Integrating Rooftop Agriculture and Atmospheric Water Harvesting for Water‐Food Production Based on Hygroscopic Manganese Complex
Shan He, Primož Poredoš, Hao Qü, Xinge Yang, Mengjuan Zhou, Lulu Bai, Jiadong Shi, Wenshuai Chen, R.Z. Wang, Swee Ching Tan
Advanced Functional Materials
Urban Farm DB summary
A composite adsorbent combining manganese(II)-ethanolamine complexes with a hierarchical, interconnected polypyrrole-doped matrix was developed to reduce vapor diffusion resistance, a key factor limiting scale-up kinetics, achieving water uptake of 2.54 g per gram at 90% relative humidity with 62% of the water released within 30 minutes, enabling multiple daily capture-release cycles. A hybrid desorption mode combining photovoltaic electrical heating and solar heating achieved stable, high-yield water production, and simulation and feasibility verification showed that an atmospheric-water-irrigated rooftop farm could produce 879.9 g of water per square meter of sorbent per day and 1.28 kg of food per square meter of device within 14 days, without human intervention and independent of external water inputs.