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Formation and control of nitrogenous DBPs from Western Australian source waters: Investigating the impacts of high nitrogen and bromide concentrations

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Journal of Environmental Sciences 2017年第8期29卷 102-115页

作者： Ina kristiana Deborah Liew rita k.henderson Cynthia A.Joll kathryn L.Linge Curtin Water Quality Research Centre Department of Chemistry Curtin University School of Chemical Engineering University of New South Wales

We studied the formation of four nitrogenous DBPs（N-DBPs） classes（haloacetonitriles,halonitromethanes, haloacetamides, and N-nitrosamines）, as well as trihalomethanes and total organic halogen（TOX）, after chlorination or chloramination of source waters. We also evaluated the relative and additive toxicity of N-DBPs and water treatment options for minimisation of N-DBPs. The formation of halonitromethanes, haloacetamides, and N-nitrosamines was higher after chloramination and positively correlated with dissolved organic nitrogen or total nitrogen. N-DBPs were major contributors to the toxicity of both chlorinated and chloraminated waters. The strong correlation between bromide concentration and the overall calculated DBP additive toxicity for both chlorinated and chloraminated source waters demonstrated that formation of brominated haloacetonitriles was the main contributor to toxicity. Ozone–biological activated carbon treatment was not effective in removing N-DBP precursors. The occurrence and formation of N-DBPs should be investigated on a case-by-case basis, especially where advanced water treatment processes are being considered to minimise their formation in drinking waters, and where chloramination is used for final disinfection.

关键词： Haloacetonitriles Haloacetamides Halonitromethanes N-nitrosamines Chlorination Chloramination

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Influence of COM-peptides/proteins on the properties of flocs formed at different shear rates

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Journal of Environmental Sciences 2019年第6期31卷 116-127页

作者： Monika Filipenska Petra Vasatova Lenka Pivokonska Lenka Cermakova andrea Gonzalez-Torres rita k.henderson Jana Naceradska Martin Pivokonsky Institute of Hydrodynamics of the Czech Academy of Sciences Institute for Environmental Studies Faculty of Science Charles University The bioMASS Lab School of Chemical Engineering The University of New South Wales

Coagulation followed by floc separation is a key process for the removal of algal organic matter(AOM) in water treatment. Besides optimizing coagulation parameters,knowledge of the properties of AOM-flocs is essential to maximizing AOM ***, the impact of AOM on the floc properties remains unclear. This study investigated how peptides/proteins derived from the cellular organic matter(COM) of the cyanobacterium Microcystis aeruginosa influenced the size, structure, and shape of flocs formed at different shear rates(G). Flocs formed by kaolinite, COM-peptides/proteins and a mixture of the same were studied, and the effect of intermolecular interactions between floc components on floc properties was assessed. The coagulation experiments were performed in a Taylor–Couette reactor, with aluminum(Al) or ferric sulphate(Fe) utilized as coagulants. Image analysis was performed to gauge floc size and obtain data on fractal dimension. It was found that floc properties were affected by the presence of the COM-peptides/proteins and the coagulant used. COM-peptides/proteins increased floc size and porosity and widened floc size distributions. The Fe coagulant produced larger and less compact flocs than Al coagulant. Moreover, the decrease in floc size that occurred in parallel with increase in shear rate was not smooth in progress. A rapid change for the kaolinite-coagulant suspension and two rapid changes for the suspensions containing COM were observed. These were attributed to various intermolecular interactions between floc components participating in coagulation at different G. Based on the results obtained, shear rates suitable for efficient separation of flocs containing COM were suggested.

关键词： Algal organic matter Floc size Coagulation Image analysis Water treatment

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欧洲中央银行（ECB）

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城市环境设计 2020年第4期 162-173页

作者：沃尔夫·狄·普瑞克斯 Magdalena Baczkowska Markus Baumann Michael Beckert Johannes Behrens Hilde Benda Marcelo Bernardi Nico Boyer Jan Brosch Timo Carl Anna rita Cedroni Jasmin Dieterle Sabrina Dlugosch Jan Ruben Fischer Brigitte Fuchs Sergio Gonzales Gesine G?rlich Martin Gruber Guthu Hallstein Sebastian Haffner Simone Hainz Sascha Hempel Rob henderson Emanuele Iacono Martin Jelinek Rashmi krishna Jois Ivana Jug Frank Pascal kaul Matt kirkham Daniela kr?hnert Bernward krone Christian Labud Anke Lammert Monika Lyzyczka Steven M Christian Maeder Dimitra Mamou Ariane Marx Christoph Maurer Matthias Niemeyer Martin Oberascher Ross Olson Renate Ott Gerhard Pfeiler Ellen Pietrzyk James Pike Robert Pippan Jakob Przybylo Anna Ptaszynska Stephanie Rathgeber Carmen Renz Salome Reves Donna Riedel Akvile Rimantaite Pete Rose Penelope Rüttimann Stefan Rutzinger Oliver Sachse kristina Schinegger Benjamin Schmidt Marita Schnepper Thomas Siegl Ebru Simsek-Lenk Denise Sokolowski Augustin Solorzano Anja Sorger Andrea St?llenwerk Ernst Stockinger Crystal k.H Tang Jürgen Tiltmann Markus Tritthart Josef Tr?ster Günther Weber Andreas Weissenbach Clemens Werb Judith Werkh?user Markus Wings Eva Wolf Barbara Zeleny Thomas Zengger Zeyneb Badur Fabien Barthelemey Oliver Cassik Alejandro Corena Alexander Daxb?ck Mario Dign?ss Helmut Fr?tscher Annegret Haider Christian Halm Gregor kassl Gernot k?fer Alexander Laber Anita Lischka Rangel Malinov Oliver Martinz Philipp Munz Barbara Roller Nicole Rumpler Wolfgang Ruthensteiner Stefan Salchinger Stefan Schadenb?ck Thomas Schwed Hannes Schwed Eckart Schwerdtfeger Sylvia Spernbauer Christoph Treberspurg Johannes Weigl Paul Raftery European Central Bank/RobertMetsch Markus Pillhofer

项目大事记/CHRONOLOGY竞赛/Competition:第一阶段/Phase 1:2003;第二阶段/Phase 2:2003-2004;修改阶段/Revision Phase:2004;优化阶段/Optimization Phase:2005规划设计起始时间/Start of Planning:2005前期工程/Preliminary Site Works:2008主体施工/Main Construction Works:2010竣工/Completion:2014项目参数/PROJECT DATA用地面积/Site Area:120 000m2建筑毛面积/Gross Floor Area:185 000m2

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