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Anthropogenic, carbon-reinforced soil as a living engineered material

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Yang,  Fan       
NEAU-MPICI, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Antonietti,  Markus       
Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Yang, F., Fu, Q., & Antonietti, M. (2023). Anthropogenic, carbon-reinforced soil as a living engineered material. Chemical Reviews, 123(5), 2420-2435. doi:10.1021/acs.chemrev.2c00399.


Cite as: https://hdl.handle.net/21.11116/0000-000C-460B-A
Abstract
In recent years, the simple synthesis of artificial humic substances (A-HS) by alkaline hydrothermal processing of waste biomass was described. This A-HS was shown to support water and mineral binding, to change soil structure, to avoid fertilizer mineralization, and to support plant growth. Many of the observed macroscopic effects could, however, not be directly related to the minute amounts of A-HS which have been added, and an A-HS stimulated microbiome was found to be the key for understanding. In this review, we describe such anthropogenic soil in the language of the modern concept of living engineered materials and identify natural and artificial HS as the enabler to set up the interactive microbial system along the interfaces of the mineral grains. In that, old chemical concepts as surface activity, redox mediation, and pH buffering are the base of the system structure build-up and the complex self-adaptability of biological systems. The resulting chemical/biological hybrid system has the potential to address world problems as soil fertility, nutrition of a growing world population, and climate change.