Suchergebnisse

It is estimated that every year the world's population uses 1.5 times the planet's renewable resources. This trend can only increase as the middle classes everywhere are growing and extreme poverty is decreasing. In this context, the circular economy is attracting growing interest from citizens, entrepreneurs, governments and the academic world. To avoid the depletion of natural resources, this economy of "tomorrow" proposes the intensification of recycling - even the end of waste -, sustainable management of resources, collective policies governing production, as well as the use of goods and services. services rather than private policies that promote ownership and unlimited growth. This book, written under the auspices of the Institute for the Environment, Sustainable Development and the Circular Economy (EDDEC), presents the reflections of 50 experts, particularly in environment, industrial or chemical engineering, management, but also in economics, geography, anthropology and philosophy. In an accessible language, it takes stock of the need to turn to a model that respects nature and specifies the stakes of the survival of humanity.

AbstractTechnologies applicable at a field scale to mitigate soil and groundwater pollution by per‐ and polyfluoroalkyl substances (PFAS) due to the release of aqueous film‐forming foams are urgently needed. We demonstrate that modified bentonite clays as soil amendments can effectively reduce the leaching of PFAS from impacted soils. In batch experiments, the significant decrease (95%–99%) of leachable anionic PFAS, including perfluorooctane sulfonate, perfluorohexane sulfonate, and perfluorooctane carboxylate, was achieved in 1–4 days at a clay dosage as low as 0.5% w/w. A significant decline of leachable cationic and zwitterionic PFAS (70%–99%) was also observed. The clays performed the best in immobilizing PFAS anions, while granular activated carbon was effective in preventing PFAS cation leaching. Hardwood biochar had minor or negligible effects on any PFAS. The study provides strong evidence to support using modified clays as part of mitigation or remediation strategies to prevent PFAS from mobilizing on a field scale.Article Impact StatementThe study demonstrated that modified bentonite clays effectively immobilize various PFAS in AFFF‐contaminated soils to prevent leaching.