Search Results for: item/10864860/PhD-position-Global-flood-risk-assessment-and-behavioural-modelling-VU-Amsterdam/page/49/www.linkedin.com/in/apoorva-seeram

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Adsorption of Soil Organic Matter to Iron Oxides: Effects of Chemical Heterogeneity

  • 15 September, 2016
  • Wageningen University, Soil Chemistry and Chemical Soil Quality
  • prof. dr RNJ Comans
  • dr L Wengdr T Hiemstraprof. dr W Tan

The adsorption of soil organic matter (SOM) to minerals is considered to be a major mechanism protecting organic matter from biodegradation. In addition, the adsorption of organic matter on mineral surfaces influences the distribution and bioavailability of a range of nutrients and pollutants. However, when it comes to the nature of SOM in intimate association with mineral surfaces, there is no clear insight into the type and properties of that SOM fraction. This knowledge gap can be attributed to the complexity and heterogeneity of SOM itself and lack of understanding of the mechanisms of fractionation of SOM upon adsorption in a multi-component soil system. In this research, carefully designed lab experiments will be carried out to study the adsorption behavior of natural organic matter to goethite (to represent soil oxides). Advanced surface complexation modelling will be developed and applied to quantify and predict the complex reactions in the SOM-goethite system. The adsorption mechanisms and SOM fractionation revealed in the SOM-goethite system will form the basis to interpret characteristics of the heavy (organo-mineral associations) fractions of SOM which are physically fractionated based on density. The overall objective of this research is 1) to obtain a quantitative understanding of the mechanisms regulating fractionation of organic matter upon adsorption to oxides in soils, and 2) to obtain a better understanding of the type and properties of SOM associated with soil minerals, 3) to compare the results of 1) and 2) and to identify the similarities and differences between oxides and soil minerals in their preferences for SOM.

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Yun Xu

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High recovery and chemical-free desalination using advanced electrodialysis schemes

  • 1 May, 2022
  • Wageningen University, Environmental Technology
  • prof.dr. H.H.M. Rijnaarts
  • dr.ir. H. Bruningdr. J.W. Post

Desalination has become a significant alternative water source due to the growing water demand and inadequate conventional water sources in many regions. With the available mature membrane and thermal technologies in hybrid desalination plants, there seems not to be much room for improvements in energy consumption and desalination costs. Thus, we believe other drivers for innovation can be: (1) decreasing the environmental impact by avoiding chemicals additions and effects of brine discharge, (2) creating valuable water streams or mining of the valuable compounds from brines, while avoiding excess amounts of invaluable compounds, and (3) increasing the added value of already used desalted water for a second use in agriculture or aquifer recharge.

In this project, we will advance on chemical-free electrodialysis (ED) configurations in hybrid desalination schemes for high water-recovery and salts reuse. The created desalination scheme splits the saline source water into demineralized product water and multiple concentrated waste streams, with the desired specifications for eventual post-processing and recycling. We aim to achieve these goals without adding (high amounts of) salts or other chemicals, to avoid unnecessary ion accumulation in brines onsite or in the product water. The expect product of this project enables to achieve desalination by manipulating ionic compositions with the feed water and electrical energy as the sole inputs.

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Kecen Li

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SCAR Open Science Conference 2022 (Scientific Committee on Antarctic Research)


  • 01 - 10 August 2022
  • Online
  • National Centre for Polar and Ocean Research (NCPOR)
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Transdisciplinary Lunch Crowd: “The who, what, when, why and how tips for writing and submitting grant proposals”


  • 28 June 2022
  • Hybrid meeting, partly online, partly Wageningen campus
  • WIMEK, Wageningen University
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Conference TERRAenVISION: Nature-based solutions to facilitate the transitions for living within the planetary boundaries


  • 27 June - 01 July 2022
  • Utrecht
  • TERRAenVISION: Utrecht University, Rijkswaterstaat, Wageningen University and Research
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Urban Living Lab Summit 2022


  • 21 June 2022
  • Hybrid event, Amsterdam and online
  • Amsterdam Institute for Advanced Metropolitan Solutions (AMS)
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Scenarios Forum 2022: Forum on Scenarios for Climate and Societal Futures


  • 20 - 22 June 2022
  • Austria and online
  • IIASA, International Institute for Applied Systems Analysis
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4th Phosphorus in Europe Research Meeting (PERM)


  • 20 - 22 June 2022
  • Vienna, Austria
  • European Sustainable Phosphorus Platform
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Climate March 2022 Rotterdam


  • 19 June 2022
  • Rotterdam
  • Klimaat Coalitie
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Preconference “Co-creating sustainability science for impact: Integration of transdisciplinarity in research and education”


  • 13 June 2022
  • Wageningen Campus, Plus Ultra II
  • WIMEK, Wageningen University
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Masterclass on “Pirates, Prices, and Photos: Three Papers onFisheries in Indonesia”


  • 03 June 2022
  • Wageningen or online
  • WIMEK, Wageningen University
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Sediment analysis in the Yellow River Basin, China

  • 3 October, 2019
  • Wageningen University, Soil Physics and Land Management
  • prof. dr CJ Ritsema
  • dr JEM Baartman

Intense anthropogenic disturbance modified the vegetation cover and local landforms in the Loess Plateau, China. Understanding sediment dynamic responses to land use change is of vital importance to ensure sustainable catchment management. To meet this challenge, the proposed study will combine indices of connectivity and landscape evolution modelling to analyse (i) connectivity at large spatial scale; (2) compare structural and functional connectivity; (3) evaluate the impact of land use changes and (4) check dams on sediment redistribution. Thus, the study starts broad and gradually zooms in, both in terms of spatial scale as well as in process detail and complexity.

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Zhenni Wu

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Resource recovery from urban wastewater -Model-based evaluation and design-

  • 12 October, 2022
  • 11:00
  • Auditorium Wageningen University
  • Wageningen University, Environmental Technology
  • prof.dr. H.H.M. Rijnaarts
  • dr.ir. H.J. Cappondr. W.S. Chen

In the past decades, increasing interest and urge towards resource recovery from wastewater has been stimulating the development of relevant technologies. However, finding suitable solutions is not straightforward due to multi-disciplinary challenges. In this research a tool-box was developed, consisting of mathematically formulated indicators and models, which can facilitate decision-making to find economic, technically feasible, environmental sound and socially responsible resource recovery solutions at optimal scales, considering the local constraints and priorities. This way this project contributes to optimizing the implementation of technical solutions via process modelling of individual technologies and combinations thereof.

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Maria van Schaik

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Quantify the off-site impacts of existing and promising agricultural measures on water quantity and quality

  • 1 September, 2021
  • Wageningen University, Soil Physics and Land Management
  • prof. dr CJ Ritsema
  • Prof. dr. X LiuDr J.P. Carvalho Nunes

Before TGR impoundment, the reservoir region was a natural river with high flow velocity and largely uninterrupted hydrology, without algal blooms. After impoundment, the average flow velocity at the outlet of the TGRA decreased by an order of magnitude. This, together with alarming water quality, greatly favoured the occurrence of algal blooms in the backwater areas of TGR tributaries.
To prevent nitrogen, phosphorus and sediment from agricultural land entering into aquatic environments by surface runoff, appropriate tillage methods and land cover patterns have been developed and implemented. However, the effect of individual SWC measures or their combination on water quantity and quality (nutrients and yield) at the catchment scale has rarely been evaluated.
The overall project subdivided into 3 phases: in Phase 1, an inventory of existing SWC measures will be made and a list of new potentially promising measures will be compiled. Phase 2, focusing on the off-site effects on streamflow and water quality, using the SWAT model. In Phase 3, the results will be integrated into a database of existing and promising measures and from this, in combination with the modelling results, new policies will be formulated to achieve the AGD goals.

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Yinan Ning

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