cladocerans Macrothrix triserialis and Alona rectangula (Cladocera) in Relation to Algal Food Level and Inoculation Density","authors":"S. Nandini, Gloria Muro-Cruz, S. S. S. Sarma","doi":"10.1002/1521-401X(200207)30:1<16::AID-AHEH16>3.0.CO;2-E","DOIUrl":"https://doi.org/10.1002/1521-401X(200207)30:1<16::AID-AHEH16>3.0.CO;2-E","url":null,"abstract":"We studied the relative competitive abilities of littoral cladocerans M.triserialis and A. rectangula using green algal food at two levels (0.5 · 106 and 2 · 106 cells mL−1 of Chlorella) under five different inoculation ratios. Both the cladoceran species were influenced by food availability and mutual competitive pressure. Macrothrix could withstand competition better under conditions of lower food availability while Alona grew better, despite competition, when more Chlorella was available. Population growth rates (r) ranged from 0.022…0.070 for Alona and from 0.024…0.075 for Macrothrix. There was a significant impact of the inoculation ratio on the maximal population density reached by either test species. Food concentration had a significant influence on the peak population density reached only for Alona rectangula. Data on the body sizes of M. triserialis and A. rectangula showed that there was a higher somatic growth with increasing food availability and decreased competitive pressure in both the test species. In Macrothrix, food concentration and the competition from Alona through different initial inoculation densities had a significant impact on the body size. At the lower food concentration, the body size was significantly smaller when the inoculation density was lowest (highest competitive pressure). The body size of Alona, on the other hand, was not affected by the competition but was significantly higher under conditions of greater food availability. These results have been discussed in light of different theories of competition. \u0000 \u0000 \u0000 \u0000Konkurrenz zwischen den litoralen Cladoceren Macrothrix triserialis und Alona rectangula (Cladocera) in Bezug zur Nahrungsdichte der Algen und zur Inokulationsdichte \u0000 \u0000 \u0000 \u0000Untersucht wird die relative Konkurrenzfahigkeit der litoralen Cladoceren M. triserialis und A. rectangula bei zwei Algendichten von Chlorella als Nahrungsquelle (0.5 · 106 und 2 · 106 Zellen mL−1) und funf verschiedenen Inokulationsdichten. Beide Cladoceren-Arten werden beeinflusst durch die Verfugbarkeit der Nahrung und den wechselseitigen Konkurrenzdruck. Macrothrix widersteht der Konkurrenz besser unter den Bedingungen geringeren Nahrungsangebotes, wahrend Alona trotz Konkurrenz besser wachst, wenn mehr Chlorella verfugbar ist. Die Wachstumsraten der Population (r) betragen 0.022…0.070 fur Alona und 0.024…0.075 fur Macrothrix. Fur jede der untersuchten Arten ergab sich ein signifikanter Einfluss der Inokulationsrate auf die erreichte maximale Populationsdichte. Die Nahrungskonzentration hatte nur fur Alona rectangula einen signifikanten Einfluss auf die erreichte maximale Populationsdichte. Daten zur Korpergrose von M. triserialis und A. rectangula zeigen ein hoheres somatisches Wachstum beider Arten bei zunehmender Nahrungsdichte und abnehmendem Konkurrenzdruck. Fur Macrothrix haben die Nahrungskonzentration und die Konkurrenz durch Alona bei unterschiedlicher initialer Inokulationsdichte signifikanten Einfluss auf die Korpergr","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"76 1","pages":"16-23"},"PeriodicalIF":0.0,"publicationDate":"2002-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86683011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Primary Production by Statistical Analysis of Water‐quality Data","authors":"W. Petersen, U. Callies","doi":"10.1002/1521-401X(200207)30:1<34::AID-AHEH34>3.0.CO;2-M","DOIUrl":"https://doi.org/10.1002/1521-401X(200207)30:1<34::AID-AHEH34>3.0.CO;2-M","url":null,"abstract":"Time series of weekly water-quality data at Schnackenburg on the Elbe River (1985-2000) were subjected to principal component analysis (PCA). Considering the amplitudes of composite patterns of variables is a step towards a process-oriented interpretation of water-quality data. One specific objective was to investigate the impact of improved water quality after the German reunification in 1990 on primary production and the oxygen budget. To discriminate anthropogenic signals from natural fluctuations a separation of the impact of discharge was attempted based on a linear regression approach. A dominant pattern of co-variation in the residual data could be attributed to biological activity (primary production). The most relevant variables of this 'biomode' are oxygen saturation, pH, and orthophosphate. We conclude that multivariate statistical analysis of water-quality data can help to estimate primary production when direct observations of algal concentrations are missing. In the years from 1998-2000 the trend of the 'biomode' indicates an increased load of oxygen consuming biomass caused by enhanced primary production in the middle stretches of the Elbe River which corresponds with the observation of more severe oxygen deficits in the tidal section of the river.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"27 1","pages":"34-40"},"PeriodicalIF":0.0,"publicationDate":"2002-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76733094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impaired Functions in Nile Tilapia, Oreochromis niloticus (Linnaeus, 1757), from Polluted Waters","authors":"K. Adham, S. S. Hamed, Hania M. Ibrahim, R. Saleh","doi":"10.1002/1521-401X(200112)29:5<278::AID-AHEH278>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:5<278::AID-AHEH278>3.0.CO;2-#","url":null,"abstract":"Oreochromis niloticus is an endemic species in the River Nile and represents the main object of fishery in the Nile Delta Lakes of which Lake Maryut is the smallest and most polluted. Due to current pollution problems, fish production in the lake greatly declined. Besides fish biology, this study considered a wide array of water databases in selected sites along the lake. Hydrologic and biologic data were compared to that of a reference fish hatchery. Water concentrations of ammonia, manganese, nickel, cadmium, lead and mercury proved hazardous to fish, whereas chromium, copper, iron, zinc, pH, alkalinity, hardness, phosphate, nitrate, and nitrite always fell within acceptable levels. Physiologic evaluation of O. niloticus pointed out improper growth, protein inadequacy, and functional impairment in fish inhabiting polluted sites, in particular the lake main basin. These were reflected by data of specific formulae as RNA/DNA and the relative RNA content (r) in cells of the liver and gill arches as well as by the relative mobilization of serum protein fractions. It seems, however, that growth competence is additionally affected by the stress impact exerted upon fish by massive population numbers in some cramped commercial ponds. \u0000 \u0000 \u0000 \u0000Funktionelle Beeintrachtigung des Nil-Tilapia Oreochromis niloticus (Linnaeus, 1757) durch verunreinigtes Wasser \u0000 \u0000 \u0000 \u0000Oreochromis niloticus ist eine endemische Art des Nil und das Hauptobjekt der Fischerei in den Deltaseen des Nil, unter denen der Lake Mari?t der kleinste und am starksten verunreinigte ist. In Folge der Verunreinigung ist der Fischertrag stark zuruckgegangen. Die Untersuchung berucksichtigt neben der Biologie des Fisches Daten zur Wasserbeschaffenheit an ausgewahlten Stellen des Sees. Die hydrologischen und biologischen Daten werden mit denen einer Fischzuchtanlage als Referenzstandort verglichen. Wahrend die Konzentrationen von Ammonium, Mangan, Nickel, Cadmium, Blei und Quecksilber fur Fische gefahrliche Grose erreichen, liegen die Konzentrationen von Chrom, Kupfer, Eisen und Zink sowie der ubrigen Parameter (pH-Wert, Pufferungsvermogen, Harte sowie Nahrstoffe) im akzeptablen Bereich. Physiologische Bewertungen von O. niloticus zeigen ungenugendes Wachstum, Unzulanglichkeit und funktionelle Beeintrachtigung im Proteinhaushalt an den verunreinigten Untersuchungsstationen, insbesondere im Hauptbecken des Sees. Dies wird belegt sowohl durch die Daten zum RNA/DNA-Verhaltnis und dem relativen RNA-Gehalt („r“-Wert) in Zellen der Leber und Kiemenbogen als auch durch die relative Mobilisierung der Fraktionen der Serumproteine. Es hat jedoch den Anschein, dass das Wachstum zusatzlich beeinflusst wird von Stresseinflussen auf die Fische durch hohe Populationsdichten in uberbesetzten kommerziellen Teichen.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"312 1","pages":"278-288"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75010894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fortschritte in der immunchemischen Analytik von gewässerrelevanten Schadstoffen","authors":"B. Hock","doi":"10.1002/1521-401X(200112)29:6/7<375::AID-AHEH375>3.0.CO;2-2","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:6/7<375::AID-AHEH375>3.0.CO;2-2","url":null,"abstract":"Up to now, immunoassays play a major role among immunochemical methods for water analysis. Further developments are focussed at the reduction of time required for analysis, automation, and multianalyte approaches. Important progress has been achieved in flow injection immunoanalysis, immunosensing, and array technologies. The advantages of these methodologies are mainly seen in those applications, which keep the efforts for sample preparation to a minimum. In spite of the achieved progress, especially with respect to assay sensitivities, the availability of suitable antibodies is still considered the limiting factor for the application of immunochemical methods in water analysis. The hybridoma technology has provided the basis for the production of unlimited amounts of monoclonal antibodies, i.e., homogeneous antibody preparations of unchanging quality. However, the production of new monoclonal antibodies still requires new immunisations and new animals. Only recombinant technologies offer the potential not only for inexpensive mass production, but also for the alteration of given antibody properties at the DNA level. The immune system with its possibilities for affinity maturation and diversification of antibodies is used as a model for the production of new or improved antibody properties. Antibody libraries, which represent the immune repertoire in vitro, provide the basis for the selection of suitable variants and further optimisation in subsequent diversification and selection steps. Examples are given for immunoassays with recombinant fusion proteins and Fabs for the analysis of herbizides in water.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"18 1","pages":"375-390"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75243174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fate of lignin in the process of aerobic biological treatment of paper mill wastewater","authors":"B. Helmreich, Christian Schlegl, P. Wilderer","doi":"10.1002/1521-401X(200112)29:5<296::AID-AHEH296>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:5<296::AID-AHEH296>3.0.CO;2-#","url":null,"abstract":"Although lignin is known to be not readily biodegradable the concentration of dissolved lignin decreased during aerobic biological treatment of paper mill wastewater performed in sequencing batch reactors (SBR). Systematic lab scale batch tests were conducted to clarify whether the observed removal of lignin was the result of biodegradation or adsorption onto the activated sludge. For the batch tests, sludge samples were taken from sequencing batch reactors operated at solid retention times (SRT) of 10, 15, 20, 30, and 40 days, respectively. The amount of lignin present in the bulk liquid and in the sludge samples was quantified by an analytical procedure comprising pyrolysis, gas chromatography and mass spectrometry (py-GC/MS analysis). It was found that lignin adsorbs onto the activated sludge by up to 30%[TH]w/w. This demonstrates the sludge excellent adsorption properties. The ultimate removal of lignin is achieved by sludge wasting. The highest overall removal rate was found when sludge was used from the SBR run at SRT of 20 days.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"2 1","pages":"296-300"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82405530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Definition der Hintergrund- bzw. Background-Konzentration - eine Übersicht","authors":"H. Hellmann","doi":"10.1002/1521-401X(200112)29:6/7<391::AID-AHEH391>3.0.CO;2-A","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:6/7<391::AID-AHEH391>3.0.CO;2-A","url":null,"abstract":"Zu massiven, punktuell und von Menschenhand verursachten Verschmutzungen von Luft, Wasser, Boden und Sedimenten tritt die sogenannte Background- bzw. Hintergrundbelastung. Die Ermittlung der Background-Konzentration u. a. in Boden ist nach dem Bundes-Bodenschutzgesetz zur Ableitung von Vorsorge-, Pruf- und Masnahmenwerten notwendig. Neben dem naturlichen geogenen (Schwermetalle) und biogenen (organische Spurenstoffe) Hintergrund muss auch die ubiquitar vorkommende, zumeist mit dem Luftstaub eingetragene Belastung berucksichtigt werden, die fallweise mit jener im Terminus zusammengefasst wird. Die Belange der Praxis, das Bedurfnis nach nutzungs- und schutzgutbezogenen Orientierungswerten fuhren zur Definition von lokalen oder regionalen Hintergrundwerten. Bei Sediment-Tiefenprofilen ist die Kopplung der Backgroundwerte an den Belastungstrend der atmospharischen Deposition zu berucksichtigen. Somit ist eine einheitliche, Kompartiment- ubergreifende Definition des Hintergrundwertes nicht zweckmasig. Die gebrauchlichen Definitionen, ihre Spezifizierung je nach Kompartiment (Luft, Sedimente, Boden) und ihr Bezug zu erforderlichen Masnahmen wurden in einer Tabelle zusammengefasst. \u0000 \u0000 \u0000 \u0000Definitions of Background-concentrations — an Overview \u0000 \u0000 \u0000 \u0000The heavy contamination of air, water, soil, and sediments from anthropogenic point sources occurs against the so-called background load. The determination of the background load, e.g. in soils, is needed to derive the threshold values demanded by the Federal Soil Protection Act, either as precautionary thresholds, test values, or alarm thresholds. Besides the natural geogenic background (heavy metals) and the biogenic one (organic trace substances), the ubiquitous load, usually transported by airborne dust and sometimes also included in the term background , must be taken into account.Practical requirements, such as the need for orientation values related to land uses and environmental assets to be protected, lead to the definition of local or regional background values. In the case of sediment depth profiles, the relation between background values and the contamination trend of atmospheric deposition must be considered. Consequently, a unified, inter-compartmental definition of the background values is not meaningful. The conventional definitions of “background”, their specifications for the compartments (air, sediments, soils), and their relation to actions to be taken are summarised in form of a table.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"14 1","pages":"391-398"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76428057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water quality management of mining lakes: a new field of applied hydrobiology","authors":"H. Klapper, W. Geller","doi":"10.1002/1521-401X(200112)29:6/7<363::AID-AHEH363>3.0.CO;2-E","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:6/7<363::AID-AHEH363>3.0.CO;2-E","url":null,"abstract":"Underground and opencast mining generated many new lakes, some with dimensions comparable with natural glacier lakes. Research and water quality management on these lakes is multidisciplinary. A part of them is impaired by geogenic acidification with typical pH values between 2 and 3.5. Approaches are shown how to curb acidification during the mining process, the lake generation, and as a part of the water quality management by new eco-technologies using alkalinity producing microbial processes. An interesting field is the extreme acidic environment and the adaptations of organisms and functioning of the biocenosis.","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"90 1","pages":"363-374"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89611346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Verhalten ausgewählter Arzneimittel bei der künstlichen Grundwasseranreicherung: Eliminierung und Effekte auf die mikrobielle Besiedlung","authors":"G. Preuss, U. Willme, N. Zullei-Seibert","doi":"10.1002/1521-401X(200112)29:5<269::AID-AHEH269>3.0.CO;2-#","DOIUrl":"https://doi.org/10.1002/1521-401X(200112)29:5<269::AID-AHEH269>3.0.CO;2-#","url":null,"abstract":"Mit Hilfe naturnah betriebener Modellsysteme wurde das Verhalten von Bezafibrat, Carbamazepin, Clofibrinsaure, Diclofenac, Ibuprofen und Gemfibrozil wahrend der kunstlichen Grundwasseranreicherung untersucht. Hierbei wurden die Wirkstoffe mit einer Konzentration von 100 μg/L den Modellsystemen uber vier Wochen kontinuierlich zugefuhrt. Die Analytik der Arzneimittel im Zu- und Ablauf der Systeme erfolgte mittels GC-MS. Die Ergebnisse zeigten in Modell-Langsamsandfiltern eine gute Eliminierung (60 bis 80%) von Bezafibrat, Diclofenac und Ibuprofen, eine mittlere Eliminierung (40 bis 60%) von Clofibrinsaure und Gemfibrozil und eine geringe Eliminierung (20 bis 40%) von Carbamazepin. Die Adaptationszeiten bis zum Einsetzen der Eliminierungsprozesse betrugen uberwiegend 5 Tage, fur Carbamazepin 15 bis 17 Tage. In Grundwasser-Modellsystemen war unter verschiedenen Milieubedingungen eine hohe Stabilitat der Testsubstanzen mit Gesamteliminierungsraten von Null bis <20% zu beobachten. Lediglich Diclofenac konnte in aeroben Systemen mit 60 bis 80% und in anaeroben Systemen mit 40 bis 60% eliminiert werden. Mit Hilfe vergleichender DNA-Fingerprints, die mittels Denaturierender Gradienten-Gel-Elektrophorese eubakterieller 16S-rDNA-Sequenzen erstellt wurden, konnten Veranderungen der mikrobiellen Besiedlungszusammensetzung in Modell-Langsamsandfiltern aufgrund von Adaptationsprozessen dargestellt werden. \u0000 \u0000 \u0000 \u0000Behaviour of Some Pharmaceuticals during Artificial Groundwater Recharge – Elimination and Effects on Microbiology \u0000 \u0000 \u0000 \u0000The behaviour of bezafibrate, carbamazepine, clofibric acid, diclofenac, ibuprofen, and gemfibrozil during artificial groundwater recharge was investigated with different test systems simulating field conditions. The given concentrations of the pharmaceuticals were 100 μg/L in the influent of the systems. Concentrations in the influent as well as in the effluent were measured by GC-MS. These column experiments indicated a significant elimination of bezafibrate, diclofenac, and ibuprofen (60 to 80%) during slow sand filtration. The results showed a moderate elimination of clofibric acid and gemfibrozil (40 to 60%) but a rather low elimination of carbamazepine (<40%). The adaptation times until the elimination processes started were about 5 days. Only the elimination of carbamazepine needed a lag phase up to 17 days. Additional column experiments with groundwater model systems indicated a high persistence of pharmaceuticals under aerobic and anaerobic groundwater conditions. The elimination was less than 20%. Only diclofenac was eliminated with rates between 60% and 80% in aerobic systems and between 40% and 60% in anaerobic systems. Analysis of eubacterial 16S-rDNA by PCR and DGGE demonstrated changes in the microbial community structure in slow sand filters after application of pharmaceuticals. Adaptation processes may cause these changes, e.g. the appearance or disappearance of single species. Also differences between the population","PeriodicalId":7010,"journal":{"name":"Acta Hydrochimica Et Hydrobiologica","volume":"7 1","pages":"269-277"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81854415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}