‘‘Peepers’’ (dialysis samplers) rely on exchange across a dialysis membrane between fluid-filled cells and the surrounding sediment in order to sample the pore water at various depths. In the current study, we show that under some realistic circumstances, where there is a large density difference between the pore water and the cell fluid in permeable sediments, the resulting convective motion i...

We examine mixture separations with microporous adsorbents such as zeolites, metal-organic frameworks (MOFs) and zeolitic imidazolate frameworks (ZIFs), operating under conditions close to pore saturation. Pore saturation is realized, for example, when separating bulk liquid phase mixtures of polar compounds such as water, alcohols and ketones. For the operating conditions used in industrial pr...

BACKGROUND Seasonal changes in pore water and sediment redox geochemistry have been observed in many near-surface sediments. Such changes have the potential to strongly influence trace metal distribution and thus create seasonal fluctuations in metal mobility and bioavailability. RESULTS Seasonal trends in pore water and sediment geochemistry are assessed in the upper 50 cm of littoral kettle...

Sediment internal nitrogen release is a significant pollution source in the overlying water of aquatic ecosystems. This study aims to remove internal nitrogen in sediment-water microcosms by coupling sediment microbial fuel cells (SMFCs) with submerged aquatic plants. Twelve tanks including four treatments in triplicates were designed: open-circuit (SMFC-o), closed-circuit (SMFC-c), aquatic pla...

The relevance of particulate organic carbon (POC) for carbon composition in the pore water of drained and rewetted fens of the “Donauried” (South-Germany) S. Fiedler, B. S. Höll, A. Freibauer, K. Stahr, M. Drösler, M. Schloter, and H. F. Jungkunst Institute of Soil Science and Land Evaluation, Univ. of Hohenheim, Emil-Wolff-Strasse 27, 70599 Stuttgart, Germany Ludwig-Maximilians Univ., Dept. of...

drinking water quality can be deteriorated by microbial and toxic chemicals during transport, storage and handling before using by the consumer. this study was conducted to evaluate the microbial and physicochemical quality of drinking water from bottled water coolers.a total of 64 water samples, over a 5-month period in 2012-2013, were collected from free standing bottled water coolers and wat...

The environmental quality of 6 famous sand beaches the Ha Long - Cat Ba area was surveyed in July 2018 (the rainy season) and March 2019 dry season). results showed that pore water layer below surface contained some pollutants exceeding critical value QCVN 10:2015/BTNMT for coastal ASEAN-criteria, including TSS, ammonium nitrate. In season, lower than indicating tourism influenced sandy beach q...

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to know the water quality characteristics of tehran subterranean canals, from 20 feb. 1978 to 23 sept. 1978, samples were taken from 23 of them by simple random sampling without replacement, and were analyzed according to the 14th edition of standards method for the examination of water and waste water 1975. arithmetic average concentration of water analyses of 23 subterranean canals were drawn...

neurotoxicants present in water supply may affect human functions in terms of attention, response speed and perceptual motor speed. neurobehavioural performance can be influenced by gender, age and education levels. this study aims to assess the neurobehavioral performance of palm oil estate residents with private water supply in southern peninsular of malaysia.a total of 287 and 246 participan...