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Xu, Yanghui (author), Ou, Q. (author), Wang, Xintu (author), Hou, Feng (author), Li, Peng (author), van der Hoek, J.P. (author), Liu, G. (author)The level of microplastics (MPs) in wastewater treatment plants (WWTPs) has been well evaluated by the particle number, while the mass concentration of MPs and especially nanoplastics (NPs) remains unclear. In this study, pyrolysis gas chromatography-mass spectrometry was used to determine the mass concentrations of MPs and NPs with different...journal article 2023
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Fang, Jiaxing (author), Dai, Zihan (author), Li, Xiaoming (author), van der Hoek, J.P. (author), Savić, Dragan (author), Medema, G.J. (author), van der Meer, Walter (author), Liu, G. (author)Biofilm detachment contributes to water quality deterioration. However, the contributions of biofilm detachment from different pipes have not been quantified or compared. Following the introduction of partial reverse osmosis (RO) in drinking water production, this study analyzed particles at customers’ ends and tracked their origins to water...journal article 2023
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Li, Jun (author), Ren, Anran (author), van der Mark, Ed (author), Liu, G. (author)Drinking water quality deteriorates from treatment plant to customer taps, especially in the plumbing system. There is no direct evidence about what the differences are contributed by plumbing system. This study compared the water quality in the water main and at customer tap by preparing a sampling tap on the water main. The biomass was...journal article 2022
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Zhai, Yujia (author), Liu, G. (author), van der Meer, Walter G.J. (author)The presence of newly emerging pollutants in the aquatic environment poses great challenges for drinking water treatment plants. Due to their low concentrations and unknown characteristics, emerging pollutants cannot be efficiently removed by conventional water treatment processes, making technically, economically, and environmentally...journal article 2022
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- Qu, Jiuhui (author), Liu, Huijuan (author), Liu, G. (author) contribution to periodical 2022
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Zhao, Jian (author), Fang, Shangbiao (author), Liu, G. (author), Qi, Weixiao (author), Bai, Yaohui (author), Liu, Huijuan (author), Qu, Jiuhui (author)Biodegradation plays an important role in the removal of organic micropollutants (OMPs) during riverbank filtration (RBF) for drinking water production. The ability of ammonia-oxidizing microorganisms (AOM) to remove OMPs has attracted increasing attention. However, the distribution of AOM in RBF and its role in the degradation of OMPs...journal article 2022
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Chen, L. (author), Li, Xuan (author), van der Meer, Walter (author), Medema, G.J. (author), Liu, G. (author)The aperiodic changes in the quantity and community of planktonic and particle-associated bacteria have hampered the understanding and management of microbiological water quality in drinking water distribution systems. In this study, online sampling was combined with the microbial fingerprint-based SourceTracker2 to capture and trace the...journal article 2022
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Sousi, Mohaned (author), Salinas-Rodriguez, Sergio G. (author), Liu, G. (author), Dusseldorp, Jos (author), Kemperman, Antoine J.B. (author), Schippers, Jan C. (author), van der Meer, Walter G.J. (author), Kennedy, M.D. (author)The bacterial growth potential (BGP) of drinking water is widely assessed either by flow cytometric intact cell count (BGP<sub>ICC</sub>) or adenosine triphosphate (BGP<sub>ATP</sub>) based methods. Combining BGP<sub>ICC</sub> and BGP<sub>ATP</sub> measurements has been previously applied for various types of drinking water having high to low...journal article 2021
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Wu, Juan (author), Zhai, Y. (author), Liu, G. (author), Bosker, Thijs (author), Vijver, Martina G. (author), Peijnenburg, Willie J.G.M. (author)Assessment of chronic impact of metallic nanoparticles (NPs) in soil ecosystems is a necessity for ensuring safe and sustainable application. NPs affect plants and their associated microbial life, while the plants and their associated microbiota affect the NPs' fate. Here, we measured the available Ag pool (determined as...journal article 2021
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Ahmad, J.I. (author), Giorgi, Sara (author), Zlatanovic, L. (author), Liu, G. (author), van der Hoek, J.P. (author)Drinking water distribution networks (DWDNs) have a huge potential for cold thermal energy recovery (TED). TED can provide cooling for buildings and spaces with high cooling requirements as an alternative for traditional cooling, reduce usage of electricity or fossil fuel, and thus TED helps reduce greenhouse gas (GHG) emissions. There is no...journal article 2021
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Liu, G. (author), Yan, Qun (author), Zhou, Yanan (author), Zhang, X. (author), Spanjers, H. (author)2D-g-C<sub>3</sub>N<sub>4</sub> nanosheet was prepared and employed for the adsorption of elemental mercury (Hg<sup>0</sup>). The g-C<sub>3</sub>N<sub>4</sub> was analyzed through X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR) methods, and the results showed that the prepared...journal article 2021
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Xu, Yanghui (author), Ou, Q. (author), Jiao, Meng (author), Liu, G. (author), van der Hoek, J.P. (author)Nanoplastics (NPs) are currently considered an environmental pollutant of concern, but the actual extent of NP pollution in environmental water bodies remains unclear and there is not enough quantitative data to conduct proper risk assessments. In this study, a pretreatment method combining ultrafiltration (UF, 100 kDa) with hydrogen peroxide...journal article 2021
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Chen, L. (author), Zhai, Y. (author), van der Mark, Ed (author), Liu, G. (author), van der Meer, Walter (author), Medema, G.J. (author)Slow sand filters (SSFs) are widely applied to treat potable water; the removal of contaminants (e.g., particles, organic matter, and microorganism) occurs primarily in the top layer. However, the development of the microbial community and its metabolic function is still poorly understood. In the present study, we analyzed the microbial...journal article 2021
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Ahmad, J.I. (author), Dignum, Marco (author), Liu, G. (author), Medema, G.J. (author), van der Hoek, J.P. (author)Drinking water distribution systems (DWDSs) have been thoroughly studied, but the concept of thermal energy recovery from DWDSs is very new and has been conceptualized in the past few years. Cold recovery results in a temperature increase of the drinking water. Its effects on drinking water quality and biofilm development are unclear. Hence, we...journal article 2021
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Sousi, Mohaned (author), Salinas-Rodriguez, Sergio G. (author), Liu, G. (author), Schippers, Jan C. (author), Kennedy, M.D. (author), van der Meer, Walter (author)Measuring bacterial growth potential (BGP) involves sample pre-treatment and inoculation, both of which may introduce contaminants in ultra-low nutrient water (e.g., remineralized RO permeate). Pasteurization pre-treatment may lead to denaturing of nutrients, and membrane filtration may leach/remove nutrients into/from water samples....journal article 2020
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Sousi, Mohaned (author), Liu, G. (author), Salinas-Rodriguez, Sergio G. (author), Chen, L. (author), Dusseldorp, Jos (author), Wessels, Peter (author), Schippers, Jan C. (author), Kennedy, M.D. (author), van der Meer, Walter (author)Although water produced by reverse osmosis (RO) filtration has low bacterial growth potential (BGP), post-treatment of RO permeate, which is necessary prior to distribution and human consumption, needs to be examined because of the potential re-introduction of nutrients/contaminants. In this study, drinking water produced from anaerobic...journal article 2020
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Chen, L. (author), Ling, Fangqiong (author), Bakker, Geo (author), Liu, Wen Tso (author), Medema, G.J. (author), van der Meer, W.G.J. (author), Liu, G. (author)Worldwide, it is common that the drinking water distribution systems (DWDSs) may be subjected to changes of supply water quality due to the needs of upgrading the treatment processes or switching the source water. However, the potential impacts of quality changed supply water on the stabilized ecological niches within DWDSs and the associated...journal article 2020
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Liu, G. (author), Zhang, Ya (author), Liu, X. (author), Hammes, Frederik (author), Liu, Wen Tso (author), Medema, G.J. (author), Wessels, Peter (author), van der Meer, W.G.J. (author)In the present study, triplicate rings of 360° pipe surfaces of an operational drinking water distribution pipe were swabbed. Each ring was equally divided into 16 parts for swabbing. The collected swabs were grouped into 3 sections and compared with the biofilm samples sampled by sonication of specimens from the same pipe. The results showed...journal article 2020
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Ahmad, J.I. (author), Liu, G. (author), van der Wielen, Paul (author), Medema, G.J. (author), van der Hoek, J.P. (author)Drinking water distribution systems (DWDSs) are used to supply hygienically safe and biologically stable water for human consumption. The potential of thermal energy recovery from drinking water has been explored recently to provide cooling for buildings. Yet, the effects of increased water temperature induced by this “cold recovery” on the...journal article 2020
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Zhai, Yujia (author), Hunting, Ellard R. (author), Liu, G. (author), Baas, Elise (author), Peijnenburg, Willie J.G.M. (author), Vijver, Martina G. (author)Titanium dioxide nanoparticles (TiO<sub>2</sub>NP) are increasingly released in soil ecosystems, while there is limited understanding of the impacts of TiO<sub>2</sub>NP on soil bacterial communities. Here we investigated the effects of TiO<sub>2</sub>NP on the taxonomic composition and functional profile of a soil bacterial community over a...journal article 2019
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