SW—Soil and Water

McGechan, M.B.; Lewis, D.R.

doi:10.1006/bioe.2002.0125

Cited by 156 publications

(29 citation statements)

References 137 publications

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“…Pesticides and other agrochemicals, as well as a range of microorganisms such as virusses, bacteria and protozoa are listed among the pollutants that are carried by soil colloids. 8 The total amounts of the terrigenous elements Fe, La, Sc, Sm and Th found in the coffee beverage prepared from non-washed beans were higher than that from the washed ones (Fig. 1), demonstrating that substances from soil reached the beverage.…”

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 93%

“…The colloids are the most active portion of the soil, usually having a net negative charge, which is responsible for the retention of plant nutrients and other positively charged elements and molecules. 20 A review paper 8 described the adsorption to the mobile particles or colloids as the prevailing mechanism for the movement of pollutants in soils. Pesticides and other agrochemicals, as well as a range of microorganisms such as virusses, bacteria and protozoa are listed among the pollutants that are carried by soil colloids.…”

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

“…The same reasoning is used for many pesticides molecules that can be adsorbed depending on the properties of soil and the compound. 5,[7][8][9] The processes involved may be completely reversible by chemical and/or physical variations and the pesticide molecule released. 5,9,21 …”

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

“…4 * E-mail: fabiotag@cena.usp.br Agricultural soils from conventional farming are the sinks for most agrochemicals, of which residues may remain bound to the soil colloids for several years. [5][6][7][8][9] There is special concern about aldicarb, carbendazim, carbofuran, cypermethrin, deltamethrin, disulfoton, fenamiphos, flucythrinate, hexaconazole, oxamyl, permethrin, prochloraz, propiconazole, terbufos, triadimefon, triadimenol and triazophos that have maximum residue limits (MRL) established for coffee beans by the Codex Alimentarius. 10 These pesticides may be released from soil contaminated coffees during preparation, depending on the coffee brewing technique.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, a range of biological pollutants such as viruses, bacteria and protozoa can also be linked to and transported by the soil. 8 Consequently, there is a potential risk to human health if harmful substances and/or pathogenic microorganisms from soil reach the cup of coffee. In this work the transfer of impurities from soil-contaminated coffees to the beverage is assessed.…”

Section: Introductionmentioning

confidence: 99%

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Can impurities from soil-contaminated coffees reach the cup?

Tagliaferro

Fernandes

Bacchi

et al. 2007

J Radioanal Nucl Chem

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Depending on the harvest conditions, coffee beans can be contaminated by soil when dropped to the ground. It is well known that agricultural soils act as sinks for agrochemicals applied to the crops. While coffee is brewed, substances present in the roasted and ground coffee beans are extracted by hot water, emphasizing the need to assess the possible transfer of impurities from the soil to the beverage. Soil-contaminated samples of roasted coffee beans were split into 2 groups according to the treatments: (a) washed and ground and (b) only ground. Brewing was performed in a household espresso machine for both coffees. The resulting beverage was freeze-dried and the elemental composition determined by instrumental neutron activation analysis (INAA). The mass fractions of the terrigenous elements Fe, La, Sc, Sm and Th in the freeze-dried non-washed coffee beverages were, at least, 2 times higher than in the washed samples. These elements are tracers of the soil, indicating that the impurities from the soil reached the beverage.

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Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 93%

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

Section: Instrumental Neutron Activation Analysis (Inaa)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Can impurities from soil-contaminated coffees reach the cup?

Tagliaferro

Fernandes

Bacchi

et al. 2007

J Radioanal Nucl Chem

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Role of air‐water interfaces in colloid transport in porous media: A review

Flury

Aramrak

2017

Water Resources Research

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Air‐water interfaces play an important role in unsaturated porous media, giving rise to phenomena like capillarity. Less recognized and understood are interactions of colloids with the air‐water interface in porous media and the implications of these interactions for fate and transport of colloids. In this review, we discuss how colloids, both suspended in the aqueous phase and attached at pore walls, interact with air‐water interfaces in porous media. We discuss the theory of colloid/air‐water interface interactions, based on the different forces acting between colloids and the air‐water interface (DLVO, hydrophobic, capillary forces) and based on thermodynamic considerations (Gibbs free energy). Subsurface colloids are usually electrostatically repelled from the air‐water interface because most subsurface colloids and the air‐water are negatively charged. However, hydrophobic interactions can lead to attraction to the air‐water interface. When colloids are at the air‐water interface, capillary forces are usually dominant over other forces. Moving air‐water interfaces are effective in mobilizing and transporting colloids from surfaces. Thermodynamic considerations show that, for a colloid, the air‐water interface is the favored state as compared with the suspension phase, except for hydrophilic colloids in the nanometer size range. Experimental evidence indicates that colloid mobilization in soils often occurs through macropores, although matrix transport is also prevalent in absence of macropores. Moving air‐water interfaces, e.g., occurring during infiltration, imbibition, or drainage, have been shown to scour colloids from surfaces and translocate colloids. Colloids can also be pinned to surfaces by thin water films and capillary menisci at the air‐water‐solid interface line, causing colloid retention and immobilization. Air‐water interfaces thus can both mobilize or immobilize colloids in porous media, depending on hydrodynamics and colloid and surface chemistry.

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Properties, Sources, Pathways, and Fate of Nanoparticles in the Environment

Ju‐Nam¹,

Lead²

2016

Engineered Nanoparticles and the Environment: Biophysicochemical Processes and Toxicity

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SW—Soil and Water

Cited by 156 publications

References 137 publications

Can impurities from soil-contaminated coffees reach the cup?

Can impurities from soil-contaminated coffees reach the cup?

Role of air‐water interfaces in colloid transport in porous media: A review

Properties, Sources, Pathways, and Fate of Nanoparticles in the Environment

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