Personne
Houssni Lamkaddam
Publications associées (8)
Assessing the importance of nitric acid and ammonia for particle growth in the polluted boundary layer
Andrea Baccarini, Imad El Haddad, Lubna Dada, Houssni Lamkaddam
Aerosols formed and grown by gas-to-particle processes are a major contributor to smog and haze in megacities, despite the competition between growth and loss rates. Rapid growth rates from ammonium nitrate formation have the potential to sustain particle ...
2024Temperature, humidity, and ionisation effect of iodine oxoacid nucleation
Andrea Baccarini, Imad El Haddad, Lubna Dada, Houssni Lamkaddam
Iodine oxoacids are recognised for their significant contribution to the formation of new particles in marine and polar atmospheres. Nevertheless, to incorporate the iodine oxoacid nucleation mechanism into global simulations, it is essential to comprehend ...
Royal Soc Chemistry2024Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere
Andrea Baccarini, Imad El Haddad, Mihnea Surdu, Lubna Dada, André Welti, Houssni Lamkaddam
The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid ...
2023Equal abundance of summertime natural and wintertime anthropogenic Arctic organic aerosols
Julia Schmale, Imad El Haddad, Houssni Lamkaddam, Pragati Rai
Aerosols play an important yet uncertain role in modulating the radiation balance of the sensitive Arctic atmosphere. Organic aerosol is one of the most abundant, yet least understood, fractions of the Arctic aerosol mass. Here we use data from eight obser ...
2022High-frequency gaseous and particulate chemical characterization using extractive electrospray ionization mass spectrometry (Dual-Phase-EESI-TOF)
Andrea Baccarini, Imad El Haddad, Mihnea Surdu, Houssni Lamkaddam
To elucidate the sources and chemical reaction pathways of organic vapors and particulate matter in the ambient atmosphere, real-time detection of both the gas and particle phase is needed. State-of-the-art techniques often suffer from thermal decompositio ...
COPERNICUS GESELLSCHAFT MBH2022Large contribution to secondary organic aerosol from isoprene cloud chemistry
Julia Schmale, Imad El Haddad, Houssni Lamkaddam, Daniil Salionov, Sasa Bjelic
Aerosols still present the largest uncertainty in estimating anthropogenic radiative forcing. Cloud processing is potentially important for secondary organic aerosol (SOA) formation, a major aerosol component: however, laboratory experiments fail to mimic ...
2021Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry
Andrea Baccarini, Mihnea Surdu, Lubna Dada, Houssni Lamkaddam
Aerosol particles negatively affect human health while also having climatic relevance due to, for example, their ability to act as cloud condensation nuclei. Ultrafine particles (diameter Dp < 100 nm) typically comprise the largest fraction of the total nu ...
2021Real-Time Detection of Aerosol Metals Using Online Extractive Electrospray Ionization Mass Spectrometry
Christian Ludwig, Mohamed Tarik, Houssni Lamkaddam
Metal emissions are of major environmental and practical concern because of their highly toxic effects on human health and ecosystems. Current technologies available in the market for their detection are typically limited by a time resolution of 1 h or lon ...
AMER CHEMICAL SOC2020