Developing efficient room-temperature adsorbents for carbon dioxide removal in enclosed spaces is crucial for safeguarding human health and mitigating CO2 emissions. Solid amine adsorbents are promising because of their high selectivity and low regeneration energy; however, achieving fast kinetics, high capacity, and long-term stability for indoor applications remains challenging. Here we used mesoporous silica foam with an ultra-large pore structure as support for polyethylenimine, diethanolamine, aminoethylethanolamine, and diethylenetriamine. The large pore volume of mesoporous silica foam enables high amine loadings, while amino alcohols weaken polyethylenimine chain entanglement and enhance accessibility of active sites. Surface silanol (Si–OH) groups further stabilize amino alcohols via hydrogen bonding, improving cyclic durability. Consequently, the hybrid amine adsorbents exhibit markedly enhanced CO2 uptake and faster kinetics than single-amine adsorbents. Notably, the adsorbent comprising a 1:1 mass ratio of polyethylenimine and diethanolamine, achieved 177 mg/g CO2 uptake, i.e., around 70
N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD) and its ozonation product, 6PPD-quinone (6PPD-Q), are contaminants of global concern due to their widespread occurrence and acute toxicity to aquatic organisms. Conventional treatment methods often fail to its complete removal in water. Peroxyacetic acid is extensively employed in advanced oxidation processes; however, it relies generally on ultraviolet light irradiation to generate reactive radical species. Here, we demonstrate for the first time that the target pollutant 6PPD-Q reacted with peroxyacetic acid to promote radical amplification and induced its own degradation without external energy input. Batch experiments were conducted under with and without ultraviolet irradiation at nearly neutral pH with varying peroxyacetic acid concentrations. The reaction of 6PPD-Q with peroxyacetic acid promoted radical amplification via electron transfer and semiquinone radicals formation, enabling 6PPD-Q degradation with more than 70
The rapid expansion of lithium-ion battery production has intensified demand for cobalt and nickel, while primary mining generates environmental burdens and supply vulnerabilities. Selective separation of cobalt from nickel ions remains one of the most technically challenging steps in battery recycling due to their similar ionic radii, hydration energies, and coordination chemistry. Here we tested a new 25 wt
Soil microplastic pollution is an increasing concern for agricultural soils, threatening soil functions and human health. Compost, used as green fertilizer, introduces microplastics into agricultural soils. Yet, quantifying the microplastics in compost and soil is challenging. We developed a method to estimate the microplastic content of composts derived from different organic waste, using Rock-Eval® analysis combined with the index of residual organic matter. We estimated the microplastic content of compost samples applied in a long-term field experiment and deduced the plastic-derived soil organic carbon pool. Our results showed that, after compost addition from 1998 to 2019, urban compost derived from biowaste and green-waste composted with sewage sludge stored respectively 16
