Understanding the risks of plastic particles on immune health. Moderator-chair of EU POLYRISK Stakeholder Workshop, Amsterdam, 27 June 2025

Everyday Exposure: The ways you knew and didn’t know chemicals enter the body Talk. Private event, Amsterdam 6 May 2025

Microplastics & Performance: What Every Triathlete Should Know The Triathalon Nutrition Academy Podcast with Taryn Richardson, Brisbane, Australia 14 March 2025

Cutting Through The Microplastics Panic with Dr. Heather Leslie The Bright Side Podcast with Simone Boyce and Danielle Robay, Los Angeles, USA 19 Feb 2025

(Micro)plastic vervuiling – Wat weten wij en wat doen wij ermee? One Planetary Health Symposium Talk: Microplastics – Impact op gezondheid en innovatieve oplossingen, Koningszaal, ARTIS Groote Museum, Amsterdam  21 nov 2024

Current environmental plastic and associated chemicals research and paths forward CITE keynote, P-LEACH Stakeholder Workshop, Helmholtz UFZ, Leipzig 22 Oct 2024

A Scientist’s Thoughts on ArtScience Arts & Science Workshop Talk, Open University Utrecht, 14 March 2024

Zijn wij een beetje plastic van binnen en wat vinden wij van deze ontwerpkeus? [Are we a little bit plastic inside and what do we think of this design choice?] Meet the Masters Event featuring work of designer Christien Meindertsma. Invited lecture and interdisciplinary panel discussion. Stedelijk Museum Amsterdam. 29 October 2021

Zijn wij een beetje plastic?  Presentation of ZonMw Kennisagenda to Dutch State Secretary and ZonMw, Zoom, 11 Jan 2021

Marine Litter Science-Policy Speech. European Parliament, EU Action to Combat Marine Litter WS, Brussels, 3 May 2017

Science-Policy Speech on Limiting microplastics' uses and releases High-level European Commission Conference on Rethinking Plastics, Brussels, 26 Sept 2017

Questions and answers about synthetic fibers in sewage treatment Invited talk. Synthetic fiber workshop, Leeuwarden, 4 Nov 2019

Microplastic pollution in the environment Stakeholder workshop keynote, European Chemicals Agency, Helsinki, 30 May 2018

What are the effects of micro-plastics on human health? Plastic Justice Project, Zoom talk, 8 Feb 2021

Plastics the Environment and Us  Dalhousie Sustainability Lecture Series. Halifax, Canada, 2 Feb 2017

What if there’s plastic in our blood? Plastic Health Summit talk, Amsterdam, 3 Oct 2019

Hoe gaan we uiteindelijk ten onder aan plastic? Universiteit van Nederland (internet platform for top scientists), Nov 2018

Here be dragons: Exploring the terra incognita of microplastic pollution Netherlands Academy of Technology & Innovation, Invited talk. Amsterdam, 2019

Our technoexuberant relationship with plastic Vrije Wereld Lecture Series, Amsterdam, 2019

Cleaning our seas and oceans through enhanced ocean literacy  European Science Open Forum (ESOF), Talk and Panel Discussion, Manchester UK, 2016

A Felicitous Neo Past (art-science in practice) Invited talk at Art in the Anthropocene Conference, Trinity College Dublin, June 2019

How plastic are we? Geestdrift Festival, invited talk. Utrecht, 2019

Een schone zee begint op land: circulaire economie VNO-NCW (Netherlands Industry and Employers Federation), Annual meeting, Invited keynote. Delft, 24 May 2016

Latest research in plastic in the marine environment EU DG-ENV Conference on Plastic Waste, Invited talk. Brussels, 2013

Plastic in wastewater – what does that mean?  Waternet, Invited talk. Amsterdam, 2018

Can we design our plastic-pollution free future?  Design workshop, MU Gallery, Eindhoven, 17 Feb 2018

Measuring microplastics in the ocean (and beyond): the what, the why & the how  Sustainable Chemistry Symposium, Invited talk. University of Amsterdam, 13 Jun 2018

Microplastics. SCM-9 Internat Symposium on the Separation & Characterization of Natural & Synthetic Macromolecules, Keynote. 2019

Wat zit er in de plastic soep? Children's lecture, NEMO Science Museum,  Amsterdam, 2015 & 2019

Microplastics Measurements: The what the why and the how Analytica Conference, Invited lecture. Munich, Germany 11 Apr 2018

Thoughts on Transdisciplinarity from the Arena  SENSE Symposium, Invited lecture. Utrecht University, 6 Apr 2018

Lecture series Post Graduate Course Industrial Design, Theme: Environment & Design Royal Academy of Art, The Hague, 2015 and 2016

Plastic soup, plastic bouillon en een visie voor de toekomst [Plastic soup, plastic bouillon and a vision for the future] Interactive talk and interview, ‘1000 Dagen Plastic door Bahram Sadeghi’ Avondprogramma, Pakhuis de Zwijger, Amsterdam 29 Sept 2016

Getting up to QA/QC speed: an International interlaboratory study on Microplastics  Invited talk. European Commission JRC, Ispra, Italy, June 2019

Microplastics, the environment and us (A little story about technology biting back) Invited talk. Environmental Humanities Centre Symposium, Invited talk. Amsterdam, June 2018

An in-depth introduction to plastic in the environment Invited talk. International PBT Substances Symposium, Invited talk. Harbin, China, 9 Jan 2018

The marine litter problem Keynote at 4S Small Satellites Systems & Services Symposium, Malta, June 2016
Sources, fate and effects of plastics and micro-plastics in the marine environment UN GESAMP Working Group 40 Co-chair 2013-2015