MnO4 – Fe(III) dosing to rapid sand filters for removing arsenic from drinking water to <1 µg/l: A case study in Katwijk (Dunea)

Drinking water company Dunea N.V. produces drinking water by artificially infiltrating water into the dunes. During this dune passage arsenic is mobilized causing arsenic levels up to 4 µg/l in the influent of DWTP Katwijk. In this thesis the effectiveness of the MnO4 – Fe(III) dosing was evaluated on RSF influent of Dunea’s treatment plant...

Validation of a sensor setup and interpretation method for in situ degradation studies of coated metals with electrochemical impedance spectroscopy

Corrosion has a large negative effect on the service life of metallic substrates, such as cars, bikes and boats. To reduce the corrosion rate, the bare metal can be isolated from the corrosive environment by applying an organic coating (paint). As metals corrode, organic coatings degrade. Temperature, wet-dry cycles and UV-light all have an...

Child Friendly Cities: The Case of Wroclaw in Poland

Like many other cities in Europe, Wroc?aw in Poland aims to improve the livability of children by implementing sustainable urban mobility measures, but fails to be successful. Due to an ongoing outflow of families from the city to the periphery and region, a vicious circle of an ongoing increase in car use has occured which increasingly...

The influence of an Ecobeach PEM on beach development

Since the end of 2006 in the Netherlands a test is going on with a passive beach drainage system called Ecobeach. The system consists of vertical draining tubes with a length of 2.0 m called PEMs (Pressure Equalizing Modules). Under the surface level, every 100 m a row of PEMs is installed between the high and low waterline. Ecobeach is a Danish...

Patterns of crude demand: Future patterns of demand for crude oil as a function of refining capacity and product market change

Deuvelwerking van randbalken in prefabbouw: Bepaling van sterkte en afschuifstijfheid van een randbalk, ingeklemd tussen prefab gevelelementen, als onderdeel van een betonnen stabiliteitsconstructie

Prefabricage van beton is op de Nederlandse bouwmarkt sinds de tweede wereld oorlog een standaard fenomeen geworden. Door Stufib studiecel 6 is in oktober 2004 vastgesteld dat een stapeling van gevelelementen waarbij de verticale voegen over de hoogte van het gebouw verspringen vanuit constructief oogpunt een goed alternatief is voor...