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Frey, Veronika (author), Kraaijvanger, Joost (author), Lorenzen da Silva, Valentin (author), Oudenes, Derby (author)In this project, student teams from Universidad San Francisco de Quito and Delft University of Technology worked together to provide safe drinking water in Ecuador. We used M-100 chlorinators from the company WaterStep, donated by Water Ambassadors Canada, to chlorinate water in schools and communities. The journey involved testing water quality...student report 2023
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Hu, Joey (author)Photosensitizers play a key role in photodynamic therapy as a drug that is activated by light. In this thesis, the effect of ionizing radiation on the generation of singlet oxygen when using photosensitizers (Chlorin e6) and photocatalysts (titanium dioxide) was studied. By using radionuclides and photosensitizers (PS), cells can be killed with...bachelor thesis 2023
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Wang, Feifei (author), Hua, Yulin (author), Pan, Jiazheng (author), Zhou, Jie (author), Hea, Chiquan (author), Hofman, J.A.M.H. (author), Chu, Wenhai (author), van der Hoek, J.P. (author)In drinking water treatment plants (DWTPs), the widely used biological activated carbon filters (BACFs), as the last barrier before disinfection, can remove dissolved organic matter (DOM) known as precursors of disinfection by-products (DBPs). Whether phosphate addition can improve water purification and DBP control of BACFs is still...journal article 2023
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Calderon Franco, D. (author), Corbera Rubio, F. (author), Cuesta Sanz, M. (author), Pieterse, Brent (author), de Ridder, David (author), van Loosdrecht, Mark C.M. (author), van Halem, D. (author), Laureni, M. (author), Weissbrodt, D.G. (author)Drinking water treatment plants (DWTPs) are designed to remove physical, chemical, and biological contaminants. However, until recently, the role of DWTPs in minimizing the cycling of antibiotic resistance determinants has got limited attention. In particular, the risk of selecting antibiotic-resistant bacteria (ARB) is largely overlooked in...journal article 2023
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Teo, Ying Shen (author), Jafari, Iman (author), Liang, Fei (author), Jung, Youmi (author), van der Hoek, J.P. (author), Ong, Say Leong (author), Hu, Jiangyong (author)The UV/Cl2 process (also known as chlorine photolysis, which is the combination of chlorine and simultaneous irradiation of UV light) is conventionally applied at acidic mediums for drinking water treatment and further treatment of wastewater effluents for secondary reuse. This is because the quantum yield of HO• from HOCl (ϕHO•, 254 = 1.4) is...journal article 2022
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Illathukandy, Biju (author), Saadabadi, S.A. (author), Kuo, P.C. (author), Wasajja, H. (author), Lindeboom, R.E.F. (author), Vijay, V. (author), Aravind, P.V. (author)This study is particularly aimed at investigating the influence of hydrogen chloride traces in biogas on direct internal reforming in solid oxide fuel cells (SOFCs). The experiments are performed with simulated biogas containing methane to carbon dioxide ratio of 3:2, the usual average proportion in biogas. To the best of our knowledge, there...journal article 2022
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Wang, Feifei (author), Pan, Jiazheng (author), Hu, Yulin (author), Zhou, Jie (author), Wang, Haoqian (author), Huang, Xin (author), Chu, Wenhai (author), van der Hoek, J.P. (author)Biological activated carbon (BAC) filtration is usually considered to be able to decrease formation potentials (FPs) of disinfection by-products (DBPs) in drinking water treatment plant (DWTP). However, BAC filters with long running time may release microbial metabolites to effluents and therefore increase FPs of nitrogenous DBPs with high...journal article 2022
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Liu, H. (author), Laan, A.C. (author), Plomp, J. (author), Parnell, S.R. (author), Men, Y. (author), Dalgliesh, Robert M. (author), Eelkema, R. (author), Denkova, A.G. (author)Polymeric micelles, due to their easy preparation and versatile properties, have been widely applied as one of the most popular carriers for chemotherapeutic agents. Such micelles primarily prevent the leakage of drugs during transportation and thus protect healthy tissue. Controlled drug release, which releases the drugs at the site of...journal article 2021
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Shi, Haoran (author)Drinking water safety is of great concern all around the world. Two strategies can be pursued to maintain biological stable drinking water during distribution in the network: (i) without a residual disinfectant, in which bacterial growth is controlled by very low biodegradable nutrients in the water by extensive pre-treatment and a well...master thesis 2020
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Pinel, I.S.M. (author), Moed, D. H. (author), Vrouwenvelder, J.S. (author), van Loosdrecht, Mark C.M. (author)Understanding the bacterial dynamics in cooling towers is imperative for the assessment of disinfection efficiency and management of microbial risks linked to aerosol formation. The objective of this study was to evaluate the impact of feed water on the cooling water bacterial microbiome and investigate the survival ability of its members...journal article 2020
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Zhou, X. (author), Ahmad, J.I. (author), van der Hoek, J.P. (author), Zhang, Kejia (author)Thermal energy recovery from drinking water has a high potential in the application of sustainable building and industrial cooling. However, drinking water and biofilm microbial qualities should be concerned because the elevated water temperature after cold recovery may influence the microbial activities in water and biofilm phases in drinking...journal article 2020
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Diafonidis, Orestis (author)To fend off the probable adverse effects of climate change as well as the subsequent economic and social impacts as a consequence of humans’ industrial activities, drastic changes are required in the way of processing, managing and exploiting natural resources. Based on a case study, the present report combines life-cycle assessment and life...master thesis 2019
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Ismail, M.B.M. (author), Schroeder, Lea (author), Frese, Marcel (author), Kottke, Tilman (author), Hollmann, F. (author), Paul, C.E. (author), Sewald, Norbert (author)Flavin-dependent halogenases are known to regioselectively introduce halide substituents into aromatic moieties, for example, the indole ring of tryptophan. The process requires halide salts and oxygen instead of molecular halogen in the chemical halogenation. However, the reduced cofactor flavin adenine dinucleotide (FADH<sub>2</sub>) has to...journal article 2019
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Thouement, H.A.A. (author), Kuder, Tomasz (author), Heimovaara, T.J. (author), van Breukelen, B.M. (author)Back-diffusion of chlorinated ethenes (CEs) from low-permeability layers (LPLs) causes contaminant persistence long after the primary spill zones have disappeared. Naturally occurring degradation in LPLs lowers remediation time frames, but its assessment through sediment sampling is prohibitive in conventional remediation projects. Scenario...journal article 2019
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van Bel, Nikki (author), Hornstra, Luc M. (author), van der Veen, Anita (author), Medema, G.J. (author)To ensure delivery of microbiologically safe drinking water, the physical integrity of the distribution system is an important control measure. During repair works or an incident the drinking water pipe is open and microbiologically contaminated water or soil may enter. Before taking the pipe back into service it must be cleaned. The efficacy of...journal article 2019
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Keuten, M.G.A. (author)As swimmers enter a swimming pool, they release micro-organisms, particles and soluble substances. While chlorine is often used to inactivate micro-organisms, a side-effect of chlorination is the formation of unwanted disinfection by-products. In order to reduce these by-products, more knowledge is needed on the release of pollutants by bathers...doctoral thesis 2018
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Ilyas, Huma (author), Masih, Ilyas (author), van der Hoek, J.P. (author)This paper presents a comprehensive and critical comparison of 10 disinfection methods of swimming pool water: chlorination, electrochemically generated mixed oxidants (EGMO), ultraviolet (UV) irradiation, UV/chlorine, UV/hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), UV/H<sub>2</sub>O<sub>2</sub>/chlorine, ozone (O<sub>3</sub>)/chlorine, O...review 2018
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Peters, M.C.F.M. (author), Keuten, M.G.A. (author), Knezev, Aleksandra (author), van Loosdrecht, Mark C.M. (author), Vrouwenvelder, J.S. (author), Rietveld, L.C. (author), de Kreuk, M.K. (author)Bathers release bacteria in swimming pool water, but little is known about the fate of these bacteria and potential risks they might cause. Therefore, shower water was characterized and subjected to chlorination to identify the more chlorine-resistant bacteria that might survive in a chlorinated swimming pool and therefore could form a...journal article 2018
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Ilyas, Huma (author), Masih, Ilyas (author), van der Hoek, J.P. (author)This paper investigates disinfection by-products (DBPs) formation and their relationship with governing factors in chlorinated swimming pools. The study compares concentrations of DBPs with WHO guidelines for drinking water quality recommended to screen swimming pool water quality. The statistical analysis is based on a global database of 188...journal article 2018
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van Breukelen, B.M. (author), Thouement, H.A.A. (author), Stack, Philip E. (author), Vanderford, Mindy (author), Philp, Paul (author), Kuder, Tomasz (author)Reactive transport modeling of multi-element, compound-specific isotope analysis (CSIA) data has great potential to quantify sequential microbial reductive dechlorination (SRD) and alternative pathways such as oxidation, in support of remediation of chlorinated solvents in groundwater. As a key step towards this goal, a model was developed...journal article 2017
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