Bromate removal in an ozone - granular activated carbon filtration process for organic micropollutants removal from wastewater

Organic micropollutants (OMPs) enter the aquatic environment via municipal wastewater treatment plants (WWTPs). As conventional WWTPs have limited capacity for the removal of OMPs, additional processes are required, like ozone - granular activated carbon (GAC) filtration. A specific lay-out of this process is the O3-STEP® process, in which the...

Nitrate Pollution in the Northern Cartago Region

Growing concerns about elevated nitrate levels in natural springs on the southern slope of the Irazu Volcano, Cartago province in Costa Rica, were the driving force for a multi-disciplinary study on the problem. The region is characterized by its high agricultural output and steep slopes. More than sixty springs located in the area are managed...

Rethinking Parks In a Shrinking Setting: The Marrying of Social Restoration and Nitrate Remediation for a New Urban Park Model in Parkstad Limburg

The project is situated in Parkstad, South Limburg, an administrative region consisting of 7 municipalities, formerly known as the East Mining Region. Deindustrialisation completely transformed the region, making it the first shrinking area of the Netherlands. Shrinkage commonly refers to a shrinking economy, shrinking population and increased...

Hydroxylamine metabolism of Ca. Kuenenia stuttgartiensis

Hydroxylamine is a key intermediate in several biological reactions of the global nitrogen cycle. However, the role of hydroxylamine in anammox is still not fully understood. In this work, the impact of hydroxylamine (also in combination with other substrates) on the metabolism of a planktonic enrichment culture of the anammox species Ca....

Alternative pool water treatment: and the in fluence of swimmers on pool water quality

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...

Bromate reduction by iron(II) during managed aquifer recharge: A laboratory-scale study

The removal of bromate (BrO₃ ^-) as a byproduct of ozonation in subsequent managed aquifer recharge (MAR) systems has so far gained little attention. This preliminary study with anoxic batch experiments was executed to explore the feasibility of chemical BrO₃ ^- reduction in Fe-reducing zones of MAR...

Mitigation potential of sanitation infrastructure on groundwater contamination by nitrate in maputo

In Maputo, the capital of Mozambique, nitrate concentrations above 250 mg L??1 in groundwater have been reported. This happens due to the widespread use of latrines and septic tanks that allow for constant infiltration of its content into the soil and eventually to groundwater sources, a situation that is widespread in the Global South and...

Testing the Hydrological Landscape Unit Classification System and Other Terrain Analysis Measures for Predicting Low-Flow Nitrate and Chloride in Watersheds

Elevated nitrate concentrations in streamwater are a major environmental management problem. While land use exerts a large control on stream nitrate, hydrology often plays an equally important role. To date, predictions of low-flow nitrate in ungauged watersheds have been poor because of the difficulty in describing the uniqueness of watershed...