“Geoaerosols”: their origin, transport and paradoxical behavior: a challenge to aerosol science

Holub, R.; Reimer, G.M.; Hopke, Philip K.; Hovorka, Jan; Krcmar, B.; Smrz, P. K.

doi:10.1016/s0021-8502(99)80067-6

Cited by 7 publications

(6 citation statements)

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“…Moreover, sulfate aerosols can directly affect the climate (Graf et al, 1998). In our previous work, particles carried by an ascending geogas flow in the soil (Holub et al, 1999(Holub et al, , 2001Cao et al, 2009Cao et al, , 2010bCao et al, , 2011Liu et al, 2011;Wei et al, 2013;Hu et al, 2015) were studied and found to contain sulfur. Further research showed that sulfur-containing particles carried by ascending geogas flows can be transported through the soil layers and into the atmosphere.…”

Section: Introductionmentioning

confidence: 98%

Sulfur-containing particles emitted by concealed sulfide ore deposits: an unknown source of sulfur-containing particles in the atmosphere

Cao

Jiang

et al. 2015

Atmos. Chem. Phys.

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Abstract. Sources of sulfur dioxide, sulfates, and organic sulfur compounds, such as fossil fuels, volcanic eruptions, and animal feeding operations, have attracted considerable attention. In this study, we collected particles carried by geogas flows ascending through soil, geogas flows above the soil that had passed through the soil, and geogas flows ascending through deep faults of concealed sulfide ore deposits, and analysed them using transmission electron microscopy. Numerous crystalline and amorphous sulfurcontaining particles or particle aggregations were found in the ascending geogas flows. In addition to S, the particles contained O, Ca, K, Mg, Fe, Na, Pb, Hg, Cu, Zn, As, Ti, Sr, Ba, Si, etc. Such particles are usually a few to several hundred nanometres in diameter with either regular or irregular morphology. The sulfur-containing particles originated from deep-seated weathering or faulting products of concealed sulfide ore deposits. The particles suspended in the ascending geogas flow migrated through faults from deepseated sources to the atmosphere. This is a previously unknown source of the atmospheric particles. This paper reports, for the first time, the emission of sulfur-containing particles into the atmosphere from concealed sulfide ore deposits. The climatic and ecological influences of these sulfurcontaining particles and particle aggregations should be assessed.

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Section: Introductionmentioning

confidence: 98%

Sulfur-containing particles emitted by concealed sulfide ore deposits: an unknown source of sulfur-containing particles in the atmosphere

Cao

Jiang

et al. 2015

Atmos. Chem. Phys.

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“…However, from size distributions we cannot obtain any information on the size of our particles. The reason is simple: coagulation rates are so high that the nascent number and size distributions quickly change into the observed ones [2]. The observed distributions accumulate at the end of the coagulation process, so this mode is called the "accumulation" mode.…”

Section: Geochemical and Aerosol Anomaliesmentioning

confidence: 99%

“…The high-efficiency filters (more than 99.97 efficient at the flow velocities employed [14,15]) are placed in front of the adsorbers "to prevent unwanted aerosols and dust from entering the adsorbers". They assume that the particles, sometimes called "geoaerosols" [2], "nanoscale metals", or "mobile metals" [4], penetrate through high-efficiency filters.…”

Section: Geochemistry Anomaliesmentioning

confidence: 99%

“…We sealed a cul-de-sac section inside an experimental mine in South West Colorado and in an underground cave in Northern Bohemia [2]. Both sites were free of dripping water, which could have conceivably generated small (below 100 nm) aerosols.…”

Section: Aerosol Anomaliesmentioning

confidence: 99%

“…The details are given in ref. 2. The existence of aerosols at 3 to 5 nm size indicates a nearby source (for instance, see ref.…”

Section: Aerosol Anomaliesmentioning

confidence: 99%

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Localization of a bound particle outside the potential well

Holub

Smrz²

2002

Can. J. Phys.

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We describe a simple effect predicted by standard quantum mechanics concerning a particle bound in a potential well brought to the zero-energy state by deformation of the well. When the effect takes place within a crack with impermeable walls the probability of localization of the particle reaches its maximum near the end of the crack. The wave function describing the bound particle may thus decohere far from the potential well. There are numerous instances of experimental data, gathered mostly by geochemists and other scientists over the last several decades, that are anomalous and defy all attempts to explain them by means of classical chemistry and physics. The common attribute of these data is a strange transport of particles over large distances that may be caused by the quantum effect described in the first part of the paper. The motivation for writing this paper is our hope to stimulate interest and critical testing of such an hypothesis. PACS Nos.: 03.65, 82.90, 91.90 Résumé : Nous décrivons un effet simple prévu par la mécanique quantique standard impliquant une particule liée dans un puits de potentiel et amenée à l'état d'énergie nulle par une déformation du puits. Lorsque cet effet se produit dans une fente avec des murs imperméables, la probabilité de localization de la particule atteint son maximum près du bord de la fente. La fonction d'onde décrivant la particule liée peut alors perdre sa cohérence à l'extérieur du puits. Il y a une foule d'exemples expérimentaux, recueillis surtout par des géochimistes et d'autres scientifiques depuis des décennies, qui sont anomaux et défient toutes les tentatives d'explication via les théories physiques et chimiques classiques. Le point commun de ces observations est un transport étrange de particules sur de grandes distances qui pourrait être causés par l'effet quantique décrit dans la première partie du papier. En écrivant ce papier, nous espérons susciter de l'intérêt et amener des chercheurs à tester cette hypothèse de façon critique.[Traduit par la Rédaction]

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TEM study of geogas-transported nanoparticles from the Fankou lead–zinc deposit, Guangdong Province, South China

Wei

Cao

Holub

et al. 2013

Journal of Geochemical Exploration

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“Geoaerosols”: their origin, transport and paradoxical behavior: a challenge to aerosol science

Cited by 7 publications

References 0 publications

Sulfur-containing particles emitted by concealed sulfide ore deposits: an unknown source of sulfur-containing particles in the atmosphere

Sulfur-containing particles emitted by concealed sulfide ore deposits: an unknown source of sulfur-containing particles in the atmosphere

Localization of a bound particle outside the potential well

TEM study of geogas-transported nanoparticles from the Fankou lead–zinc deposit, Guangdong Province, South China

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