Improving environmental risk assessment of pesticides in surface waters

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

Promotor: M.T.M. Koper, Co-promotor: J.B.F. Juurlink

Curved single crystals provide variable, but well-defined surface structures.

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: H.M. Cuppen, S. Ioppolo

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

The local ordering of atoms at the surface of a metallic particle determines its catalytic activity and selectivity. As energy systems of the future will be based on efficient catalytic conversion of small molecules in closed cycles, we study how structural effects of catalysts can be used to our ad…

On 24 September the Institute of Environmental Sciences (CML) in Leiden will launch the new version of the Pesticides Atlas in cooperation with Rijkswaterstaat and Royal HaskoningDHV. The online tool is now faster, more user-friendly, more accessible and all data can be downloaded directly. Users can…

The Dutch atlas with pesticides concentrations in surface waters have been overhauled. This new, free accessible, website is in line with the European Framework Directive on Water (In Dutch: KRW).

Promotores: P. Stevenhagen, L. van Geemen Co-promotor: R.M. van Luijk

Promotor: G. J. Kroes

How do societies move forward with sustainable, effective and efficient management of Earth's water resources?

Heterogeneous catalysis is essential to many industrial applications. These catalysts are often comprised of supported nanoparticles, which contain various different surface sites.

Leiden University is committed to reducing our water consumption.

Promotores: P. Stevenhagen, L. van Geemen (Università degli studi di Milano), Co-Supervisor: Ronald M. van Luijk

Promotor: E. Bouwman, Co-promotor: S. Bonnet

Promotor: Prof.dr. G.R. de Snoo, Co-promotores: Dr. ing. M.G. Vijver, J.P.M. Vink

On 27 January 2022 Tjahjono Prasodjo successfully defended a doctoral thesis and graduated.

In this thesis integral points on affine del Pezzo surfaces are studied.

In the Catalysis and Surface Chemistry group, we investigate how catalysis works on the molecular level. The group is divided in six subgroups, focusing on different aspects of heterogeneous catalysis, homogeneous catalysis and electrocatalysis.

CML report 192

Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metal-dielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…

Promotor: Peter Stevenhagen

Several techniques are explored for going beyond the born-oppenheimer static surface model for molecule-surface reactions.

Koper

Interview in the popular journal for the agricultural sector Nieuwe Oogst with CML-researcher Martina Vijver about the Dutch policy on pesticides and it’s possible conflicts with the aims for clear surface and groundwater.

Theorists have recently made substantial progress in simulating reactive molecule-metal surface scattering but still face major challenges. The grand challenge is to develop an approach that enables accurate predictive calculations of reactions involving electronically excited states with potential…

van Luijk

Promotor: P. Stevenhagen, Co-promotor: R.M. van Luijk

Leiden astronomers and ecologists are developing an instrument that lets people measure the quality of surface water with a smartphone.This international citizen science project, MONOCLE, is a collaboration between scientists and local people in Tanzania, Brazil and four European countries.

Like a mixture of oil and water, lipid membranes separate into two liquid phases.

Promotor: M.T.M. Koper, Co-Promotor: F. Calle-Vallejo

Water is all around us and is vital for all aspects of life. Studying the various compounds and life forms that inhabit natural waters lets us better understand the world around us.

This thesis contains results on the arithmetic and geometry of del Pezzo surfaces of degree 1.In Chapter 1 we give the necessary background, assuming the reader is familiar with algebraic geometry.

This PhD thesis concerns the topic of arithmetic geometry. We address three different questions and each of the questions in some way is about counting how big some set is or can be.

This research focuses on the (Quantum) Dynamics (QD) of the reactive scattering of H2 from metal surfaces.

Advanced sensing techniques require graphene with high quality and well-controlled surface chemistry.

The research presented in this thesis makes use of small molecules (as H2 , D2 and O2 ) on well-defined single crystal surfaces (flat Pt(111), flat Cu(211) and curved Pt(111)) to elucidate the role of surface structure and degrees of freedom in the reactant in specific surface reactions.

The International Course on Water Use and Management in Cagayan Valley The Philippines (2011-2015)

Human activity, such as pollution, may disturb the balance of living water systems, which has consequences for biodiversity, but also for other functions such as water purification. Leiden University maps living water systems using the most advanced technologies.

In this dissertation iron-based homogeneous catalysts were synthesized, characterized and investigated for water oxidation activity.

To design the ideal water oxidation catalyst, understanding of the catalytic mechanism and decomposition pathways is essential.

The dissociative chemisorption of a molecule on a transition metal surface represents a rate-limiting step in many heterogeneously catalyzed processes, whereby most chemicals are made. In spite of the importance of this reaction, an accurate first principles approach to modeling it does not yet exist.…

This project investigates ancient water management of streams, springs and runoffs on the archaeological site of Monte Albán, Mexico, as a means to contribute with different stakeholders in the development of sustainable solutions to water problems today such as floods and scarcity.